From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5769 invoked from network); 31 Dec 2000 22:58:38 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 31 Dec 2000 22:58:38 -0000 Received: (qmail 3827 invoked from network); 31 Dec 2000 23:01:12 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 31 Dec 2000 23:01:12 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CrMy-00037X-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 22:54:28 +0000 Received: from tomts5.bellnexxia.net ([209.226.175.25] helo=tomts5-srv.bellnexxia.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CrMw-00037S-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 22:54:27 +0000 Received: from server1 ([216.209.110.160]) by tomts5-srv.bellnexxia.net (InterMail vM.4.01.03.00 201-229-121) with SMTP id <20001231225346.ILAK14993.tomts5-srv.bellnexxia.net@server1> for ; Sun, 31 Dec 2000 17:53:46 -0500 Message-ID: <001901c0737c$91e66bb0$0a00a8c0@ThreeLakes.ca> From: "Larry Kayser" To: rsgb_lf_group@blacksheep.org References: <004301c07378$fd0f9320$6dc07ad5@default> Subject: LF: Re: VE1ZZ Date: Sun, 31 Dec 2000 17:53:42 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Greetings all > Hi all Jack has posted his usual sked times to the DX Cluster (10 min tx > starting on the hour and half hour) starting at 2100z this evening 31 Dec. for some reason Jack stopped sending part way through his sked time of 2230 utc 20001231. Larry VA3LK From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12500 invoked from network); 31 Dec 2000 22:32:58 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 31 Dec 2000 22:32:58 -0000 Received: (qmail 6508 invoked from network); 31 Dec 2000 22:35:32 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 31 Dec 2000 22:35:32 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Cqxo-00030U-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 22:28:28 +0000 Received: from [194.73.73.176] (helo=protactinium) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Cqxn-00030P-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 22:28:27 +0000 Received: from [213.1.204.12] (helo=default) by protactinium with smtp (Exim 3.03 #83) id 14CqxU-0000bF-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 22:28:09 +0000 Message-ID: <004301c07378$fd0f9320$6dc07ad5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: VE1ZZ Date: Sun, 31 Dec 2000 22:27:33 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all Jack has posted his usual sked times to the DX Cluster (10 min tx starting on the hour and half hour) starting at 2100z this evening 31 Dec. through until 2230z at the moment but I expect he will continue until about 0130z. I have local noise so far this evening. Cheers de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22424 invoked from network); 31 Dec 2000 21:38:43 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 31 Dec 2000 21:38:43 -0000 Received: (qmail 25022 invoked from network); 31 Dec 2000 21:41:18 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 31 Dec 2000 21:41:18 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Cq4c-0002nQ-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 21:31:26 +0000 Received: from jubilee.ns.sympatico.ca ([142.177.1.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Cq4a-0002nL-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 21:31:25 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.91.13]) by jubilee.ns.sympatico.ca (Post.Office MTA v3.5.2 release 221 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Sun, 31 Dec 2000 17:31:11 -0400 Message-ID: <3A4FEC15.3A6C2A67@ns.sympatico.ca> Date: Sun, 31 Dec 2000 21:31:49 -0500 From: "John Currie" X-Mailer: Mozilla 4.7 [en]C-DIAL (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: lf testing Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Going to party Snow stopped Will be home at 0600 and will look /listen on 135.7 to 136.0 for 2 hours if see Email 73 de John VE1ZJ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7030 invoked from network); 31 Dec 2000 20:08:38 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 31 Dec 2000 20:08:38 -0000 Received: (qmail 8254 invoked from network); 31 Dec 2000 20:03:22 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 31 Dec 2000 20:03:22 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Cob1-0002Sz-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 19:56:47 +0000 Received: from jubilee.ns.sympatico.ca ([142.177.1.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Coaz-0002Su-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 19:56:46 +0000 Received: from ns.sympatico.ca ([142.177.41.153]) by jubilee.ns.sympatico.ca (Post.Office MTA v3.5.2 release 221 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Sun, 31 Dec 2000 15:56:26 -0400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A4FD5E1.2C54C29C@ns.sympatico.ca> Date: Sun, 31 Dec 2000 19:57:05 -0500 From: "John Currie" X-Mailer: Mozilla 4.7 [en]C-DIAL (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: LF Test freqs References: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Markus I dont think things are as hopeless as you think in the first place I would expect that the bandwidth of the Greek station is concentrated over 2 or 3 kHZ. The power is concentrated in the spectral lines caused by the keying. The lines are approximately 90 Hz apart, with little energy between the spectral lines. I saw the main line often this summer and fall when looking for Eu signals but didnt knoe what it was. I believe if you look at the picture I sent over of G0MRF sending RO and OOO, you will see the carrier of the Greek station. I am afraid that CFH can come on at anytime again in the near future and i am also afraid That 135.7 will be better than 135.9 at Jack's QTH as he lives much closer to CFH than I do. I think Jack may have a xtal for 136.0 kHz I would prefer that anyone trying to come easst to North America would use 135.7 to 135.8 Will anyone want to transmit tonight or tmw nite? MarkusVester@aol.com wrote: > Hi everybody, > > John wrote: > > I hear the Greek station weakly but dont belive it will > > stop receptoin below 135.8. > > Laurie wrote: > > I will try to be on after New Year celibrations and could > > use either my old freq. 135.722 or the new one 135.922. > > ... I'm afraid its an illusion that any of our amateur signals will make it > across on top of SVX. Just consider: If it has say 10 kW spread over 100 Hz > bandwidth and _if_ it is attenuated by additional 10 dB traveling over the > continent, this would still be the equivalent of 5 W in a BW of 1/2 Hz. If > John does not hear it loud its simply due to the fact that condx to EU were > not good enough for a contact. > > So my opinion, for a penny's worth: As long as CFH is off, let's use the qrss > segment at the upper end of the band, between 137.77 and 137.8. When CFH > comes back, stick to the 135.9 ... 136.0 plan. > > Happy New Year, take care > Markus From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7060 invoked from network); 31 Dec 2000 18:43:33 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 31 Dec 2000 18:43:33 -0000 Received: (qmail 21080 invoked from network); 31 Dec 2000 18:46:47 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 31 Dec 2000 18:46:47 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CnOx-00029O-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 18:40:15 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from d06lmsgate-3.uk.ibm.com ([195.212.29.3]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CnOv-00028t-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 18:40:13 +0000 Received: from d06relay02.portsmouth.uk.ibm.com (d06relay02.portsmouth.uk.ibm.com [9.166.84.148]) by d06lmsgate-3.uk.ibm.com (1.0.0) with ESMTP id SAA22628 for ; Sun, 31 Dec 2000 18:30:58 GMT X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (ss2.bld.socks.ibm.com [9.14.4.67]) by d06relay02.portsmouth.uk.ibm.com (8.8.8m3/NCO v4.95) with ESMTP id SAA291158 for ; Sun, 31 Dec 2000 18:39:24 GMT Message-ID: <3A4F7D49.4E1D2036@usa.net> Date: Sun, 31 Dec 2000 19:39:05 +0100 From: "Alberto di Bene" Organization: Undisclosed X-Mailer: Mozilla 4.76 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: VE1ZZ confirms sked References: <2000123101284868199@zetnet.co.uk> <3A4F2EAF.C1744432@usa.net> <3A4FADDF.D4A04BBB@ns.sympatico.ca> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: John Currie wrote: > Hi Alberto I found argo to be very sensitive and easy to use. When watching > VE1ZZ here I found that I had to reduce the sensitivity to one or else the > traces were thick and start and stop of dots and dashes had vertical bars on > them. Jack is very strong here > 63es Grazie de John VE1ZJ > Hi John, a suggestion : Argo starts with the AGC on by default (probably I will change this). In many cases, especially if you have strong statics, switch it off. When it is on, the statics are almost totally invisible on the screen, as the gain reacts in zero time (the signal is delayed), but an undesirable side effect is that dots and dashes are chopped for the duration of the static, due to the lowering of the gain of the magnitude->saturation mapping. So perhaps it is better to accept vertical stripes on the screen, but having unchopped dots/dashes. Good luck with your efforts, Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11045 invoked from network); 31 Dec 2000 17:52:07 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 31 Dec 2000 17:52:07 -0000 Received: (qmail 25479 invoked from network); 31 Dec 2000 17:46:52 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 31 Dec 2000 17:46:52 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CmTB-0001wg-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 17:40:33 +0000 Received: from imo-r07.mx.aol.com ([152.163.225.7]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CmT9-0001wE-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 17:40:32 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from G0MRF@aol.com by imo-r07.mx.aol.com (mail_out_v28.35.) id l.d9.e6d67f7 (8233) for ; Sun, 31 Dec 2000 12:39:42 -0500 (EST) From: G0MRF@aol.com Message-ID: Date: Sun, 31 Dec 2000 12:39:42 EST Subject: LF: Re: QRSS frequencies 12/13. To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: AOL 5.0 for Windows sub 105 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In a message dated 12/31/00 12:45:05 PM GMT Standard Time, g3ldo@zetnet.co.uk writes: << Steve GW4ALG said > As many of the the stations worked were using 136.5 +/- 200 Hz, > you can imagine my disappointment when QRM from the intermittent > carrier appeared on 136.5, with strong sidebands +/- 100 Hz > (already mentioned in other postings to this reflector). I did > try for further contacts: I stuck it out for a couple of hours, > but everyone else had given up - so I went to bed too. >> etc. Re: 12th /13. >From recent postings it appears VE1ZZ is now crystal controlled on 136.502 (ish) and I guess we'll be looking there on the 12/13. I do hope that's OK for an evening. However this is not really a suitable transmit frequency from Europe for our upcoming sked with John Jack and possibly Larry. Unlike the one way or crossband events, any two way will need to be closely coordinated. So where? 135.8 - 136.0 would be clear of the Greek RTTY and is a frequency previously favoured by John. 137.70 -137.80 is the traditional QRSS band in Eu and may be better if CFH is transmitting data on the LSB. BTW. Is there a congingency plan in the event of CFH being on that evening? For example, a remote receive site, a directional loop etc? I notice John G4CNN has had considerable success recentley receiving VE1ZZ on his new loop, so it can be done 'across the pond' . The ability for all the Europeans to QSY to the quietest end of the band on the night would be an advantage. - Maybe Mike's QRSS list could be updated. So, who's participating? I'll try and bribe my way into the tower again! 73 A happy New Year to all David G0MRF From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5729 invoked from network); 31 Dec 2000 17:46:26 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 31 Dec 2000 17:46:26 -0000 Received: (qmail 18846 invoked from network); 31 Dec 2000 17:41:11 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 31 Dec 2000 17:41:11 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CmNY-0001uI-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 17:34:44 +0000 Received: from jubilee.ns.sympatico.ca ([142.177.1.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CmNX-0001uD-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 17:34:43 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.89.11]) by jubilee.ns.sympatico.ca (Post.Office MTA v3.5.2 release 221 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Sun, 31 Dec 2000 13:34:34 -0400 Message-ID: <3A4FB4A1.97DD2033@ns.sympatico.ca> Date: Sun, 31 Dec 2000 17:35:13 -0500 From: "John Currie" X-Mailer: Mozilla 4.7 [en]C-DIAL (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: reception of DCF39 last night and today Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: HI all , last night DCF39 was strong at first then died S-units are 6 db apart S-7 corresponds to signal of 100 microvolts per meter +/- 3db 2230 S-5...0022 S-7....0058 S-6.5....0105 S-7....0107 S-7.5....0129 S-4.5.... 0200 S-3....0215 S_2....0259 S-2....0405....S-5 went to bed 1300 S-1/2....1620 S-1 ....1655 S-1 ....1730 S-1. Both 128.9 and DCF 39 were strong at 0107 128.9 was S-6.5 All day both stations were audible. 73 de John VE1ZJ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2998 invoked from network); 31 Dec 2000 17:33:18 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 31 Dec 2000 17:33:18 -0000 Received: (qmail 26509 invoked from network); 31 Dec 2000 17:36:32 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 31 Dec 2000 17:36:32 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CmIq-0001tR-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 17:29:52 +0000 Received: from imo-d10.mx.aol.com ([205.188.157.42]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CmIp-0001tI-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 17:29:51 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from MarkusVester@aol.com by imo-d10.mx.aol.com (mail_out_v28.35.) id l.d5.684051 (4355) for ; Sun, 31 Dec 2000 12:29:09 -0500 (EST) From: MarkusVester@aol.com Message-ID: Date: Sun, 31 Dec 2000 12:29:08 EST Subject: LF: LF Test freqs To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: AOL 4.0.i for Windows 95 sub 70 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi everybody, John wrote: > I hear the Greek station weakly but dont belive it will > stop receptoin below 135.8. Laurie wrote: > I will try to be on after New Year celibrations and could > use either my old freq. 135.722 or the new one 135.922. ... I'm afraid its an illusion that any of our amateur signals will make it across on top of SVX. Just consider: If it has say 10 kW spread over 100 Hz bandwidth and _if_ it is attenuated by additional 10 dB traveling over the continent, this would still be the equivalent of 5 W in a BW of 1/2 Hz. If John does not hear it loud its simply due to the fact that condx to EU were not good enough for a contact. So my opinion, for a penny's worth: As long as CFH is off, let's use the qrss segment at the upper end of the band, between 137.77 and 137.8. When CFH comes back, stick to the 135.9 ... 136.0 plan. Happy New Year, take care Markus From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22723 invoked from network); 31 Dec 2000 17:31:55 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 31 Dec 2000 17:31:55 -0000 Received: (qmail 18945 invoked from network); 31 Dec 2000 17:26:40 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 31 Dec 2000 17:26:40 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Cm9O-0001qh-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 17:20:06 +0000 Received: from jubilee.ns.sympatico.ca ([142.177.1.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Cm9N-0001qc-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 17:20:05 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.89.11]) by jubilee.ns.sympatico.ca (Post.Office MTA v3.5.2 release 221 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Sun, 31 Dec 2000 13:19:53 -0400 Message-ID: <3A4FB130.89343C79@ns.sympatico.ca> Date: Sun, 31 Dec 2000 17:20:32 -0500 From: "John Currie" X-Mailer: Mozilla 4.7 [en]C-DIAL (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: lf tests Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I am not sure what I will be doing tonight. We are scheduled to drive 20 Big Pond for New Years dance , But now is snow and rain mixture. If weather is bad we will be home and I will be looking 10 minutes after each hour and half hour for a period of 20 minutes . I will be looking between 135.7 and 135.8 . I can see the Greek station but I dont think it will hurt as its field strength / Hz is low unless one is transmitting right on a spectral line. Please let me know if you will be transmitting. If wx clears and we go to Big Pond I will send email. 73 es Happy new Year to all John VE1ZJ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25147 invoked from network); 31 Dec 2000 17:10:51 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 31 Dec 2000 17:10:51 -0000 Received: (qmail 8880 invoked from network); 31 Dec 2000 17:13:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 31 Dec 2000 17:13:26 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14ClwA-0001nA-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 17:06:26 +0000 Received: from jubilee.ns.sympatico.ca ([142.177.1.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Clw8-0001n4-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 17:06:25 +0000 Received: from ns.sympatico.ca ([142.177.89.11]) by jubilee.ns.sympatico.ca (Post.Office MTA v3.5.2 release 221 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Sun, 31 Dec 2000 13:05:45 -0400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A4FADDF.D4A04BBB@ns.sympatico.ca> Date: Sun, 31 Dec 2000 17:06:23 -0500 From: "John Currie" X-Mailer: Mozilla 4.7 [en]C-DIAL (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: VE1ZZ confirms sked References: <2000123101284868199@zetnet.co.uk> <3A4F2EAF.C1744432@usa.net> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Alberto I found argo to be very sensitive and easy to use. When watching VE1ZZ here I found that I had to reduce the sensitivity to one or else the traces were thick and start and stop of dots and dashes had vertical bars on them. Jack is very strong here 63es Grazie de John VE1ZJ Alberto di Bene wrote: > Peter Dodd wrote: > > > > > [snip] > > Downloaded Argo Beta and ran it from 0001 onward. > > I can see a lot more Loran lines than with Spectran. I can also see > > VE1ZZ better and although 'O' for only part of the time I can > > always tell when he is transmitting - so that I know when to transmit. > > [snip] > > Good, > this is what I was expecting. The algorithms are improved from > Spectran, and the next version of Spectran will inherit from the Argo > experience. TNX for this report. > > 73 > Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5095 invoked from network); 31 Dec 2000 14:14:53 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 31 Dec 2000 14:14:53 -0000 Received: (qmail 13759 invoked from network); 31 Dec 2000 14:17:27 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 31 Dec 2000 14:17:27 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CjDh-0001Cf-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 14:12:21 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from smtp-out2.bellatlantic.net ([199.45.40.144]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CjDg-0001CX-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 14:12:20 +0000 Received: from bellatlantic.net (client-151-200-123-2.bellatlantic.net [151.200.123.2]) by smtp-out2.bellatlantic.net (8.9.1/8.9.1) with ESMTP id JAA14842; Sun, 31 Dec 2000 09:11:02 -0500 (EST) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A5089E3.C869E749@bellatlantic.net> Date: Mon, 01 Jan 2001 08:45:08 -0500 From: "Andre' Kesteloot" X-Mailer: Mozilla 4.7 [en]C-CCK-MCD NSCPCD47 (WinNT; I) X-Accept-Language: en MIME-Version: 1.0 To: peter@unica.co.uk Cc: rsgb_lf_group@blacksheep.org Subject: Re: LF: LF-Group Reflector References: <015b01c07265$ec5aa240$de46a8c0@unica.co.uk> <001701c0731f$73ed8420$5b9474d5@w8k3f0> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Peter Indeed, and all our thanks and best wishes from this side of the Atlantic 73 Andre' N4ICK Dick Rollema wrote: > Dear Peter, > > Many thanks for your fb service running the RSGB-LF-Group Reflector. It is > just as important and useful as actual radio (wireless?) contacts on the > LF-band. > > I wish you and yours a happy and healthy New Year and hope you will keep the > reflector going for a long time to come. > > 73, Dick, PA0SE From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24695 invoked from network); 31 Dec 2000 14:14:14 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 31 Dec 2000 14:14:14 -0000 Received: (qmail 26849 invoked from network); 31 Dec 2000 14:08:59 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 31 Dec 2000 14:08:59 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Cj5K-0001AU-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 14:03:42 +0000 Received: from mail11.svr.pol.co.uk ([195.92.193.23]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Cj5J-0001AP-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 14:03:41 +0000 Received: from modem-96.ar-pharazon.dialup.pol.co.uk ([62.136.127.96] helo=lvm) by mail11.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14Cj5B-000283-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 14:03:33 +0000 Message-ID: <000101c07332$f14d2de0$607f883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. LF re Apology Date: Sun, 31 Dec 2000 14:06:25 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I may have added to the confusion last night. I heard a M signal from VE1ZZ during his 0000-0010 slot and made a short transmission on136.505 about 10Hz above Peter. Perhaps this was seen as instability on your transmissiom Peter! Further to my previous mail we must agree what frequencies to use for the EU/VE link. I thought that the band 135.910- 135.980 had been agreed. Best wishes for 2001 to all. Laurie. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8912 invoked from network); 31 Dec 2000 13:50:07 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 31 Dec 2000 13:50:07 -0000 Received: (qmail 27638 invoked from network); 31 Dec 2000 13:53:22 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 31 Dec 2000 13:53:22 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Cipo-000153-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 13:47:40 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from d06lmsgate-2.uk.ibm.com ([195.212.29.2]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Cipn-00014y-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 13:47:39 +0000 Received: from d06relay02.portsmouth.uk.ibm.com (d06relay02.portsmouth.uk.ibm.com [9.166.84.148]) by d06lmsgate-2.uk.ibm.com (1.0.0) with ESMTP id NAA108164 for ; Sun, 31 Dec 2000 13:32:50 GMT X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (ss7.bld.socks.ibm.com [9.14.4.72]) by d06relay02.portsmouth.uk.ibm.com (8.8.8m3/NCO v4.95) with ESMTP id NAA211216 for ; Sun, 31 Dec 2000 13:46:50 GMT Message-ID: <3A4F38B9.6821B909@usa.net> Date: Sun, 31 Dec 2000 14:46:33 +0100 From: "Alberto di Bene" Organization: Undisclosed X-Mailer: Mozilla 4.76 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: Re: New Years wish References: <004c01c07328$9e15f8a0$1a8701d4@g4jnt> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Andrew Talbot wrote: > [snip] > Interfacing via the parallel port is easy enough in DOS and WIN 3.1 but in > WIN9x it is a bit hit and miss depending on the ports implementation. > 16 bits via the serial port beeds really three bytes per sample. It can of > course be sent directly as two 8 bit words, but there is no way of keeping > in sync and knowing which word is high / low etc. By transmitting the 16 > bits over 3 words, check bits can be included to positively identify which > word is which out of the frame of three. > [snip] If someone is seriously considering designing and prototyping an acquisition board for the PC, please don't forget to give a more than casual thought to the USB port. It is an high-speed serial interface, and can even provide power supply to the connected devices. The old parallel and serial ports are on their way to the retirement... 73 Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17102 invoked from network); 31 Dec 2000 13:25:06 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 31 Dec 2000 13:25:06 -0000 Received: (qmail 12738 invoked from network); 31 Dec 2000 13:28:20 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 31 Dec 2000 13:28:20 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CiRw-0000zx-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 13:23:00 +0000 Received: from hs-img-2.compuserve.com ([149.174.177.151] helo=sphmgaab.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CiRv-0000zs-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 13:22:59 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by sphmgaab.compuserve.com (8.9.3/8.9.3/SUN-1.9) id IAA12852 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 08:22:50 -0500 (EST) Date: Sun, 31 Dec 2000 08:22:22 -0500 From: "'Geri' Kinzel, DK8KW" Subject: LF: First 2-way Slow-Voce QSO ...slow voice software....where ? To: rsgb_lf_group@blacksheep.org Message-ID: <200012310822_MC2-C021-681@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello David and LF-group, >where might this software be? no lf in usa, but 160m can be a bear too ! david< today, Markus, DF6NM and I have performed the first succesful 2-way LF QSO in slow-voice. Markus used a software named Goldwave (don't know where that can be found but Markus said it is shareware, so have a look in the Internet search machines ...). I used Cool Edit 2000, that can be downloaded at http://www.syntrillium.com (it is also shareware, the demo version comes with two functions only, you need to register to have full access to all features). We started at 137.350 to 137.600, where Markus was able to read my signal (8 times slower than normal voice) with 57. When I tried to receive him I found that the 1.7 kHz filter that I use in my MV62 Level Meter was too wide to prevent DCF39 from causing heavy QRM. The build-in 100 Hz filter is too narrow for the 250 Hz bandwidth we used. The 250 Hz filter that I use in the IC-746 that comes behind the level meter on 200 kHz is narrow enough, but it comes too late, the band is already spoiled by the Burg transmitter. The solution was to move 500 Hz further down, with our transmission spectrum situated between 136.850 and 137.100 kHz. I hope we did not cause any inconvenience to anyone tranmitting there. We have accompagnied our slow-voice transmissions with CW to steer the QSO. All in all it took about 2 1/2 hours to complete the QSO, whereby my report for Markus was 35, however, in a later transmission I could read him better than that (probably 45). The QSO mainly too that long because I had to fiddle around with the appropriate adjustments. For the transmission I used macros, so it took only one or two minutes to be able to transmit a 3 minute over. For reception I did not prepare anything and had to do some experimentation. For future transmissions we will need to find another way or a better clear spot, maybe even further reducing the bandwidt to 100 Hz and make use of the narrow filter ... I know that SSB QSOs have been performed in the band some years ago in the U.K., but this slow-voice transmission helps us to - overcome the bandwidth limitation in Germany (max. 800 Hz) - helps to prevent QRM aking best use of the availabel spectrum - increases the signal-to-noise ratio relative to the bandwidth used - ... and is a lot of fun ... hearing the other's voice clearly readibly despite the low signal strength! I will post some further information on my website (http://www.qru.de). So, a new field of experimentation. We will conduct further tests and improve the operating procedures. Maybe someone who has fun programming the Soundblaster card might want to develop a slow-voice software that allows more-or-less realtime QSOs ... Best 73, thanks to Markus, DF6NM for the nice experience, to Walter, DJ2LF for his reception report and a very happy New Year 2001 to you all! Geri, DK8KW (W1KW) Slow-Voice data of the QSO today (December 31, 2000): - transmitted audio bandwidth 300-2300 Hz (2000 Hz total bandwidth) - speed: 8 times slower than the normal voice - transmition mode: USB - total radio frequency bandwidth 250 Hz with 300 Hz audio equal to the lower frequency of the spectrum, 2300 Hz to the upper freqeuncy - QSO control by CW in the middle of the spectrum used From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5715 invoked from network); 31 Dec 2000 13:15:27 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 31 Dec 2000 13:15:27 -0000 Received: (qmail 21116 invoked from network); 31 Dec 2000 13:10:12 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 31 Dec 2000 13:10:12 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CiAO-0000vt-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 13:04:52 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from d06lmsgate.uk.ibm.com ([195.212.29.1]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CiAN-0000vo-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 13:04:51 +0000 Received: from d06relay02.portsmouth.uk.ibm.com (d06relay02.portsmouth.uk.ibm.com [9.166.84.148]) by d06lmsgate.uk.ibm.COM (1.0.0) with ESMTP id MAA68202 for ; Sun, 31 Dec 2000 12:49:14 GMT X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (ss7.bld.socks.ibm.com [9.14.4.72]) by d06relay02.portsmouth.uk.ibm.com (8.8.8m3/NCO v4.95) with ESMTP id NAA192980 for ; Sun, 31 Dec 2000 13:04:01 GMT Message-ID: <3A4F2EAF.C1744432@usa.net> Date: Sun, 31 Dec 2000 14:03:44 +0100 From: "Alberto di Bene" Organization: Undisclosed X-Mailer: Mozilla 4.76 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: VE1ZZ confirms sked References: <2000123101284868199@zetnet.co.uk> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Peter Dodd wrote: > > [snip] > Downloaded Argo Beta and ran it from 0001 onward. > I can see a lot more Loran lines than with Spectran. I can also see > VE1ZZ better and although 'O' for only part of the time I can > always tell when he is transmitting - so that I know when to transmit. > [snip] Good, this is what I was expecting. The algorithms are improved from Spectran, and the next version of Spectran will inherit from the Argo experience. TNX for this report. 73 Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24685 invoked from network); 31 Dec 2000 12:58:19 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 31 Dec 2000 12:58:19 -0000 Received: (qmail 24255 invoked from network); 31 Dec 2000 13:00:53 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 31 Dec 2000 13:00:53 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Ci1M-0000tJ-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 12:55:32 +0000 Received: from smtp-1.visp.telinco.net ([212.1.130.1]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Ci1L-0000tE-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 12:55:31 +0000 Received: from [212.1.135.26] (helo=g4jnt) by smtp-1.visp.telinco.net with smtp (Exim 3.16 #1) id 14Chtt-0005OU-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 12:47:50 +0000 Message-ID: <004c01c07328$9e15f8a0$1a8701d4@g4jnt> From: "Andrew Talbot" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: New Years wish Date: Sun, 31 Dec 2000 12:53:04 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.1 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: The EVM56002 is obsolete anyway, they are like gold dust now !! Motorola do an updated one with the 56300 (??) but it is very expensive and will need EVM software to be modified. Is 16 bits essential ? This makes interfacing a bit complex. Interfacing via the parallel port is easy enough in DOS and WIN 3.1 but in WIN9x it is a bit hit and miss depending on the ports implementation. 16 bits via the serial port beeds really three bytes per sample. It can of course be sent directly as two 8 bit words, but there is no way of keeping in sync and knowing which word is high / low etc. By transmitting the 16 bits over 3 words, check bits can be included to positively identify which word is which out of the frame of three. However, by using 14 bits of data per sample (still well over 80dB dynamic range) two 8 bit samples are possible, allowing one bit per word to identify high/low data. Andy G4JNT -----Original Message----- From: Larry Kayser To: rsgb_lf_group@blacksheep.org Date: 31 December 2000 03:44 Subject: LF: New Years wish >Greetings: > >Simple and succinct. A 16 bit A to D converter board that Alberto di Bene, >Bill de Carle can make their software work with so we can go to the next >level of digging in the noise. With the return of AMSAT big bird there will >not be a large number of EVM56002 protoboards available at low cost so the >need for an A to D board for general DSP is needed.. > >Board could work with either a Serial port or a Parallel port. > >Happy New Year to all. > >Larry >VA3LK > > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19898 invoked from network); 31 Dec 2000 12:52:56 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 31 Dec 2000 12:52:56 -0000 Received: (qmail 21690 invoked from network); 31 Dec 2000 12:55:30 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 31 Dec 2000 12:55:30 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Cht9-0000pt-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 12:47:03 +0000 Received: from lepidachrosite.lion-access.net ([212.19.217.3]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Cht8-0000pm-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 12:47:02 +0000 Received: from w8k3f0 (1Cust91.tnt27.rtm1.nl.uu.net [213.116.148.91]) by lepidachrosite.lion-access.net (I-Lab) with SMTP id 85C30CB816; Sun, 31 Dec 2000 12:46:50 +0000 (GMT) Message-ID: <001701c0731f$73ed8420$5b9474d5@w8k3f0> From: "Dick Rollema" To: peter@unica.co.uk Cc: "LF-Group" References: <015b01c07265$ec5aa240$de46a8c0@unica.co.uk> Subject: LF: LF-Group Reflector Date: Sun, 31 Dec 2000 12:46:34 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear Peter, Many thanks for your fb service running the RSGB-LF-Group Reflector. It is just as important and useful as actual radio (wireless?) contacts on the LF-band. I wish you and yours a happy and healthy New Year and hope you will keep the reflector going for a long time to come. 73, Dick, PA0SE From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14714 invoked from network); 31 Dec 2000 12:46:45 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 31 Dec 2000 12:46:45 -0000 Received: (qmail 17866 invoked from network); 31 Dec 2000 12:49:19 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 31 Dec 2000 12:49:19 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Chmr-0000nJ-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 12:40:33 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Chmq-0000nE-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 12:40:33 +0000 Received: from central.zetnet.co.uk (central.zetnet.co.uk [194.247.47.20]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id MAA23542 for ; Sun, 31 Dec 2000 12:40:24 GMT X-ZSender: g3ldo@zetnet.co.uk Message-ID: <2000123112535868199@zetnet.co.uk> Date: Sun, 31 Dec 2000 12:53:58 GMT To: rsgb_lf_group@blacksheep.org From: "Peter Dodd" X-Mailer: ZIMACS Version 1.20c 10000836 Subject: LF: Re: Apology Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Steve GW4ALG said > As many of the the stations worked were using 136.5 +/- 200 Hz, > you can imagine my disappointment when QRM from the intermittent > carrier appeared on 136.5, with strong sidebands +/- 100 Hz > (already mentioned in other postings to this reflector). I did > try for further contacts: I stuck it out for a couple of hours, > but everyone else had given up - so I went to bed too. A > disappointing end to an otherwise successful day. In addition Steve sent me a direct e-mail reprimanding me for poor operating, i.e using QRSS in the CW segment of the band and not sending QRL? before transmissions. Firstly I apologize to Steve for spoiling his operating session and I feel that an explanation is in order. For the last few weeks several of us have been receiving VE1ZZ using QRSS on 136.5kHz. This has not bothered CW operators because the signal is around 15 to 20dB below the noise and inaudible to CW operators. Last night, John, VE1ZJ indicated that he had installed Argo Beta1 software and would looking for any transmissions from EU in between VE1ZZs transmissions. The monitoring frequency was not given. Previous listening/looking frequencies were below 135.8kHz but since then the Greek RTTY station had moved down there. Additionally, if VE1ZJ was monitoring VE1ZZ I reasoned that the place he would be looking was near VE1ZZ's frequency. After 2300 the only stations I could see was VE1ZZ on QRSS and Steve calling CQ a bit further up the band. (I could not respond to Steve because the system was set up for QRSS). No other stations were present so I felt it was safe to transmit when VE1ZZ stopped. I went into listening mode during the planned VE1ZZ transmission times. To make things worse I appear to have had some instability with the transmitter driver during the transmit session just before 2359 hours. Again I apologize to Steve (or anyone else who this affected) and I will be QRT until the transmitter fault is resolved. The problem may have been cause by the very low temperature in the LF shack last night. Steve also reported 100Hz sidebands. Have other operators noticed this? It is obvious that some procedure will be required if the proposed LF tests with VE in January are to be achieved without conflict. Your suggestions are welcome. All the best for the New Year -- Regards, Peter, G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4111 invoked from network); 31 Dec 2000 12:36:23 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 31 Dec 2000 12:36:23 -0000 Received: (qmail 12440 invoked from network); 31 Dec 2000 12:39:37 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 31 Dec 2000 12:39:37 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Chd7-0000m2-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 12:30:29 +0000 Received: from [212.78.195.134] (helo=smtp3.bip.net ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Chd6-0000lx-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 12:30:28 +0000 Received: from HemmaPC (t1o940p48.telia.com [194.237.162.48]) by smtp3.bip.net (8.9.3/8.9.0) with SMTP id NAA07829 for ; Sun, 31 Dec 2000 13:30:09 +0100 Message-ID: <000a01c07325$69c9f040$30a2edc2@HemmaPC> From: "Urban ekholm" To: "RSGB" Subject: LF: Loading coil Q Date: Sun, 31 Dec 2000 13:29:13 +0100 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Hello to all !
 
During the Christmas vacation I found some wire that might be suitable for a loading coil. The wire has a cross section of 4.3 square mm.
I made a coil with a diameter of 38cm and a length of 20cm that gave an inductance of roughly 900uH. 
Measuring the coil Q revealed that having the coil elevated about 70cm above the floor (concrete) resulted in a Q of 300 and when putting the coil directly on the floor with the lowest turn about 5cm above the floor the Q was reduced to 220. The first 30 cm seemed to make a big difference. >From 30 up to 70cm did not make much change.
I had expected the Q to decrease, however not that much. The inductance was not very much changed. The change in resonance frequency was barely detectable.
 
Having seen on homepages that some of you have the coil standing quite close to ground it might be wise to elevate it somewhat.
 
Wish you all a happy new 2001 !
 
73 de SM5EUF / Urban   
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16236 invoked from network); 31 Dec 2000 11:39:11 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 31 Dec 2000 11:39:11 -0000 Received: (qmail 24551 invoked from network); 31 Dec 2000 11:41:43 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 31 Dec 2000 11:41:43 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Cglw-0000Vz-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 11:35:32 +0000 Received: from anchor-post-30.mail.demon.net ([194.217.242.88]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Cglv-0000Vu-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 11:35:31 +0000 Received: from alg.demon.co.uk ([194.222.171.80]) by anchor-post-30.mail.demon.net with esmtp (Exim 2.12 #1) id 14Cglm-000Bov-0U for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 11:35:23 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A4F1A45.27D7AD33@alg.demon.co.uk> Date: Sun, 31 Dec 2000 11:36:37 +0000 From: "Steve Rawlings" X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win98; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re.LF Tests References: <000101c07319$2e663240$549d883e@lvm> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: John wrote: > I hear the Greek station weakly but dont belive it will > stop receptoin below 135.8. Laurie wrote: > I will try to be on after New Year celibrations and could > use either my old freq. 135.722 or the new one 135.922. Hi Laurie, and a Happy New Year! If the Greek station will not bother John below 135.8, how about using your 135.722 frequency? The advantage would be that CW op's having simple receivers will be less affected by your (very strong!) signals. :-) Regards to all, Steve GW4ALG From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10917 invoked from network); 31 Dec 2000 11:34:08 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 31 Dec 2000 11:34:08 -0000 Received: (qmail 23555 invoked from network); 31 Dec 2000 11:28:52 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 31 Dec 2000 11:28:52 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CgXS-0000Qf-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 11:20:34 +0000 Received: from anchor-post-30.mail.demon.net ([194.217.242.88]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CgXR-0000Qa-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 11:20:33 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from alg.demon.co.uk ([194.222.171.80]) by anchor-post-30.mail.demon.net with esmtp (Exim 2.12 #1) id 14CgXH-000AzV-0U for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 11:20:23 +0000 Message-ID: <3A4F16C1.D7567B23@alg.demon.co.uk> Date: Sun, 31 Dec 2000 11:21:37 +0000 From: "Steve Rawlings" X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win98; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: "LF Group" Subject: LF: Report for Saturday Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi All, I managed to get four helium-filled balloons flying from 14:30 yesterday (30/12/2000) at a height of 27 metres. Occasionally the breeze came up, so down came the balloons. But, overall, conditions were sufficiently calm to work three new stations (all greater than 800 km), including a new 'first' from GW. First in the log were G6NB (good to hear you again, Bill) and G6RO. Then the arrival of a gentle breeze meant that I had to haul in the balloons. In the early evening, I worked: M0BMU - a big signal, Jim F6CNI - glad that we finally made another QSO, after many months DJ8WX - our first QSO, 860 km OZ1KMR - the first GW-OZ on 136 kHz, 896 km At about 19:30 the air became very still. What a lovely sight to see the balloons: now exactly above the anchor point. Very rarely do we get the kind of weather conditions that enable me to get the balloons up to 27 m - perhaps only 2 or 3 times each year. So I was set for an 'all nighter': a flask of coffee at the ready. During the evening I worked: G6RO - good signals from Ron's new antenna DK8KW - Geri! Nice to hear you again. AWDH DL3FDO - Very nice to work you Reiner, after a few 'near misses' in the past. 828 km. Up until 22:00, things had been going very well - and the antenna wire was still vertical over the anchor point. As many of the the stations worked were using 136.5 +/- 200 Hz, you can imagine my disappointment when QRM from the intermittent carrier appeared on 136.5, with strong sidebands +/- 100 Hz (already mentioned in other postings to this reflector). I did try for further contacts: I stuck it out for a couple of hours, but everyone else had given up - so I went to bed too. A disappointing end to an otherwise successful day. Today (Sunday), the weather is back to being wet and windy. So conditions are back to 'near normal' (for Wales!). A Happy New Year to all, Steve GW4ALG From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19798 invoked from network); 31 Dec 2000 11:08:45 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 31 Dec 2000 11:08:45 -0000 Received: (qmail 3765 invoked from network); 31 Dec 2000 11:11:18 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 31 Dec 2000 11:11:18 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CgGg-0000Mk-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 11:03:14 +0000 Received: from phoenix.coastalnet.com ([204.183.40.10]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CgGf-0000Mf-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 11:03:13 +0000 Received: from dad (NBN-TNT2-pool1-208.coastalnet.com [216.10.172.208]) by phoenix.coastalnet.com (8.9.3+Sun/8.9.3) with SMTP id GAA07620 for ; Sun, 31 Dec 2000 06:02:42 -0500 (EST) Message-ID: <003c01c07319$3fa61700$d0ac0ad8@dad> From: "David Michael Gaytko // WD4KPD" To: rsgb_lf_group@blacksheep.org References: <200012310151_MC2-C02D-4500@compuserve.com> Subject: LF: slow voice software....where ? Date: Sun, 31 Dec 2000 11:03:03 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: where might this software be? no lf in usa, but 160m can be a bear too ! david From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17123 invoked from network); 31 Dec 2000 11:05:27 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 31 Dec 2000 11:05:27 -0000 Received: (qmail 10083 invoked from network); 31 Dec 2000 11:08:42 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 31 Dec 2000 11:08:42 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CgCs-0000Ky-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 10:59:18 +0000 Received: from mail11.svr.pol.co.uk ([195.92.193.23]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CgCr-0000Kt-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 10:59:17 +0000 Received: from modem-84.dorthonion.dialup.pol.co.uk ([62.136.157.84] helo=lvm) by mail11.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14CgCj-000847-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 10:59:09 +0000 Message-ID: <000101c07319$2e663240$549d883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re.LF Tests Date: Sun, 31 Dec 2000 11:01:50 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: John wrote:- I hear the Greek station weakly but dont belive it will stop receptoin below 135.8. Here the whole band 135.75-135.85 is full of SXV sidebands! would it not be better to adopt the range of frequencies 200Hz higher as previously suggested? I will try to be on after New Year celibrations and could use either my old freq. 135.722 or the new one 135.922, these new frequencies avoid Loran lines I belive. 73s Laurie. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1484 invoked from network); 31 Dec 2000 10:42:28 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 31 Dec 2000 10:42:28 -0000 Received: (qmail 12610 invoked from network); 31 Dec 2000 10:37:13 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 31 Dec 2000 10:37:13 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Cfm0-0000FM-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 10:31:32 +0000 Received: from fm215.facility.pipex.com ([194.131.104.225]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Cflz-0000FH-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 10:31:31 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from 233.pncl.co.uk (248.234.35.212.in-addr.arpa.ip-pool.cix.co.uk [212.35.234.248]) by fm215.facility.pipex.com (8.9.3/8.9.3) with ESMTP id KAA15122 for ; Sun, 31 Dec 2000 10:27:17 GMT Message-ID: <5.0.2.1.2.20001231101949.00a71ec0@mail.pncl.co.uk> X-Sender: blanch@mail.pncl.co.uk X-Mailer: QUALCOMM Windows Eudora Version 5.0.2 Date: Sun, 31 Dec 2000 10:31:12 +0000 To: rsgb_lf_group@blacksheep.org From: "Walter Blanchard" Subject: LF: DCF spurious analysis In-reply-to: <82.4ebf8ca.277f4842@aol.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: At 14:16 30/12/00 Saturday, Markus wrote: >................Which of course brings up the matter of Loran lines. >At my qth, I do see some >in the upper part of the band, but below 137 kHz the noise appears to be >higher, and they are quite faint if visible at all. Looking around in the >neighbourhood of 100.0 kHz revealed three sets with periodicies of 5.5, 6.7 >and 7.5 Hz. They happen to peak around 137 kHz for some reason. A spectrum plot will show a dip around 125 kHz and a tail-off after 141 kHz. Are your periodicities right? Your local Loran is Sylt which double-rates at GRI 67310 uS (14.856633 Hz) and 74990 uS (13.335111 Hz) presumably giving you the "7.5" and "6.7" sets you mention. The third one "5.5" is about 11 Hz if doubled and corresponds to GRI 90070 (11.102476 Hz) which has a station at Vaerlandet (near enough Bergen) probably the one you see. They all switch phase between successive GRI's - maybe this is having an effect. Walter G3JKV. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16360 invoked from network); 31 Dec 2000 06:56:25 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 31 Dec 2000 06:56:25 -0000 Received: (qmail 15770 invoked from network); 31 Dec 2000 06:58:58 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 31 Dec 2000 06:58:58 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CcMh-00083U-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 06:53:11 +0000 Received: from hs-img-3.compuserve.com ([149.174.177.148] helo=sphmgaac.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CcMg-00083P-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 06:53:10 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by sphmgaac.compuserve.com (8.9.3/8.9.3/SUN-1.9) id BAA08545 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 01:53:01 -0500 (EST) Date: Sun, 31 Dec 2000 01:51:28 -0500 From: "'Geri' Kinzel, DK8KW" Subject: LF: Slow Voice Experiments To: rsgb_lf_group@blacksheep.org Message-ID: <200012310151_MC2-C02D-4500@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello LF Enthusuasts, after Markus' succesful one-way slow-voice transmission on LF we will try to conduct a two-way QSO in this mode today. I will use the follosing parameters: The audio frequency range between 300 Hz and 2300 Hz is reduced in speed by 8 times. The transmission spectrum after the conversion will be transmitted between 137.350 kHz and 137.600 kHz USB (250 Hz wide, so a narrow CW-filter can be used), so that 137.350 kHz corresponds to the 300 Hz audio frequency and 137.600 kHz corresponds to 2300 Hz audio. For demodulation with an audio mixing software (e.g. Cool Edit, Goldwave, etc.) two steps are necessary: first, the recording has to be speeded up by 8 times to re-gain the original audio bandwidth, second the audio signal has to be shifted by a certain fixed frequency to get the audio passband back to the original position. This can be done for example in Cool Edit using the "generate", "tone" menue and the "modulate" option, which simulates a ring modulator mixing with the generated frequency. After the ring modulation two sidebands are generated, so that one needs to be filtered out. Walter, DJ2LF, has successfully used another method to shift the audio frequency. He fed the audio signal into an SSB transceiver and could change the pitch by changing the receive frequency. Markus and I will meet today, Sunday, December 31st, 2000 at 09.00 UTC on 137.500 kHz in PSK31 to arrange the voice transmissions. In between the voice transmissions we will use CW on 137.475 kHz top arrange beginning and ending of the voice transmissions. In between the transmissions there will be a gap in which we will try to demodulate (and understand -hi-) the transmitted signal. If you hear any spurious signals outside of the announced band (137.350 to 137.600 kHz), please let me know. I am using a 135.500 kHz exciter signal fed by an audio frequency signal between 1850 and 2100 Hz to generate the LF signal and I will try to keep my transmission as clean as possible. Best 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 964 invoked from network); 31 Dec 2000 03:29:11 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 31 Dec 2000 03:29:11 -0000 Received: (qmail 12498 invoked from network); 31 Dec 2000 03:31:44 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 31 Dec 2000 03:31:44 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CZ3d-0007J8-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 03:21:17 +0000 Received: from tomts8.bellnexxia.net ([209.226.175.52] helo=tomts8-srv.bellnexxia.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CZ3c-0007J3-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 03:21:16 +0000 Received: from server1 ([216.209.110.111]) by tomts8-srv.bellnexxia.net (InterMail vM.4.01.03.00 201-229-121) with SMTP id <20001231032030.ZLDQ18753.tomts8-srv.bellnexxia.net@server1> for ; Sat, 30 Dec 2000 22:20:30 -0500 Message-ID: <003d01c072d8$aba518c0$0a00a8c0@ThreeLakes.ca> From: "Larry Kayser" To: rsgb_lf_group@blacksheep.org References: <3A4CBD40.62172391@alg.demon.co.uk> <3A4DB6C1.EC3B1B01@alg.demon.co.uk> <3A4EDA0A.1FF4D696@ns.sympatico.ca> Subject: LF: New Years wish Date: Sat, 30 Dec 2000 22:20:41 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Greetings: Simple and succinct. A 16 bit A to D converter board that Alberto di Bene, Bill de Carle can make their software work with so we can go to the next level of digging in the noise. With the return of AMSAT big bird there will not be a large number of EVM56002 protoboards available at low cost so the need for an A to D board for general DSP is needed.. Board could work with either a Serial port or a Parallel port. Happy New Year to all. Larry VA3LK From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1636 invoked from network); 31 Dec 2000 02:05:24 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 31 Dec 2000 02:05:24 -0000 Received: (qmail 215 invoked from network); 31 Dec 2000 02:08:39 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 31 Dec 2000 02:08:39 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CXp1-00073n-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 02:02:07 +0000 Received: from jubilee.ns.sympatico.ca ([142.177.1.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CXp0-00073i-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 02:02:06 +0000 Received: from ns.sympatico.ca ([142.177.90.97]) by jubilee.ns.sympatico.ca (Post.Office MTA v3.5.2 release 221 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Sat, 30 Dec 2000 22:01:56 -0400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A4EDA0A.1FF4D696@ns.sympatico.ca> Date: Sun, 31 Dec 2000 02:02:35 -0500 From: "John Currie" X-Mailer: Mozilla 4.7 [en]C-DIAL (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: GW4ALG QRV tonight References: <3A4CBD40.62172391@alg.demon.co.uk> <3A4DB6C1.EC3B1B01@alg.demon.co.uk> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Steve If you get this in time can you transmit tonight before 0430? If you can send email es i will look for you . Freq 136.5 or 135.712 73 de John VE1ZJ Steve Rawlings wrote: > Hi All, > > I managed to get the helium-filled balloons up to 27 m last night > (Friday) from my small garden, and had good QSOs with Dave > GM3YXM/P (New Galloway); Wolf DF0WD; and Werner ON6ND. I also > heard Wil PA0BWL; Rik ON7YD (- sorry for any QRM, Rik); Graham > G3XTZ; and Peter G3LDO. > > I didn't quite manage to complete a QSO with Andy F6CNI at 21:20 > (I didn't receive my report). But his signal was fully readable > one hour later when working Peter G3LDO. Unfortunately the > breeze came up and I had to dismantle the antenna system at about > 22:30. > > If possible, I'll get the balloons up again tonight (Saturday). > > Regards to all, > Steve GW4ALG From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6215 invoked from network); 31 Dec 2000 01:32:08 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 31 Dec 2000 01:32:08 -0000 Received: (qmail 21939 invoked from network); 31 Dec 2000 01:34:41 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 31 Dec 2000 01:34:41 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CXGz-0006uc-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 01:26:57 +0000 Received: from jubilee.ns.sympatico.ca ([142.177.1.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CXGy-0006uX-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 01:26:56 +0000 Received: from ns.sympatico.ca ([142.177.87.152]) by jubilee.ns.sympatico.ca (Post.Office MTA v3.5.2 release 221 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Sat, 30 Dec 2000 21:26:46 -0400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A4ED1CC.E8CF5B44@ns.sympatico.ca> Date: Sun, 31 Dec 2000 01:27:25 -0500 From: "John Currie" X-Mailer: Mozilla 4.7 [en]C-DIAL (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: lf tests References: <2000123022345568199@zetnet.co.uk> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Peter I should have clarified . I was listening around 135.7 ti 135.8 kHz. Sorry. 128.9 and DCF39 have been varying between S-5 and S-7.5 Best time was 0107, 128.9 S-6.5 and DCF39 was S7.5 I will listen / look at both the 135.7 and 136.0 kHz windows . No CFH but I expect it agn next week. I hear the Greek stn weakly but I don't believe it will stop receptioin beloe 135.8 73 de John VE1ZJ. Peter Dodd wrote: > Hi John, > > > Jack will tx from 2200 Z on usual timing . I am ready to listen > > agn If anyone wud like to transmit thi way , try tx from 10 minutes > > after the half hour and hour for 20 minutes. I am trying Alberto's > > new software and the Loran lines were good today. I might have had > > broken ground wire. I hope so . put new gnd wire on and screen looks > > good. > > I will transmit on 136.495 at 2310 and 2340 provided Jack is not transmitting > His signals peaked to R 'M' at 2310 and are still on at 2320 > > -- > Regards, Peter, G3LDO > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28019 invoked from network); 31 Dec 2000 01:19:08 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 31 Dec 2000 01:19:08 -0000 Received: (qmail 10484 invoked from network); 31 Dec 2000 01:22:23 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 31 Dec 2000 01:22:23 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CX5m-0006rd-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 01:15:22 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CX5l-0006rY-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 01:15:21 +0000 Received: from central.zetnet.co.uk (central.zetnet.co.uk [194.247.47.20]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id BAA16428 for ; Sun, 31 Dec 2000 01:15:13 GMT X-ZSender: g3ldo@zetnet.co.uk Message-ID: <2000123101284868199@zetnet.co.uk> Date: Sun, 31 Dec 2000 01:28:48 GMT To: rsgb_lf_group@blacksheep.org From: "Peter Dodd" X-Mailer: ZIMACS Version 1.20c 10000836 Subject: Re: LF: VE1ZZ confirms sked Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Alan Melia > Jack has confirmed he will continue transmitting tonight as usual on > the hours and half hours for 10minutes. > He was best here at 2200z good 'M' almost 'O', at 2300z he was only a 'T' > and I didnt see a trace at 2330z. I saw VE1ZZ 'M' to 'O' before midnight and transmitted at the times I said I would. >There were a couple of sessions of a big > signal from Peter, but then his TX has thrown a 'wobbly'....I guess he has > the wrench and blow-lamp out right now....Either that or he has melted the > snow for about three miles around East Preston, and its detuned his aerial. As far as I am aware the transmitter performed OK. When I went to receive I did see and hear a very things happening but was unable to make anything of it. It was a strong signal. I noticed that the frost an the loading coil plastic rain cover melted in the region of the windings only. The temperature in the shack was -3.5 degrees C Downloaded Argo Beta and ran it from 0001 onward. I can see a lot more Loran lines than with Spectran. I can also see VE1ZZ better and although 'O' for only part of the time I can always tell when he is transmitting - so that I know when to transmit. Conditions have to be better for a 1w erp QSO. Jack 'M' here at 0100, but now off to bed -- Regards, Peter, G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26165 invoked from network); 31 Dec 2000 00:49:54 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 31 Dec 2000 00:49:54 -0000 Received: (qmail 15731 invoked from network); 31 Dec 2000 00:44:40 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 31 Dec 2000 00:44:40 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CWVl-0006ir-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 00:38:09 +0000 Received: from anchor-post-31.mail.demon.net ([194.217.242.89]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CWVk-0006im-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 00:38:08 +0000 Received: from alg.demon.co.uk ([194.222.171.80]) by anchor-post-31.mail.demon.net with esmtp (Exim 2.12 #1) id 14CWVc-0007qe-0V for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 00:38:00 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A4E8030.79838EF@alg.demon.co.uk> Date: Sun, 31 Dec 2000 00:39:12 +0000 From: "Steve Rawlings" X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win98; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: VE1ZZ confirms sked References: <000901c072bd$90c9bee0$9c9101d5@default> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Alan Melia wrote: > It obviously good ballooning weather as there is a good signal from Steve, > but it does seem a bit noisy here tonight, and he is not getting many > answers. You're right there, Alan - that lousy QRM is still on 136.5 - an intermittent carrier (QRSS?) with strong sidebands +/- 100 Hz. Does anyone know who it is? Regards to all, Steve GW4ALG From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1216 invoked from network); 31 Dec 2000 00:16:37 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 31 Dec 2000 00:16:37 -0000 Received: (qmail 25165 invoked from network); 31 Dec 2000 00:11:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 31 Dec 2000 00:11:23 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CW0l-0006bl-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 31 Dec 2000 00:06:07 +0000 Received: from gadolinium.btinternet.com ([194.73.73.111]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CW0k-0006bg-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 00:06:06 +0000 Received: from [213.1.145.156] (helo=default) by gadolinium.btinternet.com with smtp (Exim 3.03 #83) id 14CW0c-0000kU-00 for rsgb_lf_group@blacksheep.org; Sun, 31 Dec 2000 00:05:58 +0000 Message-ID: <000901c072bd$90c9bee0$9c9101d5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: VE1ZZ confirms sked Date: Sun, 31 Dec 2000 00:05:58 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi All, Jack has confirmed he will continue transmitting tonight as usual on the hours and half hours for 10minutes. He was best here at 2200z good 'M' almost 'O', at 2300z he was only a 'T' and I didnt see a trace at 2330z. There were a couple of sessions of a big signal from Peter, but then his TX has thrown a 'wobbly'....I guess he has the wrench and blow-lamp out right now....Either that or he has melted the snow for about three miles around East Preston, and its detuned his aerial. It obviously good ballooning weather as there is a good signal from Steve, but it does seem a bit noisy here tonight, and he is not getting many answers. Good Luck de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17197 invoked from network); 30 Dec 2000 23:53:24 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 30 Dec 2000 23:53:24 -0000 Received: (qmail 8227 invoked from network); 30 Dec 2000 23:55:57 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 30 Dec 2000 23:55:57 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CVlC-0006Sm-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Dec 2000 23:50:02 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from d12lmsgate-3.de.ibm.com ([195.212.91.201]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CVlB-0006SK-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 23:50:01 +0000 Received: from d12relay02.de.ibm.com (d12relay02.de.ibm.com [9.165.215.23]) by d12lmsgate-3.de.ibm.com (1.0.0) with ESMTP id AAA195664 for ; Sun, 31 Dec 2000 00:49:21 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (ss3.bld.socks.ibm.com [9.14.4.68]) by d12relay02.de.ibm.com (8.8.8m3/NCO v4.95) with ESMTP id AAA106336 for ; Sun, 31 Dec 2000 00:49:03 +0100 Message-ID: <3A4E7459.9C75F171@usa.net> Date: Sun, 31 Dec 2000 00:48:41 +0100 From: "Alberto di Bene" Organization: Undisclosed X-Mailer: Mozilla 4.76 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: Strong signal from G3LDO References: <3A4E6ACF.F33E14D7@alg.demon.co.uk> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all, strong 'O' signal from G3LDO this evening at about 23:25 UTC here in Italy, using a TS850, with the HF dipole for 20 meters !!! I captured a couple of images to show the clarity of the signal. You can see them here : http://www.qsl.net/i2phd/argo/g3ldo.html The QRN level was very low, except for some statics, clearly seen on the Argo captured screens. Which was your ERP, Peter ? 73 Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17231 invoked from network); 30 Dec 2000 23:19:19 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 30 Dec 2000 23:19:19 -0000 Received: (qmail 2371 invoked from network); 30 Dec 2000 23:14:05 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 30 Dec 2000 23:14:05 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CV5V-0006Iu-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Dec 2000 23:06:57 +0000 Received: from finch-post-11.mail.demon.net ([194.217.242.39]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CV5U-0006Ip-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 23:06:56 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from alg.demon.co.uk ([194.222.171.80]) by finch-post-11.mail.demon.net with esmtp (Exim 2.12 #1) id 14CV5L-000GUQ-0B for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 23:06:47 +0000 Message-ID: <3A4E6ACF.F33E14D7@alg.demon.co.uk> Date: Sat, 30 Dec 2000 23:07:59 +0000 From: "Steve Rawlings" X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win98; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: "LF Group" Subject: LF: QRM on 136.500 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: The balloons here at GW4ALG are flying well and the local noise level is dropping . . . But a strong intermittent carrier is clobbering 136.5 kHz, the most commonly-used frequency for normal CW operation. Did anyone else hear the QRM? Could it be a rogue QRSS transmission? I tried calling the QRMer without success . . . Regards to all, Steve GW4ALG From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24728 invoked from network); 30 Dec 2000 22:52:56 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 30 Dec 2000 22:52:56 -0000 Received: (qmail 10103 invoked from network); 30 Dec 2000 22:47:42 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 30 Dec 2000 22:47:42 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CUfN-0006D9-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Dec 2000 22:39:57 +0000 Received: from carbon.btinternet.com ([194.73.73.92]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CUfM-0006D3-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 22:39:57 +0000 Received: from [213.122.192.240] (helo=default) by carbon.btinternet.com with smtp (Exim 3.03 #83) id 14CUfA-000741-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 22:39:44 +0000 Message-ID: <000301c072b1$839c2480$f0c07ad5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: VE1ZZ 'M' on QRSS 136.501kHz Date: Sat, 30 Dec 2000 22:39:46 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Jack, is on again this evening, not quite so good but it is early yet, and there is still quite a bit of static around, so a few dots missing from the copy. Cheers de Alan G3NYK JO02PB Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10448 invoked from network); 30 Dec 2000 22:36:11 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 30 Dec 2000 22:36:11 -0000 Received: (qmail 13761 invoked from network); 30 Dec 2000 22:30:56 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 30 Dec 2000 22:30:56 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CUOK-00067J-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Dec 2000 22:22:20 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CUOJ-00067E-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 22:22:19 +0000 Received: from central.zetnet.co.uk (central.zetnet.co.uk [194.247.47.20]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id WAA04437 for ; Sat, 30 Dec 2000 22:22:11 GMT X-ZSender: g3ldo@zetnet.co.uk Message-ID: <2000123022345568199@zetnet.co.uk> Date: Sat, 30 Dec 2000 22:34:55 GMT To: rsgb_lf_group@blacksheep.org From: "Peter Dodd" X-Mailer: ZIMACS Version 1.20c 10000836 Subject: Re: LF: lf tests Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Hi John, > Jack will tx from 2200 Z on usual timing . I am ready to listen > agn If anyone wud like to transmit thi way , try tx from 10 minutes > after the half hour and hour for 20 minutes. I am trying Alberto's > new software and the Loran lines were good today. I might have had > broken ground wire. I hope so . put new gnd wire on and screen looks > good. I will transmit on 136.495 at 2310 and 2340 provided Jack is not transmitting His signals peaked to R 'M' at 2310 and are still on at 2320 -- Regards, Peter, G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2399 invoked from network); 30 Dec 2000 22:29:33 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 30 Dec 2000 22:29:33 -0000 Received: (qmail 15250 invoked from network); 30 Dec 2000 22:32:48 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 30 Dec 2000 22:32:48 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CUQN-00068F-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Dec 2000 22:24:27 +0000 Received: from fortune-rwcmta.excite.com ([198.3.99.203] helo=fortune.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CUQL-00068A-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 22:24:26 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by fortune.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001230222407.GXHU9490.fortune.excite.com@almond.excite.com> for ; Sat, 30 Dec 2000 14:24:07 -0800 Message-ID: <3945290.978215047415.JavaMail.imail@almond.excite.com> Date: Sat, 30 Dec 2000 14:24:03 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: lf tests MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 213.104.152.122 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi John and All, Jack's signal at 22.00 tonight (2000.12.30) is a little weaker than when I recorded him a week ago, but still quite readable. I would give him OMO. The main thing is to set up Spectrogram properly and to use a decent antenna, then it is no problem to copy him. My local noise source seems to be off at this hour - can't imagine what it is. Unfortunately I am not in the 1 Watt league, so can't reply. Is the night of the 12/13 Jan fixed for a two-way attempt? 73, John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7863 invoked from network); 30 Dec 2000 20:54:57 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 30 Dec 2000 20:54:57 -0000 Received: (qmail 15146 invoked from network); 30 Dec 2000 20:58:11 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 30 Dec 2000 20:58:11 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CSxe-0005mf-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Dec 2000 20:50:42 +0000 Received: from jubilee.ns.sympatico.ca ([142.177.1.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CSxd-0005ma-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 20:50:42 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.90.1]) by jubilee.ns.sympatico.ca (Post.Office MTA v3.5.2 release 221 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Sat, 30 Dec 2000 16:50:28 -0400 Message-ID: <3A4E910A.8FA486E5@ns.sympatico.ca> Date: Sat, 30 Dec 2000 20:51:06 -0500 From: "John Currie" X-Mailer: Mozilla 4.7 [en]C-DIAL (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: lf tests Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all, Jack is getting ready for my visit running fone line into shack and making a set so my computer can key his tx . If you know of any potential trouble there pse let me know. Jack will tx from 2200 Z on usual timing . I am ready to listen agn If anyone wud like to transmit thi way , try tx from 10 minutes after the half hour and hour for 20 minutes. I am trying Alberto's new software and the Loran lines were good today. I might have had broken ground wire. I hope so . put new gnd wire on and screen looks good. If you are reading Alberto tnx for ARGO If anyone will tx tonight pse send me Email 73 all es gud luck de John VE1ZJ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24658 invoked from network); 30 Dec 2000 19:27:12 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 30 Dec 2000 19:27:12 -0000 Received: (qmail 23207 invoked from network); 30 Dec 2000 19:21:59 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 30 Dec 2000 19:21:59 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CRTp-0005T5-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Dec 2000 19:15:49 +0000 Received: from ewey-rwcmta.excite.com ([198.3.99.191] helo=ewey.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CRTo-0005T0-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 19:15:48 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by ewey.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001230191508.TTCL24504.ewey.excite.com@almond.excite.com> for ; Sat, 30 Dec 2000 11:15:08 -0800 Message-ID: <13915983.978203708349.JavaMail.imail@almond.excite.com> Date: Sat, 30 Dec 2000 11:15:05 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: DCF spurious: EMRP correction MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 62.253.64.5 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Marcus, That was me mate. Thanks for the details and the formulae concerning the interaction between DCF42 and DCF49. For your information I have calculated the spurii resulting from these interactions within the 136kHz band and published a complete list on my web page: www.g4cnn.f2s.com If these are correct and complete, hopefully the LF group can use them as a guide to what should be avoided when selecting frequencies for tests. Vy 73, John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12685 invoked from network); 30 Dec 2000 18:12:15 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 30 Dec 2000 18:12:15 -0000 Received: (qmail 28654 invoked from network); 30 Dec 2000 18:15:29 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 30 Dec 2000 18:15:29 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CQO7-0005DB-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Dec 2000 18:05:51 +0000 Received: from rhenium.btinternet.com ([194.73.73.93] helo=rhenium) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CQO6-0005D6-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 18:05:50 +0000 Received: from [62.7.64.41] (helo=default) by rhenium with smtp (Exim 3.03 #83) id 14CQNy-0004N3-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 18:05:42 +0000 Message-ID: <020601c0728b$37a5b080$2940073e@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: EasyGram download Date: Sat, 30 Dec 2000 15:25:21 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Dick, I have also had the same problem, I suspect it may be at Petr's end, or maybe the links to his ISP. Cheers de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23905 invoked from network); 30 Dec 2000 15:47:53 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 30 Dec 2000 15:47:53 -0000 Received: (qmail 27237 invoked from network); 30 Dec 2000 15:51:08 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 30 Dec 2000 15:51:08 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14COBu-0004iR-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Dec 2000 15:45:06 +0000 Received: from imo-r12.mx.aol.com ([152.163.225.66] helo=imo-r12.mail.aol.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14COBt-0004iM-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 15:45:05 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from MarkusVester@aol.com by imo-r12.mx.aol.com (mail_out_v28.35.) id l.4b.584f616 (18251) for ; Sat, 30 Dec 2000 10:44:19 -0500 (EST) From: MarkusVester@aol.com Message-ID: <4b.584f616.277f5cd2@aol.com> Date: Sat, 30 Dec 2000 10:44:18 EST Subject: LF: DCF spurious: EMRP correction To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: AOL 4.0.i for Windows 95 sub 70 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all, after re-reading, I discovered a silly mistake in the calculation of the DCF42/49 radiated powers. When converting calculated isotropic EIRP from 170 km to monopole-radiated EMRP I had multiplied by 3 instead of dividing, so all the powers given were too high by a factor of 9. The corrected list is 134.1725 kHz wideband, +41 dBuV/m = 4.2 W EMRP, 135.360 kHz, +21 dBuV/m = 42 mW EMRP, 136.5475 kHz, +1 dBuV/m = 0.42 mW, 136.5018 kHz, -9 dBuV/m = 0.04 mW, 136.4904 kHz and others, -15 dBuV/m = 0.01 mW. Who was it who said recently that you find the bugs the moment your software is out of your door? Best wishes agn Markus From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20518 invoked from network); 30 Dec 2000 15:13:30 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 30 Dec 2000 15:13:30 -0000 Received: (qmail 26235 invoked from network); 30 Dec 2000 15:16:45 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 30 Dec 2000 15:16:45 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CNf1-0004bn-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Dec 2000 15:11:07 +0000 Received: from phobos.unica.co.uk ([208.239.240.147] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CNf0-0004bi-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 15:11:06 +0000 Received: from [194.222.180.238] (helo=zork) by phobos.unica.co.uk with asmtp (Exim 3.13 #2) id 14CNek-0000HG-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 10:10:50 -0500 Message-ID: <015b01c07265$ec5aa240$de46a8c0@unica.co.uk> From: "Peter Bowyer" To: rsgb_lf_group@blacksheep.org Subject: LF: Large attachments Date: Sat, 30 Dec 2000 13:39:22 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Folks Several people have tried to send some huge files to the rsgb_lf_group reflector in the past couple of days - for your info, nothing bigger than 40k bytes will be accepted, anything bigger is held in a queue for me to look at. Blacksheep policy doesn't allow distribution of big files, our resources are not up to the job. Thanks and Happy New Year to all Peter G4MJS Blacksheep.org shepherd From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3220 invoked from network); 30 Dec 2000 14:21:47 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 30 Dec 2000 14:21:47 -0000 Received: (qmail 4706 invoked from network); 30 Dec 2000 14:25:02 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 30 Dec 2000 14:25:02 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CMrY-0004O3-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Dec 2000 14:20:00 +0000 Received: from smtp-1.visp.telinco.net ([212.1.130.1]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CMrX-0004Ny-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 14:19:59 +0000 Received: from [212.1.153.57] (helo=g4jnt) by smtp-1.visp.telinco.net with smtp (Exim 3.16 #1) id 14CMiR-0003qX-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 14:10:35 +0000 Message-ID: <002801c0726a$ff1c04a0$399901d4@g4jnt> From: "Andrew Talbot" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Argo beta 1 released Date: Sat, 30 Dec 2000 14:15:42 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.1 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Downloaded ARGO, installed and tested 100% OK. Decodes my 10Hz wide SMT Hell beacon signal on the " 10s " dot setting. A few more settings would be useful how about binary increments of dot length from say 0.5 to 32s. and an indication of the frequency resolution. Also I would prefer a monochrome palette as an option, weak signals stand out better in a grey scale. Alternatively a colour one going from red through yellow, to green to blue is an 'industry standard' for waterfall plots. Andy G4JNT -----Original Message----- From: Alberto di Bene To: rsgb_lf_group@blacksheep.org Date: 29 December 2000 17:58 Subject: LF: Argo beta 1 released >I have just uploaded Argo beta 1, a QRSS/DFCW viewer. >You can download it from http://www.qsl.net/i2phd/argo > >Please test it and give your impressions, suggestions, >critics, etc. > >It won't touch in any way your Windows mixer, so those >who were scared by the first build of Spectran beta 4 >can rest assured that no harms will be done to their PCs. > >The current presets are only tentative, and can be changed >following your suggestions. > >Waiting for your feedback, > >Alberto I2PHD > >P.S. The package contains a readme with all the instructions. >Please read it. > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2233 invoked from network); 30 Dec 2000 14:20:37 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 30 Dec 2000 14:20:37 -0000 Received: (qmail 12821 invoked from network); 30 Dec 2000 14:23:50 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 30 Dec 2000 14:23:50 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CMp2-0004No-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Dec 2000 14:17:24 +0000 Received: from imo-r13.mx.aol.com ([152.163.225.67] helo=imo-r13.mail.aol.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CMp0-0004Nj-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 14:17:22 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from MarkusVester@aol.com by imo-r13.mx.aol.com (mail_out_v28.35.) id l.82.4ebf8ca (8327) for ; Sat, 30 Dec 2000 09:16:34 -0500 (EST) From: MarkusVester@aol.com Message-ID: <82.4ebf8ca.277f4842@aol.com> Date: Sat, 30 Dec 2000 09:16:34 EST Subject: LF: DCF spurious analysis To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: AOL 4.0.i for Windows 95 sub 70 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi John, hi all, G4CNN wrote > If you are sure that it is DCF49/42 please explain how you think the spur > frequencies might be derived. I would like to learn a little more. > Happy New Year, John, G4CNN Yes John, I'm quite certain about the source of the problem. A while ago, I also had a very interesting talk with Gamal Soegiono, who knows a lot more about these things than I do and lives much closer to Frankfurt. Yesterday I made some more detailed measurements of the relevant frequencies and repeated the attenuator tests to make sure the IM was not produced by the rx. The two transmitters DCF42 and DCF49 are colocated at the same site (Mainflingen), using seperate antennas. The intermodulation is caused by the significant coupling between antennas and the nonlinearity in the tx output stage, in spite of the selectivity of the antenna matching circuits. DCF 42 is used to transmit DGPS data and has a fairly complex spectrum, looking like a USB signal with a reduced carrier. This carrier (the "pilot" as it aids the synchronisation of the decoders) is at fp = 122.500 kHz, -15dBc. The information is sent at a data rate of fd = 1187.5 Hz in a 2.3 kHz wide noise-like spectrum around fp+fd = 123.6875 kHz ("0 dBc") in PSK (or is it MSK?). This contains most of the transmitted energy. The signal is accompanied by a number of undesired sidebands. There is a significant line at fp-fd = 121.3125 kHz, -48dBc, caused either a second harmonic in the pilot generator or (more likely) by self-intermodulation of the data spectrum. This line again is accompanied by a set of satellites at (fp-fd) +- (fd/26) = (fp-fd) +- 45.67Hz, -58 dBc and smaller ones (fp-fd)+- n * (fd/104) = (fp-fd) +- n * 11.42 Hz, up to -63 dBc. These are apparently caused by 26- and 104-bit periodicities in the data. In the main spectrum you can actually find repeating frames of 88 ms duration. The next harmonic to the pilot is also visible here at (fp-2*fd) = 120.125, -67dBc. DCF49 is stronger, but simpler, and used for telecontrol of switched-tariff electricity meters and street lights. Most of the time, it transmits its idle frequency of f(DCF49) = 128.930 kHz, accompanied only by the Luxembourg effect of several broadcasting stations (Deutschlandfunk on LF, Voice of Russia on MF). However, at least every 12 seconds it is modulated by bursts of 200 bd, +340 Hz shift FSK. Like DBF39, the modulation is phase-continuous, so the the carrier does not return to its old phase after a data packet, which sets a 0.1Hz lower limit on the usable detection bandwidth for DX-experiments a la VK2ZTO. The intermodulation spectrum is now easy to explain by the third-order scheme f(IMP) = 2* f(DCF49) - f(DCF42). All of these carry the DCF49 bursts at +680 Hz shift. The strongest components are the broadband data around 2*f(DCF49) - (fp+fd) = 134.1725 kHz, +41 dBuV/m = 38 W EMRP and the pilot image 2*f(DCF49) - fp = 135.360 kHz, +21 dBuV/m = 400 mW EMRP, comparable to a good amateur station and thus perhaps a useful DX-indicator. Some products in our band are 2*f(DCF49) - (fp-fd) = 136.5475 kHz, +1 dBuV/m = 4 mW , which was also noted by Alan 'NYK a while ago, 2*f(DCF49) - (fp-fd) +- (fd/26) = 136.5018 kHz (!), -9 dBuV/m = 0.4 mW, 2*f(DCF49) - (fp-fd) +- n(fd/104), eg. 136.4904 kHz, -15 dBuV/m = 0.1 mW. The bad news of course is 136501.8 Hz, spot on VE1ZZ's frequency. There are only two things which could help us down here: - Either one of the telecom technicians reads this and decides to readjust the traps at the tx location to get a few dB better decoupling, - or Jack pulls his crystal a bit to qsy somewhere between .496 and .499 kHz. Which of course brings up the matter of Loran lines. At my qth, I do see some in the upper part of the band, but below 137 kHz the noise appears to be higher, and they are quite faint if visible at all. Looking around in the neighbourhood of 100.0 kHz revealed three sets with periodicies of 5.5, 6.7 and 7.5 Hz. Ok, that was a lot of stuff, hopefully interesting to some. 73 es all the best for the New Year Markus DF6NM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7923 invoked from network); 30 Dec 2000 12:38:47 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 30 Dec 2000 12:38:47 -0000 Received: (qmail 22020 invoked from network); 30 Dec 2000 12:41:20 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 30 Dec 2000 12:41:20 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CLDo-00040s-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Dec 2000 12:34:52 +0000 Received: from [194.73.73.138] (helo=ruthenium) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CLDn-00040n-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 12:34:51 +0000 Received: from [62.7.81.135] (helo=z0w6t5) by ruthenium with smtp (Exim 3.03 #83) id 14CLDf-0004lI-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 12:34:43 +0000 Message-ID: <002801c0725d$0b934620$8751073e@z0w6t5> From: "Bill Staples" To: rsgb_lf_group@blacksheep.org Subject: LF: pr Date: Sat, 30 Dec 2000 12:35:11 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Happy new year to one and all Bill G0AKY From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2410 invoked from network); 30 Dec 2000 12:32:47 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 30 Dec 2000 12:32:47 -0000 Received: (qmail 665 invoked from network); 30 Dec 2000 12:35:20 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 30 Dec 2000 12:35:20 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CL6X-00040C-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Dec 2000 12:27:21 +0000 Received: from rubellite.lion-access.net ([212.19.217.4]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CL6W-000407-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 12:27:20 +0000 Received: from w8k3f0 (1Cust88.tnt23.rtm1.nl.uu.net [213.116.140.88]) by rubellite.lion-access.net (I-Lab) with SMTP id 44A152FB4 for ; Sat, 30 Dec 2000 12:26:40 +0000 (GMT) Message-ID: <001501c07253$7cc04000$588c74d5@w8k3f0> From: "Dick Rollema" To: rsgb_lf_group@blacksheep.org References: <000f01c06e8b$c1529c20$72d01bd4@OK1FIG> Subject: LF: Re: New EasyGram Date: Sat, 30 Dec 2000 12:26:43 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: To All from PA0SE I tried to download EasyGram at several times during the day, evening, night and over the weekend. But the transmission was so awfully slow, sometimes nothing coming in during several minutes, that I gave up. I did not have that problem downloading other programs so I don't know what is wrong.. 73, Dick, PA0SE ----- Oorspronkelijk bericht ----- Van: Petr Maly Aan: RSGB LF GROUP Verzonden: maandag 25 december 2000 16:45 Onderwerp: LF: New EasyGram > Hi all > > I just uploaded a new version of EasyGram (1.20). What's new: > > 1. it enables to either terminate EasyGram or shut down the computer after > last screen shot is made (convenient for Eu stations for transatlantic > tests) > > 2. new buttons on Images page: "Save as" and "Rename" (screen shot) > > 3. GUI was reorganized so that the controlling window is even smaller and > "remembers" it's position after program is terminated > > 73, Petr OK1FIG > http://www.mujweb.cz/www/OK1FIG/136k.htm > > > > > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9172 invoked from network); 30 Dec 2000 12:15:05 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 30 Dec 2000 12:15:05 -0000 Received: (qmail 18164 invoked from network); 30 Dec 2000 12:18:19 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 30 Dec 2000 12:18:19 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CKrZ-0003wl-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Dec 2000 12:11:53 +0000 Received: from mta13-acc.tin.it ([212.216.176.44] helo=fep13-svc.tin.it) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CKrY-0003wg-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 12:11:53 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from mailsrv.dii.unisi.it ([213.45.252.164]) by fep13-svc.tin.it (InterMail vM.4.01.03.13 201-229-121-113) with ESMTP id <20001230121111.CPHJ433.fep13-svc.tin.it@mailsrv.dii.unisi.it> for ; Sat, 30 Dec 2000 13:11:11 +0100 Message-ID: <3A4DD0BD.1183F3FE@mailsrv.dii.unisi.it> Date: Sat, 30 Dec 2000 13:10:37 +0100 From: "valerio" X-Mailer: Mozilla 4.73 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: "Rsgb_Lf_Group" Subject: LF: G3XTZ Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello All, this morning 30/12/2000 at about 11:20 UTC received a QRSS signal from G3XTZ perfectly audible. I called him several time in fast CW but no response. I never received any signal from G3XTZ, so i missed a new QSO. Still no copy of VE1ZZ here. Happy new year to all and '73 Valerio (IK5ZPV) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12004 invoked from network); 30 Dec 2000 11:42:50 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 30 Dec 2000 11:42:50 -0000 Received: (qmail 29138 invoked from network); 30 Dec 2000 11:46:05 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 30 Dec 2000 11:46:05 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CKJC-0003my-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Dec 2000 11:36:22 +0000 Received: from mta02.talk21.com ([62.172.192.41] helo=t21mta02-app.talk21.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CKJ9-0003mt-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 11:36:19 +0000 Received: from dave ([62.7.189.216]) by t21mta02-app.talk21.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001230113300.KGMF17544.t21mta02-app.talk21.com@dave> for ; Sat, 30 Dec 2000 11:33:00 +0000 Message-ID: <001c01c07254$7d4272e0$d8bd073e@dave> From: "Dave Sergeant" To: rsgb_lf_group@blacksheep.org References: <000301c071ea$39cb88e0$89cb01d5@default> Subject: LF: Re: Ve1ZZ schedule Date: Sat, 30 Dec 2000 11:22:36 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Has any discussion been made for Jack to operate around our dawn period, say 0600-0700, which is probably the most favourable and consistent time (and a time when I am in the shack and not in bed...) 73s Dave G3YMC sergeantd@compuserve.com dsergeant@iee.org http://ourworld.compuserve.com/homepages/sergeantd From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13614 invoked from network); 30 Dec 2000 10:27:30 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 30 Dec 2000 10:27:30 -0000 Received: (qmail 13083 invoked from network); 30 Dec 2000 10:30:03 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 30 Dec 2000 10:30:03 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CJCH-0003ZT-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Dec 2000 10:25:09 +0000 Received: from mail6.svr.pol.co.uk ([195.92.193.212]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CJCG-0003ZO-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 10:25:08 +0000 Received: from modem-103.anfauglith.dialup.pol.co.uk ([62.136.110.103] helo=lvm) by mail6.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14CJC8-0006ut-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 10:25:00 +0000 Message-ID: <000c01c0724b$3eafdbc0$676e883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Argo Beta 1 Release. Date: Sat, 30 Dec 2000 10:27:48 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Alberto, Unloaded Argo Beta1 last night,very impressed,easy to use for both wideband watch and QRS. Very poor signal from VE1ZZ but made out several characters on the 3Sec. setting. Thanks and a Happy New Year to you and all on this reflector... Laurie. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4461 invoked from network); 30 Dec 2000 10:20:53 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 30 Dec 2000 10:20:53 -0000 Received: (qmail 2997 invoked from network); 30 Dec 2000 10:24:07 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 30 Dec 2000 10:24:07 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CJ64-0003Wn-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Dec 2000 10:18:44 +0000 Received: from anchor-post-31.mail.demon.net ([194.217.242.89]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CJ61-0003Wi-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 10:18:41 +0000 Received: from alg.demon.co.uk ([194.222.171.80]) by anchor-post-31.mail.demon.net with esmtp (Exim 2.12 #1) id 14CJ5s-0008UP-0V for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 10:18:33 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A4DB6C1.EC3B1B01@alg.demon.co.uk> Date: Sat, 30 Dec 2000 10:19:45 +0000 From: "Steve Rawlings" X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win98; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: GW4ALG QRV tonight References: <3A4CBD40.62172391@alg.demon.co.uk> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi All, I managed to get the helium-filled balloons up to 27 m last night (Friday) from my small garden, and had good QSOs with Dave GM3YXM/P (New Galloway); Wolf DF0WD; and Werner ON6ND. I also heard Wil PA0BWL; Rik ON7YD (- sorry for any QRM, Rik); Graham G3XTZ; and Peter G3LDO. I didn't quite manage to complete a QSO with Andy F6CNI at 21:20 (I didn't receive my report). But his signal was fully readable one hour later when working Peter G3LDO. Unfortunately the breeze came up and I had to dismantle the antenna system at about 22:30. If possible, I'll get the balloons up again tonight (Saturday). Regards to all, Steve GW4ALG From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20609 invoked from network); 30 Dec 2000 07:49:28 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 30 Dec 2000 07:49:28 -0000 Received: (qmail 15913 invoked from network); 30 Dec 2000 07:52:42 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 30 Dec 2000 07:52:42 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14CGfB-00031M-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Dec 2000 07:42:49 +0000 Received: from hs-img-2.compuserve.com ([149.174.177.151] helo=sphmgaab.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14CGfA-00031H-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 07:42:48 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by sphmgaab.compuserve.com (8.9.3/8.9.3/SUN-1.9) id CAA16572 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 02:42:39 -0500 (EST) Date: Sat, 30 Dec 2000 02:42:31 -0500 From: "'Geri' Kinzel, DK8KW" Subject: Re: LF: VE1ZZ only 'T' in DL To: rsgb_lf_group@blacksheep.org Message-ID: <200012300242_MC2-C010-C5D0@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Group, traces of Jack's signal were barely detectable at 01.00 UTC ('T'), nil throughout the rest of the night. Someone seemed to have tried to answer at 01.06, saw someone tuning and the letters "ax" in QRSS. Noise conditions were quit, all Loran lines clearly visible. Best 73 Geri, DK8KW (W1KW) P.S.: John, VE1ZJ, thank you for your QSP to Jack! From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18603 invoked from network); 30 Dec 2000 00:16:41 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 30 Dec 2000 00:16:41 -0000 Received: (qmail 13780 invoked from network); 30 Dec 2000 00:19:15 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 30 Dec 2000 00:19:15 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14C9dN-0001TG-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Dec 2000 00:12:29 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14C9dM-0001TB-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Dec 2000 00:12:28 +0000 Received: from central.zetnet.co.uk (central.zetnet.co.uk [194.247.47.20]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id AAA11816 for ; Sat, 30 Dec 2000 00:12:19 GMT X-ZSender: g3ldo@zetnet.co.uk Message-ID: <2000123000252368199@zetnet.co.uk> Date: Sat, 30 Dec 2000 00:25:23 GMT To: rsgb_lf_group@blacksheep.org From: "Peter Dodd" X-Mailer: ZIMACS Version 1.20c 10000836 Subject: Re: LF: VE1ZZ Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit VE1ZZ peaked to R 'O' at 2335 and again at 0001 R 'M' I have three adjacent Loran lines, one just below 136.50 and the other two at 136.504 and 136.505 respectively; so the VE1ZZ signal at 136.502 is nicely in the clear. F6CNI very active tonight and is on as I write 0010 -- Regards, Peter, G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11315 invoked from network); 29 Dec 2000 23:03:10 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 29 Dec 2000 23:03:10 -0000 Received: (qmail 2383 invoked from network); 29 Dec 2000 23:05:44 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 29 Dec 2000 23:05:44 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14C8S3-00016R-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Dec 2000 22:56:43 +0000 Received: from rhenium.btinternet.com ([194.73.73.93] helo=rhenium) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14C8S1-00016L-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 22:56:42 +0000 Received: from [213.1.203.137] (helo=default) by rhenium with smtp (Exim 3.03 #83) id 14C8Rt-0007Q3-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 22:56:33 +0000 Message-ID: <000c01c071ea$9f37e3e0$89cb01d5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: Ve1ZZ schedule Date: Fri, 29 Dec 2000 22:53:14 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Jack declared 2100, 2130, 2200, 2230, 2300z tonight.....sorry I missed the posting I wasn't expecting so early a start. The usual 10 minutes of transmission starting at those times.....and maybe continuing, he finally went qrt at 2230 the other night. Good Luck de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8966 invoked from network); 29 Dec 2000 23:00:41 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 29 Dec 2000 23:00:41 -0000 Received: (qmail 28779 invoked from network); 29 Dec 2000 23:03:15 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 29 Dec 2000 23:03:15 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14C8PI-000142-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Dec 2000 22:53:52 +0000 Received: from carbon.btinternet.com ([194.73.73.92]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14C8PH-00013x-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 22:53:51 +0000 Received: from [213.1.203.137] (helo=default) by carbon.btinternet.com with smtp (Exim 3.03 #83) id 14C8P9-0001CK-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 22:53:43 +0000 Message-ID: <000301c071ea$39cb88e0$89cb01d5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: Ve1ZZ schedule Date: Fri, 29 Dec 2000 22:53:14 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Jack declared 2100, 2130, 2200, 2230, 2300z tonight.....sorry I missed the posting I wasn't expecting so early a start. The usual 10 minutes of transmission starting at those times.....and maybe continuing, he finally went qrt at 2230 the other night. Good Luck de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20130 invoked from network); 29 Dec 2000 22:56:19 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 29 Dec 2000 22:56:19 -0000 Received: (qmail 14083 invoked from network); 29 Dec 2000 22:51:07 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 29 Dec 2000 22:51:07 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14C8Bx-00012a-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Dec 2000 22:40:05 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from d06lmsgate-2.uk.ibm.com ([195.212.29.2]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14C8Bt-000128-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 22:40:01 +0000 Received: from d06relay02.portsmouth.uk.ibm.com (d06relay02.portsmouth.uk.ibm.com [9.166.84.148]) by d06lmsgate-2.uk.ibm.com (1.0.0) with ESMTP id WAA130052 for ; Fri, 29 Dec 2000 22:25:22 GMT X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (ss7.bld.socks.ibm.com [9.14.4.72]) by d06relay02.portsmouth.uk.ibm.com (8.8.8m3/NCO v4.95) with ESMTP id WAA149426 for ; Fri, 29 Dec 2000 22:39:20 GMT Message-ID: <3A4D1286.F3B7C48F@usa.net> Date: Fri, 29 Dec 2000 23:39:02 +0100 From: "Alberto di Bene" Organization: Undisclosed X-Mailer: Mozilla 4.76 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Ideas for a Slow CW-Viewer References: <50.f61cb99.277df99c@aol.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: DL4YHF@aol.com wrote: > Hello Alberto and Group, > > I have some ideas for a 'Slow-CW-Viewer' (some of them have been implemented > in Spectrum Lab, others in Spectran, others not at all...) > How about this : > [snip] Wolf and the group, thanks for your contribution. Some of your ideas are quite acceptable, and I will implement them, some others, like the dB scale and the grid, perhaps are more suited, IMHO, for general purpose programs, like your fine SpecLab, and less for a specific viewer for QRSS and DFCW. About the saving of the FFT bins to a file for a later post-processing, that's a very good idea. As you said, a common format would be very desirable. I will give a thought to this, and perhaps will come out with a first skeleton for the format. 73 and Happy New Millennium to everybody Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16348 invoked from network); 29 Dec 2000 17:44:20 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 29 Dec 2000 17:44:20 -0000 Received: (qmail 17418 invoked from network); 29 Dec 2000 17:46:52 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 29 Dec 2000 17:46:52 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14C3Vq-0008UX-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Dec 2000 17:40:18 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from d06lmsgate-3.uk.ibm.com ([195.212.29.3]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14C3Vp-0008U5-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 17:40:17 +0000 Received: from d06relay01.portsmouth.uk.ibm.com (d06relay01.portsmouth.uk.ibm.com [9.166.84.147]) by d06lmsgate-3.uk.ibm.com (1.0.0) with ESMTP id RAA212022 for ; Fri, 29 Dec 2000 17:31:10 GMT X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (ss7.bld.socks.ibm.com [9.14.4.72]) by d06relay01.portsmouth.uk.ibm.com (8.8.8m3/NCO v4.95) with ESMTP id RAA99110 for ; Fri, 29 Dec 2000 17:39:35 GMT Message-ID: <3A4CCC46.F6F923C2@usa.net> Date: Fri, 29 Dec 2000 18:39:19 +0100 From: "Alberto di Bene" Organization: Undisclosed X-Mailer: Mozilla 4.76 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: Argo beta 1 released References: <50.f61cb99.277df99c@aol.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I have just uploaded Argo beta 1, a QRSS/DFCW viewer. You can download it from http://www.qsl.net/i2phd/argo Please test it and give your impressions, suggestions, critics, etc. It won't touch in any way your Windows mixer, so those who were scared by the first build of Spectran beta 4 can rest assured that no harms will be done to their PCs. The current presets are only tentative, and can be changed following your suggestions. Waiting for your feedback, Alberto I2PHD P.S. The package contains a readme with all the instructions. Please read it. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15651 invoked from network); 29 Dec 2000 17:24:45 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 29 Dec 2000 17:24:45 -0000 Received: (qmail 27011 invoked from network); 29 Dec 2000 17:27:57 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 29 Dec 2000 17:27:57 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14C3EZ-0008Oc-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Dec 2000 17:22:27 +0000 Received: from ewey-rwcmta.excite.com ([198.3.99.191] helo=ewey.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14C3EX-0008OX-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 17:22:26 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by ewey.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001229172137.OCOV24504.ewey.excite.com@almond.excite.com> for ; Fri, 29 Dec 2000 09:21:37 -0800 Message-ID: <12019413.978110497011.JavaMail.imail@almond.excite.com> Date: Fri, 29 Dec 2000 09:21:33 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: LF: VE1ZZ and DCF spurious MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 62.253.64.5 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Markus, I notice that if one adds the frequency of DCF42 to the line frequencies that are causing you problems, the resultant frequencies are very close to the broadcast station "Radioropa" at Burg. Perhaps it has some secondary modulation. Could this be the problem? If so an LPF might help. If you are sure that it is DCF49/42 please explain how you think the spur frequencies might be derived. I would like to learn a little more. Happy New Year, John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1238 invoked from network); 29 Dec 2000 16:36:33 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 29 Dec 2000 16:36:33 -0000 Received: (qmail 19552 invoked from network); 29 Dec 2000 16:39:45 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 29 Dec 2000 16:39:45 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14C2Tr-0008Da-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Dec 2000 16:34:11 +0000 Received: from anchor-post-30.mail.demon.net ([194.217.242.88]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14C2Tq-0008DV-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 16:34:10 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from alg.demon.co.uk ([194.222.171.80]) by anchor-post-30.mail.demon.net with esmtp (Exim 2.12 #1) id 14C2Ti-000Ia9-0U for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 16:34:02 +0000 Message-ID: <3A4CBD40.62172391@alg.demon.co.uk> Date: Fri, 29 Dec 2000 16:35:12 +0000 From: "Steve Rawlings" X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win98; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: "LF Group" Subject: LF: GW4ALG QRV tonight Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: The air in Chepstow is cold and still, so I will try to get my balloons flying tonight (20:00 - 23:00 UTC)- perhaps to 27 m. Skeds welcome. Contact me if you would prefer a sked 05:00 - 07:00 tomorrow (Saturday). Regards to all, Steve GW4ALG Mobile: 07977 265060 (+44 7977 265060) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6658 invoked from network); 29 Dec 2000 14:33:44 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 29 Dec 2000 14:33:44 -0000 Received: (qmail 10003 invoked from network); 29 Dec 2000 14:36:56 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 29 Dec 2000 14:36:56 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14C0XJ-0007ng-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Dec 2000 14:29:37 +0000 Received: from imo-r14.mx.aol.com ([152.163.225.68] helo=imo-r14.mail.aol.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14C0XF-0007nb-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 14:29:34 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from DL4YHF@aol.com by imo-r14.mx.aol.com (mail_out_v28.35.) id l.50.f61cb99 (3994) for ; Fri, 29 Dec 2000 09:28:45 -0500 (EST) From: DL4YHF@aol.com Message-ID: <50.f61cb99.277df99c@aol.com> Date: Fri, 29 Dec 2000 09:28:44 EST Subject: LF: Re: Ideas for a Slow CW-Viewer To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: AOL 4.0.i for Windows 95 sub 69 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Alberto and Group, I have some ideas for a 'Slow-CW-Viewer' (some of them have been implemented in Spectrum Lab, others in Spectran, others not at all...) How about this : - adjustable 'color brightness' and 'contrast' with scrollbars for post-processing - a 'time scroller' for the waterfall, optionally 'time labels' every (N) seconds - a frequency and time grid for the waterfall - a simple 'ASCII-export' feature similar to the ECLIPSE software - a feature to ADD or SUBTRACT the audio frequency from the receiver's 'zero beat' frequency so we could have a waterfall with 'absolute' frequency scale (for example, RX VFO set to 137.2kHz, audio frequency 507 Hz, display for the waterfall's marker = 137.707 kHz). The RX VFO frequency could be entered in an edit control or (if someone got enough time to implement it) could be read from the RX via serial interface. An other point to think about is introducing a 'file format' to save spectral data. Such a file could contain FFT bins along with additional information, like : - date+time of the reception, - bandwith and resolution of the FFT bins, - exact VFO frequency and LSB/USB information from time of reception - a few lines of plain text for comments, antenna description, location etc. The file format (and/or the source code) should be published for all authors of FFT-DSP software. These files could be spread via the reflector and be loaded into the new 'viewer' for displaying, scrolling, zooming and other ways of post-processing). Though handling such a file wouldn't be as easy as sharing graphic 'waterfall' files, it offers flexibility for future analysis (beacon observation, signal/noise analysis, extraction of 'propagation data' etc). Just an idea -- hw ? By the way: The complete sourcecode of SpectrumLab is available at www.qsl.net/dl4yhf, if you want to take a look at them (written in C++). 73's and all the best for 2001 from Wolf, DL4YHF. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29493 invoked from network); 29 Dec 2000 13:20:06 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 29 Dec 2000 13:20:06 -0000 Received: (qmail 23400 invoked from network); 29 Dec 2000 13:23:19 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 29 Dec 2000 13:23:19 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BzN2-0007Y3-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Dec 2000 13:14:56 +0000 Received: from hs-img-2.compuserve.com ([149.174.177.151] helo=sphmgaab.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BzN0-0007Xx-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 13:14:55 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by sphmgaab.compuserve.com (8.9.3/8.9.3/SUN-1.9) id IAA25322 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 08:14:37 -0500 (EST) Date: Fri, 29 Dec 2000 08:13:54 -0500 From: "'Geri' Kinzel, DK8KW" Subject: LF: Slow-Voice To: rsgb_lf_group@blacksheep.org Message-ID: <200012290813_MC2-C018-B973@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello folks, Markus and I ran also a slow-voice test this morning. Considering tha fact that Markus' signal is only a few dB above the noise so that even his PSK31 signal did not make it 100% error-free, it was surprising to hear a human voice far far away after doing some post-procesing with Cool Edit 2000 (slowing down to 1/4 speed, raising the pitch). My XYL Andrea and I listened to the voice several times and were able to read the words "Delta Foxtrott Number Six November Mike" through the noise. It reminded me a little bit of a story I have seen on TV a while ago, where people try to listen to voices of those who passed away using all kinds of electronic equipment ... But as I said, it is surprising that the voice made with 500 Hz bandwidth! I am also preparing a test file now and will try to push it over to Markus. Mybe it is even worth to slow down the speed by 8 times to be able to make use of 250 Hz CW filters! Best 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5799 invoked from network); 29 Dec 2000 12:53:46 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 29 Dec 2000 12:53:46 -0000 Received: (qmail 16869 invoked from network); 29 Dec 2000 12:56:18 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 29 Dec 2000 12:56:18 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Byy1-0007QK-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Dec 2000 12:49:05 +0000 Received: from jubilee.ns.sympatico.ca ([142.177.1.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Byxz-0007QF-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 12:49:04 +0000 Received: from ns.sympatico.ca ([142.177.105.23]) by jubilee.ns.sympatico.ca (Post.Office MTA v3.5.2 release 221 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Fri, 29 Dec 2000 08:48:47 -0400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A4CCEA6.B543CD44@ns.sympatico.ca> Date: Fri, 29 Dec 2000 12:49:26 -0500 From: "John Currie" X-Mailer: Mozilla 4.7 [en]C-DIAL (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: VE1ZZ 'M' at 0040z in Germany ( References: <200012282346_MC2-C002-A86B@compuserve.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Geri I have been passing your reception reports to Jack , VE1ZZ and will give your wishes 73 John VE1ZJ "'Geri' Kinzel, DK8KW" wrote: > Hello all, > > VE1ZZ signal report from Germany (December 28/29, 2000)_ > > - nothing before midnight > - traces can be seen on the 00.00 transmission ('T') > - clearly identifyable signal at 00.40, fading out at 01.58 ('M') > - no traces of later transmissions this night > > - at 01.28 my EasyGram switched automatically to a much lower resolution, > this happens to me every night randomly after the program has been run for > a while. Anybody else got this problem? When I re-start everything is back > to normal. > > The noise level was acceptably low, I could see all Loran-lines clearly. > > If someone talks to Jack or sends him a report any other way, please pass > him my best regards (can he be reached through packet radio? Does anyone > have his mailbox address?). > > Best 73 > > Geri, DK8KW (W1KW) > > P.S.: I am also looking for Jack's QTH locator. I found an assumption of it > being FN84CW somewehre on the internet. If this is true, the distance > between him and me is 5278 km. Not beating OK1FIG/VE1ZJ's world record > (actually just missing it by a couple of dozen kilometers), but it might be > Jack's personnel best QRB. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13022 invoked from network); 29 Dec 2000 11:55:29 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 29 Dec 2000 11:55:29 -0000 Received: (qmail 13324 invoked from network); 29 Dec 2000 11:58:41 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 29 Dec 2000 11:58:41 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14By1I-0007BF-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Dec 2000 11:48:24 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from imo-r09.mx.aol.com ([152.163.225.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14By1G-0007BA-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 11:48:23 +0000 Received: from MarkusVester@aol.com by imo-r09.mx.aol.com (mail_out_v28.35.) id l.7b.e39a038 (4424) for ; Fri, 29 Dec 2000 06:47:37 -0500 (EST) From: MarkusVester@aol.com Message-ID: <7b.e39a038.277dd3d9@aol.com> Date: Fri, 29 Dec 2000 06:47:37 EST Subject: LF: G4JNT's Hell seen in Bavaria To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="------------070306030907000203020007" X-Mailer: AOL 4.0.i for Windows 95 sub 70 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: This is a multi-part message in MIME format. --------------070306030907000203020007 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit Dear Andy and LF Group, as expected, the 10 Hz Hell was superior to 20 Hz. The best image resulted from a resolution bandwidth optimized to the short pixel duration and fast scanning with no averaging (1.4 Hz, 250 ms). In the PaintShop "postprocessing", I simply blanked the noise-only intervals before compressing horizontally, so the maximum SNR for a given transmitted energy should be recovered. A 29 kB gif file describing this procedure can be sent directly. Thank you Andy for this interesting experiment. Does the _BCN mean beacon? vy 73 de Markus DF6NM, JN59NK ________________________________________________________ Markus Vester wrote: Hi Andy, just a quick response: yes, hell clearly is there, abt -5 dBuV/m now, but hardly readable. I can easily see the vertical lines chirping downward, but the horizontal dots are difficult. I tried several spectrogram settings, 0.7 Hz / 500 ms seemed best for SNR (see gif). Averaging would probaby be better in connecting the parts of a character, but it smears out the dots so they get lost in the noise. The signal can't be everywhere at the same time. Theoretically, one would wish for a sliding bandpass synchronous to the chirps, which would block the noise in between. I will experiment with more settings on the recorded wav files later. I'll try to call you in DFCW, and maybe you could also send narrower bandwidth hell. 73 de Markus --------------070306030907000203020007 Content-Type: image/gif; name="HELL_JNT.GIF" Content-Transfer-Encoding: base64 Content-Disposition: inline; filename="HELL_JNT.GIF" R0lGODdhfwAdAPcAAAAAAAEBAQICAgMDAwQEBAUFBQYGBgcHBwgICAkJCQoKCgsLCwwMDA0N DQ4ODg8PDxAQEBERERISEhMTExQUFBUVFRYWFhcXFxgYGBkZGRoaGhsbGxwcHB0dHR4eHh8f HyAgICEhISIiIiMjIyQkJCUlJSYmJicnJygoKCkpKSoqKisrKywsLC0tLS4uLi8vLzAwMDEx MTIyMjMzMzQ0NDU1NTY2Njc3Nzg4ODk5OTo6Ojs7Ozw8PD09PT4+Pj8/P0BAQEFBQUJCQkND Q0REREVFRUZGRkdHR0hISElJSUpKSktLS0xMTE1NTU5OTk9PT1BQUFFRUVJSUlNTU1RUVFVV VVZWVldXV1hYWFlZWVpaWltbW1xcXF1dXV5eXl9fX2BgYGFhYWJiYmNjY2RkZGVlZWZmZmdn Z2hoaGlpaWpqamtra2xsbG1tbW5ubm9vb3BwcHFxcXJycnNzc3R0dHV1dXZ2dnd3d3h4eHl5 eXp6ent7e3x8fH19fX5+fn9/f4CAgIGBgYKCgoODg4SEhIWFhYaGhoeHh4iIiImJiYqKiouL i4yMjI2NjY6Ojo+Pj5CQkJGRkZKSkpOTk5SUlJWVlZaWlpeXl5iYmJmZmZqampubm5ycnJ2d nZ6enp+fn6CgoKGhoaKioqOjo6SkpKWlpaampqenp6ioqKmpqaqqqqurq6ysrK2tra6urq+v 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OsAtHmEEXVA8+yIEvREEP7UDPzqKNVCbuDEETrBGKLACktExayWbVwAHm7YCbEFxJHCckuFT IkIm/hN5Iz8wA1NSS+JigXAgBU06H5MxQ0UwJQtGkzlBA7XpAy7QcymQFTASAwblQkyqAzmg BGSwCQR6AjggYfRxkTIQBXUwB0kUcDOAQE9gBUkABC6wj8l5ZQ9DiTvAAifwjI1RQPI0VWu0 EHJjjzqwEAikjm7ETq1SB2OAT/iXMURQQRaRBK02RkIAI0ADQRglBVLQMy/QTDKQAv24Khtz ckWQdkVAe12BpQRaAjSwBDy2KzaQA9EiBDTAArUKlM7RVnRjM8NkUk2woDIwjAm4FjqQq3JE BVOgOsxDqhI0AyyQof0BBD4wA7GjIvzkBFogB2BgKMk3KUpUqmq0MLlD/gOuikDR8602sCqj oxVZMRi00haFcTBX4AagQKAiQANOoJ+7tnQtoCsykBVCcAVdEH7GklJacAVss0NE1QIcIQIn EKI2EI4uZEc9GVJzUwNACXsXVxk7UFZH4Fv4KhdXQAdkcAVR8AVRYARz8gJylK3hEpxvlCg4 MAV04G9mslaYBgVKcAP1MQNUCqNScAVgsAaNIAmvQKAqMARkEAdjsAViwwLaU6U+IwQV4QT9 IybaYxZTEH5Ogi0lIAIf2atwIAZKADIfeVFcwX1X8CDcFAXkJ5zasqrRUgaG8FRfcAb99AKk oUQfokRMYAZkoHQjsgNVUAdlsJcHUo5AgK9BEhBDzlKT1OMEbSAKo0ALBBoQAAA7 --------------070306030907000203020007-- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1659 invoked from network); 29 Dec 2000 11:17:11 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 29 Dec 2000 11:17:11 -0000 Received: (qmail 28358 invoked from network); 29 Dec 2000 11:19:43 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 29 Dec 2000 11:19:43 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BxPV-00074C-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Dec 2000 11:09:21 +0000 Received: from hugo.fen-net.de ([194.95.193.10] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BxPU-000747-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 11:09:20 +0000 Received: from 194.95.193.10.fen.baynet.de (dialin-nbg-232.fen-net.de [195.37.215.112]) by hugo.fen-net.de (8.9.1/8.9.1) with SMTP id MAA14985 for ; Fri, 29 Dec 2000 12:04:19 +0100 (MET) Message-ID: <000501c06df3$e84cc640$70d725c3@194.95.193.10.fen.baynet.de> From: "Walter Staubach" To: "Reflektor" Subject: LF: Slow-Voice and PSK Date: Sun, 24 Dec 2000 22:52:14 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hallo to All, received Markus, DF6NM, yesterday in the evening with slow-voice. The time was stretched 4 times, the bandwidth reduced to around 500Hz, but I used SSB-USB. This morning at 9.45 UTC received him again, but now through the 500Hz-filter. Yes, it is his voice! Unbelievable. Also heard both, Markus and Geri, in PSK31 - no Problem, good copy. All the best for 2001. 73 Walter DJ2LF --------------------------------------------- Walter.Staubach@fen-net.de From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1226 invoked from network); 29 Dec 2000 09:25:04 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 29 Dec 2000 09:25:04 -0000 Received: (qmail 28551 invoked from network); 29 Dec 2000 09:28:17 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 29 Dec 2000 09:28:17 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BvhP-0006i1-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Dec 2000 09:19:43 +0000 Received: from ulexite.lion-access.net ([212.19.217.2]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BvhO-0006hw-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 09:19:42 +0000 Received: from w8k3f0 (1Cust134.tnt4.rtm1.nl.uu.net [213.116.102.134]) by ulexite.lion-access.net (I-Lab) with SMTP id 304ECFB031 for ; Fri, 29 Dec 2000 08:19:11 -0100 (GMT) Message-ID: <001001c07170$2144b280$866674d5@w8k3f0> From: "Dick Rollema" To: "LF-Group" Subject: LF: MB2HFC power Date: Fri, 29 Dec 2000 09:03:57 +0100 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
To All from PA0SE
 
Dave, G3YXM, writes in his LF column of RadCom of January 2001 that I measured the power of special event station MB2HFC at Old Windsor at about 750mW EIRP. That is not correct, it was about 450mW EIRP (823mW ERP). 
The measurement team consisted of three nationalities. David, G0MRF, provided transport; Geri, DK8KW, determined the distance from the transmitter with his GPS receiver and PA0SE operated his portable homemade field strength meter. A description of the instrument can be found on the web sites of G3YXM and the LWCA.
 
73, Dick, PA0SE
JO22GD 
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24814 invoked from network); 29 Dec 2000 04:55:07 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 29 Dec 2000 04:55:07 -0000 Received: (qmail 2471 invoked from network); 29 Dec 2000 04:57:39 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 29 Dec 2000 04:57:39 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BrRU-0005oF-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Dec 2000 04:47:00 +0000 Received: from ds-img-3.compuserve.com ([149.174.206.136] helo=spdmgaac.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BrRS-0005oA-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 04:46:58 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by spdmgaac.compuserve.com (8.9.3/8.9.3/SUN-1.9) id XAA03946 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 23:46:20 -0500 (EST) Date: Thu, 28 Dec 2000 23:46:00 -0500 From: "'Geri' Kinzel, DK8KW" Subject: LF: VE1ZZ 'M' at 0040z in Germany ( To: rsgb_lf_group@blacksheep.org Message-ID: <200012282346_MC2-C002-A86B@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello all, VE1ZZ signal report from Germany (December 28/29, 2000)_ - nothing before midnight - traces can be seen on the 00.00 transmission ('T') - clearly identifyable signal at 00.40, fading out at 01.58 ('M') - no traces of later transmissions this night - at 01.28 my EasyGram switched automatically to a much lower resolution, this happens to me every night randomly after the program has been run for a while. Anybody else got this problem? When I re-start everything is back to normal. The noise level was acceptably low, I could see all Loran-lines clearly. If someone talks to Jack or sends him a report any other way, please pass him my best regards (can he be reached through packet radio? Does anyone have his mailbox address?). Best 73 Geri, DK8KW (W1KW) P.S.: I am also looking for Jack's QTH locator. I found an assumption of it being FN84CW somewehre on the internet. If this is true, the distance between him and me is 5278 km. Not beating OK1FIG/VE1ZJ's world record (actually just missing it by a couple of dozen kilometers), but it might be Jack's personnel best QRB. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2047 invoked from network); 29 Dec 2000 01:33:36 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by excalibur.plus.net with SMTP; 29 Dec 2000 01:33:36 -0000 Received: (qmail 22251 invoked from network); 29 Dec 2000 01:28:15 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 29 Dec 2000 01:28:15 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BoG1-00050k-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Dec 2000 01:22:57 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from d06lmsgate-2.uk.ibm.com ([195.212.29.2]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BoFz-00050f-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 01:22:55 +0000 Received: from d06relay02.portsmouth.uk.ibm.com (d06relay02.portsmouth.uk.ibm.com [9.166.84.148]) by d06lmsgate-2.uk.ibm.com (1.0.0) with ESMTP id BAA162254 for ; Fri, 29 Dec 2000 01:08:12 GMT X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (ss7.bld.socks.ibm.com [9.14.4.72]) by d06relay02.portsmouth.uk.ibm.com (8.8.8m3/NCO v4.95) with ESMTP id BAA13478 for ; Fri, 29 Dec 2000 01:22:09 GMT Message-ID: <3A4BE735.A97EEC6E@usa.net> Date: Fri, 29 Dec 2000 02:21:57 +0100 From: "Alberto di Bene" Organization: Undisclosed X-Mailer: Mozilla 4.76 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: Re: QRSS question References: <000c01c070df$f218bfa0$0c8d01d4@g4jnt> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Andrew Talbot wrote: > How about letting it go slow enough for a 30s dot or a resolution bandwidth > of 0.01Hz - as far as I know the only soundcard software that could get > anywhere near this and do proper SLOWCW was Spectran. > > None of this fast 3s dot stuff ! My 56002 EVM system can get down to 1 > hour dot intervals, looking in a bandwidth of 100 uHz (micro Hz). That > would span the Altantic with 1mW ERP if present records are anything to go > by. Pitgy it would take several days for a proper QSO !!!!!!! :-( > > Andy G4JNT > Andy, thanks for the suggestion, which I have implemented this evening. Summing up, at present the supported modes are : - Full Band View, a span of 1.5 kHz - 3 sec/dot, the screen is refreshed 5 times per second, with 0.34 Hz resolution. - 10 sec/dot, the screen is refreshed 2 times per second, with 0.08 Hz resolution. - 30 sec/dot, the screen is refreshed every 1.5 seconds, with 0.021 Hz resolution. About your micro Hz resolution, it can be done also with a PC, the fastest Pentiums nowadays process a FFT butterfly in a shorter time than the 56002 DSP. But, as you rightly pointed out, the problem lies in that reciprocal relationship between F and T ..... 73 Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9533 invoked from network); 29 Dec 2000 01:05:11 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by extortion.plus.net with SMTP; 29 Dec 2000 01:05:11 -0000 Received: (qmail 29127 invoked from network); 29 Dec 2000 01:07:34 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 29 Dec 2000 01:07:34 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Bnsa-0004vA-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Dec 2000 00:58:44 +0000 Received: from [194.73.73.176] (helo=protactinium) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BnsZ-0004v5-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 00:58:43 +0000 Received: from [62.7.42.70] (helo=default) by protactinium with smtp (Exim 3.03 #83) id 14BnsQ-0001Br-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 00:58:35 +0000 Message-ID: <000401c07132$868f0fc0$462a073e@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: VE1zz and the DX Cluster Date: Fri, 29 Dec 2000 00:58:13 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Jack transmitted again at 0040z and will be on at 0100z QRSS. I have received an acknowledgement from him of my report on his 2400z transmission through the local cluster node. So the spots do travel that way as well! I listened hard using 300Hz IF filter and 80Hz external audio filter, but I could not detect an audible signal from Jack during the QRSS transmission. He was about 12-15dB aboove the bacground noise but only about 6dB stronger than the line about 2Hz higher up the band. Cheers de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16895 invoked from network); 29 Dec 2000 00:22:41 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by excalibur.plus.net with SMTP; 29 Dec 2000 00:22:41 -0000 Received: (qmail 22930 invoked from network); 29 Dec 2000 00:17:21 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 29 Dec 2000 00:17:21 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Bn4f-0004iF-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Dec 2000 00:07:09 +0000 Received: from rhenium.btinternet.com ([194.73.73.93] helo=rhenium) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Bn4e-0004iA-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 00:07:08 +0000 Received: from [213.1.200.6] (helo=default) by rhenium with smtp (Exim 3.03 #83) id 14Bn4V-000242-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Dec 2000 00:06:59 +0000 Message-ID: <000401c0712b$50da7380$06c801d5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: VE1ZZ 'O' at 2400z Date: Fri, 29 Dec 2000 00:06:33 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all Jack VE1ZZ was not seen at 2300z or 2330z but came up with a nice clear signal at 2400z again. Cheers de Alan G3NYK JO02PB Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11052 invoked from network); 28 Dec 2000 23:39:05 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by 10.226.25.101 with SMTP; 28 Dec 2000 23:39:05 -0000 Received: (qmail 2542 invoked from network); 28 Dec 2000 23:42:09 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 28 Dec 2000 23:42:09 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BmVl-0004VK-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 23:31:05 +0000 Received: from imo-d08.mx.aol.com ([205.188.157.40]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BmVk-0004VF-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 23:31:04 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from MarkusVester@aol.com by imo-d08.mx.aol.com (mail_out_v28.35.) id l.a6.df5148b (3888) for ; Thu, 28 Dec 2000 18:27:39 -0500 (EST) From: MarkusVester@aol.com Message-ID: Date: Thu, 28 Dec 2000 18:27:39 EST Subject: LF: VE1ZZ and DCF spurious To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: AOL 4.0.i for Windows 95 sub 70 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello group, the spurious line interfering with possible VE1ZZ reception here seems to emanate from the DCF49/42 transmitter pair near Frankfurt. Due to proximity and azimuth they will be hard to avoid in this part of Germany. freq FS +136 @160km kHz dBuV/m .548 +1 (central line in a set of spurs) .537 -17 .525 <-20 .514 -19 .506 <-20 .505 <-20 .503 -9 (the annoying one) .500 <-20 .495 <-20 .491 -15 .487 <-20 The background noise at noon was about -24 dBuV/m in 0.45 Hz bandwidth. In darkness, the small spurs <-20dB were covered by noise. Regards Markus, DF6NM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29355 invoked from network); 28 Dec 2000 23:27:38 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by 10.226.25.101 with SMTP; 28 Dec 2000 23:27:38 -0000 Received: (qmail 12069 invoked from network); 28 Dec 2000 22:30:42 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 28 Dec 2000 22:30:42 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BlOL-0004DJ-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 22:19:21 +0000 Received: from mailman.zeta.org.au ([203.26.10.16]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BlOH-0004DE-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 22:19:20 +0000 Received: from steve (ppp141.dyn154.pacific.net.au [210.23.154.141]) by mailman.zeta.org.au (8.9.3/8.8.7) with SMTP id JAA02254 for ; Fri, 29 Dec 2000 09:18:58 +1100 Message-ID: <021701c0711c$74656940$0301a8c0@steve> From: "Steve Olney" To: rsgb_lf_group@blacksheep.org References: <000701c06fd0$865d0e20$291478d5@dave> Subject: LF: Re: re:e-groups Date: Fri, 29 Dec 2000 09:09:33 +1100 MIME-Version: 1.0 Content-Type: text/plain; charset=Windows-1252; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: G'day Dave, I checked. There were only comments and experiences related - no "criticism" - that is, until you mentioned it. >For most of us it matters little whether the message is delivered in > 30 seconds or 5 minutes and we should by no means criticise the service offered. Merry Xmas 73s Steve Olney (VK2ZTO/AXSO - QF56IK : Lat -33 34 07, Long +150 44 40) ============================================= HomePage URLs: http://www.qsl.net/vk2zto http://www.zeta.org.au/~ollaneg Containing:- ULF, ELF, VLF & LF Experimentation InfraSonic Experimentation Laser Comms DX Amateur Radio Astronomy ============================================= From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28382 invoked from network); 28 Dec 2000 21:14:07 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 28 Dec 2000 21:14:07 -0000 Received: (qmail 2834 invoked from network); 28 Dec 2000 21:17:20 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Dec 2000 21:17:20 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BkJk-0003xY-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 21:10:32 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BkJj-0003xT-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 21:10:31 +0000 Received: from central.zetnet.co.uk (central.zetnet.co.uk [194.247.47.20]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id VAA04439 for ; Thu, 28 Dec 2000 21:10:23 GMT X-ZSender: g3ldo@zetnet.co.uk Message-ID: <2000122821160268199@zetnet.co.uk> Date: Thu, 28 Dec 2000 21:16:02 GMT To: rsgb_lf_group@blacksheep.org From: "Peter Dodd" X-Mailer: ZIMACS Version 1.20c 10000836 Subject: LF: Re: Misc Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Hello all. I have been receiving VE1ZZ most evenings (2300 - 0030) but he is only readability 'O' over very short periods during the beacon transmissions. QRN levels been very high although they seem a bit better tonight (2100). A general description of our LF activities, using computer FFT programs to read very weak signals was given by Arnie Corro, CO2KK, on Radio Havana last Saturday. Radio Havana broadcasts 'CQ DX Unlimited' in English after the news every Wenesday and Saturday at 2100UTC on 13750kHz (AM). Signal strength been very good in Europe in the last couple of months, peaking S9+20dB. -- Regards, Peter, G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23598 invoked from network); 28 Dec 2000 20:38:15 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 28 Dec 2000 20:38:15 -0000 Received: (qmail 21323 invoked from network); 28 Dec 2000 20:33:04 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 28 Dec 2000 20:33:04 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Bjbz-0003lY-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 20:25:19 +0000 Received: from trinity.skynet.be ([195.238.2.38]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Bjby-0003lT-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 20:25:18 +0000 Received: from mh70i (free2530.powered-by.skynet.be [62.4.137.226]) by trinity.skynet.be (Postfix) with SMTP id 9D0EC18B47 for ; Thu, 28 Dec 2000 21:25:08 +0100 (MET) Message-ID: <000b01c0710c$74ecdc00$e289043e@mh70i> From: "DE BONDT WERNER" To: rsgb_lf_group@blacksheep.org Subject: LF: SOLDERING LITZ Date: Thu, 28 Dec 2000 21:26:25 +0100 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Hello Dick and all Lowfers
 
Interesting article abt soldering litz-wire Dick .
But If You don't like the professional way . Then do the following .
 
1 Put an ASPIRIN ( nothing ells ) on the table .
2 Lay the litz-wire on top .
3 Push with the solderiron on the wire , and solder .
I uses this method for mny years with success .
 
Don't hang to close with our nose over it because it picks .
 
Happy new year to all .   Werner ON6ND 
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6923 invoked from network); 28 Dec 2000 20:04:53 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 28 Dec 2000 20:04:53 -0000 Received: (qmail 17855 invoked from network); 28 Dec 2000 20:07:25 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Dec 2000 20:07:25 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BjD4-0003ck-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 19:59:34 +0000 Received: from mailout02.sul.t-online.com ([194.25.134.17]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BjD3-0003cf-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 19:59:33 +0000 Received: from fwd02.sul.t-online.com by mailout02.sul.t-online.com with smtp id 14BjCv-0002eL-02; Thu, 28 Dec 2000 20:59:25 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from (073662840-0003@[62.227.216.42]) by fwd02.sul.t-online.com with smtp id 14BjCg-1SoGNUC; Thu, 28 Dec 2000 20:59:10 +0100 From: "DL6SN" To: rsgb_lf_group@blacksheep.org Subject: LF: 136 kHz signals 28.12.2000 X-Mailer: T-Online eMail 2.34 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Date: Thu, 28 Dec 2000 20:59:10 +0100 Message-ID: <14BjCg-1SoGNUC@fwd02.sul.t-online.com> X-Sender: 073662840-0003@t-dialin.net Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: 137 kHz activity today 28.12.2000 RIG here: RX: Rohde & Schwarz EK 071 Ant: Monoband Vertical for 40 M (8.6 m long, up 8 m) Analyz: Speclab V1.3 (PC Celeron 500 MHz) PSK31SBW QTH: JN58AU 28.12.00 DF6NM 137.7 12:28 15 uV DFCW clg G4JNT 28.12.00 DK6NI 136.6 14:03 519 cq 28.12.00 DF6NM 137.7 16:30 14 uV cq in HELL 28.12.00 DF6NM 137.5 16:32 14 uV cq in PSK31 28.12.00 DF6NM 137.5 17:00 14 uV PSK31 qso with DK8KW end: 17:25 28.12.00 DK8KW 137.5 17:00 4 uV PSK31 qso with DF6NM end: 17:25 VY 73 FRED - DL6SN From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7700 invoked from network); 28 Dec 2000 18:40:15 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 28 Dec 2000 18:40:15 -0000 Received: (qmail 1934 invoked from network); 28 Dec 2000 18:42:47 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Dec 2000 18:42:47 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BhsF-0003I6-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 18:33:59 +0000 Received: from ewey-rwcmta.excite.com ([198.3.99.191] helo=ewey.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BhsD-0003I1-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 18:33:58 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by ewey.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001228183309.IMGH24504.ewey.excite.com@almond.excite.com> for ; Thu, 28 Dec 2000 10:33:09 -0800 Message-ID: <27258913.978028389838.JavaMail.imail@almond.excite.com> Date: Thu, 28 Dec 2000 10:33:08 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: EasyGram 1.21 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 62.253.64.5 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Sorry Guys, that one was meant to go direct, but I forgot to change the address before I pressed the Send button, hi! John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6064 invoked from network); 28 Dec 2000 18:10:18 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 28 Dec 2000 18:10:18 -0000 Received: (qmail 26585 invoked from network); 28 Dec 2000 18:12:51 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 28 Dec 2000 18:12:51 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BhP1-00032R-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 18:03:47 +0000 Received: from ds-img-7.compuserve.com ([149.174.206.153] helo=spdmbaaa.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BhOz-00032M-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 18:03:46 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by spdmbaaa.compuserve.com (8.9.3/8.9.3/SUN-1.9) id NAA10799 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 13:03:01 -0500 (EST) Date: Thu, 28 Dec 2000 13:02:12 -0500 From: "'Geri' Kinzel, DK8KW" Subject: Re: LF: EasyGram 1.21 To: rsgb_lf_group@blacksheep.org Message-ID: <200012281302_MC2-C009-58D8@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Guys, don't worry, >This made me laugh, because you could say I am in the same business (writing >software professionally since 1964) and I know only too well how easy it is >to make a mistake and how you don't find it until it has just gone out of >the door to a customer. >So for this reason I have l< people like Bill Gates and Co. do have the same problems: Customer: I have got a computer with Windows 98 Hotline: ... and, Sir, what can we do for you? Customer: the computer doesn't seem to work correctly. Hotline: ... you already mentioned that, Sir ... Best 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16970 invoked from network); 28 Dec 2000 17:03:00 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 28 Dec 2000 17:03:00 -0000 Received: (qmail 18723 invoked from network); 28 Dec 2000 17:06:12 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Dec 2000 17:06:12 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BgPn-0002tp-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 17:00:31 +0000 Received: from bucky-rwcmex.excite.com ([198.3.99.218] helo=bucky.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BgPm-0002tK-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 17:00:30 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by bucky.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001228165949.HZWO25756.bucky.excite.com@almond.excite.com> for ; Thu, 28 Dec 2000 08:59:49 -0800 Message-ID: <14471390.978022789927.JavaMail.imail@almond.excite.com> Date: Thu, 28 Dec 2000 08:59:45 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: EasyGram 1.21 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 62.253.64.5 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Petr, This made me laugh, because you could say I am in the same business (writing software professionally since 1964) and I know only too well how easy it is to make a mistake and how you don't find it until it has just gone out of the door to a customer. So for this reason I have learnt that new versions must not be sent out straight away. It needs to mature a while in house. Alan tells me that you have an interest in Loop antennas. I have been using Loops for receive for a couple or more years now with great success. My vertical picks up a lot of local noise and is almost unusable for receive. Recently I completed a variation on the KI0LE design which is now working really well, about 12 dB better than the G3LNP loop. However it is sensitive to noise pick-up, so it depends on the time of day and local QRM. Ideally a loop should be screened, but that is impractical with the new design (too much wind resistance). It is particularly good for me at night, when the local noise seems to disappear. I have described my experiences on my web site: www.g4cnn.f2s.com If you need any more information, such as constructional details, please let me know. 73 John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15129 invoked from network); 28 Dec 2000 16:27:06 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 28 Dec 2000 16:27:06 -0000 Received: (qmail 5866 invoked from network); 28 Dec 2000 16:30:19 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 28 Dec 2000 16:30:19 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Bfq4-0002jg-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 16:23:36 +0000 Received: from gigi.excite.com ([199.172.152.110]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Bfq0-0002ja-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 16:23:33 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by gigi.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001228162252.USRZ9407.gigi.excite.com@almond.excite.com> for ; Thu, 28 Dec 2000 08:22:52 -0800 Message-ID: <11052036.978020572778.JavaMail.imail@almond.excite.com> Date: Thu, 28 Dec 2000 08:22:48 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: LF: re: G4JNT HELL transmission today MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 62.253.64.5 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Andy and All, I have uploaded images of Andy's HELL transmissions seen today 28 December at 11.55 UT to my web site: www.g4cnn.f2s.com John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4283 invoked from network); 28 Dec 2000 15:13:18 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 28 Dec 2000 15:13:18 -0000 Received: (qmail 3568 invoked from network); 28 Dec 2000 15:16:31 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Dec 2000 15:16:31 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BehZ-0002T8-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 15:10:45 +0000 Received: from smtp-1.visp.telinco.net ([212.1.130.1]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BehY-0002T3-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 15:10:44 +0000 Received: from [212.1.141.12] (helo=g4jnt) by smtp-1.visp.telinco.net with smtp (Exim 3.16 #1) id 14Bea0-0004bn-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 15:02:56 +0000 Message-ID: <000c01c070df$f218bfa0$0c8d01d4@g4jnt> From: "Andrew Talbot" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: QRSS question Date: Thu, 28 Dec 2000 15:07:49 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.1 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: How about letting it go slow enough for a 30s dot or a resolution bandwidth of 0.01Hz - as far as I know the only soundcard software that could get anywhere near this and do proper SLOWCW was Spectran. None of this fast 3s dot stuff ! My 56002 EVM system can get down to 1 hour dot intervals, looking in a bandwidth of 100 uHz (micro Hz). That would span the Altantic with 1mW ERP if present records are anything to go by. Pitgy it would take several days for a proper QSO !!!!!!! :-( Andy G4JNT -----Original Message----- From: Alberto di Bene To: rsgb_lf_group@blacksheep.org Date: 28 December 2000 14:50 Subject: LF: QRSS question >What are the standards for QRSS ? I know of the 3 sec/dot and >the 10 sec/dot, but am wondering if something else is used. >I'm asking this as I am preparing a QRSS Viewer, with all the settings >pre-optimized for QRSS, and would like to include the presets for >the most used standards. Also, all the suggestions on functions are >appreciated. Automatic, timed, screen writing to disk is already >implemented, as is automatic zooming from full band view to a >selected portion chosen with the mouse. > >BTW this viewer doesn't need to interface the Windows mixer, >so it won't have the problems that Spectran is facing at present. > >TNX es 73 >Alberto I2PHD > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3484 invoked from network); 28 Dec 2000 15:05:18 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 28 Dec 2000 15:05:18 -0000 Received: (qmail 23550 invoked from network); 28 Dec 2000 15:07:49 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Dec 2000 15:07:49 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BeVr-0002Nw-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 14:58:39 +0000 Received: from mailout05.sul.t-online.com ([194.25.134.82]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BeVn-0002Nr-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 14:58:35 +0000 Received: from fwd07.sul.t-online.com by mailout05.sul.t-online.com with smtp id 14BeVe-0000z7-04; Thu, 28 Dec 2000 15:58:26 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from (0607144537-0001@[62.158.225.161]) by fwd07.sul.t-online.com with smtp id 14BeVW-22fDkGC; Thu, 28 Dec 2000 15:58:18 +0100 From: "bernd grupe" To: rsgb_lf_group@blacksheep.org Subject: LF: spuiis for LF? X-Mailer: T-Online eMail 2.34 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Date: Thu, 28 Dec 2000 15:58:18 +0100 Message-ID: <14BeVW-22fDkGC@fwd07.sul.t-online.com> X-Sender: 0607144537-0001@t-dialin.net Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi group, found this fine Freeware spurii on URL: http://www.hydesign.co.uk The Spur Search program allows analysis of possible spurious products generated within a radio system using multiple oscillators. One swept (eg 1st LO) and up to three fixed (eg 2nd LO / system clock etc.) can be specified and a search carried out to determine is any combinations of frequencies cause a product in, or traversing a bad of interest. A very useful tool for discovering mysterious lines on my spectrogram-screen. The following table gives an impression of my working conditions near the big commercial stations DCF42 and DBF39: the VFO is "Variable" (abt 1 kHz above rx-freq)! ---------------------------------------------------------------------- Spurii Search V2.12 15:49:01 28.12.00 Search for spurii in band 135.7kHz to 138kHz Variable=136.7kHz to 138.8kHz Fixed1=129kHz Fixed2=138.3kHz Fixed3=136.8kHz ---------------------------------------------------------------------- +1*Fixed3 (136.8kHz) +1*Fixed1+5*Fixed2-5*Fixed3 (136.5kHz) +1*Variable (136.7kHz to 138.8kHz) -1*Variable+2*Fixed3 (136.9kHz to 134.8kHz) -1*Variable+1*Fixed2+1*Fixed3 (138.4kHz to 136.3kHz) +1*Variable-1*Fixed2+1*Fixed3 (135.2kHz to 137.3kHz) -1*Variable+2*Fixed2 (139.9kHz to 137.8kHz) +1*Variable-2*Fixed2+2*Fixed3 (133.7kHz to 135.8kHz) +1*Variable+1*Fixed1+4*Fixed2-5*Fixed3 (134.9kHz to 137kHz) -1*Variable+1*Fixed1+5*Fixed2-4*Fixed3 (136.6kHz to 134.5kHz) +2*Variable-1*Fixed3 (136.6kHz to 140.8kHz) -2*Variable+3*Fixed3 (137kHz to 132.8kHz) +2*Variable-1*Fixed2 (135.1kHz to 139.3kHz) -2*Variable+1*Fixed2+2*Fixed3 (138.5kHz to 134.3kHz) -2*Variable+2*Fixed2+1*Fixed3 (140kHz to 135.8kHz) +2*Variable-2*Fixed2+1*Fixed3 (133.6kHz to 137.8kHz) -2*Variable+3*Fixed2 (141.5kHz to 137.3kHz) +2*Variable-3*Fixed2+2*Fixed3 (132.1kHz to 136.3kHz) +2*Variable+1*Fixed1+2*Fixed2-4*Fixed3 (131.8kHz to 136kHz) +2*Variable+1*Fixed1+3*Fixed2-5*Fixed3 (133.3kHz to 137.5kHz) -2*Variable+1*Fixed1+5*Fixed2-3*Fixed3 (136.7kHz to 132.5kHz) +2*Variable-1*Fixed1-5*Fixed2+5*Fixed3 (136.9kHz to 141.1kHz) +3*Variable-2*Fixed3 (136.5kHz to 142.8kHz) -3*Variable+4*Fixed3 (137.1kHz to 130.8kHz) +3*Variable-1*Fixed2-1*Fixed3 (135kHz to 141.3kHz) -3*Variable+1*Fixed2+3*Fixed3 (138.6kHz to 132.3kHz) +3*Variable+1*Fixed2-3*Fixed3 (138kHz to 144.3kHz) +3*Variable-2*Fixed2 (133.5kHz to 139.8kHz) -3*Variable+2*Fixed2+2*Fixed3 (140.1kHz to 133.8kHz) -3*Variable+3*Fixed2+1*Fixed3 (141.6kHz to 135.3kHz) +3*Variable-3*Fixed2+1*Fixed3 (132kHz to 138.3kHz) -3*Variable+4*Fixed2 (143.1kHz to 136.8kHz) +3*Variable-4*Fixed2+2*Fixed3 (130.5kHz to 136.8kHz) +3*Variable+1*Fixed1+1*Fixed2-4*Fixed3 (130.2kHz to 136.5kHz) +3*Variable+1*Fixed1+2*Fixed2-5*Fixed3 (131.7kHz to 138kHz) -3*Variable+1*Fixed1+5*Fixed2-2*Fixed3 (136.8kHz to 130.5kHz) +3*Variable-1*Fixed1-5*Fixed2+4*Fixed3 (136.8kHz to 143.1kHz) +4*Variable-3*Fixed3 (136.4kHz to 144.8kHz) -4*Variable+5*Fixed3 (137.2kHz to 128.8kHz) +4*Variable-1*Fixed2-2*Fixed3 (134.9kHz to 143.3kHz) -4*Variable+1*Fixed2+4*Fixed3 (138.7kHz to 130.3kHz) +4*Variable+1*Fixed2-4*Fixed3 (137.9kHz to 146.3kHz) +4*Variable-2*Fixed2-1*Fixed3 (133.4kHz to 141.8kHz) -4*Variable+2*Fixed2+3*Fixed3 (140.2kHz to 131.8kHz) +4*Variable-3*Fixed2 (131.9kHz to 140.3kHz) -4*Variable+3*Fixed2+2*Fixed3 (141.7kHz to 133.3kHz) -4*Variable+4*Fixed2+1*Fixed3 (143.2kHz to 134.8kHz) +4*Variable-4*Fixed2+1*Fixed3 (130.4kHz to 138.8kHz) -4*Variable+5*Fixed2 (144.7kHz to 136.3kHz) +4*Variable-5*Fixed2+2*Fixed3 (128.9kHz to 137.3kHz) +4*Variable+1*Fixed1-4*Fixed3 (128.6kHz to 137kHz) +4*Variable+1*Fixed1+1*Fixed2-5*Fixed3 (130.1kHz to 138.5kHz) -4*Variable+1*Fixed1+5*Fixed2-1*Fixed3 (136.9kHz to 128.5kHz) +4*Variable-1*Fixed1-5*Fixed2+3*Fixed3 (136.7kHz to 145.1kHz) +5*Variable-4*Fixed3 (136.3kHz to 146.8kHz) +5*Variable-1*Fixed2-3*Fixed3 (134.8kHz to 145.3kHz) -5*Variable+1*Fixed2+5*Fixed3 (138.8kHz to 128.3kHz) +5*Variable+1*Fixed2-5*Fixed3 (137.8kHz to 148.3kHz) +5*Variable-2*Fixed2-2*Fixed3 (133.3kHz to 143.8kHz) -5*Variable+2*Fixed2+4*Fixed3 (140.3kHz to 129.8kHz) +5*Variable-3*Fixed2-1*Fixed3 (131.8kHz to 142.3kHz) -5*Variable+3*Fixed2+3*Fixed3 (141.8kHz to 131.3kHz) +5*Variable-4*Fixed2 (130.3kHz to 140.8kHz) -5*Variable+4*Fixed2+2*Fixed3 (143.3kHz to 132.8kHz) -5*Variable+5*Fixed2+1*Fixed3 (144.8kHz to 134.3kHz) +5*Variable-5*Fixed2+1*Fixed3 (128.8kHz to 139.3kHz) +5*Variable+1*Fixed1-5*Fixed3 (128.5kHz to 139kHz) +5*Variable+1*Fixed1-1*Fixed2-4*Fixed3 (127kHz to 137.5kHz) +5*Variable+1*Fixed1-2*Fixed2-3*Fixed3 (125.5kHz to 136kHz) -5*Variable-1*Fixed1+2*Fixed2+5*Fixed3 (148.1kHz to 137.6kHz) -5*Variable+1*Fixed1+5*Fixed2 (137kHz to 126.5kHz) +5*Variable-1*Fixed1-5*Fixed2+2*Fixed3 (136.6kHz to 147.1kHz) 73 de Bernd, DF8ZR From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21151 invoked from network); 28 Dec 2000 14:39:02 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 28 Dec 2000 14:39:02 -0000 Received: (qmail 15958 invoked from network); 28 Dec 2000 14:33:51 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 28 Dec 2000 14:33:51 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Be1V-0002GU-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 14:27:17 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from e3.ny.us.ibm.com ([32.97.182.103]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Be1S-0002GP-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 14:27:14 +0000 Received: from northrelay01.pok.ibm.com (northrelay01.pok.ibm.com [9.117.200.21]) by e3.ny.us.ibm.com (8.9.3/8.9.3) with ESMTP id JAA63552 for ; Thu, 28 Dec 2000 09:26:15 -0500 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (ss10.bld.socks.ibm.com [9.14.4.76] (may be forged)) by northrelay01.pok.ibm.com (8.8.8m3/NCO v4.95) with ESMTP id JAA133268 for ; Thu, 28 Dec 2000 09:24:43 -0500 Message-ID: <3A4B4DA8.1FE33854@usa.net> Date: Thu, 28 Dec 2000 15:26:48 +0100 From: "Alberto di Bene" X-Mailer: Mozilla 4.76 [en] (WinNT; U) X-Accept-Language: en,pdf MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: QRSS question References: <001601c070d4$b6c64a40$13dc893e@default> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: What are the standards for QRSS ? I know of the 3 sec/dot and the 10 sec/dot, but am wondering if something else is used. I'm asking this as I am preparing a QRSS Viewer, with all the settings pre-optimized for QRSS, and would like to include the presets for the most used standards. Also, all the suggestions on functions are appreciated. Automatic, timed, screen writing to disk is already implemented, as is automatic zooming from full band view to a selected portion chosen with the mouse. BTW this viewer doesn't need to interface the Windows mixer, so it won't have the problems that Spectran is facing at present. TNX es 73 Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27343 invoked from network); 28 Dec 2000 13:56:38 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 28 Dec 2000 13:56:38 -0000 Received: (qmail 9304 invoked from network); 28 Dec 2000 13:59:08 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Dec 2000 13:59:08 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BdUE-00024n-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 13:52:54 +0000 Received: from mail11.svr.pol.co.uk ([195.92.193.23]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BdUC-00024g-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 13:52:52 +0000 Received: from modem-19.yellow-billed-loon.dialup.pol.co.uk ([62.137.220.19] helo=default) by mail11.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14BdU1-0006z0-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 13:52:42 +0000 Message-ID: <001601c070d4$b6c64a40$13dc893e@default> From: "MAL HAMILTON" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Big/small antennas. Date: Thu, 28 Dec 2000 13:46:33 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
 
-----Original Message-----
From: Walter Blanchard <blanch@pncl.co.uk>
To: rsgb_lf_group@blacksheep.org <rsgb_lf_group@blacksheep.org>
Date: 27 December 2000 14:17
Subject: LF: Big/small antennas.

Hello gang,

Since our professional controversialist ('3KEV)
This is known as individualism and not following the mob. Some people are individuals and express their opinions. Some have the sheep mentality and some are brain washed by the establishment. Dont rock the boat even you know they are wrong. Keep your antenna buried during daylight and only bring it out after dark in case you upset your neighbour. Take your pick. 
 
 
 
 has raised the big/small antenna discussion again, and I'm fed up playing Scrabble, here's a few points he might like to ponder on while he's drinking in the New Year:

The "professional" antenna/system engineer's job is to provide a guaranteed signal at all times 24hrs/day, 365 days a year. If it is a navigational system, as we had in Decca, not just guaranteed field strength but guaranteed phase stability as well, to better than 10 degs.  You can't do that with a piece of wire waving in the wind; coils of unknown and variable characteristics, poor earth systems, etc.  And you want to minimise skywave as much as possible; it's just a nuisance. So you go for a vertical, the bigger the better, not particularly because it radiates better but because the bigger it is the more predictable and stable it is.  You want absolutely stable characteristics whether it's wet, loaded with ice, covered in snow, or blowing a Force 12 gale.  And you don't want to pay for a team of skilled engineers to be permanently on site 24 hrs/day to re-tune it every time something changes.  Automatic tuning can do a bit for you but not everything.
Then there's cost. A big antenna costs a lot in initial purchase and annual maintenance, sure, but not as much as installing a 2 megawatt transmitter and paying for its maintenance and the electricity it consumes.  Some high-powered Russian navigation transmitters have gone off the air recently because they couldn't afford the electricity bill.  You have to look at where your income is coming from and whether it will support the running costs of the high-powered transmitter you're going to have to put in because you're only going to have a little aerial.  Years ago I used to have to do this sort of calculation and believe you me the big antenna is cheaper and a good deal less trouble in the long run.

This is apart from the sheer engineering consideration of how much field strength you need and where. The BBC consider that at LF they need a minimum of 1 millivolt/metre to get a signal into a little tranny in a block of flats in a city.  This is about S9+60 db by amateur standards (please, no arguments about what amateur S-points mean!) and results in things like the 400 kW e.r.p Droitwich transmitter to serve only a 200-mile radius but which can be heard in America quite often.  Note, incidentally, that as pointed out by others, range depends ONLY on e.r.p. in the direction you want, it doesn't matter how you produce it. And yes, if it was possible to get 1W radiated out of a 10 foot vertical antenna at 136 kHz it would work just as well as 1W out of a 600 ft vertical. At 136 kHz all antennas are tiny and radiate omni-directionally in the vertical plane. The differences would be you would need something like a 25 kW transmitter instead of a 2.5W tiddler; as soon as it got foggy everything would arc over;  it would be impossible to keep loaded efficiently even if you sat with one hand on a tuning control, you would have to spend a lot of money on very good insulators, (and go out and polish them every few hours), etc, etc.  In other words, totally impracticable if you want 24hr availability.  And yes, I have tried it, about 30 years ago we tried to radiate a 100 kHz signal off a 10 ft stick (coil, actually) ; in perfectly dry conditions (Arizona desert)  it (sort of) worked, but it never worked in England for more than a few minutes. Theory 10, practicality 0.  As a matter of interest we eventually made the system work reliably around the North Sea by using 180 footers (it was a variety of Loran-C in case anyone's interested - closed down some years ago in favour of DGPS).

As amateurs we might well decide it's worth living with a lot of this aggro just to get those few minutes across the Atlantic, but professionally you can forget it. So please stop making silly comparisons between amateur and professional practice. Quite a lot of  us "amateurs" are also "professionals" but find "amateur" work liberating after the irritating constraints of a lot of "professional" work.

My goodness, this bottle of "Glenfiddich" has gone down rather quickly - and it's not even the New Year yet!

Happy New Year, Gluckliches Neues Jahr (sorry I don't know any Dutch, Swedish or Finnish!)

Walter G3JKV.

 
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25330 invoked from network); 28 Dec 2000 13:56:07 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 28 Dec 2000 13:56:07 -0000 Received: (qmail 6251 invoked from network); 28 Dec 2000 13:59:19 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 28 Dec 2000 13:59:19 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BdUB-00024h-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 13:52:51 +0000 Received: from mail11.svr.pol.co.uk ([195.92.193.23]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BdU9-00024b-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 13:52:49 +0000 Received: from modem-19.yellow-billed-loon.dialup.pol.co.uk ([62.137.220.19] helo=default) by mail11.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14BdTy-0006z0-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 13:52:39 +0000 Message-ID: <001501c070d4$b4b65600$13dc893e@default> From: "MAL HAMILTON" To: "rsgb" Subject: LF: Re: Big/small antennas. Date: Wed, 27 Dec 2000 18:30:16 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
 
-----Original Message-----
From: Walter Blanchard <blanch@pncl.co.uk>
To: rsgb_lf_group@blacksheep.org <rsgb_lf_group@blacksheep.org>
Date: 27 December 2000 14:17
Subject: LF: Big/small antennas.

Hello gang,

Since our professional controversialist ('3KEV) has raised the big/small antenna discussion again, and I'm fed up playing Scrabble, here's a few points he might like to ponder on while he's drinking in the New Year:

The "professional" antenna/system engineer's job is to provide a guaranteed signal at all times 24hrs/day, 365 days a year. If it is a navigational system, as we had in Decca, not just guaranteed field strength but guaranteed phase stability as well, to better than 10 degs.  You can't do that with a piece of wire waving in the wind; coils of unknown and variable characteristics, poor earth systems, etc.  And you want to minimise skywave as much as possible; it's just a nuisance. So you go for a vertical, the bigger the better, not particularly because it radiates better but because the bigger it is the more predictable and stable it is.  You want absolutely stable characteristics whether it's wet, loaded with ice, covered in snow, or blowing a Force 12 gale.  And you don't want to pay for a team of skilled engineers to be permanently on site 24 hrs/day to re-tune it every time something changes.  Automatic tuning can do a bit for you but not everything.
Then there's cost. A big antenna costs a lot in initial purchase and annual maintenance, sure, but not as much as installing a 2 megawatt transmitter and paying for its maintenance and the electricity it consumes.  Some high-powered Russian navigation transmitters have gone off the air recently because they couldn't afford the electricity bill.  You have to look at where your income is coming from and whether it will support the running costs of the high-powered transmitter you're going to have to put in because you're only going to have a little aerial.  Years ago I used to have to do this sort of calculation and believe you me the big antenna is cheaper and a good deal less trouble in the long run.

This is apart from the sheer engineering consideration of how much field strength you need and where. The BBC consider that at LF they need a minimum of 1 millivolt/metre to get a signal into a little tranny in a block of flats in a city.  This is about S9+60 db by amateur standards (please, no arguments about what amateur S-points mean!) and results in things like the 400 kW e.r.p Droitwich transmitter to serve only a 200-mile radius but which can be heard in America quite often.  Note, incidentally, that as pointed out by others, range depends ONLY on e.r.p. in the direction you want, it doesn't matter how you produce it. And yes, if it was possible to get 1W radiated out of a 10 foot vertical antenna at 136 kHz it would work just as well as 1W out of a 600 ft vertical. At 136 kHz all antennas are tiny and radiate omni-directionally in the vertical plane. The differences would be you would need something like a 25 kW transmitter instead of a 2.5W tiddler; as soon as it got foggy everything would arc over;  it would be impossible to keep loaded efficiently even if you sat with one hand on a tuning control, you would have to spend a lot of money on very good insulators, (and go out and polish them every few hours), etc, etc.  In other words, totally impracticable if you want 24hr availability.  And yes, I have tried it, about 30 years ago we tried to radiate a 100 kHz signal off a 10 ft stick (coil, actually) ; in perfectly dry conditions (Arizona desert)  it (sort of) worked, but it never worked in England for more than a few minutes. Theory 10, practicality 0.  As a matter of interest we eventually made the system work reliably around the North Sea by using 180 footers (it was a variety of Loran-C in case anyone's interested - closed down some years ago in favour of DGPS).

As amateurs we might well decide it's worth living with a lot of this aggro just to get those few minutes across the Atlantic, but professionally you can forget it. So please stop making silly comparisons between amateur and professional practice. Quite a lot of  us "amateurs" are also "professionals" but find "amateur" work liberating after the irritating constraints of a lot of "professional" work.

My goodness, this bottle of "Glenfiddich" has gone down rather quickly - and it's not even the New Year yet!
 
I wonder what you would be like on a good glass of Irish whiskey. It is a good story but lacks the cartoon section that appeared in the old comic discussed here recently.
Happy New Year and try some Black Bush next time. You might publish a hard back soon!!!!!!!!!!!!! You have potential and I hope a sense of HUMOUR which sadly SOME seem to lack on here.
G3KEV

Happy New Year, Gluckliches Neues Jahr (sorry I don't know any Dutch, Swedish or Finnish!)

Walter G3JKV.

 
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19652 invoked from network); 28 Dec 2000 13:15:28 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 28 Dec 2000 13:15:28 -0000 Received: (qmail 13240 invoked from network); 28 Dec 2000 13:18:00 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 28 Dec 2000 13:18:00 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Bcpk-0001wg-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 13:11:04 +0000 Received: from mail4.svr.pol.co.uk ([195.92.193.211]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Bcpj-0001wb-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 13:11:03 +0000 Received: from modem-113.new-hampshire.dialup.pol.co.uk ([62.137.80.113] helo=lsear.freeserve.co.uk) by mail4.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14Bcpa-0005GH-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 13:10:55 +0000 Message-ID: <000001c070cf$28ba19c0$7150893e@lsear.freeserve.co.uk> From: "Lionel Sear" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Re: Off topic - Soundblaster AGC Date: Thu, 28 Dec 2000 12:47:32 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.2106.4 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I can only comment for my own (genuine) SB16. I invoked the suite of programs that came with the card and selected "Creative Mixer". By clicking on the icon at the top left of the window you obtain a menu which includes "Recording Settings". Following this yields the AGC enable/disable facility. It may be that a given clone will allow an eqivalent way in, or it may not even have an AGC facility at all. I do not know the Windows API way of handling this, the Multimedia Reference that came with my C++ Builder has nothing on it. Use the AGC facility with care and do not overload the input or you get terrible effects. It is a pity that soundcards do not limit in the way that op-amps do. 73 Lionel G3PPT From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17671 invoked from network); 28 Dec 2000 13:13:20 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 28 Dec 2000 13:13:20 -0000 Received: (qmail 17639 invoked from network); 28 Dec 2000 13:15:51 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Dec 2000 13:15:51 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BcpF-0001wZ-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 13:10:33 +0000 Received: from carbon.btinternet.com ([194.73.73.92]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BcpE-0001wU-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 13:10:32 +0000 Received: from [62.7.72.117] (helo=default) by carbon.btinternet.com with smtp (Exim 3.03 #83) id 14Bcp6-0006b6-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 13:10:24 +0000 Message-ID: <000401c070cf$8e7a6120$7548073e@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: Hell + PSK31 from G4FEV Date: Thu, 28 Dec 2000 13:09:45 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi All lotsa good copy Hell from Andy this morning, on 2 different 'bandwidths'. Also a good copy on PSK31 from G4FEV on 137.5kHz in Northants Cheers de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3740 invoked from network); 28 Dec 2000 12:56:07 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 28 Dec 2000 12:56:07 -0000 Received: (qmail 23449 invoked from network); 28 Dec 2000 12:59:19 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Dec 2000 12:59:19 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BcYl-0001pV-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 12:53:31 +0000 Received: from lepidachrosite.lion-access.net ([212.19.217.3]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BcYj-0001pQ-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 12:53:29 +0000 Received: from w8k3f0 (1Cust31.tnt27.rtm1.nl.uu.net [213.116.148.31]) by lepidachrosite.lion-access.net (I-Lab) with SMTP id F1DC0CB292 for ; Thu, 28 Dec 2000 12:53:09 +0000 (GMT) Message-ID: <007001c070c4$d5b3b880$289274d5@w8k3f0> From: "Dick Rollema" To: rsgb_lf_group@blacksheep.org References: <200012261227_MC2-BFB5-9363@compuserve.com> Subject: LF: Re: Re: Re. VE1ZZ Date: Thu, 28 Dec 2000 12:17:35 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: To All from PA0SE Geri, DK8KW wrote: Please see below the relevant definitions as they are recommended by the ITU. Many thanks Geri. Very useful info. 73, Dick, PA0SE "DEFINITIONS OF RADIATION IN LF, MF AND HF BROADCASTING BANDS (1978-1982-1986) Rec. 561-2 The CCIR UNANIMOUSLY RECOMMENDS that the following terminology should be used to define and determine the radiation from sound-broadcasting transmitters: 1. Cymomotive force (c.m.f.) (in a given direction) The product formed by multiplying the electric field strength at a given point in space, due to a transmitting station, by the distance of the point from the antenna. This distance must be sufficient for the reactive components of the field to be negligible; moreover, the finite conductivity of the ground is supposed to have no effect on propagation. The cymomotive force (c.m.f.) is a vector; when necessary it may be expressed in terms of components along axes perpendicular to the direction of propagation. The c.m.f. is expressed in volts; it corresponds numerically to the field strength in mV/m at a distance of 1 km. 2. Effective monopole-radiated power (e.m.r.p.) (in a given direction) The product of the power supplied to the antenna and its gain relative to a short vertical antenna in the given direction. (Radio Regulations, No. 157.) Radio Regulations No. 154 (c) defines the gain of an antenna in a given direction relative to a short vertical antenna G v as the gain relative to a loss-free reference antenna consisting of a linear conductor, much shorter than one quarter of a wavelength, normal to the surface of a perfectly conducting plane which contains the given direction. The reference antenna, when fed with a power of 1 kW, is considered to radiate an e.m.r.p. of 1 kW in any direction in the perfectly conducting plane and produces a field strength of 300 mV/m at 1 km distance (equivalent to a c.m.f. of 300 V). An e.m.r.p. of 1 kW is assumed in the derivation of the ground-wave propagation curves of Recommen-dation 368. An e.m.r.p. of 1 kW at all angles of elevation is assumed in the presentation of the sky-wave curves of Recommendation 435. Note 1 - Definitions 1 and 2 are mainly used in LF and MF broadcasting. 3. Equivalent isotropically radiated power (e.i.r.p.) The product of the power supplied to the antenna and the antenna gain G i in a given direction relative to an isotropic antenna (absolute or isotropic gain) (Radio Regulations, No. 155). The idealized reference antenna, when fed with a power of 1 kW, is considered to provide an e.i.r.p. of 1 kW in all directions and to produce a field strength of 173 mV/m at 1 km distance. 4. Effective radiated power (e.r.p.) (in a given direction) The product of the power supplied to the antenna and its gain relative to a half-wave dipole in a given direction (Radio Regulations, No. 156). Radio Regulations No. 154 (b) defines the gain of an antenna in a given direction relative to a half-wave dipole G d , as the gain relative to a loss-free reference antenna isolated in space whose equatorial plane contains the given direction. The reference antenna, when fed with a power of 1 kW, is considered to radiate an e.r.p. of 1 kW in any direction in the equatorial plane and produces a field strength of 222 mV/m at 1 km distance." --------------------------------------------------------------------------- -------------------- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23472 invoked from network); 28 Dec 2000 11:39:06 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 28 Dec 2000 11:39:06 -0000 Received: (qmail 27811 invoked from network); 28 Dec 2000 11:42:19 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 28 Dec 2000 11:42:19 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BbLD-0001Yr-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 11:35:27 +0000 Received: from mailout02.sul.t-online.com ([194.25.134.17]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BbLC-0001Ym-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 11:35:26 +0000 Received: from fwd07.sul.t-online.com by mailout02.sul.t-online.com with smtp id 14BbL4-0006YA-05; Thu, 28 Dec 2000 12:35:18 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from (073662840-0003@[62.227.216.78]) by fwd07.sul.t-online.com with smtp id 14BbKs-1F0WB6C; Thu, 28 Dec 2000 12:35:06 +0100 From: "DL6SN" To: rsgb_lf_group@blacksheep.org Subject: LF: 136 kHz signals heard X-Mailer: T-Online eMail 2.34 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Date: Thu, 28 Dec 2000 12:35:06 +0100 Message-ID: <14BbKs-1F0WB6C@fwd07.sul.t-online.com> X-Sender: 073662840-0003@t-dialin.net Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: A short SWL (better LWL?)- report: RIG here: RX: Rohde & Schwarz EK 071 Ant: Monoband Vertical for 40 M (8.6 m long, up 8 m) Analyz: Speclab V1.3 (PC Celeron 500 MHz) QTH: JN58AU 25.12.00 DK6NI 136.8 9:40 519 cq 26.12.00 DK8KW 136.4 10:05 539 in qso with PA0KDM 26.12.00 EI0CF 137.7 18:17 M qrss only call 26.12.00 DF6NM 137.5 18:30 10 uV cq in PSK31 - ufb copy 26.12.00 DF6NM 137.7 20:06 10 uV cq in qrss 26.12.00 DF6NM 137.7 20:10 10 uV cq in dfcw VY 73 FRED - DL6SN From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8147 invoked from network); 28 Dec 2000 11:28:57 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 28 Dec 2000 11:28:57 -0000 Received: (qmail 11504 invoked from network); 28 Dec 2000 11:31:29 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 28 Dec 2000 11:31:29 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Bb9b-0001Vh-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 11:23:27 +0000 Received: from lepidachrosite.lion-access.net ([212.19.217.3]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Bb9Y-0001Vc-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 11:23:24 +0000 Received: from w8k3f0 (Meowth.Pokemon.dialin.freeler.nl [212.26.215.39]) by lepidachrosite.lion-access.net (I-Lab) with SMTP id 6DD55CB06A; Thu, 28 Dec 2000 11:22:54 +0000 (GMT) Message-ID: <000f01c070b8$3a689640$27d71ad4@w8k3f0> From: "Dick Rollema" To: "LF-Group" Cc: "Cas Caspers, PA0CSC" , "Klaas Robers, PA0KLS" , "Koos Fockens, PA0KDF" , "Jan Ottens, PA0SSB" , "Jan Harte, PA0HRT" Subject: LF: Soldering litz wire Date: Thu, 28 Dec 2000 11:11:27 +0100 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
To All from PA0SE
 
May I inject an item on a low-tech subject into the stream of high-tech stuff that has been coming to us via the reflector?
 
I know that soldering litz wire has been discussed extensively lately but by chance I came across an article on the subject written by a professional that may interest you. It relates to litz wire with strands covered by enamel. Modern litz has a coating that dissolves in molten solder and soldering  is no problem.
 
I found the article in the 1949 edition of ELECTRONICS MANUAL FOR RADIO ENGINEERS  (McGraw-Hill).
 
I wish you and yours a happy and healthy New Year with extreme DX!
 
73, Dick, PA0SE
JO22GD
 
Soldering Litz Ends
 
By EMERICK TOTH
 
The writer had occasion to design a receiver for aircraft using coils of litzendraht wire. These coils ranged in diameter from 12 inches, wound with litz of about 180 strands of number 38 wire, to little fellows of 1/2 inch ID using 7/41 litz. Over 150 coils were involved, a total of more than 300 coil ends, thousands of individual strands that must be properly tinned and soldered. Careful tests were made of the following three methods:
  (1)  Cautious removal of the silk and enamel from the coils end by abrasion against a relatively soft high-speed rotary wirebrush.
  (2)  Heating of the coils end in an alcohol or Bunsen-burner flame and subsequent plunging of the hot coil end into alcohol.
  (3)  Application of a small quantity of a paste of zinc chloride and water to the coil end and heating with a soldering iron, immediately followed by tinning with rosin-core solder while the resulting zinc chloride and enamel mixture was still boiling. The silk insulation was burned and stripped off by a very short exposure to a flame, and subsequent wiping with a rag prior application of the zinc chloride.
  Method (1) was found to damage individual strands excessively, and did not clean all strands in sizes of litz with many strands, such as 70/38 and 180/38.
  Method (2) was difficult to control. Insufficient exposure to the flame resulted in the enamel not cracking off when the hot coil end was plunged into cold alcohol. Overheating caused individual strands to burn off. Even when satisfactory cleaning was obtained, the copper was left so brittle that soldered coil end would break easily.
  Method (3) provides easy and effective tinning. The appearance of the tinned end was neat and clean  after the residue of zinc chloride, enamel, rosin, and solder had been wiped off while still hot with a damp rag. The ease of tinning even 180/38 litz suggested that inside strands were not properly coated. Several samples were cut in cross-section but all strands appeared to be clean of enamel and tinned. 
  Samples were placed in a salt-spray chamber and subjected to the Navy's standard salt-spray test for two hours. It was found that except for a light accumulation of powdery salt the samples were in no way affected by the test and all 300 coil ends were  processed as outlined in method (3) above.
  Eighteen months after delivery, one equipment was examined which had been in service in Panama for a year.  No trace of corrosion or any other damage was found. 
  Zinc chloride is very hygroscopic and should be kept in a suitable well-stoppered glass bottle, with only as much paste prepared at one time as is needed for a few hours use. 
  
 
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10495 invoked from network); 28 Dec 2000 11:00:03 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 28 Dec 2000 11:00:03 -0000 Received: (qmail 18979 invoked from network); 28 Dec 2000 11:02:34 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Dec 2000 11:02:34 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BaiT-0001QG-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 10:55:25 +0000 Received: from smtp-1.visp.telinco.net ([212.1.130.1]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BaiS-0001QB-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 10:55:24 +0000 Received: from [212.1.156.102] (helo=g4jnt) by smtp-1.visp.telinco.net with smtp (Exim 3.16 #1) id 14Baaf-0003Es-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 10:47:21 +0000 Message-ID: <002001c070bc$3ceb73c0$949901d4@g4jnt> From: "Andrew Talbot" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: BPSK Tests Date: Thu, 28 Dec 2000 10:50:11 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.1 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Yes, it was me for about an hour. Just another soak test as I've finally put IRF452 devices into the PA to give that extra bit of reliability now. As the garden has dried out the antenna tuning has changed and I noticed the PA heatsink getting quite a bit hotter than before whenon air testing. Need to think carefully why dissipation increases so much on a reactive load for a given supply current. The transmitter is a voltage source with a small internal resistance - 2 to 3 ohms is my estimate so I need to sit down with phasor diagrams and a calculator to get a handle on this dissipation issue. It really is worth installing Coherent / Africa - the BPSK mode is an excellent implementation with enough user flexibility to allow serious experimentation. I have given it a write up in the 'Data' column in February's RadCom - in fact given the whole column over to it. I'll put up the SMTH Hell signal now - at 1100z Andy G4JNT -----Original Message----- From: MarkusVester@aol.com To: rsgb_lf_group@blacksheep.org Date: 28 December 2000 01:28 Subject: LF: BPSK Tests >Hi Andy, > > yesterday around 11:00 there was a 10 Hz wide patterned strip visible on >Spectrogram 137.790 kHz which looked like a BPSK transmission from you. With >about -3 dBuV/m, the spectral density was 8 dB above the noise, but I >couldn't decode it yet as I haven't installed Bills software. It's the first >time I have seen one of your sigs (new PA paying off ?), and I would really >like to look at your MT Hell one day. > >Cheers de Markus, >DF6NM in JN59NK > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4407 invoked from network); 28 Dec 2000 09:47:01 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 28 Dec 2000 09:47:01 -0000 Received: (qmail 5548 invoked from network); 28 Dec 2000 09:49:31 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Dec 2000 09:49:31 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BZYE-0001AR-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 09:40:46 +0000 Received: from mail4.svr.pol.co.uk ([195.92.193.211]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BZYD-0001AM-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 09:40:46 +0000 Received: from modem-90.kurchatovium.dialup.pol.co.uk ([62.136.72.90] helo=robing) by mail4.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14BZY5-0006Bv-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 09:40:37 +0000 Message-ID: <000a01c070b2$569886a0$5a48883e@robing> From: "Robin T. Greenwood" To: rsgb_lf_group@blacksheep.org References: <000601c0706b$c94aada0$d0fd7ad5@default> Subject: LF: Re: Subscribing.. Date: Thu, 28 Dec 2000 09:41:04 -0000 Organization: - MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Will sombody please remind me how I subscribed to this reflector please!!! Then I can tell sombody else.. Robin G3LBA From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21185 invoked from network); 28 Dec 2000 07:35:56 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 28 Dec 2000 07:35:56 -0000 Received: (qmail 25786 invoked from network); 28 Dec 2000 07:38:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Dec 2000 07:38:26 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BXXl-0000iM-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 07:32:09 +0000 Received: from ds-img-3.compuserve.com ([149.174.206.136] helo=spdmgaac.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BXXk-0000iH-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 07:32:08 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by spdmgaac.compuserve.com (8.9.3/8.9.3/SUN-1.9) id CAA04955 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 02:31:30 -0500 (EST) Date: Thu, 28 Dec 2000 02:31:13 -0500 From: "'Geri' Kinzel, DK8KW" Subject: LF: Re: Slow Voice experiments To: rsgb_lf_group@blacksheep.org Message-ID: <200012280231_MC2-BFE3-CAFE@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Lionel, your idea to write a separate program to increase the length by 8 times and the pitch accordingly is great. I think those experiments might also be interesting for others (see mail by DF6NM), so don't worry about discussing this subject via the reflector. Maybe we are about to invent the LF best mode for the future ... I am currently testing adjustments with Cool Edit to do the necessary transpose functions. Cool Edit also has a frequency analysis so that I immediately can see the results of what I performed. In the next few days I will give it a try and try a slow-voice qso with Markus ... Vy 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18552 invoked from network); 28 Dec 2000 07:32:02 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 28 Dec 2000 07:32:02 -0000 Received: (qmail 19725 invoked from network); 28 Dec 2000 07:34:33 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 28 Dec 2000 07:34:33 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BXSB-0000hm-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 07:26:23 +0000 Received: from ds-img-7.compuserve.com ([149.174.206.153] helo=spdmbaaa.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BXS9-0000he-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 07:26:22 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by spdmbaaa.compuserve.com (8.9.3/8.9.3/SUN-1.9) id CAA21275 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 02:25:44 -0500 (EST) Date: Thu, 28 Dec 2000 02:25:20 -0500 From: "'Geri' Kinzel, DK8KW" Subject: LF: Slow Voice with frequency offset To: rsgb_lf_group@blacksheep.org Message-ID: <200012280225_MC2-BFE3-CAEE@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Markus, >Locally, the scheme worked amazingly well, now I'd like to try it out on the >air. My preferred freq would be 136.88 kHz shifted zerobeat, 136.95 to 137.5 >USB. With 16 mW radiated PEP this experiment will be rather restricted, so >who of my neighbours would like to try? not really your nearest neighbor, but we can give it a try! Just playing around with Cool Edit and try to find the right adjustments. In the next couple of days we can give it a try! Vy 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22792 invoked from network); 28 Dec 2000 01:47:46 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 28 Dec 2000 01:47:46 -0000 Received: (qmail 10966 invoked from network); 28 Dec 2000 01:50:16 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Dec 2000 01:50:16 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BS85-00081j-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 01:45:17 +0000 Received: from ds-img-3.compuserve.com ([149.174.206.136] helo=spdmgaac.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BS83-00081e-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 01:45:16 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by spdmgaac.compuserve.com (8.9.3/8.9.3/SUN-1.9) id UAA20673 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 20:44:37 -0500 (EST) Date: Wed, 27 Dec 2000 20:43:54 -0500 From: "'Geri' Kinzel, DK8KW" Subject: LF: VE1ZZ To: rsgb_lf_group@blacksheep.org Message-ID: <200012272044_MC2-BFE9-1A63@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: >Listening was not feasible before 0030z here due to local noise but no >decodable signals were seen at 0030z or 0100z. ... same here in Germany, the noise level was (and still is at 01.43 UTC) too high. 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26377 invoked from network); 28 Dec 2000 01:44:43 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 28 Dec 2000 01:44:43 -0000 Received: (qmail 5204 invoked from network); 28 Dec 2000 01:47:52 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Dec 2000 01:47:52 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BS59-00081T-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 01:42:15 +0000 Received: from tomts7.bellnexxia.net ([209.226.175.40] helo=tomts7-srv.bellnexxia.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BS58-00081O-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 01:42:14 +0000 Received: from r980913 ([216.209.182.51]) by tomts7-srv.bellnexxia.net (InterMail vM.4.01.03.00 201-229-121) with SMTP id <20001228014134.OZDK1081.tomts7-srv.bellnexxia.net@r980913> for ; Wed, 27 Dec 2000 20:41:34 -0500 Message-ID: <000d01c0706f$5fae19a0$33b6d1d8@r980913> From: "Dave Goodwin VE2ZP/VE9CB" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: VE1ZZ Date: Wed, 27 Dec 2000 20:41:57 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.2106.4 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Alan: >Hi all, Jack declared a transmitting slots on the DX cluster of 2200z and >2230z, but did not post them until 2204z !!. Don't take the times associated with cluster spots as accurate. I have seen many cluster spots that showed a time much later and much earlier than when they appeared on my screen. Spots are time-stamped on the node on which they were first sent. If that node's clock is off, then the error will be repeated thoughout the network. 73, Dave VE2ZP From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12262 invoked from network); 28 Dec 2000 01:29:49 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 28 Dec 2000 01:29:49 -0000 Received: (qmail 23365 invoked from network); 28 Dec 2000 01:24:38 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 28 Dec 2000 01:24:38 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BRfy-0007uJ-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 01:16:14 +0000 Received: from [194.73.73.176] (helo=protactinium) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BRfx-0007uE-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 01:16:13 +0000 Received: from [213.122.253.208] (helo=default) by protactinium with smtp (Exim 3.03 #83) id 14BRfm-0006yV-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 01:16:02 +0000 Message-ID: <000601c0706b$c94aada0$d0fd7ad5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: VE1ZZ Date: Thu, 28 Dec 2000 01:15:03 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all, Jack declared a transmitting slots on the DX cluster of 2200z and 2230z, but did not post them until 2204z !!. Listening was not feasible before 0030z here due to local noise but no decodable signals were seen at 0030z or 0100z. Cheers de Alan G3NYK JO02PB Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 645 invoked from network); 28 Dec 2000 01:14:47 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 28 Dec 2000 01:14:47 -0000 Received: (qmail 19938 invoked from network); 28 Dec 2000 01:09:36 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 28 Dec 2000 01:09:36 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BRPy-0007oC-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 00:59:42 +0000 Received: from imo-r17.mx.aol.com ([152.163.225.71] helo=imo-r17.mail.aol.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BRPx-0007o6-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 00:59:41 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from MarkusVester@aol.com by imo-r17.mx.aol.com (mail_out_v28.35.) id l.55.f199a3f (18255) for ; Wed, 27 Dec 2000 19:59:18 -0500 (EST) From: MarkusVester@aol.com Message-ID: <55.f199a3f.277bea66@aol.com> Date: Wed, 27 Dec 2000 19:59:18 EST Subject: LF: BPSK Tests To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: AOL 4.0.i for Windows 95 sub 70 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Andy, yesterday around 11:00 there was a 10 Hz wide patterned strip visible on Spectrogram 137.790 kHz which looked like a BPSK transmission from you. With about -3 dBuV/m, the spectral density was 8 dB above the noise, but I couldn't decode it yet as I haven't installed Bills software. It's the first time I have seen one of your sigs (new PA paying off ?), and I would really like to look at your MT Hell one day. Cheers de Markus, DF6NM in JN59NK From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 440 invoked from network); 28 Dec 2000 01:14:33 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 28 Dec 2000 01:14:33 -0000 Received: (qmail 13715 invoked from network); 28 Dec 2000 01:09:22 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Dec 2000 01:09:22 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BRQQ-0007or-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 01:00:10 +0000 Received: from imo-r18.mx.aol.com ([152.163.225.72] helo=imo-r18.mail.aol.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BRQO-0007o7-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 01:00:09 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from MarkusVester@aol.com by imo-r18.mx.aol.com (mail_out_v28.35.) id l.a9.f948dee (18255) for ; Wed, 27 Dec 2000 19:59:20 -0500 (EST) From: MarkusVester@aol.com Message-ID: Date: Wed, 27 Dec 2000 19:59:19 EST Subject: LF: VE1ZZ not seen, MM0ALM strong To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: AOL 4.0.i for Windows 95 sub 70 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi group, sad to say that in spite of several late sessions, I wasn't able to clearly identify Jack's transmission up to now. In 0.34 Hz spectrogram I usually see a constant carrier at 136.503 kHz (-13 dBuV/m), accompanied by a weaker fading line only a Hz down at 136.502, just above the noise. As this one seemed to go off sometime around 4:00 UT, I had suspected it to be VE1ZZ, but I could neither identify his call sign, nor did it stop at the end of the 10-minute periods. The next lines are 136.491 and .514, so if his freq were some 3 Hz lower or higher, things might become a little clearer here. Signals from Dave MM0ALM have become even stronger than before. He is now typically 23 dBuV/m in broad daylight and up to 27 dBuV/m in darkness. Amazing! 73 and all the best wishes Markus, DF6NM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 387 invoked from network); 28 Dec 2000 01:14:29 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 28 Dec 2000 01:14:29 -0000 Received: (qmail 13602 invoked from network); 28 Dec 2000 01:09:17 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Dec 2000 01:09:17 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BRQL-0007ol-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 01:00:05 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from imo-r16.mx.aol.com ([152.163.225.70] helo=imo-r16.mail.aol.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BRQK-0007o5-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 01:00:04 +0000 Received: from MarkusVester@aol.com by imo-r16.mx.aol.com (mail_out_v28.35.) id l.22.fc6ccec (18255) for ; Wed, 27 Dec 2000 19:59:15 -0500 (EST) From: MarkusVester@aol.com Message-ID: <22.fc6ccec.277bea62@aol.com> Date: Wed, 27 Dec 2000 19:59:14 EST Subject: LF: Slow Voice with frequency offset To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="------------090205030502090409040002" X-Mailer: AOL 4.0.i for Windows 95 sub 70 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: This is a multi-part message in MIME format. --------------090205030502090409040002 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit Dear Geri, Lionel, and LF group, playing with slow voice, I found that the main problem with simply time-stretching ("transposing") the audio spectrum is the slope of the transmitter's SSB filter. It is not steep enough to pass a lower band edge of about 75 Hz. One solution is to digitally shift the whole passband to the middle of the normal speech spectrum, eg. a 1/4-rate bandwidth of 1450 ... 2000 Hz above 1378 Hz zero beat. Such a function is not normally present in sound editing software, but by a combination of undersampling-aliasing and bandpass-filtering, an SSB mixer can be emulated. In the appended .txt file there is a description of how to (ab)use the GoldWave shareware sound-editor for this purpose. For receiving, you can reverse the procedure. An easier way for analog-minded people like me is to record the slow SSB signal from the RX (eg. Windows audio-recorder at 22050 samples per s), couple the PC's audio output to the antenna input of your VLF converter (tuned to 5.5 kHz USB, plus 4x any offset from the LF link), and replay the recording 4 times fast. Locally, the scheme worked amazingly well, now I'd like to try it out on the air. My preferred freq would be 136.88 kHz shifted zerobeat, 136.95 to 137.5 USB. With 16 mW radiated PEP this experiment will be rather restricted, so who of my neighbours would like to try? 73s de Markus, DF6NM --------------090205030502090409040002 Content-Type: text/plain; charset=windows-1252; name="SLOWVO~1.TXT" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="SLOWVO~1.TXT" How to produce time-expanded, frequency-compressed and passband-shifted SSB using the GoldWave sound editor by DF6NM, 26.12.2000 Basic principle: - start with 5512 Hz sampling, - equalize and filter, - resample to 22050 Hz causing aliasing around n*5512 Hz, - filter out USB spectrum above 5512 Hz, - reduce speed to 1/4. Working steps in GoldWave: Record voice using 11025 Hz sampling rate 1. 11025 sps 8bit -> 16bit 2. Lowpass 400 Hz (steepness 1, 6dB/oct to equalize sinc response of alias) 3. Bandpass 300...2500 Hz 3. (Volume *2) 4. Resample 5512 Hz 5. Resample 22050 Hz (causes the desired aliasing above 5512 Hz) 6. Bandpass 5800..8000 Hz (steepn. 20) 7. Volume *4 *4 *4 *4 8. Playback rate 11025 sps 9. Speed *0.5 10. Bandpass 1400...2100 Hz (steepn. 20) 11. (Volume *1.2 or nonlinear dynamics + Bandpass) 12. Save (8bit) Resulting SSB spectrum 1453...2003 Hz, zero beat 1378.12 Hz. Using Windows audio-recorder "sndrec32.exe" does not interrupt spectrogram while playing. --------------090205030502090409040002-- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18376 invoked from network); 28 Dec 2000 01:06:34 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 28 Dec 2000 01:06:34 -0000 Received: (qmail 13276 invoked from network); 28 Dec 2000 01:09:05 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Dec 2000 01:09:05 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BRPz-0007oI-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Dec 2000 00:59:43 +0000 Received: from imo-r17.mx.aol.com ([152.163.225.71] helo=imo-r17.mail.aol.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BRPx-0007o6-01 for rsgb_lf_group@blacksheep.org; Thu, 28 Dec 2000 00:59:42 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from MarkusVester@aol.com by imo-r17.mx.aol.com (mail_out_v28.35.) id l.e5.3e4ab7 (18255) for ; Wed, 27 Dec 2000 19:59:17 -0500 (EST) From: MarkusVester@aol.com Message-ID: Date: Wed, 27 Dec 2000 19:59:17 EST Subject: LF: Re: Off topic - Soundblaster AGC To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: AOL 4.0.i for Windows 95 sub 70 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Stewart, Andy, > ... I discovered that > the reason that I was not seeing the linear change with amplitude that > I was expecting was because there is some sort of vogad action > in the microphone audio input. Does anyone know: > > 1) How to turn this off > 2) If the same applies to the line input I'd be glad if I knew. Had exactly the same annoying problem, using a notebook with an ESS 1869 "audio drive" chip. Here, the AGC is active on all inputs, but only in the 8 bit mode. As it decays in visible discrete steps, I assume the audio is always sampled at full 16 bit depth, and the on-chip firmware tries to optimize the dynamic range when scaling down to 8 bits. My problem is that I don't know how to program the Windows interface, and from the DOS-box, I can only adress the chip in its 8 bit SoundBlaster compatible mode. I have even sent an email inquiry to ESS asking how to work around the AGC, but never got any response from them. 73 de Markus, DF6NM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16169 invoked from network); 27 Dec 2000 21:07:18 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 27 Dec 2000 21:07:18 -0000 Received: (qmail 24037 invoked from network); 27 Dec 2000 21:10:30 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 27 Dec 2000 21:10:30 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BNk2-0006qi-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Dec 2000 21:04:10 +0000 Received: from cmailg1.svr.pol.co.uk ([195.92.195.171]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BNk1-0006qd-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 21:04:09 +0000 Received: from modem-71.new-hampshire.dialup.pol.co.uk ([62.137.80.71] helo=lsear.freeserve.co.uk) by cmailg1.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14BNjt-0002oi-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 21:04:01 +0000 Message-ID: <004f01c07048$16c2df40$4750893e@lsear.freeserve.co.uk> From: "Lionel Sear" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Re: Slow Voice experiments Date: Wed, 27 Dec 2000 21:00:46 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.2106.4 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Apologies for bandwidth.....I meant to reply to Geri direct. Lionel G3PPT From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21142 invoked from network); 27 Dec 2000 20:54:42 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 27 Dec 2000 20:54:42 -0000 Received: (qmail 4162 invoked from network); 27 Dec 2000 20:57:13 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 27 Dec 2000 20:57:13 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BNVk-0006mf-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Dec 2000 20:49:24 +0000 Received: from jubilee.ns.sympatico.ca ([142.177.1.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BNVj-0006ma-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 20:49:23 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.83.38]) by jubilee.ns.sympatico.ca (Post.Office MTA v3.5.2 release 221 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Wed, 27 Dec 2000 16:49:13 -0400 Message-ID: <3A4A9C3D.A1C5F992@ns.sympatico.ca> Date: Wed, 27 Dec 2000 20:49:50 -0500 From: "John Currie" X-Mailer: Mozilla 4.7 [en]C-DIAL (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: lf 2 way Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all it is set . I will go to Jack's qth to provide receive capability. The weekend will be 1/12 and 1/13. I need help . I dont have transmit software for QRSS. Also something has changed with the Spectrogram I'm using . I must use full audio out of my ts-850 to see anything. This happened after I installed the older Spectran Any thoughts? 73 de VE1ZJ PS Glad to hear from Dave and Petr. Hope you can get on then From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 500 invoked from network); 27 Dec 2000 20:34:20 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 27 Dec 2000 20:34:20 -0000 Received: (qmail 1623 invoked from network); 27 Dec 2000 20:36:51 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 27 Dec 2000 20:36:51 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BNBu-0006l5-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Dec 2000 20:28:54 +0000 Received: from cmailg5.svr.pol.co.uk ([195.92.195.175]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BNBt-0006l0-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 20:28:53 +0000 Received: from modem-10.minnesota.dialup.pol.co.uk ([62.137.74.10] helo=lsear.freeserve.co.uk) by cmailg5.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14BNBk-0000qI-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 20:28:44 +0000 Message-ID: <001701c07043$28c51be0$0a4a893e@lsear.freeserve.co.uk> From: "Lionel Sear" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Slow Voice experiments Date: Wed, 27 Dec 2000 20:23:39 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.2106.4 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Geri, I have heard of Cool Edit but I have not downloaded it, but I will have a look using the URL you have provided. I am trying to make standalone programs using C++ Builder for convenience. For LF work I think that we need to slow down the audio at least 8 times into 250Hz and I think I know how to try this. However, I do not think that the LF people are particularly interested in this which is why I am replying to you direct. There may be more demand from the meteor scatter people who need to slow High speed Morse down but without the drop in pitch that they get now by using recording techniques. I think I will tackle that one first. 73 Lionel G3PPT -----Original Message----- From: 'Geri' Kinzel, DK8KW To: INTERNET:rsgb_lf_group@blacksheep.org Date: Sunday, December 24, 2000 1:29 PM Subject: LF: Slow Voice experiments Lionel, G3PPT wrote: > As far as slow audio goes, I wonder if it would be possible to record 2 kHz > bandwidth speech into a .WAV file at 44100Hz and then alter the sampling > frequency in the file header to 11025Hz. Playing this would result in the > speech with a duration four times as long but in one quarter the bandwidth. > The frequency band would span 1 to 500Hz, so this would need to be > transposed up to 300-800Hz in order to go through an SSB filter. Reception > could be by similar techniques to those used in QRSS.EXE referred to above > but with a further transposition to restore the original pitch. With the > SB16 card, it would be possible to play a .WAV file at 5513Hz though a 250Hz > bandwidth but not all soundcards allow the choice of non standard > frequencies Lionel, Cool Edit 2000 (http://www.syntrillium.com/) has a transpose feature, in which you can transform the speed and make a recorded message four times longer, reducing the bandwidth. You can do the opposite, too. I tried to push a 100 to 900 Hz (so within the DL 800 Hz bandwidt limitation) message created with Cool Edit through my PA/antenna configurarion ... sounded terribly awful and distorted! I suppose, the antenna bandwidth is too small and the PA not really linear enough ... I will do futher experiments. Please everyone feeling disturbed please feel free to tell me immediately ... I don't want to block the entire band ... Best 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21579 invoked from network); 27 Dec 2000 18:07:43 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 27 Dec 2000 18:07:43 -0000 Received: (qmail 10070 invoked from network); 27 Dec 2000 18:10:56 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 27 Dec 2000 18:10:56 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BKwx-0006Ez-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Dec 2000 18:05:19 +0000 Received: from ins22.netins.net ([167.142.225.22] helo=smtp-out.netins.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BKww-0006Eu-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 18:05:18 +0000 Received: from netins.net (desm-24-52.dialup.netins.net [167.142.21.181]) by smtp-out.netins.net (8.9.3/8.9.3) with ESMTP id MAA31527 for ; Wed, 27 Dec 2000 12:05:09 -0600 (CST) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A4A2F54.3E7EDA2A@netins.net> Date: Wed, 27 Dec 2000 12:05:08 -0600 From: "Doc Gruis" Organization: http://www.gruis.org X-Mailer: Mozilla 4.75 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: Excellent post! Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: John, Eccellent post re: Big/small Antennae. I even feel the same frustration on 160 because of all my years in A.M. broadcast! Doc, K0HTF & "D" From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 299 invoked from network); 27 Dec 2000 18:07:32 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 27 Dec 2000 18:07:32 -0000 Received: (qmail 23778 invoked from network); 27 Dec 2000 18:02:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 27 Dec 2000 18:02:23 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BKoo-0006Cf-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Dec 2000 17:56:54 +0000 Received: from imo-r04.mx.aol.com ([152.163.225.4]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BKom-0006Ca-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 17:56:52 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from WarmSpgs@aol.com by imo-r04.mx.aol.com (mail_out_v28.35.) id l.79.e2795b3 (16786) for ; Wed, 27 Dec 2000 12:56:08 -0500 (EST) From: WarmSpgs@aol.com Message-ID: <79.e2795b3.277b8737@aol.com> Date: Wed, 27 Dec 2000 12:56:07 EST Subject: Re: LF: Big/small antennas. To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: AOL 4.0 for Windows 95 sub 120 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Walter is quite right, of course, that amateurs are not bound by the 24hr - 365 days/year service requirements imposed upon professional LF systems engineers. However, the examples he cites abundantly demonstrate that the tradeoffs amateurs sometimes have to make are still poor engineering practice, even if not intended for professional ends. The use of kilowatts of transmitter power to produce 1W ERP imposes a burdensome cost on what is fundamentally a hobby activity, results in serious electrical and (potentially) fire safety hazards, and requires extraordinary effort to satisfy the neighbors' aesthetic values and keep their television receivers happy. Let me be very clear: I'm absolutely NOT a big-antennas-or-nothing advocate. I realize that not everyone has hectares of open land, and may have to adapt to their surroundings. On the other hand, I also hold the view that RF egalitarianism is not always feasible, and at some point we have to accept that LF in a garden plot is not likely to achieve 1W ERP unless we can throw almost as much money and/or work into the transmitter as we would into an "antenna farm." Nor does it matter that we radiate 1W if we can't receive as far as we transmit, thanks to urban or suburban noise levels on LF. Our goals have to fit our means. Where I live, I'm surrounded by neighbors who watch a distant TV station on US channel 2. The result is that I cannot reasonably figure to work DX on 6m. By the time I resolved all the RFI issues, I would have to pawn most of my radio gear. Therefore, I must plan the occasional field expedition if I choose to work 6m. We will have a very serious limitation over here, if or when the FCC approves LF ham regulations. The "California kilowatt" stations won't be on this side of the pond. You may be aware that a 2W ERP limit has been proposed. However, out of safety and EMC concerns, a 200W PEP transmitter power limit has also been proposed. There won't be any 3kW transmitters here. We will just plain _have_ to do the job with semi-efficient antenna systems! Hence, not every US ham who wants to participate on LF will be able to do so; at least, not at anything remotely approaching maximum radiated power. Again, let me emphasize: I am NOT advocating big-antennas-or-nothing. I'm happy for anyone who wants to try radiating from a Tesla coil in the garden to do so. I'm only saying that understanding the reasons behind professional practice will let us have more realistic expectations about what we should expect from the resources available to us. 73, John KD4IDY From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16190 invoked from network); 27 Dec 2000 17:50:38 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 27 Dec 2000 17:50:38 -0000 Received: (qmail 7069 invoked from network); 27 Dec 2000 17:53:10 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 27 Dec 2000 17:53:10 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BKfY-00069P-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Dec 2000 17:47:20 +0000 Received: from cobalt7-ps.global.net.uk ([195.147.248.167]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BKfU-00069K-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 17:47:17 +0000 Received: from p56s05a02.client.global.net.uk ([195.147.149.87] helo=spencer) by cobalt7-ps.global.net.uk with smtp (Exim 2.12 #1) id 14BKbw-00021R-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 17:43:36 +0000 Message-ID: <002c01c0702d$087b2020$3bdb93c3@spencer> From: "Bernard Spencer" To: rsgb_lf_group@blacksheep.org Subject: LF: LF Big/small antennas Date: Wed, 27 Dec 2000 17:46:32 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2014.211 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Walter, Enjoyed reading your points on LF antennas. It took me back a long time, and was nodding my head in agreement with almost every word - so much that I forgot to pour the Glenfiddich. Later they got me to muck about with Low Profile Antennas, but that was at VHF/UHF where the considerations are not the same! Happy New Year to All 73 Bernard G3SMW From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14412 invoked from network); 27 Dec 2000 17:16:19 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 27 Dec 2000 17:16:19 -0000 Received: (qmail 27976 invoked from network); 27 Dec 2000 17:18:50 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 27 Dec 2000 17:18:50 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BK7F-00062X-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Dec 2000 17:11:53 +0000 Received: from mail12.svr.pol.co.uk ([195.92.193.215]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BK7D-00062S-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 17:11:52 +0000 Received: from modem-858.hoary-redpoll.dialup.pol.co.uk ([62.137.199.90] helo=default) by mail12.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14BK72-0001Gr-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 17:11:40 +0000 Message-ID: <000001c07027$589ea000$5ac7893e@default> From: "MAL HAMILTON" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: re ZZ es ALM Date: Wed, 27 Dec 2000 11:42:31 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: -----Original Message----- From: John Currie To: rsgb_lf_group@blacksheep.org Date: 26 December 2000 22:27 Subject: LF: re ZZ es ALM >Spoke with Jack agn tonight. He es MM0ALM have been trying for normal >cw qso. Jack has heard MM0ALM but not well enough for contact . Glad Dave/MM0ALM is making it across to Jack. That is a good sign and probably the first time a signal from the UK has actually been heard in VE on 136 khz. I will be in GI/TYRONE again in February and hope to try a qso with Jack if he is available then. The Tyrone qth is ideal, out in the country, no environmental noise and acres of space for antennas and a good ground system. It is only 5 miles west of Lough Neagh and 40 miles from the North Atlantic coast. That should be an added advantage with all that water. Maybe we should get an expedition together. The antenna mast is already installed and 120 ft high. An alternative qth would be on the beach at Portstewart. This beach is 6 miles long and parking of vehicles is permitted all the year round. Kites or balloons could be used to support a vertical. There is a requirement to inform Aldergrove ATC so that a NOTAM can be issued for the area when the event is taking place. Further round the coast to the West is another even larger beach area with vehicle access for 8 miles at Benone. At this site there is a possibility of the kite if high enough and at the right angle overflying Donegal in EI out towards Finbar !!!!!!!!! The shack in GI and the antenna in EI !!!!!!!!!!!!!!!!!!!!! Could be interesting. Two countries worked for the price of one !!!!!!!! G3KEV > > 73 de John VE1ZJ > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4392 invoked from network); 27 Dec 2000 15:52:38 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 27 Dec 2000 15:52:38 -0000 Received: (qmail 24589 invoked from network); 27 Dec 2000 15:47:28 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 27 Dec 2000 15:47:28 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BId4-0005el-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Dec 2000 15:36:38 +0000 Received: from mail12.svr.pol.co.uk ([195.92.193.215]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BId3-0005eg-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 15:36:37 +0000 Received: from modem-73.brethil.dialup.pol.co.uk ([62.136.143.73] helo=lvm) by mail12.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14BIcv-0007ZT-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 15:36:30 +0000 Message-ID: <001601c0701b$4213ddc0$498f883e@lvm> From: "LAWRENCE MAYHEAD" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: lf 2 way Date: Wed, 27 Dec 2000 15:39:52 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Seems like a great idea to me John.There are now several more stations getting closer to the 1W limit than when you saw Dave G0MRF and peter back in September.Sop lets have a go.Best wishes for the New Year. Laurie -----Original Message----- From: John Currie To: rsgb_lf_group@blacksheep.org Date: 26 December 2000 19:05 Subject: LF: lf 2 way >I may try to visit Jack VE1ZZ and try for 2-way qso . Thinking about >Jan 12 and 13., 2001 . > Any chance of another try for balloon supported vert or something >that weekend ? > 73 es happy new year John VE1ZJ > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 241 invoked from network); 27 Dec 2000 14:12:03 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 27 Dec 2000 14:12:03 -0000 Received: (qmail 11746 invoked from network); 27 Dec 2000 14:15:15 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 27 Dec 2000 14:15:15 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BHGK-0005Ll-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Dec 2000 14:09:04 +0000 Received: from fm215.facility.pipex.com ([194.131.104.225]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BHGJ-0005Lg-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 14:09:03 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from 233.pncl.co.uk (202.234.35.212.in-addr.arpa.ip-pool.cix.co.uk [212.35.234.202]) by fm215.facility.pipex.com (8.9.3/8.9.3) with ESMTP id OAA20491 for ; Wed, 27 Dec 2000 14:04:56 GMT Message-ID: <5.0.2.1.2.20001227104754.00a1bec0@mail.pncl.co.uk> X-Sender: blanch@mail.pncl.co.uk (Unverified) X-Mailer: QUALCOMM Windows Eudora Version 5.0.2 Date: Wed, 27 Dec 2000 14:08:35 +0000 To: rsgb_lf_group@blacksheep.org From: "Walter Blanchard" Subject: LF: Big/small antennas. MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit Hello gang,

Since our professional controversialist ('3KEV) has raised the big/small antenna discussion again, and I'm fed up playing Scrabble, here's a few points he might like to ponder on while he's drinking in the New Year:

The "professional" antenna/system engineer's job is to provide a guaranteed signal at all times 24hrs/day, 365 days a year. If it is a navigational system, as we had in Decca, not just guaranteed field strength but guaranteed phase stability as well, to better than 10 degs.  You can't do that with a piece of wire waving in the wind; coils of unknown and variable characteristics, poor earth systems, etc.  And you want to minimise skywave as much as possible; it's just a nuisance. So you go for a vertical, the bigger the better, not particularly because it radiates better but because the bigger it is the more predictable and stable it is.  You want absolutely stable characteristics whether it's wet, loaded with ice, covered in snow, or blowing a Force 12 gale.  And you don't want to pay for a team of skilled engineers to be permanently on site 24 hrs/day to re-tune it every time something changes.  Automatic tuning can do a bit for you but not everything.
Then there's cost. A big antenna costs a lot in initial purchase and annual maintenance, sure, but not as much as installing a 2 megawatt transmitter and paying for its maintenance and the electricity it consumes.  Some high-powered Russian navigation transmitters have gone off the air recently because they couldn't afford the electricity bill.  You have to look at where your income is coming from and whether it will support the running costs of the high-powered transmitter you're going to have to put in because you're only going to have a little aerial.  Years ago I used to have to do this sort of calculation and believe you me the big antenna is cheaper and a good deal less trouble in the long run.

This is apart from the sheer engineering consideration of how much field strength you need and where. The BBC consider that at LF they need a minimum of 1 millivolt/metre to get a signal into a little tranny in a block of flats in a city.  This is about S9+60 db by amateur standards (please, no arguments about what amateur S-points mean!) and results in things like the 400 kW e.r.p Droitwich transmitter to serve only a 200-mile radius but which can be heard in America quite often.  Note, incidentally, that as pointed out by others, range depends ONLY on e.r.p. in the direction you want, it doesn't matter how you produce it. And yes, if it was possible to get 1W radiated out of a 10 foot vertical antenna at 136 kHz it would work just as well as 1W out of a 600 ft vertical. At 136 kHz all antennas are tiny and radiate omni-directionally in the vertical plane. The differences would be you would need something like a 25 kW transmitter instead of a 2.5W tiddler; as soon as it got foggy everything would arc over;  it would be impossible to keep loaded efficiently even if you sat with one hand on a tuning control, you would have to spend a lot of money on very good insulators, (and go out and polish them every few hours), etc, etc.  In other words, totally impracticable if you want 24hr availability.  And yes, I have tried it, about 30 years ago we tried to radiate a 100 kHz signal off a 10 ft stick (coil, actually) ; in perfectly dry conditions (Arizona desert)  it (sort of) worked, but it never worked in England for more than a few minutes. Theory 10, practicality 0.  As a matter of interest we eventually made the system work reliably around the North Sea by using 180 footers (it was a variety of Loran-C in case anyone's interested - closed down some years ago in favour of DGPS).

As amateurs we might well decide it's worth living with a lot of this aggro just to get those few minutes across the Atlantic, but professionally you can forget it. So please stop making silly comparisons between amateur and professional practice. Quite a lot of  us "amateurs" are also "professionals" but find "amateur" work liberating after the irritating constraints of a lot of "professional" work.

My goodness, this bottle of "Glenfiddich" has gone down rather quickly - and it's not even the New Year yet!

Happy New Year, Gluckliches Neues Jahr (sorry I don't know any Dutch, Swedish or Finnish!)

Walter G3JKV.

  From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1170 invoked from network); 27 Dec 2000 13:36:41 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 27 Dec 2000 13:36:41 -0000 Received: (qmail 10452 invoked from network); 27 Dec 2000 13:39:53 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 27 Dec 2000 13:39:53 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BGhq-0005E4-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Dec 2000 13:33:26 +0000 Received: from imo-r11.mx.aol.com ([152.163.225.65] helo=imo-r11.mail.aol.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BGhl-0005Dz-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 13:33:21 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from G0MRF@aol.com by imo-r11.mx.aol.com (mail_out_v28.35.) id l.be.de13cd9 (4564) for ; Wed, 27 Dec 2000 08:32:38 -0500 (EST) From: G0MRF@aol.com Message-ID: Date: Wed, 27 Dec 2000 08:32:38 EST Subject: Re: LF: VE1ZZ beacon, nil tonight in Germany To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: AOL 5.0 for Windows sub 105 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In a message dated 12/27/00 7:02:42 AM GMT Standard Time, DK8KW@compuserve.com writes: << I will be QRV January 12/13, although I believe that stations in the UK have a better chance to reach you (first they have more ERP, second they are 1000 km closer to you ... but I am sure it is fun to watch!). >> Your report of VE1ZZ is very interesting Geri. For us in the UK, Larry VA2LK is about 1000km further west than Jack. This suggests that it should be possible for us to receive a narrowband signal from Larry without too much trouble. It looks as though the extra 1000km does not add numerous 10's of dB after all. How about it Larry / John / Jack? Maximum effort from all of us on 12/13 Jan 20mins East to West and then 20 minutes in the other direction? If CFH is back on by then reception at VE1ZZ may be impossible. I wonder if it's possible to link the images from John's QTH out to Jack's location Nr CFH? Just a thought. 73 David G0MRF From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11546 invoked from network); 27 Dec 2000 11:00:59 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 27 Dec 2000 11:00:59 -0000 Received: (qmail 13775 invoked from network); 27 Dec 2000 11:03:30 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 27 Dec 2000 11:03:30 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BEHV-0004gF-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Dec 2000 10:58:05 +0000 Received: from mailout04.sul.t-online.com ([194.25.134.18]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BEHU-0004gA-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 10:58:04 +0000 Received: from fwd06.sul.t-online.com by mailout04.sul.t-online.com with smtp id 14BEHN-000185-05; Wed, 27 Dec 2000 11:57:57 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from (0482183881-0001@[193.159.25.241]) by fwd06.sul.t-online.com with smtp id 14BEHD-1dQ1MeC; Wed, 27 Dec 2000 11:57:47 +0100 From: "jannsen" <0482183881-0001@t-online.de> To: rsgb_lf_group@blacksheep.org Subject: LF: RYCOM X-Mailer: T-Online eMail 2.34 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Date: Wed, 27 Dec 2000 11:57:47 +0100 Message-ID: <14BEHD-1dQ1MeC@fwd06.sul.t-online.com> X-Sender: 0482183881-0001@t-dialin.net Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: hay gents, I`ve got the rx "rycom r1307a/gr ser no 674" (115 volt). I`m not prepared for the minute, the rx will "give up it`s soul", because of lacking it`s wiring diagram. has any of you got that sheets for that type of rx ? pse do tell me. by the way, I use the rycom as a frontend-part fitting it`s IF into a trc ft767gx with a 136-khz-filter (homebrew) betw. antenna and input. interested in my equipm.? pse look up "dj8wx/qsl.net". vy 73 / hpy ny Uwe (dj8wx@qsl.net) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4863 invoked from network); 27 Dec 2000 10:53:37 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 27 Dec 2000 10:53:37 -0000 Received: (qmail 29075 invoked from network); 27 Dec 2000 10:56:08 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 27 Dec 2000 10:56:08 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BEAQ-0004dh-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Dec 2000 10:50:46 +0000 Received: from cmailg6.svr.pol.co.uk ([195.92.195.176]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BEAP-0004dc-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 10:50:46 +0000 Received: from modem-19.aerin.dialup.pol.co.uk ([62.136.98.147] helo=lvm) by cmailg6.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14BEAH-0000PX-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 10:50:38 +0000 Message-ID: <000201c06ff3$52be1960$9362883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re.Re.VE1ZZ etc Date: Wed, 27 Dec 2000 10:53:25 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Mal and All, Yes of course its easier to get power into a large/high antenna,and if its on good ground with miles of radials and not surrounded by trees etc,less power will be lost .BUT as amateurs we dont have these ideal conditions so the challenge is to do our best with what we do have.My point is that these problems can be overcome and at the end of the day 1W is 1W wether it comes from 3W into a DECCA mast or from Andys 3Kw into his short /low back garden antenna. Best wishes to all Laurie. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7076 invoked from network); 27 Dec 2000 10:20:09 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 27 Dec 2000 10:20:09 -0000 Received: (qmail 8507 invoked from network); 27 Dec 2000 10:14:59 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 27 Dec 2000 10:14:59 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BDWl-0004Ug-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Dec 2000 10:09:47 +0000 Received: from fortune-rwcmta.excite.com ([198.3.99.203] helo=fortune.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BDWk-0004Ua-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 10:09:47 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by fortune.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001227100906.MDFL9490.fortune.excite.com@almond.excite.com> for ; Wed, 27 Dec 2000 02:09:06 -0800 Message-ID: <13841200.977911746602.JavaMail.imail@almond.excite.com> Date: Wed, 27 Dec 2000 02:09:01 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: VE1ZZ beacon, nil tonight in Germany MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 62.253.64.5 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Geri, I don't know about you, but no how big the hard discs become they very quickly become full. I am still waiting for the Terra byte discs, or should I say Terror, because Microsoft will fill them full of unfathomable bug-ridden software. Hope you are enjoying your Christmas break. John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28960 invoked from network); 27 Dec 2000 08:59:48 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 27 Dec 2000 08:59:48 -0000 Received: (qmail 19387 invoked from network); 27 Dec 2000 09:02:20 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 27 Dec 2000 09:02:20 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BCNL-0004Fg-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Dec 2000 08:55:59 +0000 Received: from [195.47.110.226] (helo=dell1.cz.gmc.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BCNK-0004Fb-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 08:55:58 +0000 Received: from p (p.maly.cz.gmc.net [192.168.1.22]) by dell1.cz.gmc.net with SMTP (Microsoft Exchange Internet Mail Service Version 5.5.2650.21) id YZSJ616A; Wed, 27 Dec 2000 09:55:40 +0100 Message-ID: <00dc01c06fe2$7ce2bc20$1601a8c0@maly.cz.gmc.net> From: "Petr Maly" To: rsgb_lf_group@blacksheep.org References: <3A4930BB.B52707BE@ns.sympatico.ca> Subject: LF: Re: lf 2 way Date: Wed, 27 Dec 2000 09:53:31 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2014.211 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I could possibly activate the 150 m hight T-antenna again. 73 Petr OK1FIG ----- Original Message ----- From: To: Sent: Wednesday, December 27, 2000 12:58 AM Subject: LF: lf 2 way > I may try to visit Jack VE1ZZ and try for 2-way qso . Thinking about > Jan 12 and 13., 2001 . > Any chance of another try for balloon supported vert or something > that weekend ? > 73 es happy new year John VE1ZJ > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6260 invoked from network); 27 Dec 2000 07:04:29 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 27 Dec 2000 07:04:29 -0000 Received: (qmail 1219 invoked from network); 27 Dec 2000 07:07:01 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 27 Dec 2000 07:07:01 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BAWa-0003pz-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Dec 2000 06:57:24 +0000 Received: from hs-img-6.compuserve.com ([149.174.177.155] helo=sphmgaaf.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BAWZ-0003pu-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 06:57:23 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by sphmgaaf.compuserve.com (8.9.3/8.9.3/SUN-1.9) id BAA19466 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 01:57:07 -0500 (EST) Date: Wed, 27 Dec 2000 01:56:53 -0500 From: "Holger 'Geri' Kinzel, DK8KW" Subject: LF: VE1ZZ beacon, nil tonight in Germany To: rsgb_lf_group@blacksheep.org Message-ID: <200012270157_MC2-BFE0-15F7@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Alan and LF Group, >Hi all, VE1ZZ beacon was not visible at 2400z but was a good "O" at 0030< No signs of VE1ZZ this night on my EasyGram recordings that I took every 10 minutes. I saw another station below 136.500, starting at about 136.485 and moving up in frequency about 10 Hz and a few traces of a signal at around 136.515 Hz that was a couple of Hertz wide. I will keep watching throughout the next nights (with those large couple-of-dozent Gigabyte hard-discs nowadays that is no problem ...). John, VE1ZJ: excellent idea that the station with the appropriate receiving equipment makes a dx-pedition to the station that has the transmitting capabilities! I will be QRV January 12/13, although I believe that stations in the UK have a better chance to reach you (first they have more ERP, second they are 1000 km closer to you ... but I am sure it is fun to watch!). Best 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19951 invoked from network); 27 Dec 2000 06:53:48 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 27 Dec 2000 06:53:48 -0000 Received: (qmail 10863 invoked from network); 27 Dec 2000 06:56:59 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 27 Dec 2000 06:56:59 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14BAM8-0003nG-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Dec 2000 06:46:36 +0000 Received: from mta01.talk21.com ([62.172.192.171] helo=t21mta01-app.talk21.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14BAM7-0003nB-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 06:46:35 +0000 Received: from dave ([213.120.20.41]) by t21mta01-app.talk21.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001227064441.EGFA19366.t21mta01-app.talk21.com@dave> for ; Wed, 27 Dec 2000 06:44:41 +0000 Message-ID: <000701c06fd0$865d0e20$291478d5@dave> From: "Dave Sergeant" To: "rsgb_lf_group" Subject: LF: re:e-groups Date: Tue, 26 Dec 2000 18:28:22 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=Windows-1252; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: >From Dave G3YMC There were a few mails in my inbox after I returned after Christmas (among the 260 or so there...) comparing speed of delivery between e-groups and the blacksheep reflector we use. As someone also who subscribes to several e-goup lists I can confirm that they do indeed offer an incredibly quick and reliable service - mails sent often arrive in my inbox during the same connect as they are sent! However the blacksheep reflector has served us well for quite a few years now, and although there have been the occasional outages in general it offers a perfectly reliable service. For most of us it matters little whether the message is delivered in 30 seconds or 5 minutes and we should by no means criticise the service offered. Bear in mind that the service was set up well before the likes of egroups became common place, and I would like to echo a vote of thanks to the blacksheep team (of one, I believe!) who has maintained the excellent service over the years. 73s Dave G3YMC sergeantd@compuserve.com dsergeant@iee.org http://ourworld.compuserve.com/homepages/sergeantd From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24260 invoked from network); 27 Dec 2000 00:51:02 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 27 Dec 2000 00:51:02 -0000 Received: (qmail 25137 invoked from network); 27 Dec 2000 00:54:13 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 27 Dec 2000 00:54:13 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14B4kR-0002Wc-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Dec 2000 00:47:19 +0000 Received: from [194.73.73.138] (helo=ruthenium) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14B4kQ-0002WX-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 00:47:18 +0000 Received: from [213.1.192.19] (helo=default) by ruthenium with smtp (Exim 3.03 #83) id 14B4kI-0000bu-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Dec 2000 00:47:10 +0000 Message-ID: <000701c06f9e$91dd76e0$13c001d5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: VE1ZZ beacon Date: Wed, 27 Dec 2000 00:46:21 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all, VE1ZZ beacon was not visible at 2400z but was a good "O" at 0030, (including a 1Hz jump HF after the first call-sign) I think my local noise may have decreased just after 2400z. Unfortunately we still have nothing to compare conditions with but Jack does seem to be very consistent. Cheers de Alan G3NYK JO02PB Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27745 invoked from network); 26 Dec 2000 23:03:45 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 26 Dec 2000 23:03:45 -0000 Received: (qmail 29444 invoked from network); 26 Dec 2000 23:06:54 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 26 Dec 2000 23:06:54 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14B34f-00024t-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Dec 2000 23:00:05 +0000 Received: from smtp-1.visp.telinco.net ([212.1.130.1]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14B34e-00024o-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Dec 2000 23:00:05 +0000 Received: from [212.1.135.40] (helo=g4jnt) by smtp-1.visp.telinco.net with smtp (Exim 3.16 #1) id 14B2lD-00066G-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Dec 2000 22:40:00 +0000 Message-ID: <002c01c06f8d$6f923aa0$288701d4@g4jnt> From: "Andrew Talbot" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Off topic - Soundblaster programming Date: Tue, 26 Dec 2000 22:44:40 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.1 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I don't know about the mic input, I woulf have thought an ALC action on this input was rather dependant on the particular machine / soundcard in use, but it certainly does not apply to the line input - at least I've never seen it on a wide range of soundcards over the years. Do you ned to make your measurements in real time ? If you can save to a .WAV file using a prog like sound recorder, or even Spectrogram, you'll have a lot more flexibility in what can be measured. The .WAV file has quite a straightforward file structure if you want to write your own software. I have made considerable use of this technique for comms signal analysis and synthesis and never had any non-linear effects other than those caused by genuine analogue side problems ! Andy G4JNT > >I know that it is off topic, and I apologies, but there is a good >chance that the expertise will be on this list, and its always >best to ask friends first. > >I am trying to measure the absolute value of an audio signal >using the sound (microphone) input on my PC. (For a radio >application, but not LF). > >Having beat my head against various brick walls until 2am the last >few nights I now have a program that can get the samples from >the sound card. After further beating of head, I discovered that >the reason that I was not seeing the linear change with amplitude that >I was expecting was because there is some sort of vogad action >in the microphone audio input. Does anyone know: > >1) How to turn this off >2) If the same applies to the line input > >If anyone has an example program for simple audio input via Vbasic >that would be even better. > >There is a Vbasic code example that shows the use of the volume >feature of the SB card to measure amplitude, but when I tried >it (before I realised that vogad was going on) it seemed >to have some strange semi log characteristic (ie it stayed constant >and then suddenly increased as I varied the amplitude through the >mixer control). Has anyone else had any experience making linear >measurements through this feature? > >Thanks in advance to anyone that can help > >73 > >Stewart G3YSX > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27511 invoked from network); 26 Dec 2000 22:31:26 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 26 Dec 2000 22:31:26 -0000 Received: (qmail 13192 invoked from network); 26 Dec 2000 22:26:18 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 26 Dec 2000 22:26:18 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14B2R4-0001vA-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Dec 2000 22:19:10 +0000 Received: from jubilee.ns.sympatico.ca ([142.177.1.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14B2R3-0001v5-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Dec 2000 22:19:09 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.52.26]) by jubilee.ns.sympatico.ca (Post.Office MTA v3.5.2 release 221 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Tue, 26 Dec 2000 18:18:38 -0400 Message-ID: <3A495FB1.D5350E56@ns.sympatico.ca> Date: Tue, 26 Dec 2000 22:19:13 -0500 From: "John Currie" X-Mailer: Mozilla 4.7 [en]C-DIAL (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: re ZZ es ALM Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Spoke with Jack agn tonight. He es MM0ALM have been trying for normal cw qso. Jack has heard MM0ALM but not well enough for contact . 73 de John VE1ZJ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10936 invoked from network); 26 Dec 2000 19:58:58 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 26 Dec 2000 19:58:58 -0000 Received: (qmail 25394 invoked from network); 26 Dec 2000 20:01:27 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 26 Dec 2000 20:01:27 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14B093-0001OE-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Dec 2000 19:52:25 +0000 Received: from smtp03.wxs.nl ([195.121.6.37]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14B092-0001O9-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Dec 2000 19:52:24 +0000 Received: from default ([195.121.216.41]) by smtp03.wxs.nl (Netscape Messaging Server 4.15) with SMTP id G66XU101.64V for ; Tue, 26 Dec 2000 20:51:37 +0100 Message-ID: <001e01c06f75$24d26980$29d879c3@default> From: "ko versteeg" To: rsgb_lf_group@blacksheep.org Subject: LF: EI0CF Date: Tue, 26 Dec 2000 20:50:43 +0100 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="------------060500070409060806010905" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.1 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: This is a multi-part message in MIME format. --------------060500070409060806010905 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit Hi All.. Received EI0CF, perhaps old hat for most but perhaps usefull for the op. to see how it came in here. Used Spectran 0.49hz and perhaps too slow :-) See attachement once again, locator please. 73 de Ko, NL9222 http://leden.tref.nl/~nl9222tv/default.htm (OUT AT TIMES) http://home.wanadoo.nl/nl9222/index.htm --------------060500070409060806010905 Content-Type: image/jpeg; name="EI0CF02.jpg" Content-Transfer-Encoding: base64 Content-Disposition: inline; filename="EI0CF02.jpg" /9j/4AAQSkZJRgABAQEASABIAAD/2wBDAA0JCgsKCA0LCwsPDg0QFCEVFBISFCgdHhghMCoy MS8qLi00O0tANDhHOS0uQllCR05QVFVUMz9dY1xSYktTVFH/2wBDAQ4PDxQRFCcVFSdRNi42 UVFRUVFRUVFRUVFRUVFRUVFRUVFRUVFRUVFRUVFRUVFRUVFRUVFRUVFRUVFRUVFRUVH/wAAR CAAhAnYDASIAAhEBAxEB/8QAGgAAAgMBAQAAAAAAAAAAAAAAAAMCBAUBBv/EAEAQAAIBAgQD BAcGBAYBBQAAAAECAwARBBIhMQVBURMiYXEGMjM0crHBFCNzgZGhNULh8ENSgrLR8UQVFoPC 0v/EABkBAQEBAQEBAAAAAAAAAAAAAAABAgMEBf/EACURAQEAAgICAQMFAQAAAAAAAAABAhEh MRJBAxNRYTJCcYHwwf/aAAwDAQACEQMRAD8A8PYrlW1ydiOZ8qaZiXCmMWB0VrX/AD0oaYGY ElwEIGn61NmJLs7SK1r9b196fy8itIo7XIxOY6XG3hTYmeOW7IoGoYtrTopkjbMAWAbML6d7 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rRCH3pfxPpQ+7fn8qKKzOqFJ6kXxVOH2cnxL86KKzj6/3pUsX7V/jqP+GvwGiir+6odPuPwx UI/bCiit+ws+8R+Q+dWF9RPib50UVnH9VVGP1ZfKmYj14/gT60UVpHOTebfOq0Xu5+A/Oiis 3uf77DXw/sn+FfnVYe/Q/iH5UUV0oQ3v5/F/5qzw33yP8VvkaKKxAuX2mJ+P/iqa7p5r9KKK ZDVb3CD8OT/ctZcXvCfG1FFL2NmD3VfgWrh9vD+HRRW1IwnukX4klZsfvWE/BHyoorNE8L/E pvjHzqXFvZp8NFFX0itL/CIviH0q2fch+GvzoorOPf8ASk4v3ofD9as4j2E/wj5Ciitor4j1 4PwKVgvdp/jX6UUVi9xVo+r/AKG+lV8L72fL/miitout7dfxP/qaoN7tL8K/NqKKzQ2P+IYb yHyrifxVPgWiil7F6X2WF/1VRT15/jX5iiitCzhfbr8f1pHHv4lRRWcldPt4/jHyFVZ/4nN+ ItFFMvSGL/EYPxD/ALqhiPdpPif5miipeqqR9s3mP9tQi/i+E81ooqZ9f3/0jSH8Qf8AOsx/ XPxH5miit1FzA+xk8x8hWefZzedFFS9B8f8A4/mfmaZi/fB8Y+YoopOg2b3yP4voanw3bE/G KKKvsT45/wCN8Cf7mpHD/YN5n50UVJ2q0/scT+F9azcR7eH++Yooq3pHJPaw/C/zNMxnt18k +RoorM9iGF9cfGf9ppuK9gPwzRRWvQqr7SH8/pWngvdl+P60UVMQYb2qfiv8jVvGf434J+VF FVWGnqx+bfOuS+0Tz/8AzRRU9ItY72z/AIifIV2f3IfCtFFUN4zvD8NFFFSq/9k= --------------060500070409060806010905-- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26129 invoked from network); 26 Dec 2000 19:01:01 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 26 Dec 2000 19:01:01 -0000 Received: (qmail 14039 invoked from network); 26 Dec 2000 19:04:12 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 26 Dec 2000 19:04:12 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AzIp-0001Cv-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Dec 2000 18:58:27 +0000 Received: from jubilee.ns.sympatico.ca ([142.177.1.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AzIo-0001Cq-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Dec 2000 18:58:26 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.65.8]) by jubilee.ns.sympatico.ca (Post.Office MTA v3.5.2 release 221 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Tue, 26 Dec 2000 14:58:16 -0400 Message-ID: <3A4930BB.B52707BE@ns.sympatico.ca> Date: Tue, 26 Dec 2000 18:58:51 -0500 From: "John Currie" X-Mailer: Mozilla 4.7 [en]C-DIAL (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: lf 2 way Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I may try to visit Jack VE1ZZ and try for 2-way qso . Thinking about Jan 12 and 13., 2001 . Any chance of another try for balloon supported vert or something that weekend ? 73 es happy new year John VE1ZJ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29676 invoked from network); 26 Dec 2000 18:39:38 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 26 Dec 2000 18:39:38 -0000 Received: (qmail 1432 invoked from network); 26 Dec 2000 18:42:08 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 26 Dec 2000 18:42:08 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Ayx5-00017A-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Dec 2000 18:35:59 +0000 Received: from jaws.cisco.com ([198.135.0.150] helo=cisco.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Aywu-000175-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Dec 2000 18:35:49 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from virgin.net (stbryant-isdn-home.cisco.com [10.49.137.202]) by cisco.com (8.8.8/2.6/Cisco List Logging/8.8.8) with ESMTP id SAA02832 for ; Tue, 26 Dec 2000 18:35:01 GMT Message-ID: <3A48E4C7.1BD37753@virgin.net> Date: Tue, 26 Dec 2000 18:34:48 +0000 From: "Stewart Bryant" X-Mailer: Mozilla 4.73 [en]C-CCK-MCD (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: Off topic - Soundblaster programming Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I know that it is off topic, and I apologies, but there is a good chance that the expertise will be on this list, and its always best to ask friends first. I am trying to measure the absolute value of an audio signal using the sound (microphone) input on my PC. (For a radio application, but not LF). Having beat my head against various brick walls until 2am the last few nights I now have a program that can get the samples from the sound card. After further beating of head, I discovered that the reason that I was not seeing the linear change with amplitude that I was expecting was because there is some sort of vogad action in the microphone audio input. Does anyone know: 1) How to turn this off 2) If the same applies to the line input If anyone has an example program for simple audio input via Vbasic that would be even better. There is a Vbasic code example that shows the use of the volume feature of the SB card to measure amplitude, but when I tried it (before I realised that vogad was going on) it seemed to have some strange semi log characteristic (ie it stayed constant and then suddenly increased as I varied the amplitude through the mixer control). Has anyone else had any experience making linear measurements through this feature? Thanks in advance to anyone that can help 73 Stewart G3YSX From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13845 invoked from network); 26 Dec 2000 17:34:53 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 26 Dec 2000 17:34:53 -0000 Received: (qmail 1108 invoked from network); 26 Dec 2000 17:38:03 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 26 Dec 2000 17:38:03 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AxtP-0000rD-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Dec 2000 17:28:07 +0000 Received: from ds-img-2.compuserve.com ([149.174.206.135] helo=spdmgaab.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AxtN-0000r5-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Dec 2000 17:28:06 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by spdmgaab.compuserve.com (8.9.3/8.9.3/SUN-1.9) id MAA05370 for rsgb_lf_group@blacksheep.org; Tue, 26 Dec 2000 12:27:28 -0500 (EST) Date: Tue, 26 Dec 2000 12:27:12 -0500 From: "'Geri' Kinzel, DK8KW" Subject: LF: Re: Re. VE1ZZ To: rsgb_lf_group@blacksheep.org Message-ID: <200012261227_MC2-BFB5-9363@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Mal, G3KEV wrote: >So you are saying that 1W >erp from a dummy load radiates just as efficiently as 1W from a 200 ft >vertical for instance.< ... no, surely not! But 1000 Watt from a - 30 dB 'gain' Antenna (that's approximately the 'gain' my 59 ft backyard antenna provides) will produce exactly the same ERP (definition see below) as 1 Watt radiated from a full-size vertical dipole (about 1100m high, which might be difficult to build for most amateurs due to most local communities authoritie's strange attitude ...). Please see below the relevant definitions as they are recommended by the ITU. Best 73, a peaceful time 'between the years' as we say in Germany ... Geri, DK8KW (W1KW) --------------------------------------------------------------------------- -------------------- "DEFINITIONS OF RADIATION IN LF, MF AND HF BROADCASTING BANDS (1978-1982-1986) Rec. 561-2 The CCIR UNANIMOUSLY RECOMMENDS that the following terminology should be used to define and determine the radiation from sound-broadcasting transmitters: 1. Cymomotive force (c.m.f.) (in a given direction) The product formed by multiplying the electric field strength at a given point in space, due to a transmitting station, by the distance of the point from the antenna. This distance must be sufficient for the reactive components of the field to be negligible; moreover, the finite conductivity of the ground is supposed to have no effect on propagation. The cymomotive force (c.m.f.) is a vector; when necessary it may be expressed in terms of components along axes perpendicular to the direction of propagation. The c.m.f. is expressed in volts; it corresponds numerically to the field strength in mV/m at a distance of 1 km. 2. Effective monopole-radiated power (e.m.r.p.) (in a given direction) The product of the power supplied to the antenna and its gain relative to a short vertical antenna in the given direction. (Radio Regulations, No. 157.) Radio Regulations No. 154 (c) defines the gain of an antenna in a given direction relative to a short vertical antenna G v as the gain relative to a loss-free reference antenna consisting of a linear conductor, much shorter than one quarter of a wavelength, normal to the surface of a perfectly conducting plane which contains the given direction. The reference antenna, when fed with a power of 1 kW, is considered to radiate an e.m.r.p. of 1 kW in any direction in the perfectly conducting plane and produces a field strength of 300 mV/m at 1 km distance (equivalent to a c.m.f. of 300 V). An e.m.r.p. of 1 kW is assumed in the derivation of the ground-wave propagation curves of Recommen-dation 368. An e.m.r.p. of 1 kW at all angles of elevation is assumed in the presentation of the sky-wave curves of Recommendation 435. Note 1  Definitions 1 and 2 are mainly used in LF and MF broadcasting. 3. Equivalent isotropically radiated power (e.i.r.p.) The product of the power supplied to the antenna and the antenna gain G i in a given direction relative to an isotropic antenna (absolute or isotropic gain) (Radio Regulations, No. 155). The idealized reference antenna, when fed with a power of 1 kW, is considered to provide an e.i.r.p. of 1 kW in all directions and to produce a field strength of 173 mV/m at 1 km distance. 4. Effective radiated power (e.r.p.) (in a given direction) The product of the power supplied to the antenna and its gain relative to a half-wave dipole in a given direction (Radio Regulations, No. 156). Radio Regulations No. 154 (b) defines the gain of an antenna in a given direction relative to a half-wave dipole G d , as the gain relative to a loss-free reference antenna isolated in space whose equatorial plane contains the given direction. The reference antenna, when fed with a power of 1 kW, is considered to radiate an e.r.p. of 1 kW in any direction in the equatorial plane and produces a field strength of 222 mV/m at 1 km distance." --------------------------------------------------------------------------- -------------------- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13245 invoked from network); 26 Dec 2000 17:17:49 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 26 Dec 2000 17:17:49 -0000 Received: (qmail 24214 invoked from network); 26 Dec 2000 17:12:40 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 26 Dec 2000 17:12:40 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AxSm-0000l6-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Dec 2000 17:00:36 +0000 Received: from cmailg4.svr.pol.co.uk ([195.92.195.174]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AxSl-0000kv-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Dec 2000 17:00:35 +0000 Received: from modem-159.antimony.dialup.pol.co.uk ([62.136.42.159] helo=default) by cmailg4.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14AxSd-0002yE-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Dec 2000 17:00:27 +0000 Message-ID: <000901c06f5c$9d18daa0$9f2a883e@default> From: "MAL HAMILTON" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Re. VE1ZZ Date: Tue, 26 Dec 2000 16:40:27 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: -----Original Message----- From: LAWRENCE MAYHEAD To: rsgb lf group Date: 25 December 2000 14:48 Subject: LF: Re. VE1ZZ >He is wrong! >Theory and experiment confirrm that 1W ERP is 1W ERP >irrespective of the sise /height of the ant. (or anything else for that >matter). You must know something about LF/MF antennas that the broadcast engineers do not know. Why do they always go for masts 200 ft - 100ft high. It would be much easier to generate more RF from the tx and use 10 ft masts to achieve the same erp out Why are some 73/136 operators using 40 - 60 ft masts when they could use a vertical a few feet high and according to you get the same results. G3KEV >Merry Xmas to all. Laurie. > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14741 invoked from network); 26 Dec 2000 17:10:24 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 26 Dec 2000 17:10:24 -0000 Received: (qmail 12835 invoked from network); 26 Dec 2000 17:12:54 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 26 Dec 2000 17:12:54 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AxSl-0000kz-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Dec 2000 17:00:35 +0000 Received: from cmailg4.svr.pol.co.uk ([195.92.195.174]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AxSk-0000kt-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Dec 2000 17:00:34 +0000 Received: from modem-159.antimony.dialup.pol.co.uk ([62.136.42.159] helo=default) by cmailg4.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14AxSb-0002yE-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Dec 2000 17:00:26 +0000 Message-ID: <000801c06f5c$9c370620$9f2a883e@default> From: "MAL HAMILTON" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Re. VE1ZZ Date: Tue, 26 Dec 2000 12:29:37 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: -----Original Message----- From: LAWRENCE MAYHEAD To: rsgb lf group Date: 25 December 2000 14:48 Subject: LF: Re. VE1ZZ >He is wrong! >Theory and experiment confirrm that 1W ERP is 1W ERP >irrespective of the sise /height of the ant. (or anything else for that >matter). There is a difference. The big antenna lauches the signal where it is meant to go whereas the small antenna just heats up the ground beneath it. A small antenna on LF is just a leaky dummy load. So you are saying that 1W erp from a dummy load radiates just as efficiently as 1W from a 200 ft vertical for instance. Dont forget to position your dummy load in a vertical plane!!!!!!!!!!!!!!!! >Merry Xmas to all. Laurie. > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23935 invoked from network); 26 Dec 2000 17:09:23 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 26 Dec 2000 17:09:23 -0000 Received: (qmail 12100 invoked from network); 26 Dec 2000 17:12:34 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 26 Dec 2000 17:12:34 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AxSo-0000lC-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Dec 2000 17:00:38 +0000 Received: from cmailg4.svr.pol.co.uk ([195.92.195.174]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AxSm-0000l5-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Dec 2000 17:00:36 +0000 Received: from modem-159.antimony.dialup.pol.co.uk ([62.136.42.159] helo=default) by cmailg4.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14AxSe-0002yE-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Dec 2000 17:00:29 +0000 Message-ID: <000a01c06f5c$9e149fc0$9f2a883e@default> From: "MAL HAMILTON" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Guard circuit - impressive performance Date: Tue, 26 Dec 2000 16:54:31 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: -----Original Message----- From: Andrew Talbot To: rsgb_lf_group@blacksheep.org Date: 25 December 2000 17:03 Subject: LF: Guard circuit - impressive performance >Well ............. >Just installed a version of the Decca guard circuit on the 600W PA, and its >performance is seriously impressive ! Still using the cheap and nasty >IRF840 FETs with just a minimum of turns adjustment for setting up, the PA >can be set to deliver 600 W, and no more. It is completely short circuit >proof and when the load resistance is progressively lowered, the output >current stays constant - power actually falling where before it would have >just kept going up until the devices popped. The Make-B4-Break switch for >the output transformer tap selection is how quite happy being hot switched. > >Only one spare IRF840 left now, out of an original total of 24 so can't blow >up any more by routine testing. I reckon this PA is now finished - looks >like there is no need for current monitoring circuits so its time to think >about the BIG one - four FETs in bridge. Go for it Andy. As far as I can remember the commercial Loudenboomer RF amp had no mains transformer, just rectified/smoothed mains, and 4 x tv line output tubes. It produced around 500w out and was very small and light. Not sure of the tube configuration. The man I know is getting mains sag with his 4 x fets in a bridge, but I think he is pushing it too hard. Are you using a series resonant cct then 50 ohm matching at the o/put similar to the decca ? The decca guard/protection cct is good, surprised no one thought of it before. > >Getting this rather strange circuit concept going was far more satisfying >than this Xmas thing, congratulations (pass please on Walter) to the person >who first thought up the idea. > >Now to forget RF design and watch Titanic ! > >73 >Andy G4JNT > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7 invoked from network); 26 Dec 2000 07:40:51 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 26 Dec 2000 07:40:51 -0000 Received: (qmail 21036 invoked from network); 26 Dec 2000 07:44:02 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 26 Dec 2000 07:44:02 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Aoc3-0007Rl-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Dec 2000 07:33:35 +0000 Received: from smtp2.vol.cz ([195.250.128.42]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Aoc2-0007Rg-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Dec 2000 07:33:34 +0000 Received: from OK1FIG (hradeca-17.dialup.vol.cz [212.27.208.17]) by smtp2.vol.cz (8.11.1/8.11.1) with SMTP id eBQ7XJh49927 for ; Tue, 26 Dec 2000 08:33:19 +0100 (CET) Message-ID: <000d01c06f0d$7bc770e0$11d01bd4@OK1FIG> From: "Petr Maly" To: "RSGB LF GROUP" Subject: LF: EasyGram 1.21 Date: Tue, 26 Dec 2000 07:23:03 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2014.211 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all I found a bug in version 1.20, it doesn't switch off PC under some circumstancies when saving period is longer than 1 minute. You can download a fixed version 1.21 now. What a shame. I work as a professional bug finder and quality control in a software firm! 73 and merry xmas Petr OK1FIG From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28777 invoked from network); 26 Dec 2000 00:18:15 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 26 Dec 2000 00:18:15 -0000 Received: (qmail 8635 invoked from network); 26 Dec 2000 00:20:45 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 26 Dec 2000 00:20:45 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AheI-0005ue-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Dec 2000 00:07:26 +0000 Received: from cmailg7.svr.pol.co.uk ([195.92.195.177]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AheH-0005uZ-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Dec 2000 00:07:25 +0000 Received: from modem-87.aegnor.dialup.pol.co.uk ([62.136.97.215] helo=lvm) by cmailg7.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14Ahe9-0007bA-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Dec 2000 00:07:17 +0000 Message-ID: <000201c06ed0$4756d5e0$d761883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. VE1ZZ Date: Tue, 26 Dec 2000 00:10:37 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Jacks signals strength O, again here tonight 0000 UTC. Laurie. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29547 invoked from network); 25 Dec 2000 21:01:47 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 25 Dec 2000 21:01:47 -0000 Received: (qmail 21987 invoked from network); 25 Dec 2000 21:04:18 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 25 Dec 2000 21:04:18 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Aed1-0005AI-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Dec 2000 20:53:55 +0000 Received: from fep01.swip.net ([130.244.199.129] helo=fep01-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Aed0-0005AD-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Dec 2000 20:53:54 +0000 Received: from W98 ([212.151.40.168]) by fep01-svc.swip.net (InterMail vM.5.01.01.01 201-252-104) with SMTP id <20001225205346.ICKH19675.fep01-svc.swip.net@W98> for ; Mon, 25 Dec 2000 21:53:46 +0100 Message-ID: <000b01c06eb4$9e8ec820$a82897d4@W98.swipnet.se> From: "Christer Andersson" To: "RSGB LF Group" Subject: LF: Saturday night unid Date: Mon, 25 Dec 2000 21:52:38 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: On Saturday evening (I don't remember the exact time) I received a transmission centered on 136.152 with approx. 30 Hz BW. Who was it? http://home5.swipnet.se/~w-54761/unid1.gif With the image rotated 90 degrees and with some imagination: http://home5.swipnet.se/~w-54761/unid2.gif Various patterns were transmitted repeatedly. Some text message i assume. /sm6pxj From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16578 invoked from network); 25 Dec 2000 18:02:26 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 25 Dec 2000 18:02:26 -0000 Received: (qmail 26133 invoked from network); 25 Dec 2000 18:04:57 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 25 Dec 2000 18:04:57 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Abt5-0004ZB-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Dec 2000 17:58:19 +0000 Received: from hs-img-5.compuserve.com ([149.174.177.154] helo=sphmgaae.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Abt4-0004Z6-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Dec 2000 17:58:18 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by sphmgaae.compuserve.com (8.9.3/8.9.3/SUN-1.9) id MAA13985 for rsgb_lf_group@blacksheep.org; Mon, 25 Dec 2000 12:58:10 -0500 (EST) Date: Mon, 25 Dec 2000 12:57:12 -0500 From: "'Geri' Kinzel, DK8KW" Subject: LF: New EasyGram: mni tnx! To: rsgb_lf_group@blacksheep.org Message-ID: <200012251257_MC2-BFCC-857E@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Petr, immediately download the new Easygram and found it working very well! Thanks for your support of the LF community, currently EasyGram (with the R.S. Horne Spectrogram-DLL) is my favorite proram not only for Slow-CW but for constantly monitoring the range between 136.000 and 137.000 kHz watching out for signals ... Best 73 and Merry Christmas! Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23303 invoked from network); 25 Dec 2000 16:58:27 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 25 Dec 2000 16:58:27 -0000 Received: (qmail 7629 invoked from network); 25 Dec 2000 17:01:38 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 25 Dec 2000 17:01:38 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Aatw-0004LM-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Dec 2000 16:55:08 +0000 Received: from smtp-1.visp.telinco.net ([212.1.130.1]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Aatu-0004LH-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Dec 2000 16:55:07 +0000 Received: from [212.1.156.159] (helo=g4jnt) by smtp-1.visp.telinco.net with smtp (Exim 3.16 #1) id 14AanW-00038t-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Dec 2000 16:48:30 +0000 Message-ID: <001701c06e93$258e3b20$9f9c01d4@g4jnt> From: "Andrew Talbot" To: rsgb_lf_group@blacksheep.org Subject: LF: Guard circuit - impressive performance Date: Mon, 25 Dec 2000 16:52:57 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.1 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Well ............. Just installed a version of the Decca guard circuit on the 600W PA, and its performance is seriously impressive ! Still using the cheap and nasty IRF840 FETs with just a minimum of turns adjustment for setting up, the PA can be set to deliver 600 W, and no more. It is completely short circuit proof and when the load resistance is progressively lowered, the output current stays constant - power actually falling where before it would have just kept going up until the devices popped. The Make-B4-Break switch for the output transformer tap selection is how quite happy being hot switched. Only one spare IRF840 left now, out of an original total of 24 so can't blow up any more by routine testing. I reckon this PA is now finished - looks like there is no need for current monitoring circuits so its time to think about the BIG one - four FETs in bridge. Getting this rather strange circuit concept going was far more satisfying than this Xmas thing, congratulations (pass please on Walter) to the person who first thought up the idea. Now to forget RF design and watch Titanic ! 73 Andy G4JNT From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7126 invoked from network); 25 Dec 2000 16:18:12 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 25 Dec 2000 16:18:12 -0000 Received: (qmail 22590 invoked from network); 25 Dec 2000 16:13:04 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 25 Dec 2000 16:13:04 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Aa7E-0004C4-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Dec 2000 16:04:48 +0000 Received: from smtp2.volny.cz ([212.20.96.11]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Aa7D-0004Bz-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Dec 2000 16:04:47 +0000 Received: from OK1FIG (hradeca-114.dialup.vol.cz [212.27.208.114]) by smtp2.volny.cz (8.9.3/8.9.3) with SMTP id RAA78353 for ; Mon, 25 Dec 2000 17:04:38 +0100 (CET) Message-ID: <000f01c06e8b$c1529c20$72d01bd4@OK1FIG> From: "Petr Maly" To: "RSGB LF GROUP" Subject: LF: New EasyGram Date: Mon, 25 Dec 2000 15:45:45 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2014.211 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all I just uploaded a new version of EasyGram (1.20). What's new: 1. it enables to either terminate EasyGram or shut down the computer after last screen shot is made (convenient for Eu stations for transatlantic tests) 2. new buttons on Images page: "Save as" and "Rename" (screen shot) 3. GUI was reorganized so that the controlling window is even smaller and "remembers" it's position after program is terminated 73, Petr OK1FIG http://www.mujweb.cz/www/OK1FIG/136k.htm From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12808 invoked from network); 25 Dec 2000 14:52:12 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 25 Dec 2000 14:52:12 -0000 Received: (qmail 17164 invoked from network); 25 Dec 2000 14:47:05 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 25 Dec 2000 14:47:05 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AYop-0003tV-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Dec 2000 14:41:43 +0000 Received: from mail3.svr.pol.co.uk ([195.92.193.19]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AYoo-0003tQ-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Dec 2000 14:41:42 +0000 Received: from modem-96.alcarondas.dialup.pol.co.uk ([62.136.101.96] helo=lvm) by mail3.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14AYog-0005Xx-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Dec 2000 14:41:35 +0000 Message-ID: <000101c06e81$41211ea0$6065883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. VE1ZZ Date: Mon, 25 Dec 2000 14:44:56 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: He is wrong! Theory and experiment confirrm that 1W ERP is 1W ERP irrespective of the sise /height of the ant. (or anything else for that matter). Merry Xmas to all. Laurie. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2916 invoked from network); 25 Dec 2000 12:47:27 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 25 Dec 2000 12:47:27 -0000 Received: (qmail 19745 invoked from network); 25 Dec 2000 12:50:37 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 25 Dec 2000 12:50:37 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AX0S-0003W5-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Dec 2000 12:45:36 +0000 Received: from bucky-rwcmex.excite.com ([198.3.99.218] helo=bucky.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AX0R-0003W0-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Dec 2000 12:45:35 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by bucky.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001225124457.QDPN25756.bucky.excite.com@almond.excite.com> for ; Mon, 25 Dec 2000 04:44:57 -0800 Message-ID: <30046011.977748297481.JavaMail.imail@almond.excite.com> Date: Mon, 25 Dec 2000 04:44:56 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: ve1zz MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 62.253.64.5 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Go for it guys, prove him wrong,hi!! John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 560 invoked from network); 25 Dec 2000 12:47:16 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 25 Dec 2000 12:47:16 -0000 Received: (qmail 16820 invoked from network); 25 Dec 2000 12:49:45 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 25 Dec 2000 12:49:45 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AWyd-0003Vy-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Dec 2000 12:43:43 +0000 Received: from gigi.excite.com ([199.172.152.110]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AWyc-0003Vs-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Dec 2000 12:43:42 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by gigi.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001225124307.DUDN9407.gigi.excite.com@almond.excite.com> for ; Mon, 25 Dec 2000 04:43:07 -0800 Message-ID: <25899600.977748187448.JavaMail.imail@almond.excite.com> Date: Mon, 25 Dec 2000 04:43:04 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: MM0ALM Slow Morse MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 62.253.64.5 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi All, Saw Dave, MM0ALM sending Slow Morse at 6 wpm on 136.00 kHz at 12.30 today. Presumably as a test for Trans-atlantic. You will find the Spectrogram image on my web page: www.g4cnn.f2s.com Hope everyone is enjoying Christmas. 73 John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5203 invoked from network); 25 Dec 2000 10:38:20 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 25 Dec 2000 10:38:20 -0000 Received: (qmail 28412 invoked from network); 25 Dec 2000 10:41:30 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 25 Dec 2000 10:41:30 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AUxm-00034p-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Dec 2000 10:34:42 +0000 Received: from hs-img-2.compuserve.com ([149.174.177.151] helo=sphmgaab.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AUxk-00034k-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Dec 2000 10:34:41 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by sphmgaab.compuserve.com (8.9.3/8.9.3/SUN-1.9) id FAA03860 for rsgb_lf_group@blacksheep.org; Mon, 25 Dec 2000 05:34:03 -0500 (EST) Date: Mon, 25 Dec 2000 05:33:31 -0500 From: "'Geri' Kinzel, DK8KW" Subject: LF: ve1zz, g3kev To: rsgb_lf_group@blacksheep.org Message-ID: <200012250533_MC2-BFAA-326B@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Mal, G3KEV wrote: >Except you are extremely lucky the chance of being heard in VE/W with the >average 40 ft vertical or low long wire is nil.< ... and it is exactly that little chance that fascinates me (and possibly other's trying to do the same) and it's that challenge that I am working on (well, ok, my umbrella is not 40 ft high but 59 ft, so may it be already considered a medium sized small-vertical antenna...?). For a 100%-chance QSO I either use an appropriate shortwave band or the Internet! Best 73 es Merry Christmas! Geri, DK8KW (W1KW) P.S.: I am the type of guy that takes a 1 Watt 14 MHz Mizuho CW-TX with a 2 x 5m dipole to Perth/Australia and hopes for a QSO with my father, DL6PE, back home ... and it *worked*! From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29024 invoked from network); 25 Dec 2000 10:37:01 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 25 Dec 2000 10:37:01 -0000 Received: (qmail 22806 invoked from network); 25 Dec 2000 10:31:53 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 25 Dec 2000 10:31:53 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AUon-00033X-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Dec 2000 10:25:25 +0000 Received: from cmailg7.svr.pol.co.uk ([195.92.195.177]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AUom-00033S-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Dec 2000 10:25:25 +0000 Received: from modem-49.baranduin.dialup.pol.co.uk ([62.136.135.49] helo=lvm) by cmailg7.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14AUod-0004yN-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Dec 2000 10:25:16 +0000 Message-ID: <000101c06e5d$72403bc0$3187883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. VE1ZZ Date: Mon, 25 Dec 2000 10:27:47 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Valerio, No copy here last night either! also high static level.Dont despair! Have a happy Christmas. Laurie. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18430 invoked from network); 25 Dec 2000 10:13:01 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 25 Dec 2000 10:13:01 -0000 Received: (qmail 12118 invoked from network); 25 Dec 2000 10:16:11 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 25 Dec 2000 10:16:11 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AUZB-0002yC-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Dec 2000 10:09:17 +0000 Received: from mail4.svr.pol.co.uk ([195.92.193.211]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AUZA-0002y7-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Dec 2000 10:09:16 +0000 Received: from modem-45.scandium.dialup.pol.co.uk ([62.136.20.45] helo=default) by mail4.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14AUZ2-00014k-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Dec 2000 10:09:09 +0000 Message-ID: <000101c06e59$fe305920$2d14883e@default> From: "MAL HAMILTON" To: "rsgb" Subject: LF: ve1zz Date: Mon, 25 Dec 2000 10:03:17 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Merry Christmas to all experimenters on LF. Unfortunately I am otherwise engaged at present and cannot participate with the VE1ZZ experiments, but now that he is being heard in EU by several amateurs a two way qso on 136 must be imminent. He has the advantage with a large antenna and good erp. In EU with a good high vertical antenna launching the 1W erp and preferably a good rural QTH or even better a QTH in Ireland, it is possible. Except you are extremely lucky the chance of being heard in VE/W with the average 40 ft vertical or low long wire is nil. These antennas are fine for a few hundred miles around europe but for long haul the big antenna is the secret. 73 de Mal/G3KEV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9376 invoked from network); 25 Dec 2000 09:14:51 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 25 Dec 2000 09:14:51 -0000 Received: (qmail 6420 invoked from network); 25 Dec 2000 09:18:01 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 25 Dec 2000 09:18:01 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14ATbR-0002lQ-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Dec 2000 09:07:33 +0000 Received: from [212.239.30.36] (helo=mail.jumpy.it) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14ATbQ-0002lL-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Dec 2000 09:07:32 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from mailsrv.dii.unisi.it (213.213.29.120) by mail.jumpy.it (5.1.050) id 3A3F806A0002BEBD for rsgb_lf_group@blacksheep.org; Mon, 25 Dec 2000 10:07:20 +0100 Message-ID: <3A470E03.E20E5BA3@mailsrv.dii.unisi.it> Date: Mon, 25 Dec 2000 10:06:12 +0100 From: "valerio" X-Mailer: Mozilla 4.73 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: "Rsgb_Lf_Group" Subject: LF: VE1ZZ Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Despite the time spent to try last nights, here in Italy copied nothing from VE1ZZ. Noise band is quite high in this period, much similar to summer then winter, I celebrate Christmas with lightnings and thunders. Normal CW QSO is a little bit more far for me. Happy Christmas and new year 2001 to all Valerio IK5ZPV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22580 invoked from network); 25 Dec 2000 09:03:24 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 25 Dec 2000 09:03:24 -0000 Received: (qmail 28732 invoked from network); 25 Dec 2000 09:05:55 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 25 Dec 2000 09:05:55 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14ATQL-0002jY-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Dec 2000 08:56:05 +0000 Received: from mta05-svc.ntlworld.com ([62.253.162.45]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14ATQK-0002jT-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Dec 2000 08:56:04 +0000 Received: from oemcomputer ([213.104.101.100]) by mta05-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001225085556.RNIW18404.mta05-svc.ntlworld.com@oemcomputer> for ; Mon, 25 Dec 2000 08:55:56 +0000 Message-ID: <001601c06e50$69508ea0$646568d5@oemcomputer> From: "mike.dennison" To: rsgb_lf_group@blacksheep.org References: <200012241343_MC2-BFB3-33DC@compuserve.com> Subject: Re: LF: QRSS is a full success in USA Date: Mon, 25 Dec 2000 08:52:36 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Mike. G3XDV wrote >with existing freeware and internal hardware. There is only a tiny number of >well-equipped Eu stations who have BPSK going efficiently.< ... correct, Mike ... but I still remember 1997/98, when only a few stations were equipped with either FFT-DSP or DSP programs that required special hardware. The QRSS-"boom" came later, when solutions like Spectrogram and QRSS became available and more stations realized how easy it was to get QRV in QRSS. So let us see ... if I interpret Lyle's tests correctly, there is still an improvements of about 6 dB to expect if we switch to a slow synchronized mode ... maybe exactly the 6 dB some of us need to cross the Atlantic (still I only got about 200 mW ERP, my trial of increasing my output power of thr G0MRF PA lasted about 10 seconds .. before my FETs exploded ...). Geri, DK8KW (W1KW) --------- Yes, what I was really trying to say was that it was not a change from QRSS to BPSK in Europe. It was more that stations were becoming equipped with both modes, though rather slowly. Just sitting here on Christmas Day waiting for lazy Number 1 son to get out of bed so we can open the family's presents! I will be in GW between Christmas and New Year, but only active on receive. Back on the air from Jan 2. 73 and a happy New Year de Mike, G3XDV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10098 invoked from network); 25 Dec 2000 08:27:26 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 25 Dec 2000 08:27:26 -0000 Received: (qmail 797 invoked from network); 25 Dec 2000 08:30:36 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 25 Dec 2000 08:30:36 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14ASpV-0002bi-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Dec 2000 08:18:01 +0000 Received: from kauha.saunalahti.fi ([195.197.53.227]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14ASpU-0002bd-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Dec 2000 08:18:00 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from default (CXVI.pdyn.saunalahti.fi [195.197.15.116]) by kauha.saunalahti.fi (8.10.1/8.10.1) with SMTP id eBP8I3n21326 for ; Mon, 25 Dec 2000 10:18:03 +0200 (EET) Message-ID: <3.0.6.32.20001225101825.00885ce0@pop.saunalahti.fi> X-Sender: vaiski1@pop.saunalahti.fi (Unverified) X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.6 (32) Date: Mon, 25 Dec 2000 10:18:25 +0200 To: rsgb_lf_group@blacksheep.org From: =?iso-8859-1?Q?V=E4in=F6_Lehtoranta?= Subject: LF: Fs Measurements by OH2LX, 25-Dec-2000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Fs in dB(uV/m) by OH2LX, abt 2040z (99=Nil): >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> kHz;11dec;12dec;13dec;14dec;15dec;16dec;17dec;18dec;19dec;20dec;21dec;22dec; 23dec;24dec 057.7;99;99;99;99;99;99;99;99;99;99;99;99;99;99 060.0;52;44;49;49;50;49;50;50;53;52;52;53;54;56 068.0;48;48;52;50;50;51;54;54;55;53;54;52;52;51 068.9;99;99;99;99;99;99;99;99;99;57;56;54;54;57 073.2;46;37;45;39;42;40;43;45;46;43;44;43;46;47 075.0;44;40;41;37;41;35;42;42;42;43;40;47;42;46 077.5;54;50;53;50;54;51;54;52;57;57;53;60;55;59 128.9;46;38;45;40;45;43;42;46;47;46;41;53;45;49 138.8;52;41;48;47;48;41;46;41;44;44;32;52;50;52 135.8;99;99;99;99;28;15;18;15;99;16;28;27;27;20 137.0;99;99;99;99;99;99;99;99;05;99;99;99;99;99 016.0;50;46;48;48;48;49;50;50;52;52;53;55;54;55 018.3;99;52;99;52;53;54;56;51;55;58;99;60;59;60 023.4;64;62;63;62;63;64;64;64;64;62;63;67;99;99 024.0;99;47;45;45;46;46;49;99;52;50;49;51;50;52 ;;Day;11;12;13;14;15;16;17;18;19;20;21;22;23;24 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Day;Time;Call;Fs 11dec;2033;SM6PXJ;11 11dec;2047;G3OLB;-6 11dec;2024;OH1TN;12 16dec;1956;OH1TN;14 16dec;2209;DJ8WS;-6 16dec;2209;MM0ALM;10 16dec;2213;MM0ALM;10 16dec;2212;OH1BS;15 16dec;2214;OH1BS;16 19dec;2016;OH1TN;23 19dec;2021;OH1TN;22 20dec;2055;OH1BS;14 20dec;2150;OH1BS;18 20dec;2136;G3LDO;-3 20dec;2152;G3LDO;-4 20dec;2157;G0AQC;-4 20dec;2208;G3LDO;-4 20dec;2213;G3LDO;-3 20dec;2211;PA0BWL;-6 20dec;2218;PA0BWL;-7 21dec;2017;ON6ND;-1 21dec;2021;ON6ND;-1 22dec;2025;DF0WD;-2 22dec;2103;DK8KW;-1 22dec;2103;ON6ND;-0 22dec;2113;ON6ND;+1 22dec;2104;DJ8WX;+1 22dec;2109;DJ8WX;-0 22dec;2131;DK8KW;-1 22dec;2241;G3XTZ;-2 22dec;2227;SM6PXJ;10 22dec;2325;SM6PXJ;10 22dec;2229;OH1TN;19 22dec;2239;OH1TN;19 22dec;2328;DJ8WX;-0 23dec;2002;MM0ALM;+8 23dec;2004;MM0ALM;+9 23dec;2054;MM0ALM;+2 23dec;2235;MM0ALM;+8 23dec;2243;MM0ALM;10 23dec;2001;PA0BWL;-5 23dec;2005;PA0BWL;-6 23dec;2159;PA0BWL;-5 23dec;2159;DJ8WX;-0 23dec;2203;OH1TN;19 23dec;2215;OH1TN;20 23dec;2207;OH1BS;19 23dec;2227;DF0WD;-2 24dec;2231;MM0ALM;16 24dec;2234;MM0ALM;16 24dec;2237;MM0ALM;15 25dec;0347;MM0ALM;17 25dec;0423;MM0ALM;15 25dec;0440;MM0ALM;17 ------------------------------------------------------- (R&S ESH2/-----10m coax----->/1:10/-----15m wire-----): Noise level (136.2-136.9) with antenna, in 200Hz IF Bw: -26..-24 dB(uV)-> estim. Field strength -6..-4 dB(uV/m) ------------------------------------------------------- End of message of 25-Dec-2000, 0820 UTC, from OH2LX ------------------------------------------------------- |---------------------------------------------------------| | V.K.Lehtoranta, OH2LX ¤ 60N33.6 024E58.7 KP20LN74 | | P.O.Box 50 ¤ Telephone: +358-9-4173965 | | FIN-05401, Jokela ¤ Telefax: +358-9-4173961 | | Finland ¤ email: vaiski@dlc.fi | |---------------------------------------------------------| From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22512 invoked from network); 24 Dec 2000 23:53:11 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 24 Dec 2000 23:53:11 -0000 Received: (qmail 20409 invoked from network); 24 Dec 2000 23:55:39 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 24 Dec 2000 23:55:39 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AKuF-0000kD-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Dec 2000 23:50:23 +0000 Received: from hs-img-1.compuserve.com ([149.174.177.150] helo=sphmgaaa.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AKuE-0000k8-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 23:50:22 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by sphmgaaa.compuserve.com (8.9.3/8.9.3/SUN-1.9) id SAA18965 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 18:50:11 -0500 (EST) Date: Sun, 24 Dec 2000 18:49:45 -0500 From: "'Geri' Kinzel, DK8KW" Subject: LF: RX and operating techniques To: rsgb_lf_group@blacksheep.org Message-ID: <200012241850_MC2-BFC8-1399@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Martin, M5CIX, wrote: >There must be a book to be written on LF operating including a >glossery of terms (O, M etc).< Martin, the book actually *was* written ... by Peter, G3LDO (see http://www.rsgb.org/books/acatalog/RSGB_On_Line_Shop_What_s_New_26.html): "The Low Frequency Experimenter's Handbook NEW !! by Peter Dodd, G3LDO The LF Experimenter's Handbook has been written to meet the needs of amateurs and experimenters who have an interest in low power radio techniques below 200kHz. Most of the techniques described are targeted at those using the 136kHz band, but they are also of great interest to readers in New Zealand and Australia with the 183kHz band and the Lowfers in the USA on 180kHz. The bulk of the material in the book comprises contributions from experimenters world wide and covers antennas, propagation, transmitters, special modes and test equipment, and discusses some applications such as communication with caving enthusiasts. All those interested in exploring the new frontier of the LF bands will welcome this invaluable and unique reference, whether they tend to transmitting or are content just to receive. 2000, RSGB,paperback 296 by 210 mm, 146 pages. ISBN 1-872309-65-8" This information comes a little bit late for a christmas gift .... but anyhow: Merry Christmas, vy73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23468 invoked from network); 24 Dec 2000 23:27:15 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 24 Dec 2000 23:27:15 -0000 Received: (qmail 1839 invoked from network); 24 Dec 2000 23:22:08 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 24 Dec 2000 23:22:08 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AKNf-0000cq-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Dec 2000 23:16:43 +0000 Received: from anchor-post-33.mail.demon.net ([194.217.242.91]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AKNe-0000cl-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 23:16:42 +0000 Received: from rgcomms.demon.co.uk ([193.237.77.63] helo=G) by anchor-post-33.mail.demon.net with smtp (Exim 2.12 #1) id 14AKNX-000AJl-0X for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 23:16:35 +0000 From: "Graham Phillips" To: "Rsgb_Lf_Group" Subject: LF: Happy Xmas. Date: Sun, 24 Dec 2000 23:15:18 -0000 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Importance: Normal Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all L.F.ers. I am now going cross-eyed from P.C. screen observation !!! Best Wishes for the Holiday and for 2001. 73 de Graham B. Phillips. G3XTZ. g3xtz@rgcomms.demon.co.uk From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6654 invoked from network); 24 Dec 2000 20:49:41 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 24 Dec 2000 20:49:41 -0000 Received: (qmail 25636 invoked from network); 24 Dec 2000 20:52:50 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 24 Dec 2000 20:52:50 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AI28-00002Y-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Dec 2000 20:46:20 +0000 Received: from fortune-rwcmta.excite.com ([198.3.99.203] helo=fortune.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AI27-00002T-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 20:46:20 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by fortune.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001224204541.ZPWD9490.fortune.excite.com@almond.excite.com> for ; Sun, 24 Dec 2000 12:45:41 -0800 Message-ID: <15539712.977690741546.JavaMail.imail@almond.excite.com> Date: Sun, 24 Dec 2000 12:45:38 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: VE1ZZ / Spectrogram MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 62.253.64.5 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Mike, It depends. I normally use the 30dB setting, and this is fine for good S/N, but for very weak signals, one needs to keep the noise in the picture in order not to lose the signal you are looking for. I think the result I got with Spectrogram speaks for itself. John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7228 invoked from network); 24 Dec 2000 20:13:01 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 24 Dec 2000 20:13:01 -0000 Received: (qmail 6538 invoked from network); 24 Dec 2000 20:16:09 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 24 Dec 2000 20:16:09 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AHRP-0008Nr-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Dec 2000 20:08:23 +0000 Received: from smtp04.wxs.nl ([195.121.6.59]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AHRM-0008Nm-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 20:08:20 +0000 Received: from default ([195.121.220.28]) by smtp04.wxs.nl (Netscape Messaging Server 4.15) with SMTP id G6399F01.Z24 for ; Sun, 24 Dec 2000 21:08:04 +0100 Message-ID: <002a01c06de5$1b263100$1cdc79c3@default> From: "ko versteeg" To: rsgb_lf_group@blacksheep.org Subject: LF: HB2ASB Date: Sun, 24 Dec 2000 21:07:11 +0100 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="------------040607040606090807040704" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.1 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: This is a multi-part message in MIME format. --------------040607040606090807040704 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit Group. Despite the noise from the snow and wind i managed to receive: HB2ASB on QRSS and Only visible G3XDV on QRSS 559 DJ5DI 589 cw DK8KW 599 cw PA0BWL 599+10dB cw ON6ND 599+5dB cw Merry Christmas everyone. 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for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Dec 2000 19:02:22 +0000 Received: from email.cwcom.net ([195.44.0.153] helo=cwcom.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AGPV-00086s-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 19:02:21 +0000 Received: from computer ([195.44.209.246]) by cwcom.net with Microsoft SMTPSVC(5.5.1877.537.53); Sun, 24 Dec 2000 19:02:13 +0000 Message-ID: <000901c06ddc$306daa60$f6d12cc3@computer> From: "Martin M5CIX" To: rsgb_lf_group@blacksheep.org References: <20001224.121800.-1123.3.riese-k3djc@juno.com> <000401c06dd6$25ae9040$b76468d5@oemcomputer> Subject: LF: RX and operating techniques Date: Sun, 24 Dec 2000 19:03:19 -0000 Organization: M5CIX / G8CIX MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: RX techniques Having now established a recive set-up I would be greatfull if anyone is prepared to share there RX technics. Reciver modes and filtering along with how you calibrate the RX frequence on Spectran and any other operating techniques. There must be a book to be written on LF operating including a glossery of terms (O, M etc). Martin M5CIX From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13874 invoked from network); 24 Dec 2000 18:48:52 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 24 Dec 2000 18:48:52 -0000 Received: (qmail 25052 invoked from network); 24 Dec 2000 18:51:22 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 24 Dec 2000 18:51:22 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AG9e-00081b-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Dec 2000 18:45:58 +0000 Received: from hs-img-6.compuserve.com ([149.174.177.155] helo=sphmgaaf.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AG9d-00081W-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 18:45:57 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by sphmgaaf.compuserve.com (8.9.3/8.9.3/SUN-1.9) id NAA03863 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 13:45:49 -0500 (EST) Date: Sun, 24 Dec 2000 13:43:36 -0500 From: "'Geri' Kinzel, DK8KW" Subject: Re: LF: QRSS is a full success in USA To: rsgb_lf_group@blacksheep.org Message-ID: <200012241343_MC2-BFB3-33DC@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Mike. G3XDV wrote >with existing freeware and internal hardware. There is only a tiny number of >well-equipped Eu stations who have BPSK going efficiently.< ... correct, Mike ... but I still remember 1997/98, when only a few stations were equipped with either FFT-DSP or DSP programs that required special hardware. The QRSS-"boom" came later, when solutions like Spectrogram and QRSS became available and more stations realized how easy it was to get QRV in QRSS. So let us see ... if I interpret Lyle's tests correctly, there is still an improvements of about 6 dB to expect if we switch to a slow synchronized mode ... maybe exactly the 6 dB some of us need to cross the Atlantic (still I only got about 200 mW ERP, my trial of increasing my output power of thr G0MRF PA lasted about 10 seconds .. before my FETs exploded ...). Best 73 and a peaceful Christmas! Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4927 invoked from network); 24 Dec 2000 18:23:17 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 24 Dec 2000 18:23:17 -0000 Received: (qmail 9945 invoked from network); 24 Dec 2000 18:26:28 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 24 Dec 2000 18:26:28 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AFlT-0007v0-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Dec 2000 18:20:59 +0000 Received: from mta02-svc.ntlworld.com ([62.253.162.42]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AFlR-0007uv-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 18:20:58 +0000 Received: from oemcomputer ([213.104.100.183]) by mta02-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001224182049.SUTQ23225.mta02-svc.ntlworld.com@oemcomputer> for ; Sun, 24 Dec 2000 18:20:49 +0000 Message-ID: <000401c06dd6$25ae9040$b76468d5@oemcomputer> From: "mike.dennison" To: rsgb_lf_group@blacksheep.org References: <20001224.121800.-1123.3.riese-k3djc@juno.com> Subject: Re: LF: QRSS is a full success in USA Date: Sun, 24 Dec 2000 18:19:59 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > this is a bit amusing. In the US the trend is to go for QRSS from BPSK > and in Europe from QRSS to BPSK. A kinda flip flop. > Bob K3DJC Not strictly correct. Almost all of those who are getting equipped for BPSK can already do QRSS. The whole point being that it is so simple to implement with existing freeware and internal hardware. There is only a tiny number of well-equipped Eu stations who have BPSK going efficiently. Merry Christmas de Mike, G3XDV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5824 invoked from network); 24 Dec 2000 17:30:32 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 24 Dec 2000 17:30:32 -0000 Received: (qmail 8816 invoked from network); 24 Dec 2000 17:33:01 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 24 Dec 2000 17:33:01 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AEr2-0007gc-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Dec 2000 17:22:40 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from m11.boston.juno.com ([63.211.172.74]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AEqy-0007gX-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 17:22:37 +0000 Received: from cookie.juno.com by cookie.juno.com for <"yokUgcxCbtTP7XLrpefewNGkU4JxYZtLuprzD48M4mlizZJ40n9CbQ=="> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from riese-k3djc@juno.com) by m11.boston.juno.com (queuemail) id FR3RXQ4C; Sun, 24 Dec 2000 12:21:51 EST To: rsgb_lf_group@blacksheep.org Date: Sun, 24 Dec 2000 12:17:22 -0500 Subject: Re: LF: QRSS is a full success in USA Message-ID: <20001224.121800.-1123.3.riese-k3djc@juno.com> X-Mailer: Juno 2.0.11 X-Juno-Line-Breaks: 0-4,6-14 X-Juno-Att: 0 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit From: "Bob RIESE" Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Yes Geri this is a bit amusing. In the US the trend is to go for QRSS from BPSK and in Europe from QRSS to BPSK. A kinda flip flop. The bottom line is that the LOFER stations that now are QRSS are receiving many DX reception reports. Looks like the ease in receiving with the FFT programs and availably of same is making a difference. More folks looking , more good results, Looking forward to the reports of the first 2 Way on 136 Merry Xtmas to all Bob K3DJC From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13941 invoked from network); 24 Dec 2000 13:11:42 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 24 Dec 2000 13:11:42 -0000 Received: (qmail 9257 invoked from network); 24 Dec 2000 13:14:51 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 24 Dec 2000 13:14:51 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AAry-0006eF-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Dec 2000 13:07:22 +0000 Received: from ds-img-1.compuserve.com ([149.174.206.134] helo=spdmgaaa.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AArx-0006eA-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 13:07:21 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by spdmgaaa.compuserve.com (8.9.3/8.9.3/SUN-1.9) id IAA29777 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 08:06:44 -0500 (EST) Date: Sun, 24 Dec 2000 08:06:21 -0500 From: "'Geri' Kinzel, DK8KW" Subject: LF: Slow Voice experiments To: rsgb_lf_group@blacksheep.org Message-ID: <200012240806_MC2-BFAB-35A7@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Lionel, G3PPT wrote: > As far as slow audio goes, I wonder if it would be possible to record 2 kHz > bandwidth speech into a .WAV file at 44100Hz and then alter the sampling > frequency in the file header to 11025Hz. Playing this would result in the > speech with a duration four times as long but in one quarter the bandwidth. > The frequency band would span 1 to 500Hz, so this would need to be > transposed up to 300-800Hz in order to go through an SSB filter. Reception > could be by similar techniques to those used in QRSS.EXE referred to above > but with a further transposition to restore the original pitch. With the > SB16 card, it would be possible to play a .WAV file at 5513Hz though a 250Hz > bandwidth but not all soundcards allow the choice of non standard > frequencies Lionel, Cool Edit 2000 (http://www.syntrillium.com/) has a transpose feature, in which you can transform the speed and make a recorded message four times longer, reducing the bandwidth. You can do the opposite, too. I tried to push a 100 to 900 Hz (so within the DL 800 Hz bandwidt limitation) message created with Cool Edit through my PA/antenna configurarion ... sounded terribly awful and distorted! I suppose, the antenna bandwidth is too small and the PA not really linear enough ... I will do futher experiments. Please everyone feeling disturbed please feel free to tell me immediately ... I don't want to block the entire band ... Best 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15308 invoked from network); 24 Dec 2000 13:01:47 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 24 Dec 2000 13:01:47 -0000 Received: (qmail 13642 invoked from network); 24 Dec 2000 13:04:16 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 24 Dec 2000 13:04:16 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AAjr-0006bx-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Dec 2000 12:58:59 +0000 Received: from ds-img-2.compuserve.com ([149.174.206.135] helo=spdmgaab.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AAjq-0006bs-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 12:58:58 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by spdmgaab.compuserve.com (8.9.3/8.9.3/SUN-1.9) id HAA24822 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 07:58:21 -0500 (EST) Date: Sun, 24 Dec 2000 07:57:34 -0500 From: "'Geri' Kinzel, DK8KW" Subject: LF: QRSS is a full success in USA (correction) To: rsgb_lf_group@blacksheep.org Message-ID: <200012240757_MC2-BFB5-7C7B@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: ... just a brief correction to my table: >- normal CW (12 WPM) -18 dB (level below a certain reference level) - PSK31 -15 dB - BPSK (MS25) -18 dB - BPSK (MS100 ET1) -24 dB - BPSK (MS1000) -33 dB (howver: long time needed to synchronize) - MFSK8 -18 dB - QRSS (0.4 WPM, with Spectran) -27 dB - QRSS (0.4 WPM, with CRUNCH) -33 dB < QRSS with CRUNCH: -30 dB (not 33!) 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29905 invoked from network); 24 Dec 2000 12:43:47 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 24 Dec 2000 12:43:47 -0000 Received: (qmail 25517 invoked from network); 24 Dec 2000 12:46:16 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 24 Dec 2000 12:46:16 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14AAFw-0006VV-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Dec 2000 12:28:04 +0000 Received: from ds-img-4.compuserve.com ([149.174.206.137] helo=spdmgaad.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14AAFv-0006VQ-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 12:28:03 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by spdmgaad.compuserve.com (8.9.3/8.9.3/SUN-1.9) id HAA19146 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 07:27:25 -0500 (EST) Date: Sun, 24 Dec 2000 07:26:56 -0500 From: "'Geri' Kinzel, DK8KW" Subject: LF: QRSS is a full success in USA To: rsgb_lf_group@blacksheep.org Message-ID: <200012240727_MC2-BFB0-ACD4@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello LF-Group, last night (couldn't sleep and was looking out for VE1ZZ ...) I looked a little bit over the fence and read some of the LowFer's messages. Obviously QRSS has found wide acceptance in the US now and, considering the 1 Watt tx input (!) and 50 ft antenna length limitations, remarkable distances of over 1000 miles have been achieved using this technique. You find some of those messages under: http://www.qth.net/archive/lowfer/lowfer.html Lyle, K0LR (the "king of LowFers" as someone called him in a message) has compared various modes, (mixing a signal with real noise) and came to the following conclusions: - normal CW (12 WPM) -18 dB (level below a certain reference level) - PSK31 -15 dB - BPSK (MS25) -18 dB - BPSK (MS100 ET1) -24 dB - BPSK (MS1000) -33 dB (howver: long time needed to synchronize) - MFSK8 -18 dB - QRSS (0.4 WPM, with Spectran) -27 dB - QRSS (0.4 WPM, with CRUNCH) -33 dB you can find more about this test under: http://www.computerpro.com/~lyle/weaksigs/weaksigs.htm Les, N1LF (nice callsign!) is now a strong supporter of QRSS, what Dave, G3YXM provides for us (always the latest LF-news, under http://www.wireless.org.uk/index.htm), Les provides for the LowFer beacon community in the US (http://www.highnoonfilm.com/xmgr/) Best 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26315 invoked from network); 24 Dec 2000 12:13:11 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 24 Dec 2000 12:13:11 -0000 Received: (qmail 20957 invoked from network); 24 Dec 2000 12:16:19 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 24 Dec 2000 12:16:19 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14A9ic-0006LO-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Dec 2000 11:53:38 +0000 Received: from cmailg4.svr.pol.co.uk ([195.92.195.174]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14A9ib-0006LJ-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 11:53:37 +0000 Received: from modem-97.agarwaen.dialup.pol.co.uk ([62.136.99.225] helo=lvm) by cmailg4.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14A9iS-0001dX-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 11:53:29 +0000 Message-ID: <000101c06da0$9ab63040$e163883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. VE1ZZ Date: Sun, 24 Dec 2000 11:56:47 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all, The best signal was at 0000 for about 5mins,later at 0030 it had fallen to T .Pity since I was trying to get the best out of Spectrogram.I think I prefer 60db but didnt finish,Hi. Still, great to know that we can recieve him when condx are not at peak.So roll on the 2 way! 73s Laurie. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29469 invoked from network); 24 Dec 2000 11:03:28 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 24 Dec 2000 11:03:28 -0000 Received: (qmail 6368 invoked from network); 24 Dec 2000 11:06:37 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 24 Dec 2000 11:06:37 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14A8qR-000680-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Dec 2000 10:57:39 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14A8qQ-00067v-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 10:57:38 +0000 Received: from central.zetnet.co.uk (central.zetnet.co.uk [194.247.47.20]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id KAA17805 for ; Sun, 24 Dec 2000 10:57:30 GMT X-ZSender: g3ldo@zetnet.co.uk Message-ID: <2000122411105468199@zetnet.co.uk> Date: Sun, 24 Dec 2000 11:10:54 GMT To: rsgb_lf_group@blacksheep.org From: "Peter Dodd" X-Mailer: ZIMACS Version 1.20c 10000836 Subject: Re: LF: VE1ZZ Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit John Currie, VE1ZJ said: > I believe 10 second dashes were seen by G0MRF right after I first > had the xband qso with Dave I called Jack VE1ZZ on landline and he came on . > Dave heard his 10 second dashes........................... I would have had a problem with 10 second dashes because some of the many Loran lines send slow dashes. However, one of the advantages of the QRSS system we have all been using is that it can detect transmission characteristics. For example, when I was using a signal generator as a driver in the earlier QRSS experiments I had frequency drift and a slight frequency modulation that made the characters look like 'worms' (sort of like ~). I also got to know the characteristics of I5TGC's transmissions during our experiments. When Jack was sending his 10 second dashes he was also (at that time) using a signal generator as an exciter so it should have had some 'characteristic'. He is now using a crystal with a divider circuit so his signal is very stable. > Jack and MM0ALM will also be trying for 2 way with regular cw I believe > MM0ALM put up a larger antenna today. I wish them the best of luck, it is a tough challenge. I have gone as far as I can with the development of my transmitter and antenna is concerned, regarding transmit power. I can now radiate 1 watt erp (according to calculation and measurement) and that is the maximum power I am allowed under the terms of my licence. It would take a very good 'lift' for me to be heard on normal CW in VE but of course this could well happen. During the times I have monitored VE1ZZ I get the feeling that the CFH factor (for the want of a better word) is not the only one has to consider. When monitoring CFH the signal is so strong that it represses the QRN around and only when the it drops below a certain level can you see the signal level bouncing around on the QRN on Alans recordings. The signal from VE1ZZ is much lower of course and is much affected by QRN. VE1ZZ readability appears to be a combination of CFH factor/QRN ratio. Finally, I wish all LFers the best for Christmas and for the Year 2001 -- Regards, Peter, G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17422 invoked from network); 24 Dec 2000 10:07:43 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 24 Dec 2000 10:07:43 -0000 Received: (qmail 9572 invoked from network); 24 Dec 2000 10:10:52 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 24 Dec 2000 10:10:52 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14A81U-0005wr-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Dec 2000 10:05:00 +0000 Received: from mta02-svc.ntlworld.com ([62.253.162.42]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14A81T-0005wm-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 10:04:59 +0000 Received: from oemcomputer ([213.104.106.240]) by mta02-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001224100450.PXRT23225.mta02-svc.ntlworld.com@oemcomputer> for ; Sun, 24 Dec 2000 10:04:50 +0000 Message-ID: <000c01c06d90$df8f42c0$f06a68d5@oemcomputer> From: "mike.dennison" To: rsgb_lf_group@blacksheep.org References: <001201c06d3e$6b6a4360$e1b1883e@lvm> Subject: LF: VE1ZZ / Spectrogram Date: Sun, 24 Dec 2000 10:04:11 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > Hi All > Qrs signals again visible strength O here tonite at 0000 > this really is good! 73s Laurie. For what it is worth, I have heard nothing of VE1ZZ despite listening for hours. Rather high noise level late at night - presumably youngsters using TVs and/or computer games whilst on holiday. To John, G4CNN, try setting your Spectrogram to 30dB resolution instead of 90dB. you will notice a marked improvement. 73 and a Merry Christmas to all. Mike, G3XDV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4578 invoked from network); 24 Dec 2000 09:50:59 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 24 Dec 2000 09:50:59 -0000 Received: (qmail 14810 invoked from network); 24 Dec 2000 09:53:28 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 24 Dec 2000 09:53:28 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14A7l4-0005rY-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Dec 2000 09:48:02 +0000 Received: from carbon.btinternet.com ([194.73.73.92]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14A7l3-0005rT-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 09:48:01 +0000 Received: from [62.7.78.198] (helo=default) by carbon.btinternet.com with smtp (Exim 3.03 #83) id 14A7kv-0001mO-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 09:47:54 +0000 Message-ID: <000f01c06d8d$d1a45cc0$c64e073e@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: VE1ZZ Date: Sun, 24 Dec 2000 09:42:14 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Geri, the best I could manage was a "T/M" signal at 0030 last night. Jack reported twice on the DX Cluster that DCF39 was only weak with him, so it would seem that conditions were not good last night. This is actually very encouraging as I think Laurie was getting a good signal. Happy Christmas de Alan Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9597 invoked from network); 24 Dec 2000 07:35:07 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 24 Dec 2000 07:35:07 -0000 Received: (qmail 26576 invoked from network); 24 Dec 2000 07:38:15 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 24 Dec 2000 07:38:15 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14A5ZJ-0005OT-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Dec 2000 07:27:45 +0000 Received: from ds-img-3.compuserve.com ([149.174.206.136] helo=spdmgaac.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14A5ZI-0005OO-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 07:27:44 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by spdmgaac.compuserve.com (8.9.3/8.9.3/SUN-1.9) id CAA08645 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 02:27:07 -0500 (EST) Date: Sun, 24 Dec 2000 02:25:52 -0500 From: "'Geri' Kinzel, DK8KW" Subject: LF: Re. VE1ZZ To: rsgb_lf_group@blacksheep.org Message-ID: <200012240225_MC2-BFC1-29BC@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello LF-friends, woke up this night and had a look on Spectrogram (using Alan's parameters, they seem to perform really well ...). I could detect VE1ZZ's signal only with a "T" at 02.00 UTC and 03.00 UTC, not nearly as good as yesterday. Vy 73 es Merry Christmas! Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19437 invoked from network); 24 Dec 2000 01:12:18 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 24 Dec 2000 01:12:18 -0000 Received: (qmail 11390 invoked from network); 24 Dec 2000 01:14:47 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 24 Dec 2000 01:14:47 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149zfN-0003zV-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Dec 2000 01:09:37 +0000 Received: from smtp.snet.net ([204.60.6.55]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149zfM-0003zQ-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 01:09:36 +0000 Received: from pop.snet.net (pop.snet.net [204.60.6.9]) by smtp.snet.net (8.11.1/8.11.1/SNET-mx-1.4/D-1.10/O-1.7) with ESMTP id eBO19Ru28676 for ; Sat, 23 Dec 2000 20:09:27 -0500 (EST) Received: from d3e6z4 (trtn-sh7-port67.snet.net [204.60.214.67]) by pop.snet.net (8.11.1/8.11.1/SNET-pop-1.5/D-1.8/O-1.6) with SMTP id eBO19Qf01920 for ; Sat, 23 Dec 2000 20:09:26 -0500 (EST) Message-ID: <008401c06d47$80885da0$43d63ccc@mshome.net> From: "Paul A. Cianciolo" To: rsgb_lf_group@blacksheep.org References: <00b101c06d3e$cdc1bd40$429001d5@default> Subject: LF: Re: Dual speed CW.... Date: Sat, 23 Dec 2000 20:19:02 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Alan, I did get a good laugh from the last line in your email!!! I think it would be simpler to send 2 speeds CW but the proper packaging of characters would satify both users at one time. I also agree that it would not be as effective as QRSS because of the keying and sidebands but I have been able to see traces on spectran of say 6 WPM when I could not copy it by ear,,.. In this case a character can be seen, certainly it woould be different than the 6 WPM ID. Just a thought Thanks for the response Alan. BTW my kids want you to say hello to Santa if you see him since he will visit your part of the world before ours!! Merry Christmas Paulc W1VLF Cloudbounce Webpage http://www.qsl.net/w1vlf/ Rescue Electronic Surplus http://www.rescueelectronics.com 1982 Vanagon Diesel Turbo Diesel 1.9 GE Electrak E20 and E15 electric tractors First place in local tractor pulls at 1750 LBS With Stock E-20 Electric tractor ----- Original Message ----- From: "Alan Melia" To: Sent: Saturday, December 23, 2000 18:48 PM Subject: LF: Dual speed CW.... > Hi Paul, wouldn't it be simpler for the beacon to send alternate 10wpm and > QRSS calls?? the problem is that QRSS is only required when you CAN'T hear > the signal. If you don't transmit solid QRSS dots and dashes you are > throwing away some of the theoretical advantage of being able to integrate > the power in a narrow bandwidth. Personally after listening to it for a > couple of years I find I can read 3 sec dot QRSS by ear....certainly 2 > character calls.... Mind you it may be an effect of encroaching > geriaticity!! > > Happy Christmas de Alan G3NYK > Alan.Melia@btinternet.com > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12913 invoked from network); 24 Dec 2000 00:26:21 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 24 Dec 2000 00:26:21 -0000 Received: (qmail 8004 invoked from network); 24 Dec 2000 00:28:50 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 24 Dec 2000 00:28:50 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149yvj-0003oT-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Dec 2000 00:22:27 +0000 Received: from rhenium.btinternet.com ([194.73.73.93] helo=rhenium) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149yvi-0003oO-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 00:22:26 +0000 Received: from [213.122.196.134] (helo=default) by rhenium with smtp (Exim 3.03 #83) id 149yvQ-00045Y-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 00:22:08 +0000 Message-ID: <00b101c06d3e$cdc1bd40$429001d5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: Dual speed CW.... Date: Sat, 23 Dec 2000 23:48:47 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Paul, wouldn't it be simpler for the beacon to send alternate 10wpm and QRSS calls?? the problem is that QRSS is only required when you CAN'T hear the signal. If you don't transmit solid QRSS dots and dashes you are throwing away some of the theoretical advantage of being able to integrate the power in a narrow bandwidth. Personally after listening to it for a couple of years I find I can read 3 sec dot QRSS by ear....certainly 2 character calls.... Mind you it may be an effect of encroaching geriaticity!! Happy Christmas de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5870 invoked from network); 24 Dec 2000 00:15:52 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 24 Dec 2000 00:15:52 -0000 Received: (qmail 1703 invoked from network); 24 Dec 2000 00:10:45 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 24 Dec 2000 00:10:45 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149ybd-0003kw-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Dec 2000 00:01:41 +0000 Received: from jubilee.ns.sympatico.ca ([142.177.1.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149ybc-0003ke-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 00:01:40 +0000 Received: from ns.sympatico.ca ([142.177.89.59]) by jubilee.ns.sympatico.ca (Post.Office MTA v3.5.2 release 221 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Sat, 23 Dec 2000 20:01:31 -0400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A458343.579C4C2F@ns.sympatico.ca> Date: Sun, 24 Dec 2000 00:01:55 -0500 From: "John Currie" X-Mailer: Mozilla 4.7 [en]C-DIAL (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: VE1ZZ " O O O" at 2305z References: <2000122320563868199@zetnet.co.uk> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Peter. I believe 10 second dashes were seen by G0MRF right after I first had the xband qso with Dave I called Jack VE1ZZ on landline and he came on . Dave heard his 10 second dashes but Jack did not have qrss cap then and all he sent was the dashes. I'm 99 % certain you were the first to receive and identify and record a North American stn in Eu on 136 kHz. Agn congratulations es gl with 2 way Jack and MM0ALM will also be trying for 2 way with regular cw I believe MM0ALM put up a larger antenna today 73 es gl with tests tonight John VE1ZJ Peter Dodd wrote: > Alan said: > > Jack is there with a good signal now the noise is down here, a good > > "0" on QRSS, copiable on 'gram with timescale 750msecs and averaging 5, in > > 0.3Hz bw. > > When I received VE1ZZ I was using Spectran in a low resolution mode > (470 - 540Hz). The reason for that was I was not sure how close the > transmission would be to the stated frequency. As luck would have it > the signal was clearly readable at that resolution and I was loath to > change it until I had the full callsign and had it recorded. > It might be the first time (21/21/00 at 0030UTC) a clearly > idendifyable call has been received this side of the Atlantic from > North America on 136kHz but I guess you can put me right. > I do not have a web page but it could be put on Dave's or Rik's web > page if it is regarded as sufficiently important. > > Last night I missed the main opening at 2300 because (and you may > have difficulty envisaging this!) it is our 'Come Dancing' night. I > switched on at 0015 and saw only Loran lines. Later a very strong > signal came on frequency and played some musical notes. Later a QRSS > signal appeared but only R 'T'. > > -- > Regards, Peter, G3LDO > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3771 invoked from network); 24 Dec 2000 00:14:00 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 24 Dec 2000 00:14:00 -0000 Received: (qmail 3728 invoked from network); 24 Dec 2000 00:17:08 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 24 Dec 2000 00:17:08 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149ykX-0003nn-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Dec 2000 00:10:53 +0000 Received: from mail1.svr.pol.co.uk ([195.92.193.18]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149ykT-0003nf-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 00:10:50 +0000 Received: from modem-225.ekkaia.dialup.pol.co.uk ([62.136.177.225] helo=lvm) by mail1.svr.pol.co.uk with smtp (Exim 3.13 #0) id 149ykK-0001Vc-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Dec 2000 00:10:40 +0000 Message-ID: <001201c06d3e$6b6a4360$e1b1883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. VE1ZZ Date: Sun, 24 Dec 2000 00:13:41 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi All Qrs signals again visible strength O here tonite at 0000 this really is good! 73s Laurie. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12840 invoked from network); 23 Dec 2000 23:04:55 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 23 Dec 2000 23:04:55 -0000 Received: (qmail 5620 invoked from network); 23 Dec 2000 22:59:50 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 23 Dec 2000 22:59:50 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149xXr-0003PW-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Dec 2000 22:53:43 +0000 Received: from morpheus.skynet.be ([195.238.2.39]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149xXq-0003PR-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 22:53:42 +0000 Received: from mh70i (free2309.powered-by.skynet.be [62.4.137.5]) by morpheus.skynet.be (Postfix) with SMTP id 57460E675 for ; Sat, 23 Dec 2000 23:53:34 +0100 (MET) Message-ID: <000b01c06d33$5a5edd20$0589043e@mh70i> From: "DE BONDT WERNER" To: rsgb_lf_group@blacksheep.org Subject: LF: mm0alm Date: Sat, 23 Dec 2000 23:54:47 +0100 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Hello All
 
Dave MM0ALM was -- 85 db on my Pegelmesser
And 15 db S/N at 22u40     23-12-2000
Antenna is coax loop abt 40meters coax tuned .
 
All the vy best for 20001 and for nw MARRY CHRISTMAS
 
Werner  ON6ND
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13906 invoked from network); 23 Dec 2000 21:29:01 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 23 Dec 2000 21:29:01 -0000 Received: (qmail 25957 invoked from network); 23 Dec 2000 21:31:30 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 23 Dec 2000 21:31:30 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149wAO-00035I-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Dec 2000 21:25:24 +0000 Received: from smtp.snet.net ([204.60.6.55]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149wAM-00035D-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 21:25:23 +0000 Received: from pop.snet.net (pop.snet.net [204.60.6.9]) by smtp.snet.net (8.11.1/8.11.1/SNET-mx-1.4/D-1.10/O-1.7) with ESMTP id eBNLPBu26188; Sat, 23 Dec 2000 16:25:11 -0500 (EST) Received: from d3e6z4 (trtn-sh7-port67.snet.net [204.60.214.67]) by pop.snet.net (8.11.1/8.11.1/SNET-pop-1.5/D-1.8/O-1.6) with SMTP id eBNLPAf29528; Sat, 23 Dec 2000 16:25:10 -0500 (EST) Message-ID: <005801c06d28$2b1834e0$43d63ccc@mshome.net> From: "Paul A. Cianciolo" To: lowfer@qth.net, rsgb_lf_group@blacksheep.org Subject: LF: Dual speed CW or another crazy idea Date: Sat, 23 Dec 2000 16:34:44 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Folks, There has been a lot of talk lately about QRSS an the success at copying beacons using this mode. I have always been interested in this mode. One drawback of course is the difficulty in copying by ear. The low speed CW works well with FFT programs like SPECTRAN EZ-GRAM but so good with the human ear. After spending many hours looking at the computer screen and FFT programs I got to wondering if a dual mode CW ID string was not possible. For instance.... A beacon about 60 miles from here with a good copy id "RI" With FFT programs at the fastest speed you can see the dits and dahs of the letters, RI The beacon is sending at maybe 10 WPM(Guess). Good for the ear. not so good for FFT. But if you look at the RI in BW normally resevered much slower CW rate, the letters all blur together and you get the letter "N" repeated. Not a perfect "N" but it could probably be made to look more accurate by the proper choice of letters. Someone could probably figure out what combinations of letters could be used for a dual mode CW like this........ Does this sound crazy? I may have been staring at the computer screen too long when I got this idea. I'll risk the embarrasement.... please comment to the groups. Thank you for reading this Paulc W1VLF Cloudbounce Webpage http://www.qsl.net/w1vlf/ Rescue Electronic Surplus http://www.rescueelectronics.com 1982 Vanagon Diesel Turbo Diesel 1.9 GE Electrak E20 and E15 electric tractors First place in local tractor pulls at 1750 LBS With Stock E-20 Electric tractor From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10641 invoked from network); 23 Dec 2000 20:51:28 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 23 Dec 2000 20:51:28 -0000 Received: (qmail 11511 invoked from network); 23 Dec 2000 20:53:57 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 23 Dec 2000 20:53:57 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149vWd-0002xI-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Dec 2000 20:44:19 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149vWa-0002xD-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 20:44:16 +0000 Received: from central.zetnet.co.uk (central.zetnet.co.uk [194.247.47.20]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id UAA13450 for ; Sat, 23 Dec 2000 20:44:09 GMT X-ZSender: g3ldo@zetnet.co.uk Message-ID: <2000122320563868199@zetnet.co.uk> Date: Sat, 23 Dec 2000 20:56:38 GMT To: rsgb_lf_group@blacksheep.org From: "Peter Dodd" X-Mailer: ZIMACS Version 1.20c 10000836 Subject: Re: LF: VE1ZZ " O O O" at 2305z Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Alan said: > Jack is there with a good signal now the noise is down here, a good > "0" on QRSS, copiable on 'gram with timescale 750msecs and averaging 5, in > 0.3Hz bw. When I received VE1ZZ I was using Spectran in a low resolution mode (470 - 540Hz). The reason for that was I was not sure how close the transmission would be to the stated frequency. As luck would have it the signal was clearly readable at that resolution and I was loath to change it until I had the full callsign and had it recorded. It might be the first time (21/21/00 at 0030UTC) a clearly idendifyable call has been received this side of the Atlantic from North America on 136kHz but I guess you can put me right. I do not have a web page but it could be put on Dave's or Rik's web page if it is regarded as sufficiently important. Last night I missed the main opening at 2300 because (and you may have difficulty envisaging this!) it is our 'Come Dancing' night. I switched on at 0015 and saw only Loran lines. Later a very strong signal came on frequency and played some musical notes. Later a QRSS signal appeared but only R 'T'. -- Regards, Peter, G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5739 invoked from network); 23 Dec 2000 18:00:20 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 23 Dec 2000 18:00:20 -0000 Received: (qmail 22188 invoked from network); 23 Dec 2000 18:02:48 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 23 Dec 2000 18:02:48 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149sqO-0002Js-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Dec 2000 17:52:32 +0000 Received: from tomts8.bellnexxia.net ([209.226.175.52] helo=tomts8-srv.bellnexxia.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149sqN-0002Jn-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 17:52:31 +0000 Received: from server1 ([216.209.110.168]) by tomts8-srv.bellnexxia.net (InterMail vM.4.01.03.00 201-229-121) with SMTP id <20001223175152.UXSA9566.tomts8-srv.bellnexxia.net@server1> for ; Sat, 23 Dec 2000 12:51:52 -0500 Message-ID: <002101c06d09$08cfc020$0a00a8c0@ThreeLakes.ca> From: "Larry Kayser" To: rsgb_lf_group@blacksheep.org References: <27085787.977569294279.JavaMail.imail@almond.excite.com> Subject: LF: Listening tonight Date: Sat, 23 Dec 2000 12:51:45 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Greetings All in Europe: I will be listening tonight from 20 utc onwards on 136.500 from 10 after to 30 after, then 40 after to the top of the hour. I have copied a number of one, two and three letter groups of calls known to me in previous nights. Today I have made some minor improvements in the receiving system here so tonight has prospects for being pretty good. I will email at 03utc tomorrow morning with results Larry VA3LK From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29180 invoked from network); 23 Dec 2000 14:44:38 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 23 Dec 2000 14:44:38 -0000 Received: (qmail 17003 invoked from network); 23 Dec 2000 14:47:06 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 23 Dec 2000 14:47:06 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149ppy-0001cb-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Dec 2000 14:39:54 +0000 Received: from smtp-1.visp.telinco.net ([212.1.130.1]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149ppx-0001cW-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 14:39:53 +0000 Received: from [212.1.149.56] (helo=g4jnt) by smtp-1.visp.telinco.net with smtp (Exim 3.16 #1) id 149pjF-0001yI-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 14:32:58 +0000 Message-ID: <001101c06ced$d88c5ba0$389501d4@g4jnt> From: "Andrew Talbot" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: search for old slowcw Date: Sat, 23 Dec 2000 14:35:59 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.1 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I have now done a quick fix on SLOWCW to use LPT1 for keying rather than a COM port. Anyone wanting this facility please contact me directly at this EMail address for a copy. Andy G4JNT From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7595 invoked from network); 23 Dec 2000 14:25:26 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 23 Dec 2000 14:25:26 -0000 Received: (qmail 3035 invoked from network); 23 Dec 2000 14:20:22 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 23 Dec 2000 14:20:22 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149pS1-0001Z2-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Dec 2000 14:15:09 +0000 Received: from smtp-1.visp.telinco.net ([212.1.130.1]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149pS0-0001Yx-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 14:15:08 +0000 Received: from [212.1.136.240] (helo=g4jnt) by smtp-1.visp.telinco.net with smtp (Exim 3.16 #1) id 149pK7-0000k4-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 14:07:00 +0000 Message-ID: <002701c06cea$37f62840$f08801d4@g4jnt> From: "Andrew Talbot" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: search for old slowcw Date: Sat, 23 Dec 2000 14:11:16 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.1 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I wrote the origianl SLOWCW prog, but all versions of that now use the serial port. However, if you want a version for the parallel port I'll modify the software now and let you have it in a short while. SLOWCW.EXE has gone though a number of enhancements since it first appeared so won't look familiar if you've used an earlier version. I'll toggle D0 the lines on LPT1: Andy G4JNT -----Original Message----- From: Claudio To: rsgb_lf_group@blacksheep.org Date: 22 December 2000 23:43 Subject: LF: search for old slowcw >HI Lowfers, > >my new laptop (toshiba Satellite 1710CDS) has no RS-232 ports. Only one parallel >port and two usb ports. So I have to resume an old 80286 MS-DOS only PC for >transmitting purpose. I'm searching for an old plain vanilla DOS version of >slowcw.exe program. Can anyone help me? > >I hope to be active in QRSS fron 26 or 27 december. > >Thanks in advance and Merry Christmas and Happy New Year to all > >Claudio >---------------------------------------------------------------------- >Claudio Pozzi http://www.qsl.net/ik2pii happy Linux user >E-Mail: Claudio >Date: 23-Dec-00 Time: 00:07:46 >This message was sent by XFMail >---------------------------------------------------------------------- > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28863 invoked from network); 23 Dec 2000 13:41:25 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 23 Dec 2000 13:41:25 -0000 Received: (qmail 1405 invoked from network); 23 Dec 2000 13:43:52 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 23 Dec 2000 13:43:52 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149osw-0001PQ-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Dec 2000 13:38:54 +0000 Received: from [212.159.14.225] (helo=murphys-outbound.servers.plus.net) by post.thorcom.com with smtp (Exim 3.16 #1) id 149osv-0001PL-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 13:38:53 +0000 Received: (qmail 28195 invoked from network); 23 Dec 2000 13:38:14 -0000 Received: from unknown (HELO picks) (212.159.39.37) by murphys with SMTP; 23 Dec 2000 13:38:14 -0000 Message-ID: <001701c06ce6$890a37c0$25279fd4@f9.net.uk> From: "Dave" To: "LF Group" Subject: LF: EI beacon Date: Sat, 23 Dec 2000 13:44:55 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear all. Finbar EI0CF will be running his QRP beacon on 137.760 (now crystal controlled so no drifting!) over the next few days. Very useful if you're doing RX tests over the holiday. I don't know whether he's offering a prize for the furthest DX report.... Reports direct to him as he's not on the reflector at present. beachwood@eircom.net 73. Dave G3YXM. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22430 invoked from network); 23 Dec 2000 13:34:43 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 23 Dec 2000 13:34:43 -0000 Received: (qmail 27612 invoked from network); 23 Dec 2000 13:37:11 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 23 Dec 2000 13:37:11 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149olY-0001P5-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Dec 2000 13:31:16 +0000 Received: from mta02-svc.ntlworld.com ([62.253.162.42]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149olX-0001P0-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 13:31:15 +0000 Received: from compaq ([62.253.89.64]) by mta02-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001223133103.KMUN23225.mta02-svc.ntlworld.com@compaq> for ; Sat, 23 Dec 2000 13:31:03 +0000 Message-ID: <009b01c06ce4$9b0df3a0$4059fd3e@compaq> From: "tracey.gardner" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Re: RE reflector slow Date: Sat, 23 Dec 2000 13:23:16 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Alan I'd echo Steve's comments. I'm on a number of e-group lists and haven't noticed any delays at any time of day. 73s Tracey >G'day Alan, > >> Are the egoups hosted in the States?? I wonder whether >> we would see egroups that quickly if the 'lines' to the States were >> overloaded as often happens at 1800-2400z and at weekends. > >Yes, they are hosted in the US. Have posted at all hours and days and only >noticed a delay when the site has been down (only once in a year or so) > >73s Steve Olney (VK2ZTO/AXSO - QF56IK : Lat -33 34 07, Long +150 44 40) >============================================= > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6459 invoked from network); 23 Dec 2000 11:14:07 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 23 Dec 2000 11:14:07 -0000 Received: (qmail 15113 invoked from network); 23 Dec 2000 11:09:03 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 23 Dec 2000 11:09:03 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149mRA-0000n8-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Dec 2000 11:02:04 +0000 Received: from kuku-rwcmta.excite.com ([198.3.99.63] helo=kuku.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149mR9-0000n3-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 11:02:03 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by kuku.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001223110134.SVTS11766.kuku.excite.com@almond.excite.com> for ; Sat, 23 Dec 2000 03:01:34 -0800 Message-ID: <27085787.977569294279.JavaMail.imail@almond.excite.com> Date: Sat, 23 Dec 2000 03:01:27 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re. VE1ZZ Transmissio MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 62.253.64.5 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Laurie, I started with Spectran, because it is extremely sensitive at the highest resolution and I wanted to be sure it was not a Loran Line, all of which in the vicinity I had identified earlier. When Jack started at 23.00, it was immediately obvious that it was he, but by the time I had messed about with settings, the first 10 minutes had gone. It is my experience and this again confirms it, that Spectrogram is better for Slow Morse, although perhaps I got the averaging wrong with Spectran. Then I saw that Alan had pipped me to the post and furthermore gave ideal settings. So they are not my settings, they are Alans. The complete set are: Sample Rate 5.5 kHz Range 90 dB, Gain 5 dB and I set -52.5 dB to yellow from the File Colour palette menu, to get good contrast. Time Scale 750 mS (another try with 500mS was not as good). FFT Point size 16k Band 770 - 856 to span 800. Spectrum Average 5. I didn't use the save but instead used the capture facility of Paint Shop Pro and then cropped out the call sign. Some of the success must also go to my new loop antenna (now that I have got the pre-amp sorted), which is performing really well (12 dB better) when there is no local QRM. With an OOO signal like this, you guys with 1W ERP should be able to make the 2-way soon. A Merry Christmas and Happy New Year to all the great friends I have made in the Lowfer community. John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3400 invoked from network); 23 Dec 2000 10:29:32 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 23 Dec 2000 10:29:32 -0000 Received: (qmail 14782 invoked from network); 23 Dec 2000 10:32:00 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 23 Dec 2000 10:32:00 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149lqw-0000c7-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Dec 2000 10:24:38 +0000 Received: from cmailg3.svr.pol.co.uk ([195.92.195.173]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149lqv-0000c2-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 10:24:37 +0000 Received: from modem-28.belegund.dialup.pol.co.uk ([62.136.138.28] helo=lvm) by cmailg3.svr.pol.co.uk with smtp (Exim 3.13 #0) id 149lql-0001Mz-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 10:24:28 +0000 Message-ID: <000101c06ccb$00272460$1c8a883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. VE1ZZ Transmissio Date: Sat, 23 Dec 2000 10:27:47 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi John, Many thanks for the images on your web site-the spectran(first one) is similar to the image I recieved,but your spectrogram is really excellent.Would you mind giving the settings you used?I would really like to get as good an image as that on such a signal. Best wishes for Xmas. Laurie From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26725 invoked from network); 23 Dec 2000 09:09:11 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 23 Dec 2000 09:09:11 -0000 Received: (qmail 7316 invoked from network); 23 Dec 2000 09:11:39 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 23 Dec 2000 09:11:39 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149kXr-00004w-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Dec 2000 09:00:51 +0000 Received: from fepf.post.tele.dk ([195.41.46.135]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149kXm-00004r-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 09:00:47 +0000 Received: from max ([195.249.152.136]) by fepF.post.tele.dk (InterMail vM.4.01.03.00 201-229-121) with SMTP id <20001223090039.EBOE326.fepF.post.tele.dk@max> for ; Sat, 23 Dec 2000 10:00:39 +0100 From: "Max Jens Jensen" To: rsgb_lf_group@blacksheep.org Subject: LF: Greetings Date: Sat, 23 Dec 2000 09:57:58 +0100 Message-ID: <000101c06cbe$72a9f1a0$8898f9c3@max> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Importance: Normal In-reply-to: <200012222227_MC2-BFAB-B235@compuserve.com> Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello all I send a merry Christmas wish to all on VLF list, and all the best in the new Millinium. Keep up the good work Vy 73 de OZ7AFF Max From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25107 invoked from network); 23 Dec 2000 03:33:10 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 23 Dec 2000 03:33:10 -0000 Received: (qmail 2092 invoked from network); 23 Dec 2000 03:35:37 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 23 Dec 2000 03:35:37 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149fMW-0007L6-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Dec 2000 03:28:48 +0000 Received: from ds-img-7.compuserve.com ([149.174.206.153] helo=spdmbaaa.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149fMV-0007L1-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 03:28:47 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by spdmbaaa.compuserve.com (8.9.3/8.9.3/SUN-1.9) id WAA03015 for rsgb_lf_group@blacksheep.org; Fri, 22 Dec 2000 22:28:09 -0500 (EST) Date: Fri, 22 Dec 2000 22:27:38 -0500 From: "'Geri' Kinzel, DK8KW" Subject: LF: Re. VE1ZZ To: rsgb_lf_group@blacksheep.org Message-ID: <200012222227_MC2-BFAB-B235@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello LF-Group, I copied VE1ZZ's QRSS transmission here in JO52BH this night with an "M" report, but clearly identified. I will post a screenshot on my web-page tomorrow ... reminds me of the excitement when I first saw and identified Peter Bobek's (DJ8WL) signal with FFT-DSP some years ago ... Does anyone have his QTH locator? Vy 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23802 invoked from network); 23 Dec 2000 02:26:09 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 23 Dec 2000 02:26:09 -0000 Received: (qmail 12218 invoked from network); 23 Dec 2000 02:21:04 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 23 Dec 2000 02:21:04 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149eE2-00070f-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Dec 2000 02:15:58 +0000 Received: from mailman.zeta.org.au ([203.26.10.16]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149eE0-00070a-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 02:15:57 +0000 Received: from steve (ppp200.dyn154.pacific.net.au [210.23.154.200]) by mailman.zeta.org.au (8.9.3/8.8.7) with SMTP id NAA16479 for ; Sat, 23 Dec 2000 13:15:44 +1100 Message-ID: <003201c06c86$7f633740$0301a8c0@steve> From: "Steve Olney" To: rsgb_lf_group@blacksheep.org References: <000601c06c82$b4b9d600$729201d5@default> Subject: LF: Re: RE reflector slow Date: Sat, 23 Dec 2000 13:15:00 +1100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: G'day Alan, > Hi Steve well I guess the electricity has to struggle its way uphill from > where you are Hi! Plus the electrons would have to flip over in their orbits. > Are the egoups hosted in the States?? I wonder whether > we would see egroups that quickly if the 'lines' to the States were > overloaded as often happens at 1800-2400z and at weekends. Yes, they are hosted in the US. Have posted at all hours and days and only noticed a delay when the site has been down (only once in a year or so) 73s Steve Olney (VK2ZTO/AXSO - QF56IK : Lat -33 34 07, Long +150 44 40) ============================================= HomePage URLs: http://www.qsl.net/vk2zto http://www.zeta.org.au/~ollaneg Containing:- ULF, ELF, VLF & LF Experimentation InfraSonic Experimentation Laser Comms DX Amateur Radio Astronomy ============================================= From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11530 invoked from network); 23 Dec 2000 02:07:56 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 23 Dec 2000 02:07:56 -0000 Received: (qmail 29521 invoked from network); 23 Dec 2000 02:02:51 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 23 Dec 2000 02:02:51 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149duQ-0006uh-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Dec 2000 01:55:42 +0000 Received: from [194.73.73.176] (helo=protactinium) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149duQ-0006uc-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 01:55:42 +0000 Received: from [213.1.146.114] (helo=default) by protactinium with smtp (Exim 3.03 #83) id 149duI-00032m-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 01:55:35 +0000 Message-ID: <000601c06c82$b4b9d600$729201d5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: RE reflector slow Date: Sat, 23 Dec 2000 00:23:02 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Steve well I guess the electricity has to struggle its way uphill from where you are Hi! Are the egoups hosted in the States?? I wonder whether we would see egroups that quickly if the 'lines' to the States were overloaded as often happens at 1800-2400z and at weekends. Cheers de Alan G3NYK From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13937 invoked from network); 23 Dec 2000 00:51:28 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 23 Dec 2000 00:51:28 -0000 Received: (qmail 6330 invoked from network); 23 Dec 2000 00:53:57 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 23 Dec 2000 00:53:57 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149cqY-0006Xx-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Dec 2000 00:47:38 +0000 Received: from cmailg2.svr.pol.co.uk ([195.92.195.172]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149cqY-0006Xs-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 00:47:38 +0000 Received: from modem-17.bauglir.dialup.pol.co.uk ([62.136.136.17] helo=lvm) by cmailg2.svr.pol.co.uk with smtp (Exim 3.13 #0) id 149cqQ-0002hD-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 00:47:31 +0000 Message-ID: <000801c06c7a$669c40a0$1188883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. VE1ZZ Date: Sat, 23 Dec 2000 00:49:04 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: VE1ZZ readable here at 2330, not so good now (0030) but still visible. 73s Laurie. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19635 invoked from network); 23 Dec 2000 00:38:10 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 23 Dec 2000 00:38:10 -0000 Received: (qmail 26334 invoked from network); 23 Dec 2000 00:41:19 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 23 Dec 2000 00:41:19 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149cdA-0006X7-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Dec 2000 00:33:48 +0000 Received: from bucky-rwcmex.excite.com ([198.3.99.218] helo=bucky.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149cd8-0006X2-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 00:33:46 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by bucky.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001223003317.FFBB25756.bucky.excite.com@almond.excite.com> for ; Fri, 22 Dec 2000 16:33:17 -0800 Message-ID: <25995210.977531597482.JavaMail.imail@almond.excite.com> Date: Fri, 22 Dec 2000 16:33:14 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: LF: VE1ZZ transmission received MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 62.253.64.5 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi All, VE1ZZ transmission clearly seen in each 10 minute window from first at 23.00 22 Decembre. I have posted a Spectran image of Jack's call sign on my web page at http://www.g4cnn.f2s.com. Please note that this web site is in the process of construction and not all links are present yet. John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11289 invoked from network); 23 Dec 2000 00:18:40 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 23 Dec 2000 00:18:40 -0000 Received: (qmail 21681 invoked from network); 23 Dec 2000 00:21:07 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 23 Dec 2000 00:21:07 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149cIs-0006UG-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Dec 2000 00:12:50 +0000 Received: from mailman.zeta.org.au ([203.26.10.16]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149cIq-0006UB-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 00:12:49 +0000 Received: from steve (ppp165.dyn154.pacific.net.au [210.23.154.165]) by mailman.zeta.org.au (8.9.3/8.8.7) with SMTP id LAA11840 for ; Sat, 23 Dec 2000 11:12:35 +1100 Message-ID: <00f701c06c75$4b070aa0$0301a8c0@steve> From: "Steve Olney" To: rsgb_lf_group@blacksheep.org References: <003901c06c6d$e839a1a0$77d47ad5@default> <00d401c06c72$bbb5cfa0$0301a8c0@steve> Subject: LF: Re: Re: re e-groups...reflector slow Date: Sat, 23 Dec 2000 11:14:11 +1100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: G'day Alan, Here is the results of a parallel post to the RSGB group and my egroup (lofexp@egroups.com). Post Sent: 10:55:00 AM Appeared from egroup: 10:55:40 (elapsed time 40 seconds) Appeared RSGB group: 11:05:20 (elapsed time 10 minutes and 20 seconds) Only a sample of one but accords well with previous experience. Call me impatient, ungrateful, a whinger, etc, but I call that slow :-) P.S. Anybody is welcome to subscribe to the low frequency experimenters group (lofexp@egroups.com) :-) 73s Steve Olney (VK2ZTO/AXSO - QF56IK : Lat -33 34 07, Long +150 44 40) ============================================= HomePage URLs: http://www.qsl.net/vk2zto http://www.zeta.org.au/~ollaneg Containing:- ULF, ELF, VLF & LF Experimentation InfraSonic Experimentation Laser Comms DX Amateur Radio Astronomy ============================================= From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14137 invoked from network); 22 Dec 2000 23:59:43 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 22 Dec 2000 23:59:43 -0000 Received: (qmail 29058 invoked from network); 23 Dec 2000 00:02:51 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 23 Dec 2000 00:02:51 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149c1K-0006JP-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 22 Dec 2000 23:54:42 +0000 Received: from mailman.zeta.org.au ([203.26.10.16]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149c1I-0006JK-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Dec 2000 23:54:41 +0000 Received: from steve (ppp165.dyn154.pacific.net.au [210.23.154.165]) by mailman.zeta.org.au (8.9.3/8.8.7) with SMTP id KAA10945; Sat, 23 Dec 2000 10:54:16 +1100 Message-ID: <00d401c06c72$bbb5cfa0$0301a8c0@steve> From: "Steve Olney" To: "LowFexp" , rsgb_lf_group@blacksheep.org References: <003901c06c6d$e839a1a0$77d47ad5@default> Subject: LF: Re: re e-groups...reflector slow Date: Sat, 23 Dec 2000 10:55:09 +1100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: G'day Alan, The RSGB reflector is always slow from here down-under - so much so that I sometimes wonder if the post had got lost. Nothing to do with my ISP. E-groups posts (sample of over a year now) have always appeared within 1 or 2 minutes for me. Multiple posts to different groups always results in e-groups appearing well before others. Don't think my ISP has a go-slow filter for UK posts, but I will check :-) Could have something to do with going west to the UK (going backwards in time zones) and going east to the US (going forwards in time zones). Or the RSGB reflector could possibly be just plain old slow :-) 73s Steve Olney (VK2ZTO/AXSO - QF56IK : Lat -33 34 07, Long +150 44 40) ============================================= HomePage URLs: http://www.qsl.net/vk2zto http://www.zeta.org.au/~ollaneg Containing:- ULF, ELF, VLF & LF Experimentation InfraSonic Experimentation Laser Comms DX Amateur Radio Astronomy ============================================= From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8093 invoked from network); 22 Dec 2000 23:38:55 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 22 Dec 2000 23:38:55 -0000 Received: (qmail 18564 invoked from network); 22 Dec 2000 23:33:49 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 22 Dec 2000 23:33:50 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149baP-0006BI-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 22 Dec 2000 23:26:53 +0000 Received: from gadolinium.btinternet.com ([194.73.73.111]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149baO-0006BD-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Dec 2000 23:26:52 +0000 Received: from [213.122.212.119] (helo=default) by gadolinium.btinternet.com with smtp (Exim 3.03 #83) id 149baH-0001Uo-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Dec 2000 23:26:45 +0000 Message-ID: <003901c06c6d$e839a1a0$77d47ad5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: re e-groups...reflector slow Date: Fri, 22 Dec 2000 23:21:23 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi I think if it is slow you may need to have words with your ISP, My recent posting about VE1ZZ appeared in the reflector within 1 minute of posting. They dont always, but then from my experience e-groups sometimes slow as well. We can't easily monitor activity in two places at once. Cheers de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21966 invoked from network); 22 Dec 2000 23:28:23 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 22 Dec 2000 23:28:23 -0000 Received: (qmail 6591 invoked from network); 22 Dec 2000 23:30:52 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 22 Dec 2000 23:30:52 -0000 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149bME-00061N-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 22 Dec 2000 23:12:14 +0000 Received: from mail-6.tiscalinet.it ([195.130.225.152] helo=mail.tiscalinet.it) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149bMD-00061B-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Dec 2000 23:12:13 +0000 Received: from orion.pii.net (62.11.55.200) by mail.tiscalinet.it (5.5.015.3) id 3A40DD4B00074F35 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 00:11:22 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from clapo@localhost) by orion.pii.net (8.9.3/8.9.3) id AAA00803 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2000 00:16:14 +0100 Message-ID: X-Mailer: XFMail 1.3 [p0] on Linux X-Priority: 3 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit MIME-Version: 1.0 Date: Sat, 23 Dec 2000 00:16:14 +0100 (CET) From: "Claudio" To: rsgb_lf_group@blacksheep.org Subject: LF: search for old slowcw Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: HI Lowfers, my new laptop (toshiba Satellite 1710CDS) has no RS-232 ports. Only one parallel port and two usb ports. So I have to resume an old 80286 MS-DOS only PC for transmitting purpose. I'm searching for an old plain vanilla DOS version of slowcw.exe program. Can anyone help me? I hope to be active in QRSS fron 26 or 27 december. Thanks in advance and Merry Christmas and Happy New Year to all Claudio ---------------------------------------------------------------------- Claudio Pozzi http://www.qsl.net/ik2pii happy Linux user E-Mail: Claudio Date: 23-Dec-00 Time: 00:07:46 This message was sent by XFMail ---------------------------------------------------------------------- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 537 invoked from network); 22 Dec 2000 23:16:19 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 22 Dec 2000 23:16:19 -0000 Received: (qmail 28749 invoked from network); 22 Dec 2000 23:19:28 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 22 Dec 2000 23:19:28 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149bM9-00061H-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 22 Dec 2000 23:12:09 +0000 Received: from [194.73.73.138] (helo=ruthenium) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149bM8-00061C-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Dec 2000 23:12:08 +0000 Received: from [213.122.212.119] (helo=default) by ruthenium with smtp (Exim 3.03 #83) id 149bM1-0006Ox-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Dec 2000 23:12:01 +0000 Message-ID: <000a01c06c6b$d91c87c0$77d47ad5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: VE1ZZ " O O O" at 2305z Date: Fri, 22 Dec 2000 23:05:52 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all , Jack is there with a good signal now the noise is down here, a good "0" on QRSS, copiable on 'gram with timescale 750msecs and averaging 5, in 0.3Hz bw. Good luck all. de Alan G3NYK JO02PB Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25795 invoked from network); 22 Dec 2000 19:35:58 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 22 Dec 2000 19:35:58 -0000 Received: (qmail 22507 invoked from network); 22 Dec 2000 19:38:27 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 22 Dec 2000 19:38:27 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149Xfu-000550-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 22 Dec 2000 19:16:18 +0000 Received: from email.cwcom.net ([195.44.0.104] helo=cwcom.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149Xfr-00054v-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Dec 2000 19:16:15 +0000 Received: from computer ([195.44.6.108]) by cwcom.net with Microsoft SMTPSVC(5.5.1877.537.53); Fri, 22 Dec 2000 19:14:16 +0000 Message-ID: <00bc01c06c4b$c73bb5a0$10cb2cc3@computer> From: "OSCURA" To: rsgb_lf_group@blacksheep.org References: <001001c06c2b$4c6ed7a0$2d6a68d5@oemcomputer> Subject: LF: Re: e groups Date: Fri, 22 Dec 2000 19:17:04 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Another good reason for using an egroup is the speed of up date. this group seems to take around an hour for a message to appear. The e group offers a chat room that we could give us immediate feedback on transmissions. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13512 invoked from network); 22 Dec 2000 15:44:31 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 22 Dec 2000 15:44:31 -0000 Received: (qmail 1058 invoked from network); 22 Dec 2000 15:47:00 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 22 Dec 2000 15:47:00 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149U4R-0003yn-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 22 Dec 2000 15:25:23 +0000 Received: from mta01-svc.ntlworld.com ([62.253.162.41]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149U4R-0003yi-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Dec 2000 15:25:23 +0000 Received: from oemcomputer ([213.104.106.45]) by mta01-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001222152515.KGKF6427.mta01-svc.ntlworld.com@oemcomputer> for ; Fri, 22 Dec 2000 15:25:15 +0000 Message-ID: <001001c06c2b$4c6ed7a0$2d6a68d5@oemcomputer> From: "mike.dennison" To: rsgb_lf_group@blacksheep.org Subject: LF: 73kHz Date: Fri, 22 Dec 2000 15:24:36 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I will be on 71.605kHz QRSS this evening. I will check the 73k band, then 137.7kHz for replies. Mike, G3XDV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2371 invoked from network); 22 Dec 2000 15:34:29 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 22 Dec 2000 15:34:29 -0000 Received: (qmail 19653 invoked from network); 22 Dec 2000 15:36:57 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 22 Dec 2000 15:36:57 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149TwI-0003xu-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 22 Dec 2000 15:16:58 +0000 Received: from jubilee.ns.sympatico.ca ([142.177.1.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149TwH-0003xp-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Dec 2000 15:16:57 +0000 Received: from ns.sympatico.ca ([142.177.211.85]) by jubilee.ns.sympatico.ca (Post.Office MTA v3.5.2 release 221 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Fri, 22 Dec 2000 11:16:18 -0400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A43E34F.C055D690@ns.sympatico.ca> Date: Fri, 22 Dec 2000 15:27:12 -0800 From: "John Currie" X-Mailer: Mozilla 4.73 [en] (Win95; U) X-Accept-Language: en,pdf MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: VE1ZZ References: <3.0.1.16.20001221142112.2def97da@mail.cc.kuleuven.ac.be> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Rik and all. I just spoke to Jack on telephone. He will start transmitting tonight, 22 Dec at 2300 and continue until 0200Z . Freq 136.5 kHz. Jack transmits for 10 minutes crss 9 second dashes. He will transmit on the hour and the half hour. Tomorrow he will transmit from 2300 til 0400z in same fashion MM0ALM is trying to set up cw sked if I get info i will send it here Please inform MM0ALM he shud transmit around 135.7. CFH will not permin reception of normal cw above about 135.8 73 gl mri xmas to all John VE1ZJ Rik Strobbe wrote: > Congrats to Peter and Jack. > > Regarding transatlantic tests : based on the CFH plots there seem to be 2 > periods with the best chance on enhanced propagation, one arround 00-02 UTC > and and arround 05-07 UTC. Is Jack also transmitting during this last period ? > I will look for hime during the coming nights. > > 73, Rik > > At 01:42 21/12/00 GMT, you wrote: > >Received QRSS signals from VE1ZZ at 0030UTC 21/12/00 on 136.502kHz. > > > >Readability 'O' degrading to 'M' later > > > >QRSS a bit fast with a dash speed of 4 seconds (approx) > > > >CFH off so relative conditions unknown > > > > > >-- > >Regards, Peter, G3LDO > > > > > > > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19551 invoked from network); 22 Dec 2000 14:05:30 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 22 Dec 2000 14:05:30 -0000 Received: (qmail 24450 invoked from network); 22 Dec 2000 14:07:59 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 22 Dec 2000 14:07:59 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149Sgd-0003Xb-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 22 Dec 2000 13:56:43 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from d12lmsgate-3.de.ibm.com ([195.212.91.201]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149Sgc-0003X9-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Dec 2000 13:56:42 +0000 Received: from d06relay02.portsmouth.uk.ibm.com (d06relay02.portsmouth.uk.ibm.com [9.166.84.148]) by d12lmsgate-3.de.ibm.com (1.0.0) with ESMTP id OAA186122 for ; Fri, 22 Dec 2000 14:54:06 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (ss5.bld.socks.ibm.com [9.14.4.70]) by d06relay02.portsmouth.uk.ibm.com (8.8.8m3/NCO v4.95) with ESMTP id NAA163628 for ; Fri, 22 Dec 2000 13:54:04 GMT Message-ID: <3A435CF9.4C8E3B43@usa.net> Date: Fri, 22 Dec 2000 14:54:01 +0100 From: "Alberto di Bene" Organization: Undisclosed X-Mailer: Mozilla 4.76 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re: SK1029 Mosfets References: <3A4240CF.FCAD2D6@usa.net> <006e01c06c00$78c8cfc0$20e3883e@default> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Martin Evans wrote: > Alberto- > MOS-N-FET, V-MOS, DC-DC Converter, 500V, 10A, 200W, equivalent > to 2SK694. > Regards, > Martin Evans GW3UCJ Martin, many thanks. Given their low price, they seem to be the ideal candidates for my first 136kHz TX, which will end up, I'm sure, in a big bang and a bad smelling smoke. But you have to start, somewhere.. 73 and all my best wishes to all the subscribers of this group of a Merry Christmas and a Happy New Millennium (which, contrary to what they tried to tell us, starts with next January 1st) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12879 invoked from network); 22 Dec 2000 11:15:39 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by 10.226.25.101 with SMTP; 22 Dec 2000 11:15:39 -0000 Received: (qmail 3265 invoked from network); 22 Dec 2000 10:31:20 -0000 Received: from magnus.plus.net.uk (HELO magnus.force9.net) (195.166.128.27) by mx.last.plus.net with SMTP; 22 Dec 2000 10:31:20 -0000 Received: (qmail 7851 invoked from network); 22 Dec 2000 10:02:53 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by magnus.plus.net.uk with SMTP; 22 Dec 2000 10:02:53 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149OoP-0002Gi-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 22 Dec 2000 09:48:29 +0000 Received: from fep03.swip.net ([130.244.199.131] helo=fep03-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149OoO-0002Gd-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Dec 2000 09:48:28 +0000 Received: from W98 ([212.151.110.6]) by fep03-svc.swip.net (InterMail vM.5.01.01.01 201-252-104) with SMTP id <20001222094821.MMRP29188.fep03-svc.swip.net@W98> for ; Fri, 22 Dec 2000 10:48:21 +0100 Message-ID: <000901c06bfc$2a06e740$066e97d4@W98.swipnet.se> From: "Christer Andersson" To: "RSGB LF Group" Subject: LF: List archive Date: Fri, 22 Dec 2000 10:46:42 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Would it be very complicated to make some sort of archive of this list? That would be great when searching for older messages. The information is just too valuable to not be stored anywhere. Other services (like egroups) work this way, both email and www message board. /sm6pxj From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24453 invoked from network); 22 Dec 2000 10:21:29 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by 10.226.25.101 with SMTP; 22 Dec 2000 10:21:29 -0000 Received: (qmail 3093 invoked from network); 22 Dec 2000 10:24:28 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 22 Dec 2000 10:24:28 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149P9z-0002Op-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 22 Dec 2000 10:10:47 +0000 Received: from cmailg3.svr.pol.co.uk ([195.92.195.173]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149P9x-0002Oj-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Dec 2000 10:10:45 +0000 Received: from modem-68.scissor-tailed-flycatcher.dialup.pol.co.uk ([62.137.212.68] helo=default) by cmailg3.svr.pol.co.uk with smtp (Exim 3.13 #0) id 149P9n-0003CI-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Dec 2000 10:10:36 +0000 Message-ID: <006e01c06c00$78c8cfc0$20e3883e@default> From: "Martin Evans" To: rsgb_lf_group@blacksheep.org References: <3A4240CF.FCAD2D6@usa.net> Subject: LF: Re: SK1029 Mosfets Date: Fri, 22 Dec 2000 09:15:33 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Alberto- MOS-N-FET, V-MOS, DC-DC Converter, 500V, 10A, 200W, equivalent to 2SK694. Regards, Martin Evans GW3UCJ Mollie's Loft Bookshop 96 High Street Clydach Swansea SA6 5LN Wales Tel +44 (0) 1792 842135 books@mollies.freeserve.co.uk ----- Original Message ----- From: "Alberto di Bene" To: "LF Mailing List" Sent: Thursday, December 21, 2000 5:41 PM Subject: LF: SK1029 Mosfets > Hi all, > I bought at a ham fair last week 4 x SK1029 mosfets, > due to their quite low cost. A hand-written piece of paper placed > near them stated that they were 500V, > 10A units. > > I have been unable to find on Internet the data sheet for this > component, manufactured by Toshiba. Does anybody have > a bit more info, ideally a data sheet ? TNX. > > Alberto, I2PHD > > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19884 invoked from network); 22 Dec 2000 10:19:07 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by excalibur.plus.net with SMTP; 22 Dec 2000 10:19:07 -0000 Received: (qmail 22860 invoked from network); 22 Dec 2000 10:13:55 -0000 Received: from magnet.plus.net.uk (HELO magnet.force9.net) (195.166.128.26) by mx.last.plus.net with SMTP; 22 Dec 2000 10:13:55 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 572 invoked from network); 22 Dec 2000 10:09:30 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by magnet.plus.net.uk with SMTP; 22 Dec 2000 10:09:30 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149OmF-0002GN-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 22 Dec 2000 09:46:15 +0000 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149OmE-0002GH-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Dec 2000 09:46:14 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id JAA01280; Fri, 22 Dec 2000 09:46:46 GMT X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (qmail 2714 invoked from network); 22 Dec 2000 10:41:02 -0000 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 22 Dec 2000 10:41:02 -0000 Received: by gauntlet.mail.dera.gov.uk; id KAA08378; Fri, 22 Dec 2000 10:35:05 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma007947; Fri, 22 Dec 00 10:33:46 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Fri, 22 Dec 2000 09:43:20 +0000 Received: by FRN-GOLD-1 with Internet Mail Service (5.0.1460.8) id ; Fri, 22 Dec 2000 09:27:52 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D74BF@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: VE1ZZ on NOW!! Date: Fri, 22 Dec 2000 09:27:50 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I saw something a few Hz above 136500 between 0000z and 0100z last night. In a 0.1 Hz bandwidth something was definitely visible with some on-off structure to it, but was keying too fast to make out any CW. It was too weak to copy in a higher bandwidth to match 2 or 3 second dots. Ironically, it looked as if it may have been strong enough to have been receivable with MS100, or more likely MS200, BPSK. Andy G4JNT > -----Original Message----- > From: Alan Melia [mailto:Alan.Melia@btinternet.com] > Sent: 2000-12-22 00:03 > To: rsgb_lf_group@blacksheep.org > Subject: LF: VE1ZZ on NOW!! > > > Hi all, posted by Jack to the DX Cluster this evening at > 2400z. "136.5 > 00 0030 01 103" > I take this to mean he is one 2400-0030z and 0100 to 0130z ..NOW!! > > While 2300z might be a convenient time for us, a look back > through the plots > shows that on good nights the peak signal strength of CFH was > rarely reached > before 2400z. I imagine that CFH will not now reappear until > after the New > Year. > > I also saw a signal slightly above 136.5 (+2 to +5Hz) pop > out of the noise > on 18th though I dont remember what time now. I was set up > for 3 sec dots so > would not have copied a 4 sec dash properly. The signal looked like > continuous carrier with some flutter and was at least 6dB > above the noise in > 0.3Hz, but I was using 750msecs time scale on spectrogram. I > put it down as > a distant Loran sideband. > > Good luck fellows > Cheers de Alan G3NYK > Alan.Melia@btinternet.com > > > -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10760 invoked from network); 22 Dec 2000 00:12:41 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 22 Dec 2000 00:12:41 -0000 Received: (qmail 22508 invoked from network); 22 Dec 2000 00:15:48 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 22 Dec 2000 00:15:48 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149Fm1-0008AY-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 22 Dec 2000 00:09:25 +0000 Received: from [194.73.73.138] (helo=ruthenium) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149Flz-0008AT-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Dec 2000 00:09:24 +0000 Received: from [213.122.204.221] (helo=default) by ruthenium with smtp (Exim 3.03 #83) id 149Fln-0006AF-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Dec 2000 00:09:12 +0000 Message-ID: <000d01c06baa$aeedb440$ddcc7ad5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: VE1ZZ on NOW!! Date: Fri, 22 Dec 2000 00:03:17 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all, posted by Jack to the DX Cluster this evening at 2400z. "136.5 00 0030 01 103" I take this to mean he is one 2400-0030z and 0100 to 0130z ..NOW!! While 2300z might be a convenient time for us, a look back through the plots shows that on good nights the peak signal strength of CFH was rarely reached before 2400z. I imagine that CFH will not now reappear until after the New Year. I also saw a signal slightly above 136.5 (+2 to +5Hz) pop out of the noise on 18th though I dont remember what time now. I was set up for 3 sec dots so would not have copied a 4 sec dash properly. The signal looked like continuous carrier with some flutter and was at least 6dB above the noise in 0.3Hz, but I was using 750msecs time scale on spectrogram. I put it down as a distant Loran sideband. Good luck fellows Cheers de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18896 invoked from network); 21 Dec 2000 22:52:07 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 21 Dec 2000 22:52:07 -0000 Received: (qmail 23720 invoked from network); 21 Dec 2000 22:54:34 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Dec 2000 22:54:34 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149EUw-0007fW-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 22:47:42 +0000 Received: from imo-d04.mx.aol.com ([205.188.157.36]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149EUu-0007fP-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 22:47:40 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from WarmSpgs@aol.com by imo-d04.mx.aol.com (mail_out_v28.35.) id l.d8.2f249 (9651) for ; Thu, 21 Dec 2000 17:45:44 -0500 (EST) From: WarmSpgs@aol.com Message-ID: Date: Thu, 21 Dec 2000 17:45:44 EST Subject: Re: LF: Hamble School of Yachting.htm To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: AOL 4.0 for Windows 95 sub 120 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In a message dated 12/21/00 2:23:52 PM Eastern Standard Time, m5cix@cwcom.net writes: << I am surprised that anyone had problems with Netscape. >> I'm not. As a webmaster who tries to keep our pages as widely readable as possible, I've been trying to write them in strict accord with HTML 3.2 and 4 standards, but I keep finding Netscape to be less and less compliant with those standards. My first thought when the AOL e-mail client presented me with the raw HMTL code, and then when Martin wrote that the mail went everywhere except where it was intended, was that a worm may be at work in the ActiveX control. This still may be true, or it may simply be an incompatibility with Netscape. Either way, Martin, you may want to have someone with good antivirus tools and extensive knowledge of Netscape to check it out. As for this reflector, I encourage the powers that be to implement a filter to remove HTML code from posts. We had to do that on the LWCA Longwave Message Board, particularly because it's open to everyone. It has saved a lot of headaches. 73, John From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19343 invoked from network); 21 Dec 2000 21:32:22 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 21 Dec 2000 21:32:22 -0000 Received: (qmail 20595 invoked from network); 21 Dec 2000 21:34:48 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Dec 2000 21:34:48 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149DFn-0007KO-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 21:27:59 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149DFj-0007KH-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 21:27:55 +0000 Received: from central.zetnet.co.uk (central.zetnet.co.uk [194.247.47.20]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id VAA05149 for ; Thu, 21 Dec 2000 21:27:48 GMT X-ZSender: g3ldo@zetnet.co.uk Message-ID: <2000122121412468199@zetnet.co.uk> Date: Thu, 21 Dec 2000 21:41:24 GMT To: rsgb_lf_group@blacksheep.org From: "Peter Dodd" X-Mailer: ZIMACS Version 1.20c 10000836 Subject: Re: LF: VE1ZZ Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Hi John > I have been trying to call Jack via > landline. Not home . I will be coordinating with him to provide you in > Eu with a early warning of his schedule . That would be great. I have also tried calling by phone but no answer. Even when he is at home the phone sometimes does not get answered because it appears to be some way from the shack. If you do get through ask him if he could start transmitting earlier at, say, 2300UTC. CFH off again tonight. HF band conditions now poor. QRN on 136kHz up to summer levels -- Regards, Peter, G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15993 invoked from network); 21 Dec 2000 19:57:25 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 21 Dec 2000 19:57:25 -0000 Received: (qmail 81 invoked from network); 21 Dec 2000 19:52:21 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Dec 2000 19:52:21 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149BZl-0006iD-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 19:40:29 +0000 Received: from indyweb.cgocable.ca ([205.151.69.200]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149BZj-0006i8-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 19:40:28 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from 220-132.lr.cgocable.ca (220-132.lr.cgocable.ca [24.226.220.132]) by indyweb.cgocable.ca (8.9.3 (MessagingDirect 1.0.4)/8.9.3) with SMTP id OAA11457405; Thu, 21 Dec 2000 14:40:14 -0500 (EST) Message-ID: <200012211940.OAA11457405@indyweb.cgocable.ca> X-Sender: bill1@cgocable.ca X-Mailer: Windows Eudora Light Version 1.5.2 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Date: Thu, 21 Dec 2000 14:38:48 -0500 To: rsgb_lf_group@blacksheep.org, bpsk@qth.net From: "Bill de Carle" Subject: LF: AFRICAM V2.1 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Greetings to everyone. Just uploaded latest AFRICAM (V2.1) to my web page at: http://cafe.rapidus.net/bill1/bbs.htm AFRICAM 2.1 has some improvements, some bug fixes and some additions. Under poor SNR conditions it is difficult to accurately measure the phase (frequency) of a received signal. The older versions used to measure frequency by measuring the phase in the middle of each bit time relative to a reference frequency (fcar) - then by noting how much the phase drifts upwards or downwards over time, the offset relative to that reference frequency was obtained. That technique works fine when the actual frequency being received is very close to the entered fcar value (nominally 800.0 Hz) - but it becomes increasingly difficult to get a good reading in noise as the received frequency moves away from its nominal value. That's because the energy response is way down the skirt of the Integrate & Dump filter except right at the nominal frequency. The latest version takes this into account by measuring the incoming frequency at a reference frequency equal to the best guess we have obtained so far. As the reference freq gets closer to the actual received frequency the measure- ment improves. This means you will likely have more success using the AUTOFREQ system than before. If you can hear the signal at all, I recommend you try it. If there is no audio trace of the signal you'll probably still be better off to set the rig right on frequency as best you can and keep your fingers crossed, hi! The SLOG command line parameter wasn't working properly. It works now. In case you don't know what that did, it writes the measured phase value at the center of each received bit to disk - format is an integer, which represents the measured angle in 1/10 degrees 0..3599. That data can subsequently be plotted using PLOTPHAS.COM - you can see how noisy the phase determinations are, which gives a good idea of what bit error rate to expect. The SHOWPH command (shows reference phase (modulo 180) on screen - now averages over each frame - tends to be less jittery. Probably more useful for the laser ranging folks. Added support for ET3 - that's a mode similar to the other ET modes but more robust in noise - it uses a 32-bit frame. Each symbol differs from all others in the set in at least 13 ways. Added support for non-differential encoding for all the ET modes. This is still experimental - you shouldn't use it unless you know the transmitter is sending non-differentially encoded BPSK. The advantage is it's more robust in QRM - disadvantage is there is a 2-way ambiguity in the reference phase value which at this point has to be resolved by trying both possibilities (the FLIP button does that). At present the only way to generate non-differential ET is with a keyer. I've upgraded MATIC to MATIC V4.6 - it's in the KEYER.ZIP file on my web page if anyone wants to try it. It now supports the new ET3 codeset with both both differential and non-differential encoding options available. I am currently transmitting a short test message on 6776.8 Khz. That's a license-free band available in Canada. It's just below the 40-Metre ham band, so propagation ought to be similar. The parameters are: ET3, diff, MS10, run-length 31. ERP is less than 5 milliwatts! If you want to try copying the message, invoke V2.1 of AFRICAM with "SB ET3 MS10". If you can hear the signal, set TC=10, TCF=5 and set AUTOFREQ ON. If you can't hear the signal, use the default settings. Would appreciate signal reports, Bill VE2IQ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16281 invoked from network); 21 Dec 2000 19:29:20 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 21 Dec 2000 19:29:20 -0000 Received: (qmail 12189 invoked from network); 21 Dec 2000 19:24:17 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 21 Dec 2000 19:24:17 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149BCM-0006co-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 19:16:18 +0000 Received: from email.cwcom.net ([195.44.0.150] helo=cwcom.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149BCL-0006cj-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 19:16:17 +0000 Received: from computer ([195.44.16.152]) by cwcom.net with Microsoft SMTPSVC(5.5.1877.537.53); Thu, 21 Dec 2000 19:17:39 +0000 Message-ID: <001d01c06b82$9c766820$98102cc3@computer> From: "Martin M5CIX" To: rsgb_lf_group@blacksheep.org References: <15173083.977395129846.JavaMail.imail@almond.excite.com> <001101c06b68$f5623a00$772a78d5@dave> Subject: Re: LF: Hamble School of Yachting.htm Date: Thu, 21 Dec 2000 19:17:02 -0000 Organization: M5CIX / G8CIX MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear All Apologies again for the inadvertent post. The file contained a html file with a flash projector file. It is now residing in its proper location www.fastnet2001.co.uk where it was meant to go in the first place. I am surprised that anyone had problems with Netscape. Anyone for 136 maritime mobile? Regards Martin M5CIX > From Dave G3YMC > > John Sexton wrote: > >This was a .htm file which killed Netscape stone dead. > >Better not to post .htm files. > >John, G4CNN > > Yes, I don't know what was in that file, but it corrupted my Netscape .ini files > as well (even when I opened it with Outlook Express) and I have had to set them > all up again (first time in two years!!). There was also an active X script in > the file, which with my settings in OE it told me was unsafe and refused to run > it, however it now seems there was an HTML bit which opened in Netscape (my > default HTML reader). I THINK nothing else has has been damaged... > > Motto - send plain text mails on the reflector unless you really do need to send > in HTML. > > Apologies accepted Martin, I know you didn't mean to send it on here anyway! > > Happy Christmas.. > > Cheers Dave G3YMC > sergeantd@compuserve.com > dsergeant@iee.org > http://ourworld.compuserve.com/homepages/sergeantd > > > > > > > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6558 invoked from network); 21 Dec 2000 18:52:16 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 21 Dec 2000 18:52:16 -0000 Received: (qmail 3087 invoked from network); 21 Dec 2000 18:47:11 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Dec 2000 18:47:11 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149Ad3-0006PN-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 18:39:49 +0000 Received: from galahad.joust.net ([63.108.136.2] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149Ad2-0006PF-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 18:39:48 +0000 Received: from hifidelity.com (portal-138-047.joust.net [63.108.138.47]) by galahad.joust.net (8.11.0/8.11.0) with ESMTP id eBLIdWF14167 for ; Thu, 21 Dec 2000 13:39:32 -0500 (EST) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A40FD94.A0467411@hifidelity.com> Date: Wed, 20 Dec 2000 13:42:28 -0500 From: "Steve Dove" X-Mailer: Mozilla 4.7 [en]C-CCK-MCD (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: VE1ZZ signals References: <2654.200012211237@gemini> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Greetings, Congratulations Peter and Jack! Well, the King of Topband now rules 136, too. Last night Jack was the loudest amateur signal (out of a total of, um, five) that I've seen so far here in central Pennsylvania. When CFH wakes up again I should be able to give a reasonable idea of how far down 'the beacon' is on 'the beacon'. 73, Steve W3EEE James Moritz wrote: > Dear LF group, > > Congratulations to Jack and Peter on last night's reception of > VE1ZZ's signals. > > Funnily enough, I was using DL4YHF's excellent Spectrum Lab > software to record spectrograms of 136.5kHz last night - but > unfortunately only after 0100! Oh, well. There was actually a trace > around 0300 or 0400, on about the right frequency, drifting a few > hertz low, but it had nothing to identify it as an amateur station. > > If G3LDO's info about VE1ZZ's station is correct, Jack's ERP is > about 50W (30W radiated power). This is pretty spectacular - not > far below the ERP obtained during the Puckeridge "high power" > operation. It would put VE1ZZ only about 30dB down on the CFH > signal. Since the SNR on CFH in typical CW bandwidths often > exceeds 30dB during the course of a night, audible copy should be > quite easy, provided one of Jack's transmissions coincides with > good propagation. > > Of course, with the European 1W ERP limit, both regulatory and > practical, 2-way communication might be a way off yet, but it's > getting closer... > > After tomorrow, I won't have access to E-mail due to the holidays > until about January 2nd. in the mean time - > > A very Happy Christmas to all on the LF reflector, and best wishes > for 2001! > > Cheers, Jim Moritz > 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20696 invoked from network); 21 Dec 2000 18:29:39 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 21 Dec 2000 18:29:39 -0000 Received: (qmail 18819 invoked from network); 21 Dec 2000 18:32:44 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Dec 2000 18:32:44 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 149ANb-0006Ks-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 18:23:51 +0000 Received: from mta03-svc.ntlworld.com ([62.253.162.43]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 149ANa-0006Kn-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 18:23:51 +0000 Received: from oemcomputer ([62.255.37.9]) by mta03-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001221182343.PAOQ10171.mta03-svc.ntlworld.com@oemcomputer> for ; Thu, 21 Dec 2000 18:23:43 +0000 Message-ID: <000401c06b7a$f2ca4be0$0925ff3e@oemcomputer> From: "Paul & Vanessa" To: rsgb_lf_group@blacksheep.org References: <15173083.977395129846.JavaMail.imail@almond.excite.com> <001101c06b68$f5623a00$772a78d5@dave> Subject: Re: LF: Hamble School of Yachting.htm Date: Thu, 21 Dec 2000 18:21:55 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all, When I opened this with OE5.5 it automatically took me to a web site - not very clever, but no virus indications or ActiveX warnings. Also no apparent damage to Netscape installed on same machine but inactive at the time. All manner of ills seem able to lurk within html messages - is there a case for the reflector to filter these out and only forward plain text messages? Anyone wanting to make available info only transmissible by html could post a notification of URL where it could be downloaded, or offer to send it individually to those requiring it (as is done already by our notable and well-mannered contributors with large files to pass on). This may seem a bit draconian, but I speak as someone who appreciates how easy it is for things to go awry - it took me three months and a note from G3YMC to discover that OE5.* defaults to html ! Regards de Paul G4MD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28846 invoked from network); 21 Dec 2000 17:55:21 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 21 Dec 2000 17:55:21 -0000 Received: (qmail 14480 invoked from network); 21 Dec 2000 17:57:48 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Dec 2000 17:57:48 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1499jU-00066i-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 17:42:24 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from d06lmsgate-3.uk.ibm.com ([195.212.29.3]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1499jQ-00066X-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 17:42:20 +0000 Received: from d06relay01.portsmouth.uk.ibm.com (d06relay01.portsmouth.uk.ibm.com [9.166.84.147]) by d06lmsgate-3.uk.ibm.com (1.0.0) with ESMTP id RAA75382 for ; Thu, 21 Dec 2000 17:33:12 GMT X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (ss5.bld.socks.ibm.com [9.14.4.70]) by d06relay01.portsmouth.uk.ibm.com (8.8.8m3/NCO v4.95) with ESMTP id RAA189276 for ; Thu, 21 Dec 2000 17:41:36 GMT Message-ID: <3A4240CF.FCAD2D6@usa.net> Date: Thu, 21 Dec 2000 18:41:35 +0100 From: "Alberto di Bene" Organization: Undisclosed X-Mailer: Mozilla 4.76 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: "LF Mailing List" Subject: LF: SK1029 Mosfets Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all, I bought at a ham fair last week 4 x SK1029 mosfets, due to their quite low cost. A hand-written piece of paper placed near them stated that they were 500V, > 10A units. I have been unable to find on Internet the data sheet for this component, manufactured by Toshiba. Does anybody have a bit more info, ideally a data sheet ? TNX. Alberto, I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20127 invoked from network); 21 Dec 2000 17:40:58 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 21 Dec 2000 17:40:58 -0000 Received: (qmail 981 invoked from network); 21 Dec 2000 17:44:03 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Dec 2000 17:44:03 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1499aI-00065g-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 17:32:54 +0000 Received: from jubilee.ns.sympatico.ca ([142.177.1.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1499aE-00065Z-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 17:32:50 +0000 Received: from ns.sympatico.ca ([142.177.210.18]) by jubilee.ns.sympatico.ca (Post.Office MTA v3.5.2 release 221 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Thu, 21 Dec 2000 13:32:17 -0400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A42B1AE.EFEB7678@ns.sympatico.ca> Date: Thu, 21 Dec 2000 17:43:11 -0800 From: "John Currie" X-Mailer: Mozilla 4.73 [en] (Win95; U) X-Accept-Language: en,pdf MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: VE1ZZ References: <2000122101422068199@zetnet.co.uk> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Peter. Congratulations. I have been trying to call Jack via landline. Not home . I will be coordinating with him to provide you in Eu with a early warning of his schedule . 73 es gl with 2-way John VE1ZJ Peter Dodd wrote: > Received QRSS signals from VE1ZZ at 0030UTC 21/12/00 on 136.502kHz. > > Readability 'O' degrading to 'M' later > > QRSS a bit fast with a dash speed of 4 seconds (approx) > > CFH off so relative conditions unknown > > -- > Regards, Peter, G3LDO > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15089 invoked from network); 21 Dec 2000 16:26:53 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 21 Dec 2000 16:26:53 -0000 Received: (qmail 6666 invoked from network); 21 Dec 2000 16:30:00 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 21 Dec 2000 16:30:00 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1498NE-0005jL-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 16:15:20 +0000 Received: from mta00.talk21.com ([62.172.192.40] helo=t21mta00-app.talk21.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1498N3-0005jG-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 16:15:09 +0000 Received: from dave ([213.120.42.119]) by t21mta00-app.talk21.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001221161314.KHWU10093.t21mta00-app.talk21.com@dave> for ; Thu, 21 Dec 2000 16:13:14 +0000 Message-ID: <001101c06b68$f5623a00$772a78d5@dave> From: "Dave Sergeant" To: rsgb_lf_group@blacksheep.org References: <15173083.977395129846.JavaMail.imail@almond.excite.com> Subject: Re: LF: Hamble School of Yachting.htm Date: Thu, 21 Dec 2000 11:14:17 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: >From Dave G3YMC John Sexton wrote: >This was a .htm file which killed Netscape stone dead. >Better not to post .htm files. >John, G4CNN Yes, I don't know what was in that file, but it corrupted my Netscape .ini files as well (even when I opened it with Outlook Express) and I have had to set them all up again (first time in two years!!). There was also an active X script in the file, which with my settings in OE it told me was unsafe and refused to run it, however it now seems there was an HTML bit which opened in Netscape (my default HTML reader). I THINK nothing else has has been damaged... Motto - send plain text mails on the reflector unless you really do need to send in HTML. Apologies accepted Martin, I know you didn't mean to send it on here anyway! Happy Christmas.. Cheers Dave G3YMC sergeantd@compuserve.com dsergeant@iee.org http://ourworld.compuserve.com/homepages/sergeantd From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15290 invoked from network); 21 Dec 2000 14:47:10 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 21 Dec 2000 14:47:10 -0000 Received: (qmail 22162 invoked from network); 21 Dec 2000 14:42:08 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Dec 2000 14:42:08 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1496oF-0005D2-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 14:35:07 +0000 Received: from mta03-svc.ntlworld.com ([62.253.162.43]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1496oE-0005Cx-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 14:35:06 +0000 Received: from oemcomputer ([213.104.96.164]) by mta03-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001221143458.MPDF10171.mta03-svc.ntlworld.com@oemcomputer> for ; Thu, 21 Dec 2000 14:34:58 +0000 Message-ID: <001601c06b5b$1b49ef00$a46068d5@oemcomputer> From: "mike.dennison" To: rsgb_lf_group@blacksheep.org Subject: LF: EU to NA Frequencies Date: Thu, 21 Dec 2000 14:34:15 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: As many of you know, I have a page on my web site listing the frequencies suggested for individual Eu stations transmitting to NA, taking into account the need to separate stations, and to avoid Loran. The sub-band used is from 135.700 to 135.770kHz, but this is now occupied by the Greek RTTY Tx (SXV). As suggested by someone else, I propose moving this slot up 200Hz to 135.900-135.970kHz. I have suggested new precise frequencies to avoid the Loran lines in this area. This has involved nudging a few frequencies by one or two Hertz. This is done in the spirit of helping people to avoid clashes, and if you want to ignore the suggested frequencies, then please do so. It would help others, though, if you are able to let me know what frequency you prefer. The published list should also help anyone listening in NA. The full details are at http://www.lf.thersgb.net/transatlantic.htm 73 Mike, G3XDV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21979 invoked from network); 21 Dec 2000 14:39:18 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 21 Dec 2000 14:39:18 -0000 Received: (qmail 22424 invoked from network); 21 Dec 2000 14:42:23 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Dec 2000 14:42:23 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1496nB-0005Cs-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 14:34:01 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1496n7-0005Cn-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 14:33:57 +0000 Received: from central.zetnet.co.uk (central.zetnet.co.uk [194.247.47.20]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id OAA29480 for ; Thu, 21 Dec 2000 14:33:51 GMT X-ZSender: g3ldo@zetnet.co.uk Message-ID: <2000122114464468199@zetnet.co.uk> Date: Thu, 21 Dec 2000 14:46:44 GMT To: rsgb_lf_group@blacksheep.org From: "Peter Dodd" X-Mailer: ZIMACS Version 1.20c 10000836 Subject: Re: LF: VE1ZZ signals Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Jim Moritz said: > Funnily enough, I was using DL4YHF's excellent Spectrum Lab > software to record spectrograms of 136.5kHz last night - but > unfortunately only after 0100! Oh, well. In fact VE1ZZ transmitted until 0130. It all started like this. I was monitoring (off and on) the frequencies between 136.4 and 136.6kHz and saw a fast CW signal, just below 136.5kHz at 2300UTC. I called QRZ but got no response. I then phoned up Jack, VE1ZZ and asked if it was him. No it wasn't. Then what time would he be transmitting? Well he usually transmits around 0100 to 0130, 0200 to 0230 etc. Well could he transmit now - I am looking at the frequency but I don't know what conditions are like because CFH is off the air Well no - he is just going out to take his XYL to a card party but he will be back at 0030 and he would transmit then. At 0030 a signal appears - bang on time and frequency (well 2Hz hi!) It is readability 'O' sending rather fast QRSS, fortunately clear of Loran lines. I was using Spectran in the verticlal mode at low resolution so that I could monitor a wide range of frequencies. I switched to horizontal mode at a higher resolution but the signal readability did not improve - in fact it got worse. I then phoned Jack and passed the report. He asked me how long I would be monitoring and I said until 0115UTC. In fact I stayed until 0130 when the transmissions ceased. Brief details of VE1ZZ's station are as follows: The antenna comprises a 900ft length of wire strung out over three masts 150ft, 104ft and 50ft high. It is loaded and fed at the end furthest away from the shack via a length of coax feeder. The valve (tube) transmitter with a plate input of 4kW, giving an output around 2.5kW (10 to 11 amps antenna current). I will call Jack tonight and ask him if he could transmit earlier, say 2300UTC. I think that way he will get a few more customers! He wont be listening for a while yet. His QTH is a computer free zone so we (probably John, VE1ZJ) will have to work on it. The signal level last night was 15 to 20dB below audibility (and that was with 25w erp) although the QRN was high. I will e-mail later as I get more info. -- Regards, Peter, G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 80 invoked from network); 21 Dec 2000 12:50:27 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 21 Dec 2000 12:50:27 -0000 Received: (qmail 27815 invoked from network); 21 Dec 2000 12:45:25 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Dec 2000 12:45:25 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1494z4-0004cR-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 12:38:10 +0000 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1494z2-0004cM-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 12:38:09 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.200.44] (helo=gemini) by hestia.herts.ac.uk with esmtp (Exim 3.16 #4) id 1494wJ-0003Nu-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 12:35:19 +0000 Message-ID: <2654.200012211237@gemini> From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Thu, 21 Dec 2000 12:41:18 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: VE1ZZ signals X-Mailer: Pegasus Mail for Win32 (v3.11) Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF group, Congratulations to Jack and Peter on last night's reception of VE1ZZ's signals. Funnily enough, I was using DL4YHF's excellent Spectrum Lab software to record spectrograms of 136.5kHz last night - but unfortunately only after 0100! Oh, well. There was actually a trace around 0300 or 0400, on about the right frequency, drifting a few hertz low, but it had nothing to identify it as an amateur station. If G3LDO's info about VE1ZZ's station is correct, Jack's ERP is about 50W (30W radiated power). This is pretty spectacular - not far below the ERP obtained during the Puckeridge "high power" operation. It would put VE1ZZ only about 30dB down on the CFH signal. Since the SNR on CFH in typical CW bandwidths often exceeds 30dB during the course of a night, audible copy should be quite easy, provided one of Jack's transmissions coincides with good propagation. Of course, with the European 1W ERP limit, both regulatory and practical, 2-way communication might be a way off yet, but it's getting closer... After tomorrow, I won't have access to E-mail due to the holidays until about January 2nd. in the mean time - A very Happy Christmas to all on the LF reflector, and best wishes for 2001! Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24451 invoked from network); 21 Dec 2000 12:45:40 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 21 Dec 2000 12:45:40 -0000 Received: (qmail 23827 invoked from network); 21 Dec 2000 12:40:38 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Dec 2000 12:40:38 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1494ub-0004bu-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 12:33:33 +0000 Received: from [195.47.110.226] (helo=dell1.cz.gmc.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1494ua-0004bn-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 12:33:32 +0000 Received: from p (p.maly.cz.gmc.net [192.168.1.22]) by dell1.cz.gmc.net with SMTP (Microsoft Exchange Internet Mail Service Version 5.5.2650.21) id YZSJ6D05; Thu, 21 Dec 2000 13:33:05 +0100 Message-ID: <00c201c06b49$e9456e00$1601a8c0@maly.cz.gmc.net> From: "Petr Maly" To: rsgb_lf_group@blacksheep.org References: <000101c06b40$4686eb20$0aa9883e@lvm> Subject: LF: Re: Re. VE1ZZ on 136 Date: Thu, 21 Dec 2000 13:31:14 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2014.211 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Also, congrats to both. 2 -way QSO: it is just a matter of convincing VE1ZZ to use computer for Visual-CW reception, isn't it. Or do we believe that we can manage cross-atlantic QSO on normal speed CW? 73 Petr OK1FIG ----- Original Message ----- From: LAWRENCE MAYHEAD To: rsgb lf group Sent: Thursday, December 21, 2000 12:21 PM Subject: LF: Re. VE1ZZ on 136 > Well done Peter and Jack, as Mike says just got to get together now for > a 2 > way. Merry Christmas to all. 73s Laurie. > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21275 invoked from network); 21 Dec 2000 12:42:51 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 21 Dec 2000 12:42:51 -0000 Received: (qmail 20215 invoked from network); 21 Dec 2000 12:37:49 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 21 Dec 2000 12:37:49 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1494ql-0004az-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 12:29:35 +0000 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1494qi-0004au-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 12:29:32 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail.cc.kuleuven.ac.be (8.9.3/8.9.0) with SMTP id NAA447518 for ; Thu, 21 Dec 2000 13:29:24 +0100 Message-ID: <3.0.1.16.20001221142112.2def97da@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Thu, 21 Dec 2000 14:21:12 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: VE1ZZ In-reply-to: <2000122101422068199@zetnet.co.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Congrats to Peter and Jack. Regarding transatlantic tests : based on the CFH plots there seem to be 2 periods with the best chance on enhanced propagation, one arround 00-02 UTC and and arround 05-07 UTC. Is Jack also transmitting during this last period ? I will look for hime during the coming nights. 73, Rik At 01:42 21/12/00 GMT, you wrote: >Received QRSS signals from VE1ZZ at 0030UTC 21/12/00 on 136.502kHz. > >Readability 'O' degrading to 'M' later > >QRSS a bit fast with a dash speed of 4 seconds (approx) > >CFH off so relative conditions unknown > > >-- >Regards, Peter, G3LDO > > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24368 invoked from network); 21 Dec 2000 11:23:49 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 21 Dec 2000 11:23:49 -0000 Received: (qmail 21925 invoked from network); 21 Dec 2000 11:26:16 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 21 Dec 2000 11:26:16 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1493ke-0004CX-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 11:19:12 +0000 Received: from mail12.svr.pol.co.uk ([195.92.193.215]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1493kV-0004CS-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 11:19:03 +0000 Received: from modem-10.edain.dialup.pol.co.uk ([62.136.169.10] helo=lvm) by mail12.svr.pol.co.uk with smtp (Exim 3.13 #0) id 1493kN-0002aI-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 11:18:56 +0000 Message-ID: <000101c06b40$4686eb20$0aa9883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. VE1ZZ on 136 Date: Thu, 21 Dec 2000 11:21:44 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Well done Peter and Jack, as Mike says just got to get together now for a 2 way. Merry Christmas to all. 73s Laurie. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3884 invoked from network); 21 Dec 2000 10:44:27 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 21 Dec 2000 10:44:27 -0000 Received: (qmail 10115 invoked from network); 21 Dec 2000 10:46:54 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Dec 2000 10:46:54 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14938I-0003xk-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 10:39:34 +0000 Received: from fortune-rwcmta.excite.com ([198.3.99.203] helo=fortune.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14938H-0003xe-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 10:39:33 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by fortune.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001221103849.FJDY9490.fortune.excite.com@almond.excite.com> for ; Thu, 21 Dec 2000 02:38:49 -0800 Message-ID: <15173083.977395129846.JavaMail.imail@almond.excite.com> Date: Thu, 21 Dec 2000 02:38:44 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Hamble School of Yachting.htm MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 62.253.64.5 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Rik, This was a .htm file which killed Netscape stone dead. Better not to post .htm files. John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 555 invoked from network); 21 Dec 2000 10:41:51 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 21 Dec 2000 10:41:51 -0000 Received: (qmail 6822 invoked from network); 21 Dec 2000 10:44:18 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Dec 2000 10:44:18 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14933l-0003xB-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 10:34:53 +0000 Received: from cmailg2.svr.pol.co.uk ([195.92.195.172]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14933k-0003x6-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 10:34:52 +0000 Received: from modem-108.bicolor-pseudochromis.dialup.pol.co.uk ([62.136.231.108] helo=lsear.freeserve.co.uk) by cmailg2.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14933b-0000JD-00; Thu, 21 Dec 2000 10:34:44 +0000 Message-ID: <002501c06b39$323de940$6ce7883e@lsear.freeserve.co.uk> From: "Lionel Sear" To: rsgb_lf_group@blacksheep.org Cc: "Bernard Spencer" , kf4hey@hotmail.com Subject: LF: Re: Speeding up QRSS CW Date: Thu, 21 Dec 2000 10:31:00 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.2106.4 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: The recent correspondence on Slow-Audio is of interest to me as it would need techniques very close to those I have been using with the PC/soundcard combination to receive slow Morse. I am using FFT/inverse FFT filtering to filter signals in the 1000Hz region through selectable bandwidths from 30 down to 4 Hz. To speed up a signal 16 times I then transpose the signal down to one sixteenth of the frequency and then take an average of successive groups of 16 samples which restores the pitch back up to the original, and then stores this in a .WAV file. It is thus possible to record 1 wpm CW and play it back at 16 wpm and at the original pitch. Speed-up factors of X2 to X16 are available. This program is at an early stage but if anyone would like to have a play then download: http://www.lsear.freeserve.co.uk/qrss.zip The program runs under Windows95 and requires a modest PC with a soundcard. It is at an early stage but has been tested on 80m between myself and G3SMC, and also KF4HEY has some ongoing tests using simulation software. It works, but I cannot guarantee that it will outperform the skillful use of the waterfall display. However, it may be that under some conditions the ear may be better than the eye. One slight problem occurs with some selected frequencies where the audio blocks do not join up seamlessly and give a clicking on the audio. As far as slow audio goes, I wonder if it would be possible to record 2 kHz bandwidth speech into a .WAV file at 44100Hz and then alter the sampling frequency in the file header to 11025Hz. Playing this would result in the speech with a duration four times as long but in one quarter the bandwidth. The frequency band would span 1 to 500Hz, so this would need to be transposed up to 300-800Hz in order to go through an SSB filter. Reception could be by similar techniques to those used in QRSS.EXE referred to above but with a further transposition to restore the original pitch. With the SB16 card, it would be possible to play a .WAV file at 5513Hz though a 250Hz bandwidth but not all soundcards allow the choice of non standard frequencies. Sorry about the long email, but I think it worth mentioning that I was in the LF group at the start of things and became interested in the DSP aspect, indeed it was Andy Talbot's suite of PowerBasic programs that gave me a start. The DSP bit took me off at a tangent and I have spent the intervening time developing programs for Hellschrieber and MFSK. One development, SLOWFELD.EXE, where FFT bins are plotted as the individual pixels in a form of Hellschreiber running at 2 characters/minute, would I humbly suggest, be ideal for LF use, since it gives a bandwidth of 2Hz. Take a look at: http://www.lsear.freeserve.co.uk/slowfeld.zip Again it uses a PC/soundcard with Windows95 but it allows for the on/off keying of a simple Tx as well as outputting audio for SSB. Maybe it has been tried on LF but I have had no confirmation of this 73 Lionel G3PPT From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24418 invoked from network); 21 Dec 2000 10:41:05 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 21 Dec 2000 10:41:05 -0000 Received: (qmail 4710 invoked from network); 21 Dec 2000 10:44:11 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 21 Dec 2000 10:44:11 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14934B-0003xL-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 10:35:19 +0000 Received: from kuku-rwcmta.excite.com ([198.3.99.63] helo=kuku.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14934A-0003xG-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 10:35:19 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by kuku.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001221103506.EYOF11766.kuku.excite.com@almond.excite.com> for ; Thu, 21 Dec 2000 02:35:06 -0800 Message-ID: <29710157.977394906380.JavaMail.imail@almond.excite.com> Date: Thu, 21 Dec 2000 02:34:48 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re: VE1ZZ MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 62.253.64.5 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Congrats to Jack for doing the hard bit and to Peter for staying up late. For those guys trying to make the 2-way QSO, I list below the Loran lines around 136.5: Lessay/Sylt chain 136.48789 136.49153 136.49532 136.49820 136.50275 136.50487 136.51018 136.51153 I see all but one of these lines. The line at 136.51018 is missing. For the other side of the water: Canadian East Coast Caribou, Nantucket, Cape Race, Fox Harbor Newfoundland East Coast Comfort Cove, Cape Race, Fox Harbor 136.48398 Canadian East Coast 136.48556 Newfoundland East Coast 136.49241 Canadian East Coast 136.49243 Newfoundland East Coast 136.49931 Newfoundland East Coast 136.50084 Canadian East Coast 136.50619 Newfoundland East Coast 136.50927 Canadian East Coast 73, Best of luck with this attempt and a Merry Christmas to one and all. John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20339 invoked from network); 21 Dec 2000 10:15:19 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 21 Dec 2000 10:15:19 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 9348 invoked from network); 21 Dec 2000 10:18:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 21 Dec 2000 10:18:26 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1492fR-0003p2-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 10:09:45 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from finch-post-10.mail.demon.net ([194.217.242.38]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1492fP-0003ox-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 10:09:43 +0000 Received: from telemetry.demon.co.uk ([194.222.19.114]) by finch-post-10.mail.demon.net with smtp (Exim 2.12 #1) id 1492fF-000N5F-0A for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 10:09:33 +0000 Message-ID: Date: Thu, 21 Dec 2000 09:57:01 +0000 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: Re: LF: VE1ZZ In-reply-to: <2000122101422068199@zetnet.co.uk> MIME-Version: 1.0 X-Mailer: Turnpike Version 3.03a Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Excellent stuff Peter and congratulations. Would be interesting to find out from Jack how much power he really is running. Do you think he might be audible on 'real' CW? (Computers are banned in my shack). 73, Tom G3OLB In message <2000122101422068199@zetnet.co.uk>, Peter Dodd writes >Received QRSS signals from VE1ZZ at 0030UTC 21/12/00 on 136.502kHz. > >Readability 'O' degrading to 'M' later > >QRSS a bit fast with a dash speed of 4 seconds (approx) > >CFH off so relative conditions unknown > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29956 invoked from network); 21 Dec 2000 09:05:28 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 21 Dec 2000 09:05:28 -0000 Received: (qmail 21931 invoked from network); 21 Dec 2000 09:07:55 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Dec 2000 09:07:55 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1491be-0003XT-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 09:01:46 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1491bd-0003XN-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 09:01:45 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id JAA22157; Thu, 21 Dec 2000 09:02:17 GMT Received: (qmail 8088 invoked from network); 21 Dec 2000 09:56:36 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 21 Dec 2000 09:56:36 -0000 Received: by gauntlet.mail.dera.gov.uk; id JAA15399; Thu, 21 Dec 2000 09:50:44 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma015353; Thu, 21 Dec 00 09:50:29 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Thu, 21 Dec 2000 09:03:19 +0000 Received: by FRN-GOLD-1 with Internet Mail Service (5.0.1460.8) id ; Thu, 21 Dec 2000 09:01:21 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D74B0@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: Hell tests Date: Thu, 21 Dec 2000 09:01:20 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Last night was a 40Hz wide signal centred on 137770.0. Two different fonts appeared throughout the evening, the simple 8x5 one initially then the 10x8 font. Power was up as the antena has dried out and I tried pushing the amp to nearly 700 Watts - no trouble with a low duty cycle signal like this but about the limit for IRF840 devices, the heatsink starts to get warm at 100% duty cycle. Andy G4JNT > -----Original Message----- > From: Alan Melia [mailto:Alan.Melia@btinternet.com] > Sent: 2000-12-20 19:06 > To: rsgb_lf_group@blacksheep.org > Subject: LF: Hell tests > > > Hi all, I think Andy must have changed the format again as > the Hell tonight > was clearly visible on FFTDSP4 running in low resolution > mode, which is 4Hz > I believe. The character height looked to be about 20Hz and > the waterfall > was running at 1 line per second. > > Cheers de Alan G3NYK JO02PB > Alan.Melia@btinternet.com > > > > -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6163 invoked from network); 21 Dec 2000 09:04:28 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 21 Dec 2000 09:04:28 -0000 Received: (qmail 12326 invoked from network); 21 Dec 2000 08:59:25 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Dec 2000 08:59:25 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1491Tm-0003SP-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 08:53:38 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1491Tl-0003SK-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 08:53:37 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id IAA27696; Thu, 21 Dec 2000 08:54:08 GMT Received: (qmail 6880 invoked from network); 21 Dec 2000 09:48:27 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 21 Dec 2000 09:48:27 -0000 Received: by gauntlet.mail.dera.gov.uk; id JAA14002; Thu, 21 Dec 2000 09:42:35 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma013962; Thu, 21 Dec 00 09:42:21 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Thu, 21 Dec 2000 08:55:11 +0000 Received: by FRN-GOLD-1 with Internet Mail Service (5.0.1460.8) id ; Thu, 21 Dec 2000 08:53:13 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D74AF@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: Decca guard circuit info Date: Thu, 21 Dec 2000 08:53:10 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Jim - Can I have a copy in .DXF format please. If after this evening, can you please send it to my home EMail address G4JNT@AOL.COM as this account won't be available over the solstice holiday period. Andy G4JNT > -----Original Message----- > From: James Moritz [mailto:j.r.moritz@herts.ac.uk] > Sent: 2000-12-20 18:49 > To: rsgb_lf_group@blacksheep.org > Subject: LF: Decca guard circuit info > > > Dear LF group, > > Seems that quite a few people are interested in the Decca "guard" > circuit The original circuit diagrams are hierarchical and take up > several pages, and most of the detail is not much use if you don't > have the whole unit. So I have drawn up another simplified circuit > diagram, which includes some details not in the "handbook". I can > send this out as a .jpg (not brilliant image quality), .doc > for MS word > '97, or .dxf (Autocad format) file. Let me know which you would like. > > If someone would like to post it on their web page, please do. I > hope there are no errors; please let me know if you spot one, and I > will correct it. > > Cheers, Jim Moritz > 73 de M0BMU > -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24161 invoked from network); 21 Dec 2000 08:51:32 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 21 Dec 2000 08:51:32 -0000 Received: (qmail 28536 invoked from network); 21 Dec 2000 08:46:29 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Dec 2000 08:46:29 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1491ES-0003NH-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 08:37:48 +0000 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1491EJ-0003NC-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 08:37:40 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail.cc.kuleuven.ac.be (8.9.3/8.9.0) with SMTP id JAA767222 for ; Thu, 21 Dec 2000 09:37:28 +0100 Message-ID: <3.0.1.16.20001221102917.2caf2dc0@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Thu, 21 Dec 2000 10:29:17 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: Hamble School of Yachting.htm In-reply-to: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I would appreciate it if we could keep the LF reflector free of 'commercials', especially if they have no connection at all with LF. 73, Rik ON7YD At 18:26 20/12/00 -0000, you wrote: >Hamble School of Yachting > > >---------------------------------------------------------------------------- >---- > FASTNET > 2001 > > Just do it! > > www.Hamble.co.uk > > > Hamble School of Yachting has been running Fastnet packages since 1989 >during which time hundreds people from all walks of life have been around >the rock with us. During this time we have learnt how to run successful >crews who have often continued to race together. The principle features of >our package are: > etc... From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23579 invoked from network); 21 Dec 2000 08:50:49 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 21 Dec 2000 08:50:49 -0000 Received: (qmail 3511 invoked from network); 21 Dec 2000 08:45:48 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 21 Dec 2000 08:45:48 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1491Dp-0003NA-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 08:37:09 +0000 Received: from email.cwcom.net ([195.44.0.152] helo=cwcom.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1491Do-0003N5-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 08:37:08 +0000 Received: from computer ([195.44.202.213]) by cwcom.net with Microsoft SMTPSVC(5.5.1877.537.53); Thu, 21 Dec 2000 08:37:00 +0000 Message-ID: <002c01c06b29$50436880$d5ca2cc3@computer> From: "Martin M5CIX" To: rsgb_lf_group@blacksheep.org References: Subject: LF: Re: Hamble School of Yachting.htm Date: Thu, 21 Dec 2000 08:37:43 -0000 Organization: M5CIX / G8CIX MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit Hamble School of Yachting
Appologies for this post that was made in error and seems to have gone to the wrong email group.
 
Martin M5cix
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5257 invoked from network); 21 Dec 2000 08:24:16 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 21 Dec 2000 08:24:16 -0000 Received: (qmail 15949 invoked from network); 21 Dec 2000 08:27:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 21 Dec 2000 08:27:23 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1490vQ-0003Iv-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 08:18:08 +0000 Received: from mta05-svc.ntlworld.com ([62.253.162.45]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1490vM-0003Iq-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 08:18:04 +0000 Received: from oemcomputer ([213.104.97.137]) by mta05-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001221081757.JIWU18404.mta05-svc.ntlworld.com@oemcomputer> for ; Thu, 21 Dec 2000 08:17:57 +0000 Message-ID: <002e01c06b26$701dbbe0$896168d5@oemcomputer> From: "mike.dennison" To: rsgb_lf_group@blacksheep.org References: <2000122101422068199@zetnet.co.uk> Subject: LF: Re: VE1ZZ Date: Thu, 21 Dec 2000 08:17:16 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > Received QRSS signals from VE1ZZ at 0030UTC 21/12/00 on 136.502kHz. > Readability 'O' degrading to 'M' later > QRSS a bit fast with a dash speed of 4 seconds (approx) > CFH off so relative conditions unknown > Regards, Peter, G3LDO Congratulations, Peter (and Jack of course). As Basil Fawlty once said: "Now for the tricky bit" - the 2-way. 73 Mike, G3XDV (just getting back on the air after a very nasty flu bug). From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21409 invoked from network); 21 Dec 2000 01:51:20 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 21 Dec 2000 01:51:20 -0000 Received: (qmail 14638 invoked from network); 21 Dec 2000 01:54:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Dec 2000 01:54:26 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148upi-0001gJ-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 01:47:50 +0000 Received: from imo-r14.mx.aol.com ([152.163.225.68] helo=imo-r14.mail.aol.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148upf-0001gA-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 01:47:48 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from G0MRF@aol.com by imo-r14.mx.aol.com (mail_out_v28.35.) id l.16.675d7e8 (4564) for ; Wed, 20 Dec 2000 20:47:00 -0500 (EST) From: G0MRF@aol.com Message-ID: <16.675d7e8.2772bb14@aol.com> Date: Wed, 20 Dec 2000 20:47:00 EST Subject: Re: LF: VE1ZZ To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: AOL 5.0 for Windows sub 105 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In a message dated 12/21/00 1:35:00 AM GMT Standard Time, g3ldo@zetnet.co.uk writes: << Received QRSS signals from VE1ZZ at 0030UTC 21/12/00 on 136.502kHz. Readability 'O' degrading to 'M' later QRSS a bit fast with a dash speed of 4 seconds (approx) >> Congratulations Peter. Well deserved after all your hard work. A little co-ordination and communication have once again proved invaluable, just as you have said on so many occasions. Well done. David G0MRF From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4745 invoked from network); 21 Dec 2000 01:43:46 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 21 Dec 2000 01:43:46 -0000 Received: (qmail 11456 invoked from network); 21 Dec 2000 01:46:13 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Dec 2000 01:46:13 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148ugH-0001cS-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 01:38:05 +0000 Received: from imo-d10.mx.aol.com ([205.188.157.42]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148ugG-0001cJ-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 01:38:04 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from G0MRF@aol.com by imo-d10.mx.aol.com (mail_out_v28.35.) id l.7b.de1296b (3945) for ; Wed, 20 Dec 2000 20:37:22 -0500 (EST) From: G0MRF@aol.com Message-ID: <7b.de1296b.2772b8d2@aol.com> Date: Wed, 20 Dec 2000 20:37:22 EST Subject: Re: LF: VE1ZZ on 136 To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: AOL 5.0 for Windows sub 105 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In a message dated 12/20/00 8:08:17 PM GMT Standard Time, g3ldo@zetnet.co.uk writes: << Either way it still represents an erp of nearly 30watts. In which case we should be able to see Jack's signal when CFH is only 30dBs on the Alan scale >> It was certainly very strong when the '10 second dashes' were seen in September. Without the QRN on that particular night they would have been perfect 'O' copy. I note from John's comments a few days ago that in recent weeks the strength of the 128kHz station has been much stronger than the S5-6 recorded on 10/Sept. With a little luck, that should mean that if we know in advance that Jack is planning a beacon session, reception should be 'reasonably' straightforward. BTW Did anyone in VE monitor the recent transmission? Is Jack's new crystal on 136.500 or was he still using the VFO? A little trimming to avoid Loran QRM would increase the chances of success. 73 David 'MRF From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9442 invoked from network); 21 Dec 2000 01:41:04 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 21 Dec 2000 01:41:04 -0000 Received: (qmail 4295 invoked from network); 21 Dec 2000 01:36:02 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 21 Dec 2000 01:36:02 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148uXg-0001bE-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Dec 2000 01:29:12 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148uXf-0001b9-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Dec 2000 01:29:11 +0000 Received: from central.zetnet.co.uk (central.zetnet.co.uk [194.247.47.20]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id BAA02311 for ; Thu, 21 Dec 2000 01:29:04 GMT X-ZSender: g3ldo@zetnet.co.uk Message-ID: <2000122101422068199@zetnet.co.uk> Date: Thu, 21 Dec 2000 01:42:20 GMT To: rsgb_lf_group@blacksheep.org From: "Peter Dodd" X-Mailer: ZIMACS Version 1.20c 10000836 Subject: LF: VE1ZZ Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Received QRSS signals from VE1ZZ at 0030UTC 21/12/00 on 136.502kHz. Readability 'O' degrading to 'M' later QRSS a bit fast with a dash speed of 4 seconds (approx) CFH off so relative conditions unknown -- Regards, Peter, G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18242 invoked from network); 20 Dec 2000 23:44:26 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 20 Dec 2000 23:44:26 -0000 Received: (qmail 16303 invoked from network); 20 Dec 2000 23:47:31 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 20 Dec 2000 23:47:31 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148slH-000120-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Dec 2000 23:35:07 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148slG-00011v-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Dec 2000 23:35:06 +0000 Received: from central.zetnet.co.uk (central.zetnet.co.uk [194.247.47.20]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id XAA20673 for ; Wed, 20 Dec 2000 23:35:00 GMT X-ZSender: g3ldo@zetnet.co.uk Message-ID: <2000122023454168199@zetnet.co.uk> Date: Wed, 20 Dec 2000 23:45:41 GMT To: rsgb_lf_group@blacksheep.org From: "Peter Dodd" X-Mailer: ZIMACS Version 1.20c 10000836 Subject: LF: Re: LF, Who was it? Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Saw a fast CW signal on 136.49kHz (approx) at 2300UTC (20/12). It had a slight LF drift. I wasn't paying attention to it at the time and only saw the end bit. I transmitted a QRZ but no response. Who was it? -- Regards, Peter, G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12052 invoked from network); 20 Dec 2000 23:00:58 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 20 Dec 2000 23:00:58 -0000 Received: (qmail 16590 invoked from network); 20 Dec 2000 23:03:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 20 Dec 2000 23:03:26 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148s4s-0000pt-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Dec 2000 22:51:18 +0000 Received: from [194.73.73.138] (helo=ruthenium) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148s4q-0000po-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Dec 2000 22:51:16 +0000 Received: from [213.122.184.249] (helo=default) by ruthenium with smtp (Exim 3.03 #83) id 148s4i-0002tA-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Dec 2000 22:51:08 +0000 Message-ID: <000401c06ad6$a5792720$f9b87ad5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: Hell tests Date: Wed, 20 Dec 2000 19:06:27 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all, I think Andy must have changed the format again as the Hell tonight was clearly visible on FFTDSP4 running in low resolution mode, which is 4Hz I believe. The character height looked to be about 20Hz and the waterfall was running at 1 line per second. Cheers de Alan G3NYK JO02PB Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7208 invoked from network); 20 Dec 2000 20:06:37 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 20 Dec 2000 20:06:37 -0000 Received: (qmail 15279 invoked from network); 20 Dec 2000 20:09:04 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 20 Dec 2000 20:09:04 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148pQ6-00008f-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Dec 2000 20:01:02 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148pQ4-00007O-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Dec 2000 20:01:00 +0000 Received: from central.zetnet.co.uk (central.zetnet.co.uk [194.247.47.20]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id UAA24552 for ; Wed, 20 Dec 2000 20:00:47 GMT X-ZSender: g3ldo@zetnet.co.uk Message-ID: <2000122014562468199@zetnet.co.uk> Date: Wed, 20 Dec 2000 14:56:24 GMT To: rsgb_lf_group@blacksheep.org From: "Peter Dodd" X-Mailer: ZIMACS Version 1.20c 10000836 Subject: Re: LF: VE1ZZ on 136 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Tom, G3OLB said > 600 watts of RF puts about 4 amps into my long wire so if Jack VE1ZZ > gets 12 amps into his long wire, he must have 5 or 6 KW of RF! Well not necessarily. If Jack has got 900ft of wire in his antenna and we assume it is an inverted L with an average height of 80ft (27m) and a top of 820ft (270m); and we also assume that he has an extensive ground plane that he uses for 160m he could possibly get that sort of antenna current with 1500w. Either way it still represents an erp of nearly 30watts. In which case we should be able to see Jack's signal when CFH is only 30dBs on the Alan scale -- Regards, Peter, G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6571 invoked from network); 20 Dec 2000 18:50:50 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 20 Dec 2000 18:50:50 -0000 Received: (qmail 5416 invoked from network); 20 Dec 2000 18:53:19 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 20 Dec 2000 18:53:19 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148oFV-0008IA-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Dec 2000 18:46:01 +0000 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148oFU-0008I5-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Dec 2000 18:46:00 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.200.44] (helo=gemini) by hestia.herts.ac.uk with esmtp (Exim 3.16 #4) id 148oCk-0003hV-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Dec 2000 18:43:10 +0000 Message-ID: <18248.200012201845@gemini> From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Wed, 20 Dec 2000 18:49:07 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: Decca guard circuit info X-Mailer: Pegasus Mail for Win32 (v3.11) Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF group, Seems that quite a few people are interested in the Decca "guard" circuit The original circuit diagrams are hierarchical and take up several pages, and most of the detail is not much use if you don't have the whole unit. So I have drawn up another simplified circuit diagram, which includes some details not in the "handbook". I can send this out as a .jpg (not brilliant image quality), .doc for MS word '97, or .dxf (Autocad format) file. Let me know which you would like. If someone would like to post it on their web page, please do. I hope there are no errors; please let me know if you spot one, and I will correct it. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25517 invoked from network); 20 Dec 2000 17:56:41 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 20 Dec 2000 17:56:41 -0000 Received: (qmail 10110 invoked from network); 20 Dec 2000 17:59:08 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 20 Dec 2000 17:59:08 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148nKB-00080j-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Dec 2000 17:46:47 +0000 Received: from ab6qv.lm1.net ([209.221.203.114] helo=gw.ab6qv.ampr.org) by post.thorcom.com with smtp (Exim 3.16 #1) id 148nK6-00080d-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Dec 2000 17:46:42 +0000 X-BBS-Msg-Type: P Date: Wed, 20 Dec 00 09:46:19 -0800 Message-ID: <5495@gw.ab6qv.ampr.org> From: yo2is@gw.ab6qv.ampr.org To: rsgb_lf_group@blacksheep.org Subject: LF: Info... Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit From: YO2IS Hello, despite some aparent stagnation due to the lack of LF activity in my area am "pushing hard" towards my first real "DX" contact on VLF. Was happy to get the QSL from 7S6SAJ for a X-band VLF QSO and to make the final adjustements on my 2xGU13 (813) VLF PA. My special thanks to Steve, GW4ALG for all the help and advices. Next steep is the BIG loading coil, am not decided yet about the construction and materials. Have tested the FFT display and it seems to work ok, if all goes as planned in the next days will make some beacon transmisions in QRS mode on 137.40KHz which is the "cleanest spot" in my area. Wish you and yours a Merry Christmas and a Happy and Prosperous New Year. 73 & DX, Szigy. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24418 invoked from network); 20 Dec 2000 17:55:55 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 20 Dec 2000 17:55:55 -0000 Received: (qmail 20853 invoked from network); 20 Dec 2000 17:58:23 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 20 Dec 2000 17:58:23 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148nKp-00080z-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Dec 2000 17:47:27 +0000 Received: from yo2kjo.sorostm.ro ([193.226.98.64] helo=yo2kjo.ampr.org) by post.thorcom.com with smtp (Exim 3.16 #1) id 148nKm-00080u-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Dec 2000 17:47:25 +0000 X-BBS-Msg-Type: P Date: Wed, 20 Dec 00 17:47:12 +0000 Message-ID: <102@yo2kjo.ampr.org> From: yo2is@yo2kjo.ampr.org To: rsgb_lf_group@blacksheep.org Subject: LF: Info... Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit From: YO2IS Hello, despite some aparent stagnation due to the lack of LF activity in my area am "pushing hard" towards my first real "DX" contact on VLF. Was happy to get the QSL from 7S6SAJ for a X-band VLF QSO and to make the final adjustements on my 2xGU13 (813) VLF PA. My special thanks to Steve, GW4ALG for all the help and advices. Next steep is the BIG loading coil, am not decided yet about the construction and materials. Have tested the FFT display and it seems to work ok, if all goes as planned in the next days will make some beacon transmisions in QRS mode on 137.40KHz which is the "cleanest spot" in my area. Wish you and yours a Merry Christmas and a Happy and Prosperous New Year. 73 & DX, Szigy. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29379 invoked from network); 20 Dec 2000 14:57:08 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 20 Dec 2000 14:57:08 -0000 Received: (qmail 20441 invoked from network); 20 Dec 2000 14:59:33 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 20 Dec 2000 14:59:33 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148kab-00077Z-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Dec 2000 14:51:33 +0000 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148kaX-00077U-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Dec 2000 14:51:30 +0000 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail.cc.kuleuven.ac.be (8.9.3/8.9.0) with SMTP id PAA743722 for ; Wed, 20 Dec 2000 15:51:18 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3.0.1.16.20001220164308.2ddf4480@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Wed, 20 Dec 2000 16:43:08 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: VE1ZZ on 136 In-reply-to: References: <3A3EF49D.2232ADA1@ns.sympatico.ca> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: At 13:56 20/12/00 +0000, you wrote: >Hello all > >600 watts of RF puts about 4 amps into my long wire so if Jack VE1ZZ >gets 12 amps into his long wire, he must have 5 or 6 KW of RF! > >73, Tom G3OLB Or very low loss : 4 Amps with 600 Watts = 37.5 Ohm loss (at G3OLB) To get 12A with 600W loss must be as low as 4.5 Ohm, for 1kW you get 12A with a loss of about 7 Ohm and with 2kW it must be about 14 Ohm. I believe that Jack lives very close to the ocean, so in combination with a long wire losses as low as 10 Ohm (or less) are possible. 73, Rik ON7YD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23749 invoked from network); 20 Dec 2000 14:05:52 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 20 Dec 2000 14:05:52 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 21472 invoked from network); 20 Dec 2000 14:08:18 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 20 Dec 2000 14:08:18 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148jmo-0006tI-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Dec 2000 14:00:06 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from anchor-post-33.mail.demon.net ([194.217.242.91]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148jmn-0006tD-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Dec 2000 14:00:05 +0000 Received: from telemetry.demon.co.uk ([194.222.19.114]) by anchor-post-33.mail.demon.net with smtp (Exim 2.12 #1) id 148jmf-000C5z-0X for rsgb_lf_group@blacksheep.org; Wed, 20 Dec 2000 13:59:57 +0000 Message-ID: Date: Wed, 20 Dec 2000 13:56:37 +0000 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: Re: LF: VE1ZZ on 136 In-reply-to: <3A3EF49D.2232ADA1@ns.sympatico.ca> MIME-Version: 1.0 X-Mailer: Turnpike Version 3.03a Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello all 600 watts of RF puts about 4 amps into my long wire so if Jack VE1ZZ gets 12 amps into his long wire, he must have 5 or 6 KW of RF! 73, Tom G3OLB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 981 invoked from network); 20 Dec 2000 12:26:09 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 20 Dec 2000 12:26:09 -0000 Received: (qmail 21463 invoked from network); 20 Dec 2000 12:29:14 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 20 Dec 2000 12:29:14 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148iEm-0006Qw-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Dec 2000 12:20:52 +0000 Received: from [206.100.10.38] (helo=cobalt4.source.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148iEi-0006Qr-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Dec 2000 12:20:48 +0000 Received: from parissn2 (AMontsouris-101-1-4-91.abo.wanadoo.fr [193.253.216.91]) by cobalt4.source.net (8.9.3/8.9.3) with SMTP id EAA05829 for ; Wed, 20 Dec 2000 04:20:36 -0800 Message-ID: <005101c06a7f$7885cf40$0700000a@parissn2> From: "Stewart Nelson" To: rsgb_lf_group@blacksheep.org References: <200012200615_MC2-BF45-FC06@compuserve.com> Subject: LF: Re: RE: PSK experiments Date: Wed, 20 Dec 2000 13:22:05 +0100 Organization: SC Group MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2919.6700 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all, Cool Edit can be used to generate white noise and mix it with your test signal at a desired S/N. Or you can record "real" noise off the air and mix it in desired ratio with signal. And it can do FFT analyses, measure RMS power, generate interfering tones, etc. It lives up to its name! http://www.syntrillium.com I have no connection with Syntrillium - just a satisfied customer. 73, Stewart KK7KA ----- Original Message ----- From: "Holger 'Geri', DK8KW" To: Sent: Wednesday, December 20, 2000 12:15 PM Subject: LF: RE: PSK experiments > Andy, > > > >Does anyone have a programme to repeatedly play .WAV files in a > >continuous loop ? This will not be ideal for 'Coherent' data testing, > >as there will be a discontinuity at the wrap round point that will > >necessitate re-syncing, but is better than nothing.< > > ... look for a shareware called Cool Edit 2000, it comes with limited > features unless you pay for it, but it will do what you plan. It is a very > good graphic type editing file for all kinds of audio files. I use a > (licensed) copy to edit the music files we create (see www.piperswine.de > -hi-), but also for exactly what you plan to do, sending WAV BPSK files in > a loop. > > Best 73 > > Geri, DK8KW (W1KW) > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7313 invoked from network); 20 Dec 2000 11:31:31 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by extortion.plus.net with SMTP; 20 Dec 2000 11:31:31 -0000 Received: (qmail 13476 invoked from network); 20 Dec 2000 11:28:16 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 20 Dec 2000 11:28:16 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148hIH-00069l-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Dec 2000 11:20:25 +0000 Received: from gigi.excite.com ([199.172.152.110]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148hIF-00069I-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Dec 2000 11:20:24 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by gigi.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001220111945.YBVH9407.gigi.excite.com@almond.excite.com> for ; Wed, 20 Dec 2000 03:19:45 -0800 Message-ID: <16618640.977311185822.JavaMail.imail@almond.excite.com> Date: Wed, 20 Dec 2000 03:19:41 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: LF: re: EI0CF beacon MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 62.253.64.5 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Finbar, Can hear your beacon 439 on approx 137.71. Quite readable when the noise is low. Hope you are getting other reports. Don't have a direct E-mail for you so sending via Reflector. All the best for Christmas and the New Year. John, G4CNN Reading, IO91ML _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7042 invoked from network); 20 Dec 2000 11:31:19 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by extortion.plus.net with SMTP; 20 Dec 2000 11:31:19 -0000 Received: (qmail 12119 invoked from network); 20 Dec 2000 11:26:08 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 20 Dec 2000 11:26:08 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148hEo-00069B-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Dec 2000 11:16:50 +0000 Received: from ds-img-6.compuserve.com ([149.174.206.139] helo=spdmgaaf.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148hEk-000696-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Dec 2000 11:16:46 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by spdmgaaf.compuserve.com (8.9.3/8.9.3/SUN-1.9) id GAA02646 for rsgb_lf_group@blacksheep.org; Wed, 20 Dec 2000 06:16:09 -0500 (EST) Date: Wed, 20 Dec 2000 06:15:37 -0500 From: "Holger 'Geri', DK8KW" Subject: LF: RE: PSK experiments To: rsgb_lf_group@blacksheep.org Message-ID: <200012200615_MC2-BF45-FC06@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Andy, > >Does anyone have a programme to repeatedly play .WAV files in a >continuous loop ? This will not be ideal for 'Coherent' data testing, >as there will be a discontinuity at the wrap round point that will >necessitate re-syncing, but is better than nothing.< ... look for a shareware called Cool Edit 2000, it comes with limited features unless you pay for it, but it will do what you plan. It is a very good graphic type editing file for all kinds of audio files. I use a (licensed) copy to edit the music files we create (see www.piperswine.de -hi-), but also for exactly what you plan to do, sending WAV BPSK files in a loop. Best 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23147 invoked from network); 20 Dec 2000 10:51:10 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by extortion.plus.net with SMTP; 20 Dec 2000 10:51:10 -0000 Received: (qmail 26033 invoked from network); 20 Dec 2000 09:26:26 -0000 Content-Transfer-Encoding: 8bit Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 20 Dec 2000 09:26:26 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148fJ8-0005bR-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Dec 2000 09:13:10 +0000 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148fJ6-0005bM-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Dec 2000 09:13:09 +0000 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail.cc.kuleuven.ac.be (8.9.3/8.9.0) with SMTP id KAA1057022 for ; Wed, 20 Dec 2000 10:12:59 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3.0.1.16.20001220110449.403f882a@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Wed, 20 Dec 2000 11:04:49 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: LF: CFH logging In-reply-to: <13553.200012181440@gemini> References: <65AECDF1F89AD411900400508BFC869F0D749C@pdw-mail-1.dera.gov.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello group, I received the logging results from G4CNN, M0BMU, OH2LX, PA0SE, G3NYK and G8AFN so far (and ON7YD off course). Also got a mail from G3AQC that he will send a 'paper plot' to Alan. I will convert all files to the same 'standard' (excel, 1 minute averaging) over the weekend and sent all data to Alan. Based on the results from this first try it might be usefull to have a second recording night (somewhere january). Thanks to all participants. 73, Rik ON7YD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13316 invoked from network); 20 Dec 2000 09:14:17 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by extortion.plus.net with SMTP; 20 Dec 2000 09:14:17 -0000 Received: (qmail 18457 invoked from network); 20 Dec 2000 09:16:29 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 20 Dec 2000 09:16:29 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148f7E-0005Wi-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Dec 2000 09:00:52 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148f7A-0005Wd-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Dec 2000 09:00:48 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id JAA22091; Wed, 20 Dec 2000 09:01:12 GMT Received: (qmail 13662 invoked from network); 20 Dec 2000 09:55:35 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 20 Dec 2000 09:55:35 -0000 Received: by gauntlet.mail.dera.gov.uk; id JAA21331; Wed, 20 Dec 2000 09:49:48 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma021269; Wed, 20 Dec 00 09:49:25 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Wed, 20 Dec 2000 09:02:05 +0000 Received: by FRN-GOLD-1 with Internet Mail Service (5.0.1460.8) id ; Wed, 20 Dec 2000 09:00:09 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D74A9@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org, "Holtby Linda C" Subject: LF: RE: PSK experiments Date: Wed, 20 Dec 2000 09:00:21 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I have been generating VE2IQ compatible waveforms stored as .WAV files and making use of a constant amplitude envelope and raised cosine phase transition. Last night I tested some MS100 generated signals with phase transition times ranging from 5ms to 50ms. This latter version is quite narrow with the transition taking up half the entire bit interval, and sounds a little like PSK31 with a gentle warbling tone, although obviously a very different signal. On the perfect, noise free, WAV file 'Coherent' software has no trouble locking up to the waveform even on the slowest transition. The next step is to add a controlled amount of noise to the .WAV file and retest. I think I already have a prog to do this, culled from work on signal analysis a few years ago. 4 generated WAV files currently , each consisting of 80 seconds of MS100, ET1 coded message of 1.3meg each. Interestingly, all four ZIP up to a file just 20k - that's a serious compression ratio - so I can send copies to anyone who is interested in playing with this, so far experimental, scheme. It is difficult, though not impossible, to play these .WAV files over the air using my LF transverter if anyone wants to try off air reception. Does anyone have a programme to repeatedly play .WAV files in a continuous loop ? This will not be ideal for 'Coherent' data testing, as there will be a discontinuity at the wrap round point that will necessitate re-syncing, but is better than nothing. Andy G4JNT >>From DL2YHF > Claudio (IK2PII) for his contribution. I have to think about using a > four-quadrant multiplier, maybe this is another way to > produce the slow phase > shift. An I/Q multiplier is exactly what the 'original' > amplitude-shaped BSK > modulator uses. At the present time, I generate a kind of PSK > with "soft" > phase transitions using a simple sine function with a slowly > moving "phase > offset" to the argument, like > -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28772 invoked from network); 19 Dec 2000 20:41:34 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 19 Dec 2000 20:41:34 -0000 Received: (qmail 3895 invoked from network); 19 Dec 2000 20:36:33 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 19 Dec 2000 20:36:33 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148TO3-0002Ns-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Dec 2000 20:29:27 +0000 Received: from [194.73.73.138] (helo=ruthenium) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148TO2-0002Nn-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 20:29:26 +0000 Received: from [62.7.22.206] (helo=default) by ruthenium with smtp (Exim 3.03 #83) id 148TNq-00008H-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 20:29:14 +0000 Message-ID: <00d201c069f9$a652eec0$afb401d5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: CFH over Christmas Date: Tue, 19 Dec 2000 19:10:22 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all, according to my 'mole' CFH has been testing for new remote control software, which could account for the on-off nature of transmissions recently. It will not be needed for ships over the holiday period as they are all back in port for the festivities. Expect return (with modulation) in the New Year like last year. This probably means it could be on to test the remote control software (but unreliable !) over the holiday. Cheers de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14656 invoked from network); 19 Dec 2000 19:28:45 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 19 Dec 2000 19:28:45 -0000 Received: (qmail 27028 invoked from network); 19 Dec 2000 19:31:52 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 19 Dec 2000 19:31:52 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148SLg-00028I-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Dec 2000 19:22:56 +0000 Received: from gigi.excite.com ([199.172.152.110]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148SLf-00028D-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 19:22:55 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by gigi.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001219192239.SQIG9407.gigi.excite.com@almond.excite.com> for ; Tue, 19 Dec 2000 11:22:39 -0800 Message-ID: <17320989.977253759430.JavaMail.imail@almond.excite.com> Date: Tue, 19 Dec 2000 11:22:35 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Music on 137.79 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 62.253.64.5 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Andy, This is Hell fun. This low resolution Hell sounds quite musical, with dings and dongs. I find about 0.24 Hz resolution is about right and speed about a quarter scale on Spectran. I haven't checked the map, but you must be around 45 degrees from me, because it is equally good on either loop, one now N/S and the other E/W. Surely this must be easy to see across a good part of Europe? How come only Alan and I are giving reports? John G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10749 invoked from network); 19 Dec 2000 19:01:02 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 19 Dec 2000 19:01:02 -0000 Received: (qmail 24330 invoked from network); 19 Dec 2000 19:04:08 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 19 Dec 2000 19:04:09 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148RvU-0001zX-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Dec 2000 18:55:52 +0000 Received: from imo-r04.mx.aol.com ([152.163.225.4]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148RvS-0001zP-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 18:55:51 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from DL4YHF@aol.com by imo-r04.mx.aol.com (mail_out_v28.35.) id l.11.d5dbfa2 (3849) for ; Tue, 19 Dec 2000 13:55:04 -0500 (EST) From: DL4YHF@aol.com Message-ID: <11.d5dbfa2.27710908@aol.com> Date: Tue, 19 Dec 2000 13:55:04 EST Subject: LF: Re: PSK experiments, QSO between DK8KW and DF0WD To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: AOL 4.0.i for Windows 95 sub 69 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Geri, Rik, and others, Concerning the PSK31-signal generated from DF0WD: Oh yes, the signal must have been a little "broad" because the transverter which I used at DF0WD was a bit overdriven and so not really as 'linear' as it should have been. The absolute maximum output is about 100 Watts (with square waves at the drains), the output in PSK31 was much less, but still above the compression point of the transverter's PA. The bias current was quite low because usually I operate in CW. I was quite surprised to hear Geri's transmission to DL7YA, so I tried to call him (with success), though my rig was not properly set up. Furthermore, there was not even a PTT control from the computer to the radio, so I had to ask a "co-operator" to press the PTT of the IC706's microphone. Some letters of DF0WD's transmission have been missing because of the quite large delay-time of the 'human PTT switch' ! But things will improve. I am currently modifying the PSK TX algorithm (taken from WinPSK) so it can generate "phase ramps" instead of "amplitude shaping". This should reduce the bandwidth, even if the PA operates in non-linear mode as Klaus (DJ5HG) explained in an earlier posting to the group. Also thanks to Claudio (IK2PII) for his contribution. I have to think about using a four-quadrant multiplier, maybe this is another way to produce the slow phase shift. An I/Q multiplier is exactly what the 'original' amplitude-shaped BSK modulator uses. At the present time, I generate a kind of PSK with "soft" phase transitions using a simple sine function with a slowly moving "phase offset" to the argument, like y(t) = A * sin( F * t + phase), where 'A' is the output amplitude (constant !). 'F' is proportional to the frequency of the transmitted signal, 't' is the time (or the audio sample counter, which is equivalent) 'phase' generates the phase-shift modulation. Note that this is a rough simplification ! The trick is to find a proper function for the 'phase' to move between 0 and 180 degrees. But I don't want to bore you with details, because experiments are still going on. So thanks again to Geri for my first 2-way PSK QSO on LF and to Rik for the report and the comparison of both signals. Happy Christmas to all, and all the best for 2001, 73 from Wolf (DL4YHF, DF0WD) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12819 invoked from network); 19 Dec 2000 18:05:29 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 19 Dec 2000 18:05:29 -0000 Received: (qmail 26391 invoked from network); 19 Dec 2000 18:07:56 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 19 Dec 2000 18:07:56 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148R3y-0001jY-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Dec 2000 18:00:34 +0000 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148R3v-0001jT-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 18:00:31 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.200.44] (helo=gemini) by hestia.herts.ac.uk with esmtp (Exim 3.16 #4) id 148R1A-0005FM-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 17:57:40 +0000 Message-ID: <18596.200012191800@gemini> From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Tue, 19 Dec 2000 18:03:36 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: Guard circuit X-Mailer: Pegasus Mail for Win32 (v3.11) Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear Andy, LF group, To a reasonable approximation, the voltages in the tank circuit, and the guard circuit, will vary in direct proportion to the supply volts for a given value of load impedance. This should hold provided the forward voltage drop of the guard circuit diodes, and the voltage drop across the "on" Mosfets is much smaller than the supply voltage. So the guard circuit will operate at a particular impedance level, rather than a particular power/current/voltage level as with most overload protection. So one way to experiment with this type of circuit whilst minimising explosions would be to run the amp at a much lower supply voltage, say 34V - reducing the energy and power dissipation everywhere by a couple of orders of magnitude. Of course, in a circuit full of non-linear components, waveforms (eg. gate drive) will change a bit, and adjustments are bound to be needed when the full supply is restored, but it should be a good starting point. You could use cheaper low voltage components for the initial experiments, too. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6254 invoked from network); 19 Dec 2000 16:26:34 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 19 Dec 2000 16:26:34 -0000 Received: (qmail 25316 invoked from network); 19 Dec 2000 16:21:32 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 19 Dec 2000 16:21:32 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148PHi-0001FW-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Dec 2000 16:06:38 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148PHd-0001FP-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 16:06:33 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id QAA24128; Tue, 19 Dec 2000 16:07:02 GMT Received: (qmail 11731 invoked from network); 19 Dec 2000 17:01:28 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 19 Dec 2000 17:01:28 -0000 Received: by gauntlet.mail.dera.gov.uk; id QAA07660; Tue, 19 Dec 2000 16:55:45 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma007480; Tue, 19 Dec 00 16:55:09 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Tue, 19 Dec 2000 15:36:24 +0000 Received: by FRN-GOLD-1 with Internet Mail Service (5.0.1460.8) id ; Tue, 19 Dec 2000 15:34:31 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D74A6@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: Guard Circuit Date: Tue, 19 Dec 2000 15:34:43 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/html; charset=windows-1252 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Another way of looking at the guard circuit operation is this :
 
As the load resistance decreases, so the loaded Q of the Tank circuit goes up and the voltage across the L / C rises, (cf. more current flowing)  By clamping a proportion of this voltage to the supply then as the load R progressivelyd ecreases, the output devices are then switching more of their current into an out of phase circulatory current being returned to the supply until, with Rl = zero, all the current is circulating.
 
The difficult part of implementing this is to match the link on the tank coil to the supply.  As the loaded Q when operating normally is around 6, then ideally a voltage division of 6  would be needed.  But as this is an air cored coil, getting precise transformation ratios is not easy hence the series capacitor mentioned, needed to act as some sort of trimming element.
 
I did wonder about monitoring tank voltage directly via a high voltage diode ( 2000V diodes at low current eg. BY584) and using this to kill drive to the output devices. This is the same as monitoring RF current, but it may not be quick enough.  The only way is to try it out - and blow up moreI RF840s.  I've only got 6 left now out of an original stock of 24.  The final amp will use IRF462s and probably be set at 800W, but these cost money so testing will be done with the cheap surplus devices in the meantime.
 
Andy G4JNT
 
-----Original Message-----
From: James Moritz [mailto:j.r.moritz@herts.ac.uk]
Sent: 2000-12-18 14:44
To: rsgb_lf_group@blacksheep.org
Subject: LF: Guard Circuit

Dear Andy, LF Group,


Aha... wondered why you hadn't mentioned it before - unfortunately, the guard circuit is not shown in the simplified diagram in the LF handbook.


What it is - the tank coil has a link winding on it. This feeds the 'AC' side of a bridge rectifier made up of 4 fast diodes, via a series leakage inductance tuning capacitor. the 'DC' side is connected to some big plastic film reservoir capacitors, and then across the PA supply rail. In fig 3.20 in the handbook, it is assembled on the 3 heatsinks largely concealed by the tank capacitor boards. I think it works like this:


When the tank circuit current (determined by the load

impedance) exceeds a certain ratio with the supply voltage, the

voltage across the link winding forward biases the guard circuit

diodes, and returns power to the DC supply. This effectively

clamps the voltage across the tank circuit, and due to the

impedance transforming properties of the LC circuit, appears to the

PA as a non-linear resistance in series with the load which increases rapidly when the output current exceeds a certain point. If you monitor the 'guard', PA input, and supply currents as the load is decreased, the guard and PA currents increase, but the difference between them (ie. the supply current) decreases. With a dead short on the output, the PA current is increased by about 50%, eg, after the unit was re-tuned:


With 50ohm load, 60V supply -

Total PA supply current for 3 PA's = 21.8A = PSU supply current

Total guard current = 0.1A


With short circuit load -

Total PA current = 34.9A

Total guard current = 28.3A

Supply current from PSU = 6.5A


With the full supply voltage and a short circuit load, the PA modules run quite a bit warmer than normal, but not dangerously so, so this is an impressively rugged design!


I can send you a photocopy of the full diagrams if you like - also the details of how I tuned it up for a different frequency and load impedance, if anyone's interested.


Cheers, Jim Moritz

73 de M0BMU



--
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 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17150 invoked from network); 19 Dec 2000 12:52:05 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 19 Dec 2000 12:52:05 -0000 Received: (qmail 26891 invoked from network); 19 Dec 2000 12:55:11 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 19 Dec 2000 12:55:11 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148MAp-0000Oy-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Dec 2000 12:47:19 +0000 Received: from [194.73.73.138] (helo=ruthenium) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148MAm-0000Ot-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 12:47:16 +0000 Received: from [62.7.99.48] (helo=default) by ruthenium with smtp (Exim 3.03 #83) id 148MAU-00023q-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 12:46:58 +0000 Message-ID: <000301c069b9$0bfefb60$3063073e@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: VE1ZZ was sending last night Date: Tue, 19 Dec 2000 12:41:00 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi All, I only saw a Cluster spot from Jack this morning, timed at 0059z this morning to say he was sending on 136.5 between 0100 and 0130z. Unfortunately I did not have any more receivers or computers available last night! and would not have seen the spot anyway (my cluster machine is used for the CFH log). I am afraid with the possible delays, a 1min notice is barely useable, but it may be worth monitoring the OH site for anyone interested. It may be worth leaving Spectrogram running aroung 136.5 if you have that option available. He seems to prefer 0100z to 0130, 0200-0230z, and 0300-0330z. Cheers de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22721 invoked from network); 19 Dec 2000 11:13:18 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 19 Dec 2000 11:13:18 -0000 Received: (qmail 16445 invoked from network); 19 Dec 2000 11:15:45 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 19 Dec 2000 11:15:45 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148KdL-0008Tw-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Dec 2000 11:08:39 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148KdJ-0008Tr-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 11:08:37 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id LAA03343; Tue, 19 Dec 2000 11:09:05 GMT Received: (qmail 2210 invoked from network); 19 Dec 2000 12:03:31 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 19 Dec 2000 12:03:31 -0000 Received: by gauntlet.mail.dera.gov.uk; id LAA17520; Tue, 19 Dec 2000 11:57:48 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma017373; Tue, 19 Dec 00 11:57:26 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Tue, 19 Dec 2000 11:09:55 +0000 Received: by FRN-GOLD-1 with Internet Mail Service (5.0.1460.8) id ; Tue, 19 Dec 2000 11:08:02 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D74A2@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: Hell on 137.79 Date: Tue, 19 Dec 2000 11:08:15 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: That was 10Hz bandwidth, 0.2s pixel interval at about 500W output. Any requests for other modulation types (Hand / High speed CW is not an option) ? Andy G4JNT > -----Original Message----- > From: Alan Melia [mailto:Alan.Melia@btinternet.com] > Sent: 2000-12-18 22:41 > To: rsgb_lf_group@blacksheep.org > Subject: LF: Hell on 137.79 > > > Hi all nice copy of Andy's Hell beacon this evening on 137.79khz using > Spectrogram. > > Cheers de Alan G3NYK > Alan.Melia@btinternet.com > > > -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22710 invoked from network); 19 Dec 2000 11:13:18 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 19 Dec 2000 11:13:18 -0000 Received: (qmail 16434 invoked from network); 19 Dec 2000 11:15:45 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 19 Dec 2000 11:15:45 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148Kdd-0008U4-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Dec 2000 11:08:57 +0000 Received: from mail11.svr.pol.co.uk ([195.92.193.23]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148Kdc-0008Tz-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 11:08:56 +0000 Received: from modem-82.baranduin.dialup.pol.co.uk ([62.136.135.82] helo=lvm) by mail11.svr.pol.co.uk with smtp (Exim 3.13 #0) id 148KdS-0003Fz-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 11:08:47 +0000 Message-ID: <000101c069ac$87afa320$5287883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. CFH last night Date: Tue, 19 Dec 2000 11:11:36 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Alan/Rik and all, I plotted CFH last night ,they switched off at 2345 but came on at 0000 with a very good signal.Best sustained peak 0600-0800. Could mean that our best chance is for an early morning contact. I am sending my plots to Alan, via snail mail I am afraid. 73s Laurie. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23910 invoked from network); 19 Dec 2000 10:17:21 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 19 Dec 2000 10:17:21 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 9135 invoked from network); 19 Dec 2000 10:20:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 19 Dec 2000 10:20:26 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148JlI-0008GG-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Dec 2000 10:12:48 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from anchor-post-30.mail.demon.net ([194.217.242.88]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148JlF-0008GB-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 10:12:45 +0000 Received: from telemetry.demon.co.uk ([194.222.19.114]) by anchor-post-30.mail.demon.net with smtp (Exim 2.12 #1) id 148Jl8-000Ayw-0U for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 10:12:39 +0000 Message-ID: Date: Tue, 19 Dec 2000 10:00:53 +0000 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: Re: LF: Guard Circuit In-reply-to: <13553.200012181440@gemini> MIME-Version: 1.0 X-Mailer: Turnpike (32) Trial Version 3.05 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Jim Any chance of taking a copy of the Decca circuits for me? I will of course re-imburse copying and postage costs. Thanks, Tom G3OLB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15423 invoked from network); 19 Dec 2000 08:46:12 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 19 Dec 2000 08:46:12 -0000 Received: (qmail 22112 invoked from network); 19 Dec 2000 08:41:14 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 19 Dec 2000 08:41:14 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148IFA-0007pa-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Dec 2000 08:35:32 +0000 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148IF9-0007pV-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 08:35:31 +0000 Received: from oemcomputer (man-132.dialup.zetnet.co.uk [194.247.40.168]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id IAA23229 for ; Tue, 19 Dec 2000 08:35:23 GMT X-Authentication-Warning: irwell.zetnet.co.uk: Host man-132.dialup.zetnet.co.uk [194.247.40.168] claimed to be oemcomputer Message-ID: <005301c06997$0f478f20$a828f7c2@oemcomputer> From: "John Rabson" To: rsgb_lf_group@blacksheep.org Subject: LF: Fw: Slow-Audio (was Re: DX Cluster spots for 10/17Dec at GB7DXM) Date: Tue, 19 Dec 2000 08:38:22 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: We only got down to half bandwidth, but... ----- Original Message ----- From: John Rabson To: Sent: Monday, December 18, 2000 10:01 PM Subject: Slow-Audio (was Re: DX Cluster spots for 10/17Dec at GB7DXM) > You might find this paper interesting: > > Rabson, John and Hugo (1996) 'Some Experiments in Speech Bandwidth Reduction > ', CREG Journal 24, pp3,6. > > If you have difficulty getting hold of the article please let me know. > > ----- Original Message ----- > From: Holger 'Geri' Kinzel, DK8KW > To: > Sent: Monday, December 18, 2000 7:55 AM > Subject: LF: DX Cluster spots for 10/17Dec at GB7DXM > > > > Another thought: we in Germany are allowed to use any mode with a maximum > > bandwidth of 800Hz. I know that normal 2.1 kHz wide SSB signals havne been > > transmitted in the early days of LF in the UK. Has anyone ever thought of > > "Slow-Audio" instead of Slow-CW? My idea is to use an audio editing > program > > such as Cool Edit (available as shareware) and reduce the running speed, > so > > that a normal sharply filtered (the filter is a build-in feature of Cool > > Edit) 2.4 kHz audio signal is compressed into 800 Hz or an even smaller > > bandwidth. The same software could then be used to expand the signal again > > and make it audible. I plan to do some local testing (and yes: I will run > > those on reduced power using time slots when normally there is no traffic, > > I do not want to block the entire band with such a funny signal ...) to > see > > what can be achieved ... > > 73 de > John Rabson G3PAI > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1874 invoked from network); 19 Dec 2000 08:21:38 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 19 Dec 2000 08:21:38 -0000 Received: (qmail 28476 invoked from network); 19 Dec 2000 08:24:44 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 19 Dec 2000 08:24:44 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148HzA-0007lg-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Dec 2000 08:19:00 +0000 Received: from hs-img-1.compuserve.com ([149.174.177.150] helo=sphmgaaa.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148Hz8-0007lb-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 08:18:58 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by sphmgaaa.compuserve.com (8.9.3/8.9.3/SUN-1.9) id DAA15741 for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 03:18:21 -0500 (EST) Date: Tue, 19 Dec 2000 03:17:56 -0500 From: "Holger 'Geri' Kinzel, DK8KW" Subject: LF: Speech Compression Article? To: rsgb_lf_group@blacksheep.org Message-ID: <200012190318_MC2-BF12-F7B6@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello LF-Group, someone posted an information about an article on speech compression yesterday as a reply to my suggestion, to squeeze normal speech into 800 Hz bandwidth. Accidently I deleted the message today, could you please re-post it. Thank you, best 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10398 invoked from network); 19 Dec 2000 04:45:03 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 19 Dec 2000 04:45:03 -0000 Received: (qmail 10272 invoked from network); 19 Dec 2000 04:48:08 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 19 Dec 2000 04:48:08 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148EXX-0006ti-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Dec 2000 04:38:15 +0000 Received: from mta01.mail.au.uu.net ([203.2.192.81] helo=mta01.mail.mel.aone.net.au) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148EXW-0006td-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 04:38:14 +0000 Received: from mstubbs ([63.60.255.97]) by mta01.mail.mel.aone.net.au with SMTP id <20001219043758.TBLC26418.mta01.mail.mel.aone.net.au@mstubbs> for ; Tue, 19 Dec 2000 15:37:58 +1100 Message-ID: <000201c0696c$e3d140e0$61ff3c3f@mstubbs> From: "Michael Stubbs-Race" To: rsgb_lf_group@blacksheep.org Subject: LF: LF Experimenter's Handbook. Date: Tue, 19 Dec 2000 14:25:41 +1100 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
LF Handbook arrived today after 8 weeks, but well worth the wait. Congratulations to the writers and editor, an excellent tome, nicely produced.
 
Criticism? Well naturally it's too short but I'll anxiously await Vol 2.
 
Good work OMs. Now all we need is a new VK allocation, but then the mills of God (Australian Communications Commission) grind slowly. . .
 
73
 
Mike  VK2ASR
 
RSGB please note, Offer airmail as an alternative to surface.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 33 invoked from network); 19 Dec 2000 00:49:21 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 19 Dec 2000 00:49:21 -0000 Received: (qmail 26587 invoked from network); 19 Dec 2000 00:44:22 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 19 Dec 2000 00:44:22 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148AoR-0005u1-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Dec 2000 00:39:27 +0000 Received: from jubilee.ns.sympatico.ca ([142.177.1.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148AoQ-0005tw-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 00:39:26 +0000 Received: from ns.sympatico.ca ([142.177.77.14]) by jubilee.ns.sympatico.ca (Post.Office MTA v3.5.2 release 221 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Mon, 18 Dec 2000 20:39:18 -0400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A3EF49D.2232ADA1@ns.sympatico.ca> Date: Tue, 19 Dec 2000 00:39:41 -0500 From: "John Currie" X-Mailer: Mozilla 4.7 [en]C-DIAL (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: VE1ZZ on 136 References: <003601c0680f$e32c3fe0$a50997d4@W98.swipnet.se> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all Some statements about Jack VE1ZZ 1 He has been transmitting intermittently on 136.5 for a while now 2 If he sees a big signal from DCF39 he transmits 3 He has no computer 4 antenna is long wire 900 feet 5 ant current is 12 Amperes!!!! 6 His rig has been drifting for months Jack sent money for crystal on 27 of September He received it 14 december. At time of OH2AQ report he had tx crystal controlled. 7 He will put further reports on OH2AQ cluster I suggest we look for them and if anybody sees them we port the OH2AQ posting to this bulletin board. 8 after Christmas , wx permitting I will take my computer to Jack's house so we can try two way 9In the last 10 days Ihave seen typical field strengths of S-6 and S-7 on 128.9 and DCF-39. Strongest was 11 Dec when 129.9 was S-8.5 and DCF39 was S-7 When I saw G0MRF 128.9 was S-5 to S-6 10 S-8.5 shud permit regular cw contact between Jack and G0MRF at special site. 11 S-7 represents approximately 100 microvolts / meter field strength. S-8.5 should represent almost 300 microvolts/ meter from 128.9 kHz German station. 12 I am haveing bad time from intermittent 60 Hz multiples. as high as S-5 13 Jack's fone number is 1-902 889-2859 73 all es GL es happy holidays de John VE1ZJ Christer Andersson wrote: > Found this on the OH2AQ DX cluster > > VE1ZZ 1800.0 VE1ZZ 136.5 01z 02z 03z 1/2hr qrss. 0047 17 Dec > > /sm6pxj From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9614 invoked from network); 19 Dec 2000 00:23:54 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 19 Dec 2000 00:23:54 -0000 Received: (qmail 6715 invoked from network); 19 Dec 2000 00:26:19 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 19 Dec 2000 00:26:19 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148AVy-0005ps-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Dec 2000 00:20:22 +0000 Received: from carbon.btinternet.com ([194.73.73.92]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148AVx-0005pm-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 00:20:21 +0000 Received: from [213.1.77.95] (helo=default) by carbon.btinternet.com with smtp (Exim 3.03 #83) id 148AVq-0005gm-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Dec 2000 00:20:15 +0000 Message-ID: <001c01c06950$c7c43a40$5f4d01d5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: Hell on 137.79 Date: Mon, 18 Dec 2000 22:40:51 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all nice copy of Andy's Hell beacon this evening on 137.79khz using Spectrogram. Cheers de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8980 invoked from network); 18 Dec 2000 23:23:44 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 18 Dec 2000 23:23:44 -0000 Received: (qmail 18867 invoked from network); 18 Dec 2000 23:18:45 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Dec 2000 23:18:45 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1489Qx-0005TU-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 23:11:07 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1489Qu-0005TP-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 23:11:05 +0000 Received: from central.zetnet.co.uk (central.zetnet.co.uk [194.247.47.20]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id XAA02067 for ; Mon, 18 Dec 2000 23:10:57 GMT X-ZSender: g3ldo@zetnet.co.uk Message-ID: <2000121823082968199@zetnet.co.uk> Date: Mon, 18 Dec 2000 23:08:29 GMT To: rsgb_lf_group@blacksheep.org From: "Peter Dodd" X-Mailer: ZIMACS Version 1.20c 10000836 Subject: Re: LF: Guard Circuit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Jim said: > Aha... wondered why you hadn't mentioned it before - > unfortunately, the guard circuit is not shown in the simplified > diagram in the LF handbook. > What it is - the tank coil has a link winding on it. This feeds the 'AC' > side of a bridge rectifier made up of 4 fast diodes, via a series > leakage inductance tuning capacitor. the 'DC' side is connected to > some big plastic film reservoir capacitors, and then across the PA > supply rail. In fig 3.20 in the handbook, it is assembled on the 3 > heatsinks largely concealed by the tank capacitor boards. At the time I put the Low Frequency Handbook together I had not done any work regarding the modification of the Decca transmitter. I felt that the circuit should be included in a simplified form because it showed a design not in use by amateurs at the time. Furthermore, no one else had any experience of this type of PA circuit and I didn't know how the guard circuit worked; and it is only possible to simplify a circuit whose function is understood. Andy sent me the data sheet on the bridge configuration PA driver and that was included in the Appendix. I can confirm that the guard circuit works if the output is short circuited. I had shorted the output of each amplifier at the output of the tank circuits so that I could measure the tank resonances. I forgot to remove the shorts when I fired the transmitter up the first time. The only indication that anything was wrong was the output current was zero and each of the amplifier guard circuits indicated current flow. When the shorts were removed the guard current fell to zero and the dummy load got very hot. I have never noticed any guard current during normal operation - even when tuning. I think they only seem to come into play in the case of a severe mismatch -- Regards, Peter, G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9301 invoked from network); 18 Dec 2000 22:09:39 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 18 Dec 2000 22:09:39 -0000 Received: (qmail 11572 invoked from network); 18 Dec 2000 22:12:04 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Dec 2000 22:12:04 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1488OV-0005Eo-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 22:04:31 +0000 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1488OR-0005Ej-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 22:04:28 +0000 Received: from oemcomputer (man-083.dialup.zetnet.co.uk [194.247.41.103]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id WAA24471 for ; Mon, 18 Dec 2000 22:04:17 GMT X-Authentication-Warning: irwell.zetnet.co.uk: Host man-083.dialup.zetnet.co.uk [194.247.41.103] claimed to be oemcomputer Message-ID: <000201c0693e$e57f7c00$6729f7c2@oemcomputer> From: "John Rabson" To: rsgb_lf_group@blacksheep.org References: <200012180256_MC2-BEEE-4A22@compuserve.com> Subject: LF: Slow-Audio (was Re: DX Cluster spots for 10/17Dec at GB7DXM) Date: Mon, 18 Dec 2000 22:01:03 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: You might find this paper interesting: Rabson, John and Hugo (1996) 'Some Experiments in Speech Bandwidth Reduction ', CREG Journal 24, pp3,6. If you have difficulty getting hold of the article please let me know. ----- Original Message ----- From: Holger 'Geri' Kinzel, DK8KW To: Sent: Monday, December 18, 2000 7:55 AM Subject: LF: DX Cluster spots for 10/17Dec at GB7DXM > Another thought: we in Germany are allowed to use any mode with a maximum > bandwidth of 800Hz. I know that normal 2.1 kHz wide SSB signals havne been > transmitted in the early days of LF in the UK. Has anyone ever thought of > "Slow-Audio" instead of Slow-CW? My idea is to use an audio editing program > such as Cool Edit (available as shareware) and reduce the running speed, so > that a normal sharply filtered (the filter is a build-in feature of Cool > Edit) 2.4 kHz audio signal is compressed into 800 Hz or an even smaller > bandwidth. The same software could then be used to expand the signal again > and make it audible. I plan to do some local testing (and yes: I will run > those on reduced power using time slots when normally there is no traffic, > I do not want to block the entire band with such a funny signal ...) to see > what can be achieved ... 73 de John Rabson G3PAI From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20336 invoked from network); 18 Dec 2000 19:50:36 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 18 Dec 2000 19:50:36 -0000 Received: (qmail 8454 invoked from network); 18 Dec 2000 19:53:01 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Dec 2000 19:53:01 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1486DP-0004hA-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 19:44:55 +0000 Received: from smtp06.wxs.nl ([195.121.6.58]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1486DO-0004h5-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 19:44:54 +0000 Received: from default ([195.121.216.105]) by smtp06.wxs.nl (Netscape Messaging Server 4.05) with SMTP id G5S46000.D4R for ; Mon, 18 Dec 2000 20:44:24 +0100 Message-ID: <006901c0692a$cc5d8dc0$69d879c3@default> From: "ko versteeg" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: CFH recording night : monday 18 december Date: Mon, 18 Dec 2000 20:41:53 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.1 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Rick, Bob Version 1.3.25 is the first i found and the last. There's nothing to adjust, just hit calibrate and go. Note that calibrate only works when the "Mic" input is used The tip of the "Mic" carries 5V so you might want to use the other channel. 73, Ko NL9222 -----Original Message----- From: Rik Strobbe To: rsgb_lf_group@blacksheep.org Date: Monday, December 18, 2000 12:08 PM Subject: Re: LF: CFH recording night : monday 18 december >Hello Bob, > >I am using the version that was available at the time of the eclpise (11 >aug 1999), it has no possibilities to adjust the recording speed or put >time ticks on the trace. >I will check the lastest version to see if any of these features have been >added. > >73, Rik ON7YD > >At 15:16 15/12/00 -0500, you wrote: >>Hello Rick >> >>I have Eclipse on my HD but have forgotten the HOW TO >> >>How is the speed adjusted to record for a long. day / hour time >>and is there a way to put time ticks on the tracing >> >>OR just send me the read me file if there is one >> >>Bob K3DJC >> >> > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17406 invoked from network); 18 Dec 2000 19:24:05 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 18 Dec 2000 19:24:05 -0000 Received: (qmail 28023 invoked from network); 18 Dec 2000 19:27:10 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Dec 2000 19:27:10 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1485qU-0004Zx-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 19:21:14 +0000 Received: from cmailg3.svr.pol.co.uk ([195.92.195.173]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1485qS-0004Zs-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 19:21:12 +0000 Received: from modem-116.dernhelm.dialup.pol.co.uk ([62.136.154.116] helo=lvm) by cmailg3.svr.pol.co.uk with smtp (Exim 3.13 #0) id 1485qK-00077b-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 19:21:05 +0000 Message-ID: <002701c06928$217ca8c0$3d1d893e@lvm> From: "LAWRENCE MAYHEAD" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Guard Circuit Date: Mon, 18 Dec 2000 19:23:26 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Yes please Jim, I am considering an 800W amp so this guard circuit could be very useful. 73s Laurie
-----Original Message-----
From: James Moritz <j.r.moritz@herts.ac.uk>
To: rsgb_lf_group@blacksheep.org <rsgb_lf_group@blacksheep.org>
Date: 18 December 2000 14:53
Subject: LF: Guard Circuit

Dear Andy, LF Group,

Aha... wondered why you hadn't mentioned it before - unfortunately, the guard circuit is not shown in the simplified diagram in the LF handbook.

What it is - the tank coil has a link winding on it. This feeds the 'AC' side of a bridge rectifier made up of 4 fast diodes, via a series leakage inductance tuning capacitor. the 'DC' side is connected to some big plastic film reservoir capacitors, and then across the PA supply rail. In fig 3.20 in the handbook, it is assembled on the 3 heatsinks largely concealed by the tank capacitor boards. I think it works like this:

When the tank circuit current (determined by the load
impedance) exceeds a certain ratio with the supply voltage, the
voltage across the link winding forward biases the guard circuit
diodes, and returns power to the DC supply. This effectively
clamps the voltage across the tank circuit, and due to the
impedance transforming properties of the LC circuit, appears to the
PA as a non-linear resistance in series with the load which increases rapidly when the output current exceeds a certain point. If you monitor the 'guard', PA input, and supply currents as the load is decreased, the guard and PA currents increase, but the difference between them (ie. the supply current) decreases. With a dead short on the output, the PA current is increased by about 50%, eg, after the unit was re-tuned:

With 50ohm load, 60V supply -
Total PA supply current for 3 PA's = 21.8A = PSU supply current
Total guard current = 0.1A

With short circuit load -
Total PA current = 34.9A
Total guard current = 28.3A
Supply current from PSU = 6.5A

With the full supply voltage and a short circuit load, the PA modules run quite a bit warmer than normal, but not dangerously so, so this is an impressively rugged design!

I can send you a photocopy of the full diagrams if you like - also the details of how I tuned it up for a different frequency and load impedance, if anyone's interested.

Cheers, Jim Moritz
73 de M0BMU

From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18088 invoked from network); 18 Dec 2000 19:23:18 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 18 Dec 2000 19:23:18 -0000 Received: (qmail 21902 invoked from network); 18 Dec 2000 19:25:43 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 18 Dec 2000 19:25:43 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1485nm-0004ZS-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 19:18:26 +0000 Received: from cmailg3.svr.pol.co.uk ([195.92.195.173]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1485nk-0004ZN-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 19:18:24 +0000 Received: from modem-61.hogfish.dialup.pol.co.uk ([62.137.29.61] helo=lvm) by cmailg3.svr.pol.co.uk with smtp (Exim 3.13 #0) id 1485nX-0006Ko-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 19:18:12 +0000 Message-ID: <001301c06927$ba5d6da0$3d1d893e@lvm> From: "LAWRENCE MAYHEAD" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: RE: Guard Circuit Date: Mon, 18 Dec 2000 19:21:29 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Yes please Jim, I am thinking about an 800W amplifier and this Guard circuit could be very useful.73s Laurie.
-----Original Message-----
From: Talbot Andrew <ACTALBOT@dera.gov.uk>
To: 'rsgb_lf_group@blacksheep.org' <rsgb_lf_group@blacksheep.org>
Date: 18 December 2000 16:16
Subject: LF: RE: Guard Circuit

Tnx for that Jim, think I can see how it works.  Now have to think how to translate into a 340V supply half bridge version - hopefully link and L values will stay realistic.
 
Andy
-----Original Message-----
From: James Moritz [mailto:j.r.moritz@herts.ac.uk]
Sent: 2000-12-18 14:44
To: rsgb_lf_group@blacksheep.org
Subject: LF: Guard Circuit

Dear Andy, LF Group,


Aha... wondered why you hadn't mentioned it before - unfortunately, the guard circuit is not shown in the simplified diagram in the LF handbook.


What it is - the tank coil has a link winding on it. This feeds the 'AC' side of a bridge rectifier made up of 4 fast diodes, via a series leakage inductance tuning capacitor. the 'DC' side is connected to some big plastic film reservoir capacitors, and then across the PA supply rail. In fig 3.20 in the handbook, it is assembled on the 3 heatsinks largely concealed by the tank capacitor boards. I think it works like this:


When the tank circuit current (determined by the load

impedance) exceeds a certain ratio with the supply voltage, the

voltage across the link winding forward biases the guard circuit

diodes, and returns power to the DC supply. This effectively

clamps the voltage across the tank circuit, and due to the

impedance transforming properties of the LC circuit, appears to the

PA as a non-linear resistance in series with the load which increases rapidly when the output current exceeds a certain point. If you monitor the 'guard', PA input, and supply currents as the load is decreased, the guard and PA currents increase, but the difference between them (ie. the supply current) decreases. With a dead short on the output, the PA current is increased by about 50%, eg, after the unit was re-tuned:


With 50ohm load, 60V supply -

Total PA supply current for 3 PA's = 21.8A = PSU supply current

Total guard current = 0.1A


With short circuit load -

Total PA current = 34.9A

Total guard current = 28.3A

Supply current from PSU = 6.5A


With the full supply voltage and a short circuit load, the PA modules run quite a bit warmer than normal, but not dangerously so, so this is an impressively rugged design!


I can send you a photocopy of the full diagrams if you like - also the details of how I tuned it up for a different frequency and load impedance, if anyone's interested.


Cheers, Jim Moritz

73 de M0BMU



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From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5663 invoked from network); 18 Dec 2000 19:07:04 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 18 Dec 2000 19:07:04 -0000 Received: (qmail 21278 invoked from network); 18 Dec 2000 19:02:04 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Dec 2000 19:02:04 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1485Pw-0004R4-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 18:53:48 +0000 Received: from gadolinium.btinternet.com ([194.73.73.111]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1485Pv-0004Qz-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 18:53:47 +0000 Received: from [213.1.66.127] (helo=default) by gadolinium.btinternet.com with smtp (Exim 3.03 #83) id 1485Pn-0003yd-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 18:53:39 +0000 Message-ID: <000901c06923$23858a60$7f4201d5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: CFH gone again Date: Mon, 18 Dec 2000 18:48:37 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi John thanks I had just checked, and its has gone. I also had a look at the solar X-ray plots to see if the appearance was due to a flare but it was normal winter propagation I think. Pity it seems like it would have been a good night to do it. I will wait until midnight before aborting my plot. Cheers de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29270 invoked from network); 18 Dec 2000 17:55:23 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 18 Dec 2000 17:55:23 -0000 Received: (qmail 13433 invoked from network); 18 Dec 2000 17:57:49 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 18 Dec 2000 17:57:49 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1484PA-00048q-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 17:48:56 +0000 Received: from ewey-rwcmta.excite.com ([198.3.99.191] helo=ewey.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1484P9-00048l-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 17:48:55 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by ewey.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001218174843.JHAY9549.ewey.excite.com@almond.excite.com> for ; Mon, 18 Dec 2000 09:48:43 -0800 Message-ID: <28328953.977161723809.JavaMail.imail@almond.excite.com> Date: Mon, 18 Dec 2000 09:48:39 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: CFH is back om MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 213.104.148.39 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: It's gone again Alan. Time now 17.48. John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10880 invoked from network); 18 Dec 2000 17:29:22 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 18 Dec 2000 17:29:22 -0000 Received: (qmail 26595 invoked from network); 18 Dec 2000 17:24:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 18 Dec 2000 17:24:23 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1483rR-00040h-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 17:14:05 +0000 Received: from cmailg3.svr.pol.co.uk ([195.92.195.173]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1483rQ-00040W-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 17:14:04 +0000 Received: from modem-142.antimony.dialup.pol.co.uk ([62.136.42.142] helo=default) by cmailg3.svr.pol.co.uk with smtp (Exim 3.13 #0) id 1483rE-0005id-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 17:13:53 +0000 Message-ID: <000601c06915$2e8b88a0$8e2a883e@default> From: "MAL HAMILTON" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: RE: other reports Date: Mon, 18 Dec 2000 17:06:00 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: -----Original Message----- From: Talbot Andrew To: 'rsgb_lf_group@blacksheep.org' Date: 18 December 2000 09:16 Subject: LF: RE: other reports >Still the same power, but wet surroundings may make the antenna less >efficient. The load R has risen so looks valid. The BPSK message is >stored in PIC so won't change in the immediate future, I was soak >testing the PA and thought you'd prefer a message to a carrier. Keeps >within the spirit of the licence ID rules as well. > >May not persue the 2.5kW full bridge PA design. I had a couple of >rather frightening explosions yesterday that were a bit off-putting. >NEVER, EVER EVER use a make before break switch for hot switching >transformer taps Hot switching RF under any circumstances is risking device failure. I thought that was golden rule number one.!!!!!!!! While make before break helps it is better to switch off, make the tap adjustment and then turn it back on again. I use this procedure when adjusting my PA power levels and so far have never blown any FETS !!!!!!!!! It pays to be careful. Regarding super ac/bridge amplifiers. I know a man using that procedure and he can light up a 3kw electric fire as a dummy load. He is winding a new loading coil for the antenna using copper microbore tubing. Monitoring on a scope reveals a nice square wave into the electric fire but when connected to a 50 ohm dummy load the wave goes triangular. Expect there is an impedence mismatch/loading problem but the device is still in the experimental stage and no doubt will be rectified. These amplifiers need a man with a steady hand and a stout heart. It is important when testing to get behind a screen to protect yourself from flying debris if there is a bang. The electric fire DL versus the carbon resistor 50 ohm load is the opposite to what one would expect. The electric fire wire would element characteristics need investigating. The man says going beyond the 3kw o/p level causes too much voltage sag and almost puts the house in darkness. Expect he really needs a 3 phase supply. , I hadn't spotted it was Mb4B. That's the trouble >with having a very extensive junk box - don't tend to look at components >carefully enough. >But the present half bridge design will upgrade to 800W reliably with >IRF462 devices -cheaper than IRF450. Still need a very fast acting OP >short circuit protection circuit. > >Andy G4JNT > > >> Also Andy is on testing again at 13.00 but the same old >> message - could send >> out some sort of lowfer news for those without E-mail. You >> are S8 with me >> Andy, but not sure whether full power, sounded louder when I >> first heard >> you, but then went off before I could look at the S meter. >> John, G4CNN >> Reading, IO91ML24 >> >> >> >> > > >-- >The Information contained in this E-Mail and any subsequent correspondence >is private and is intended solely for the intended recipient(s). >For those other than the recipient any disclosure, copying, distribution, >or any action taken or omitted to be taken in reliance on such information is >prohibited and may be unlawful. > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19520 invoked from network); 18 Dec 2000 17:21:24 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 18 Dec 2000 17:21:24 -0000 Received: (qmail 14532 invoked from network); 18 Dec 2000 17:24:29 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Dec 2000 17:24:29 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1483rP-00040b-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 17:14:03 +0000 Received: from cmailg3.svr.pol.co.uk ([195.92.195.173]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1483rO-00040V-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 17:14:02 +0000 Received: from modem-142.antimony.dialup.pol.co.uk ([62.136.42.142] helo=default) by cmailg3.svr.pol.co.uk with smtp (Exim 3.13 #0) id 1483rC-0005id-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 17:13:51 +0000 Message-ID: <000501c06915$2d98eb40$8e2a883e@default> From: "MAL HAMILTON" To: "rsgb" Subject: LF: Insulators Date: Mon, 18 Dec 2000 16:30:54 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: If you live near a fishing port go to the port equipment shop and get some crab pot spinners. These are light weight polysterene devices, white in colour, shaped like a flat dog bone and very strong with an eye at each end. There are two sizes available. 10.5 cms long x 3.2 cms wide in the middle and the other larger size is 11.5 cms long x 4.2 cms wide in the middle. Use 2 or more of these in series if necessary. So far they have never given me any trouble with flash over or melt down. I have not taken any special precautions keeping them clean but that is easy to do if required. 73 de G3KEV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7799 invoked from network); 18 Dec 2000 17:12:25 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 18 Dec 2000 17:12:25 -0000 Received: (qmail 1468 invoked from network); 18 Dec 2000 17:15:30 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Dec 2000 17:15:30 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1483jB-0003wg-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 17:05:33 +0000 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1483jA-0003wb-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 17:05:32 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail.cc.kuleuven.ac.be (8.9.3/8.9.0) with SMTP id SAA531340 for ; Mon, 18 Dec 2000 18:05:20 +0100 Message-ID: <3.0.1.16.20001218185710.21af9f88@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Mon, 18 Dec 2000 18:57:10 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: CFH is back om In-reply-to: <003101c0690e$7ef64020$11f87ad5@default> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: OK, let's hope that CFH stays on all night and give it a try ... Datafiles (if possible zipped) can be sent to me, I will sent them to Alan and whoever is interested. 73, Rik ON7YD At 16:19 18/12/00 -0000, you wrote: >Hi Rik, and all, CFH seems to have come back on, I have a reasonable >strenggth carrier on the LF sub-carrier frequency 136.96kHz. So I will be >monitoring tonight. > >Cheers de Alan G3NYK >Alan.Melia@btinternet.com > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16344 invoked from network); 18 Dec 2000 16:57:26 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 18 Dec 2000 16:57:26 -0000 Received: (qmail 19180 invoked from network); 18 Dec 2000 16:59:52 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 18 Dec 2000 16:59:52 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1483TF-0003sf-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 16:49:05 +0000 Received: from fortune-rwcmta.excite.com ([198.3.99.203] helo=fortune.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1483TE-0003sT-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 16:49:04 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by fortune.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001218164815.IZCZ9490.fortune.excite.com@almond.excite.com> for ; Mon, 18 Dec 2000 08:48:15 -0800 Message-ID: <3271552.977158095397.JavaMail.imail@almond.excite.com> Date: Mon, 18 Dec 2000 08:48:12 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: LF: re: monitoring CFH tonight MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 213.104.153.56 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Rik and all monitors, CFH has been off all day, but I can now see a carrier at 136.96. Is it a go or do we postpone until it gets back to normal? John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9814 invoked from network); 18 Dec 2000 16:31:13 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 18 Dec 2000 16:31:13 -0000 Received: (qmail 8427 invoked from network); 18 Dec 2000 16:33:39 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 18 Dec 2000 16:33:39 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 148376-0003km-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 16:26:12 +0000 Received: from gadolinium.btinternet.com ([194.73.73.111]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 148375-0003kh-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 16:26:11 +0000 Received: from [213.122.248.17] (helo=default) by gadolinium.btinternet.com with smtp (Exim 3.03 #83) id 14836q-0000Qu-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 16:25:56 +0000 Message-ID: <003101c0690e$7ef64020$11f87ad5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: CFH is back om Date: Mon, 18 Dec 2000 16:19:15 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Rik, and all, CFH seems to have come back on, I have a reasonable strenggth carrier on the LF sub-carrier frequency 136.96kHz. So I will be monitoring tonight. Cheers de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8348 invoked from network); 18 Dec 2000 16:08:33 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 18 Dec 2000 16:08:33 -0000 Received: (qmail 15865 invoked from network); 18 Dec 2000 16:10:58 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Dec 2000 16:10:58 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1482k4-0003fW-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 16:02:24 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1482k0-0003fR-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 16:02:21 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id QAA14572; Mon, 18 Dec 2000 16:02:48 GMT Received: (qmail 15189 invoked from network); 18 Dec 2000 16:57:18 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 18 Dec 2000 16:57:18 -0000 Received: by gauntlet.mail.dera.gov.uk; id QAA11970; Mon, 18 Dec 2000 16:51:39 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma011924; Mon, 18 Dec 00 16:51:06 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Mon, 18 Dec 2000 16:03:26 +0000 Received: by FRN-GOLD-1 with Internet Mail Service (5.0.1460.8) id ; Mon, 18 Dec 2000 16:01:34 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D749F@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: Guard Circuit Date: Mon, 18 Dec 2000 16:01:46 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/html; charset=windows-1252 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Tnx for that Jim, think I can see how it works.  Now have to think how to translate into a 340V supply half bridge version - hopefully link and L values will stay realistic.
 
Andy
-----Original Message-----
From: James Moritz [mailto:j.r.moritz@herts.ac.uk]
Sent: 2000-12-18 14:44
To: rsgb_lf_group@blacksheep.org
Subject: LF: Guard Circuit

Dear Andy, LF Group,


Aha... wondered why you hadn't mentioned it before - unfortunately, the guard circuit is not shown in the simplified diagram in the LF handbook.


What it is - the tank coil has a link winding on it. This feeds the 'AC' side of a bridge rectifier made up of 4 fast diodes, via a series leakage inductance tuning capacitor. the 'DC' side is connected to some big plastic film reservoir capacitors, and then across the PA supply rail. In fig 3.20 in the handbook, it is assembled on the 3 heatsinks largely concealed by the tank capacitor boards. I think it works like this:


When the tank circuit current (determined by the load

impedance) exceeds a certain ratio with the supply voltage, the

voltage across the link winding forward biases the guard circuit

diodes, and returns power to the DC supply. This effectively

clamps the voltage across the tank circuit, and due to the

impedance transforming properties of the LC circuit, appears to the

PA as a non-linear resistance in series with the load which increases rapidly when the output current exceeds a certain point. If you monitor the 'guard', PA input, and supply currents as the load is decreased, the guard and PA currents increase, but the difference between them (ie. the supply current) decreases. With a dead short on the output, the PA current is increased by about 50%, eg, after the unit was re-tuned:


With 50ohm load, 60V supply -

Total PA supply current for 3 PA's = 21.8A = PSU supply current

Total guard current = 0.1A


With short circuit load -

Total PA current = 34.9A

Total guard current = 28.3A

Supply current from PSU = 6.5A


With the full supply voltage and a short circuit load, the PA modules run quite a bit warmer than normal, but not dangerously so, so this is an impressively rugged design!


I can send you a photocopy of the full diagrams if you like - also the details of how I tuned it up for a different frequency and load impedance, if anyone's interested.


Cheers, Jim Moritz

73 de M0BMU



--
The Information contained in this E-Mail and any subsequent correspondence
is private and is intended solely for the intended recipient(s).
For those other than the recipient any disclosure, copying, distribution,
or any action taken or omitted to be taken in reliance on such information is
prohibited and may be unlawful.
 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22076 invoked from network); 18 Dec 2000 14:48:55 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 18 Dec 2000 14:48:55 -0000 Received: (qmail 6205 invoked from network); 18 Dec 2000 14:51:21 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Dec 2000 14:51:21 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1481TE-0003HO-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 14:40:56 +0000 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1481TA-0003HJ-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 14:40:52 +0000 Received: from [147.197.200.44] (helo=gemini) by hestia.herts.ac.uk with esmtp (Exim 3.16 #4) id 1481QV-00010n-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 14:38:07 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <13553.200012181440@gemini> From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Mon, 18 Dec 2000 14:44:01 +0000 MIME-Version: 1.0 Content-Type: text/enriched; charset=US-ASCII Content-Transfer-Encoding: 8bit Subject: LF: Guard Circuit In-reply-to: <65AECDF1F89AD411900400508BFC869F0D749C@pdw-mail-1.dera.gov.uk> X-Mailer: Pegasus Mail for Win32 (v3.11) Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear Andy, LF Group,

Aha... wondered why you hadn't mentioned it before - unfortunately, the guard circuit is not shown in the simplified diagram in the LF handbook.

What it is - the tank coil has a link winding on it. This feeds the 'AC' side of a bridge rectifier made up of 4 fast diodes, via a series leakage inductance tuning capacitor. the 'DC' side is connected to some big plastic film reservoir capacitors, and then across the PA supply rail. In fig 3.20 in the handbook, it is assembled on the 3 heatsinks largely concealed by the tank capacitor boards. I think it works like this:

When the tank circuit current (determined by the load
impedance) exceeds a certain ratio with the supply voltage, the
voltage across the link winding forward biases the guard circuit
diodes, and returns power to the DC supply. This effectively
clamps the voltage across the tank circuit, and due to the
impeda nce transforming properties of the LC circuit, appears to the
PA as a non-linear resistance in series with the load which increases rapidly when the output current exceeds a certain point. If you monitor the 'guard', PA input, and supply currents as the load is decreased, the guard and PA currents increase, but the difference between them (ie. the supply current) decreases. With a dead short on the output, the PA current is increased by about 50%, eg, after the unit was re-tuned:

With 50ohm load, 60V supply -
Total PA supply current for 3 PA's = 21.8A = PSU supply current
Total guard current = 0.1A

With short circuit load -
Total PA current = 34.9A
Total guard current = 28.3A
Supply current from PSU = 6.5A

With the full supply voltage and a short circuit load, the PA modules run quite a bit warmer than normal, but not dangerously so, so this is an impressively rugged design!

I can send you a photocopy of the full diagrams if you like - also the details of how I tuned it up for a different frequency and load impedance, if anyone's interested.

Cheers, Jim Moritz
73 de M0BMU

From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8621 invoked from network); 18 Dec 2000 13:52:58 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 18 Dec 2000 13:52:58 -0000 Received: (qmail 2086 invoked from network); 18 Dec 2000 13:55:24 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 18 Dec 2000 13:55:24 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1480cg-00033k-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 13:46:38 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1480cc-00033f-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 13:46:34 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id NAA21586; Mon, 18 Dec 2000 13:46:36 GMT Received: (qmail 27646 invoked from network); 18 Dec 2000 14:41:06 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 18 Dec 2000 14:41:06 -0000 Received: by gauntlet.mail.dera.gov.uk; id OAA17566; Mon, 18 Dec 2000 14:35:27 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma017506; Mon, 18 Dec 00 14:34:54 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Mon, 18 Dec 2000 13:47:16 +0000 Received: by FRN-GOLD-1 with Internet Mail Service (5.0.1460.8) id ; Mon, 18 Dec 2000 13:45:25 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D749C@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: FETs / Overload Protection Date: Mon, 18 Dec 2000 13:45:37 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: What's the Decca guard circuit ? - seems it may be what I'm looking for. Andy > > As far as short-circuit protection for Andy's amplifier goes, the > Decca "guard" circuit does this very nicely - when testing, I ran > mine into a dead short at full power for the best part of an hour > without it getting particularly hot. > -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20112 invoked from network); 18 Dec 2000 12:31:40 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 18 Dec 2000 12:31:40 -0000 Received: (qmail 9999 invoked from network); 18 Dec 2000 12:26:40 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Dec 2000 12:26:40 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147zEo-0002ig-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 12:17:54 +0000 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147zEk-0002ib-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 12:17:51 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.200.44] (helo=gemini) by hestia.herts.ac.uk with esmtp (Exim 3.16 #4) id 147zC4-0005Oh-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 12:15:04 +0000 Message-ID: <6690.200012181217@gemini> From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Mon, 18 Dec 2000 12:20:57 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: FETs / Overload Protection/CFH X-Mailer: Pegasus Mail for Win32 (v3.11) Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear Richard, Andy, LF Group, I once had a similar problem where one FET blew up in an amplifier, and it's replacement immediately failed too. This turned out to be because the other FET, although not catastrophically shorted, no longer had any gain, and the amplifier was trying to operate in a single-ended mode without much success. Replacing both FETs solved the problem; I suppose the moral of the story is, if one FET goes, functionally check the others in the circuit as thorughly as possible. As far as short-circuit protection for Andy's amplifier goes, the Decca "guard" circuit does this very nicely - when testing, I ran mine into a dead short at full power for the best part of an hour without it getting particularly hot. I'm all set up to record CFH, and hopefully get a reasonable calibration of the actual field strength too, but it looks like Murphy has intervened, and it will have to wait.... Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 677 invoked from network); 18 Dec 2000 10:57:49 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 18 Dec 2000 10:57:49 -0000 Received: (qmail 18570 invoked from network); 18 Dec 2000 10:52:52 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 18 Dec 2000 10:52:52 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147xmd-0002Li-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 10:44:43 +0000 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147xmZ-0002Ld-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 10:44:40 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail.cc.kuleuven.ac.be (8.9.3/8.9.0) with SMTP id LAA890416 for ; Mon, 18 Dec 2000 11:44:32 +0100 Message-ID: <3.0.1.16.20001218123624.2e3faad0@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Mon, 18 Dec 2000 12:36:24 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: LF: monitoring CFH In-reply-to: <200012180256_MC2-BEEE-4A22@compuserve.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: CFH has been off air since saturday morning. Unless CFH comes on air again today the monitoring night will have to be suspended. 73, Rik ON7YD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15174 invoked from network); 18 Dec 2000 10:52:48 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 18 Dec 2000 10:52:48 -0000 Received: (qmail 15341 invoked from network); 18 Dec 2000 10:55:14 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Dec 2000 10:55:14 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147xpb-0002Lu-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 10:47:47 +0000 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147xpY-0002Lp-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 10:47:44 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail.cc.kuleuven.ac.be (8.9.3/8.9.0) with SMTP id LAA368108 for ; Mon, 18 Dec 2000 11:47:34 +0100 Message-ID: <3.0.1.16.20001218123926.2ba75a0a@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Mon, 18 Dec 2000 12:39:26 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: CFH recording night : monday 18 december In-reply-to: <20001215.154008.-175243.2.riese-k3djc@juno.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Bob, I am using the version that was available at the time of the eclpise (11 aug 1999), it has no possibilities to adjust the recording speed or put time ticks on the trace. I will check the lastest version to see if any of these features have been added. 73, Rik ON7YD At 15:16 15/12/00 -0500, you wrote: >Hello Rick > >I have Eclipse on my HD but have forgotten the HOW TO > >How is the speed adjusted to record for a long. day / hour time >and is there a way to put time ticks on the tracing > >OR just send me the read me file if there is one > >Bob K3DJC > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8892 invoked from network); 18 Dec 2000 09:41:55 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 18 Dec 2000 09:41:55 -0000 Received: (qmail 11369 invoked from network); 18 Dec 2000 09:45:01 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 18 Dec 2000 09:45:01 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147wjn-00022j-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 09:37:43 +0000 Received: from cmailg5.svr.pol.co.uk ([195.92.195.175]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147wjm-00022e-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 09:37:42 +0000 Received: from modem-38.dunlendings.dialup.pol.co.uk ([62.136.161.166] helo=lvm) by cmailg5.svr.pol.co.uk with smtp (Exim 3.13 #0) id 147wje-0008FL-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 09:37:34 +0000 Message-ID: <001401c068d6$9dab1960$a6a1883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. LF Weekend Report. Date: Mon, 18 Dec 2000 09:39:11 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Steve, Heard a good strong 599 signal from you but had to go out so didnt call. Address for F6BWO:- J.F.Courtot 28 Rue d Alsace 52000 Chaumont Happy Christmas to you and all . Laurie. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17029 invoked from network); 18 Dec 2000 09:17:57 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 18 Dec 2000 09:17:57 -0000 Received: (qmail 4789 invoked from network); 18 Dec 2000 09:20:24 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 18 Dec 2000 09:20:24 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147wLp-0001xM-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 09:12:57 +0000 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147wLo-0001xH-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 09:12:57 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail.cc.kuleuven.ac.be (8.9.3/8.9.0) with SMTP id KAA229190 for ; Mon, 18 Dec 2000 10:12:49 +0100 Message-ID: <3.0.1.16.20001218110441.2f6f1126@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Mon, 18 Dec 2000 11:04:41 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: DX Cluster spots for 10/17Dec at GB7DXM In-reply-to: <200012180256_MC2-BEEE-4A22@compuserve.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: At 02:55 18/12/00 -0500, you wrote: >Hello Alan and all other LF-friends, > >>On Sunday an unusual noise aleted me to a PSK31 signal on 137.6, I swapped >>programs to see Geri just finish working DL7YA on X-mode, and then >continue >>with Wolf DF0WD also cross-mode. Hi Geri, I could copy your 2-way PSK QSO with DF0WD without any trouble, but this should be not surprising since you have solid 579 signal here. DF0WD was also 579 and 100% copy. I have screenshots of your QSO (spectogram), the bandwidth of your PSK signal was about 50Hz (+/- 25Hz from centerfrequency) with some weaker 'sideband' on the range of +/-35 to 45Hz from then centerfrequency. DF0WD had a slighter broader bandwidth of 60Hz (+/-30Hz) but no additional sidebands. I will mail the pictures direct. 73, Rik ON7YD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1542 invoked from network); 18 Dec 2000 09:04:41 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 18 Dec 2000 09:04:41 -0000 Received: (qmail 13174 invoked from network); 18 Dec 2000 09:07:08 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 18 Dec 2000 09:07:08 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147w7i-0001qJ-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 08:58:22 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147w7h-0001qE-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 08:58:21 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id IAA32398; Mon, 18 Dec 2000 08:58:40 GMT Received: (qmail 16772 invoked from network); 18 Dec 2000 09:53:11 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 18 Dec 2000 09:53:11 -0000 Received: by gauntlet.mail.dera.gov.uk; id JAA25285; Mon, 18 Dec 2000 09:47:34 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma025213; Mon, 18 Dec 00 09:47:18 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Mon, 18 Dec 2000 08:59:35 +0000 Received: by FRN-GOLD-1 with Internet Mail Service (5.0.1460.8) id ; Mon, 18 Dec 2000 08:57:44 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D7495@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: other reports Date: Mon, 18 Dec 2000 08:57:56 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Still the same power, but wet surroundings may make the antenna less efficient. The load R has risen so looks valid. The BPSK message is stored in PIC so won't change in the immediate future, I was soak testing the PA and thought you'd prefer a message to a carrier. Keeps within the spirit of the licence ID rules as well. May not persue the 2.5kW full bridge PA design. I had a couple of rather frightening explosions yesterday that were a bit off-putting. NEVER, EVER EVER use a make before break switch for hot switching transformer taps , I hadn't spotted it was Mb4B. That's the trouble with having a very extensive junk box - don't tend to look at components carefully enough. But the present half bridge design will upgrade to 800W reliably with IRF462 devices -cheaper than IRF450. Still need a very fast acting OP short circuit protection circuit. Andy G4JNT > Also Andy is on testing again at 13.00 but the same old > message - could send > out some sort of lowfer news for those without E-mail. You > are S8 with me > Andy, but not sure whether full power, sounded louder when I > first heard > you, but then went off before I could look at the S meter. > John, G4CNN > Reading, IO91ML24 > > > > -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26193 invoked from network); 18 Dec 2000 09:04:02 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 18 Dec 2000 09:04:02 -0000 Received: (qmail 27521 invoked from network); 18 Dec 2000 09:07:07 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Dec 2000 09:07:07 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147w9Y-0001sr-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 09:00:16 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147w9X-0001sm-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 09:00:15 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id JAA00315; Mon, 18 Dec 2000 09:00:43 GMT Received: (qmail 17073 invoked from network); 18 Dec 2000 09:55:14 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 18 Dec 2000 09:55:14 -0000 Received: by gauntlet.mail.dera.gov.uk; id JAA25680; Mon, 18 Dec 2000 09:49:36 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma025632; Mon, 18 Dec 00 09:49:14 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Mon, 18 Dec 2000 09:01:34 +0000 Received: by FRN-GOLD-1 with Internet Mail Service (5.0.1460.8) id ; Mon, 18 Dec 2000 08:59:43 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D7496@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: "LF Group \(E-mail\)" Subject: LF: FW: BPSK beacon test Date: Mon, 18 Dec 2000 08:59:54 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: This was sent direct to me but I feel should be diseminated : Andy G4JNT =========================================== -----Original Message----- From: Alan Melia [mailto:Alan.Melia@btinternet.com] Sent: 2000-12-16 14:41 To: rsgb_lf_group@blacksheep.org Subject: LF: BPSK beacon test Hi Andy, your signal in ID this morning was about 589 here. By tuning my loop to 73kHz and putting it at right angles to you and disconnecting the (136 tuned) wire, I was able to reduce to signal to a barely discernable smudge on Spectrogram (whilst still having to cope with some band noise), when there was no local noise. The BPSK sync'ed and kept in synchronism but with quite a few character corruptions. Installing GRAB 16 9 gave me almost perfect copy. The odd corrupted characters being audibly connected to bursts of local noise. Generally pages of perfect copy even at that S/N level. I was using a VE2IQ Sigma-Delta PCB and AFRICAM. The system maintained sync well despite me not having tweaked the 1.8MHz rock exactly onto frequency (it is 140Hz high). This gives me a lot of confidence that I would have spotted Larry if he had popped out of the noise over the last 3 weeks since I have been using this set-up. I made no adjustments to the RX at all and initial sync came within 4 chars. This system works a lot better than the soundcard set up due I think to more accurate sampling. The BitPhase stays fairly constant though it does switch backwards and forwards by as much as 10%. I must get a JNT version of the card built up! I would think that signal should be copiable well into Europe. Thanks for the test, Cheers de Alan G3NYK JO02PB Alan.Melia@btinternet.com -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26586 invoked from network); 18 Dec 2000 08:02:54 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 18 Dec 2000 08:02:54 -0000 Received: (qmail 8168 invoked from network); 18 Dec 2000 08:05:59 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Dec 2000 08:05:59 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147v9q-0001bF-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 07:56:30 +0000 Received: from hs-img-5.compuserve.com ([149.174.177.154] helo=sphmgaae.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147v9p-0001bA-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 07:56:29 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by sphmgaae.compuserve.com (8.9.3/8.9.3/SUN-1.9) id CAA18608 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 02:56:22 -0500 (EST) Date: Mon, 18 Dec 2000 02:55:45 -0500 From: "Holger 'Geri' Kinzel, DK8KW" Subject: LF: DX Cluster spots for 10/17Dec at GB7DXM To: rsgb_lf_group@blacksheep.org Message-ID: <200012180256_MC2-BEEE-4A22@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Alan and all other LF-friends, >On Sunday an unusual noise aleted me to a PSK31 signal on 137.6, I swapped >programs to see Geri just finish working DL7YA on X-mode, and then continue >with Wolf DF0WD also cross-mode. Thank you for your report on my PSK31 signal and the log you send me. It shows, that also PSK31 is good for long-distance QSOs close to the noise. The QSO with Wolf, DF0WD, by the way, was a full PSK31/PSK31 QSO. Wolf was only running lower power than usual, bus he is one of my nearest neighbors (about 110 km away), so I copied his signal 599. The QSO with DL7YA was PSK31/CW, quite an unusual combination, but we had a lot of fun ... I managed to get my new Hagenuk EX-1001 QRV on 136 in SSB, producing about 1 or 2 Watts from an AD2030 (tnx Rich, OM2TW for the schematics, it woks great, no problem!). To avoid multiples of my audio signal appearing within the band, I uses 135.500 kHz upper sideband and fed a 2000 Hz PSK31 signal into it, ending with a more-or-less clean 137.500 kHz signal. As soon as my PA is back on the air again, I will continue to test various computer generated modes that require SSB. Another thought: we in Germany are allowed to use any mode with a maximum bandwidth of 800Hz. I know that normal 2.1 kHz wide SSB signals havne been transmitted in the early days of LF in the UK. Has anyone ever thought of "Slow-Audio" instead of Slow-CW? My idea is to use an audio editing program such as Cool Edit (available as shareware) and reduce the running speed, so that a normal sharply filtered (the filter is a build-in feature of Cool Edit) 2.4 kHz audio signal is compressed into 800 Hz or an even smaller bandwidth. The same software could then be used to expand the signal again and make it audible. I plan to do some local testing (and yes: I will run those on reduced power using time slots when normally there is no traffic, I do not want to block the entire band with such a funny signal ...) to see what can be achieved ... Best 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5506 invoked from network); 18 Dec 2000 07:36:08 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 18 Dec 2000 07:36:08 -0000 Received: (qmail 19129 invoked from network); 18 Dec 2000 07:39:14 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Dec 2000 07:39:14 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147uiL-0001We-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 07:28:05 +0000 Received: from ds-img-6.compuserve.com ([149.174.206.139] helo=spdmgaaf.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147uiK-0001WZ-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 07:28:04 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by spdmgaaf.compuserve.com (8.9.3/8.9.3/SUN-1.9) id CAA20225 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 02:27:27 -0500 (EST) Date: Mon, 18 Dec 2000 02:27:02 -0500 From: "Holger 'Geri' Kinzel, DK8KW" Subject: LF: OM2TW To: rsgb_lf_group@blacksheep.org Message-ID: <200012180227_MC2-BF02-814C@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Rich, OM2TW wrote: >I was on my LF site during this saturday, but I burn all my mosfets. >Something is wrong with my power amplifier. After a few weeks of problemless >operation, one mosfet has been broken.< ... do those FETs come with a build-in expiry date? I, too, have broken a couple of them during the weekend (well, I must admit, I tried to run the G0MRF PA on a 56 Volt rail instead of the usual 28 Volt I normally use ... what I found out is that the length of sparks that are crerated when the FETs explode is directly proportional to the voltage ... *very* impressive!). When I changed back to 28 Volt (partly with new FETs) and tried to re-adjust the bias, another one burned (... yes, with a smaller spark, as expected). Maybe this is due to mixing IRFP450 with the "new" type IRFP450A (but the data sheets I retrieved from the Internet show absolutely no difference in the performance data ... or did I miss something?). Question: Anyone tried to replace the IRFP450 with the IRFP460? Seems to have only half the RD-on, all other data look quite the same. I found a source where they cost 6.10 DM and I would like to give them a try. Best 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13611 invoked from network); 17 Dec 2000 22:53:57 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 17 Dec 2000 22:53:57 -0000 Received: (qmail 29631 invoked from network); 17 Dec 2000 22:57:01 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 17 Dec 2000 22:57:01 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147meJ-00080l-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 17 Dec 2000 22:51:23 +0000 Received: from [212.159.14.225] (helo=murphys-outbound.servers.plus.net) by post.thorcom.com with smtp (Exim 3.16 #1) id 147meI-00080g-00 for rsgb_lf_group@blacksheep.org; Sun, 17 Dec 2000 22:51:22 +0000 Received: (qmail 23436 invoked from network); 17 Dec 2000 22:50:45 -0000 Received: from unknown (HELO picks) (212.159.52.224) by murphys with SMTP; 17 Dec 2000 22:50:45 -0000 Message-ID: <005c01c0687c$ace69580$3f229fd4@f9.net.uk> From: "Dave" To: "LF Group" Subject: LF: OM2TW Date: Sun, 17 Dec 2000 22:57:04 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear all. >From Dave G3YXM. I pass this message from Richard to the group..... I was on my LF site during this saturday, but I burn all my mosfets. Something is wrong with my power amplifier. After a few weeks of problemless operation, one mosfet has been broken. And when I replaced a new one, burn again. And others too. Please send a message to rsgb_lf_group or inform on your web site, that I'll do my best to be QRV again as soon as possible. I must redesign my power amplifier. I'm home until 2.january 2001 so I have enough time to do it...hi. Best regards and have a nice day...Merry Christmas and Happy New Year 2001 to you and all LF-ers... 73 de Rich OM2TW From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3827 invoked from network); 17 Dec 2000 22:14:19 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 17 Dec 2000 22:14:19 -0000 Received: (qmail 29236 invoked from network); 17 Dec 2000 22:16:45 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 17 Dec 2000 22:16:45 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147lzp-0007qw-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 17 Dec 2000 22:09:33 +0000 Received: from anchor-post-32.mail.demon.net ([194.217.242.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147lzo-0007qr-00 for rsgb_lf_group@blacksheep.org; Sun, 17 Dec 2000 22:09:33 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from alg.demon.co.uk ([194.222.171.80]) by anchor-post-32.mail.demon.net with esmtp (Exim 2.12 #1) id 147lzh-000IEm-0W for rsgb_lf_group@blacksheep.org; Sun, 17 Dec 2000 22:09:25 +0000 Message-ID: <3A3D395A.81101F6F@alg.demon.co.uk> Date: Sun, 17 Dec 2000 22:08:26 +0000 From: "Steve Rawlings" X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win98; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: "LF Group" Subject: LF: Weekend Report: 15-17/12/2000 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi All, A local radio station reported recently that Wales has had rain every day since the 10th September. All this wet and windy weather has resulted in very little opportunity for me to operate on 136 kHz over the past few months. But I did manage to get the balloons flying this weekend, and contacted the following stations on the 20 m balloon-supported vertical, all 2-way normal CW: 15/12/00: G6RO; SM6PXJ; and ON6ND. 17/12/00: G3OLB (a QSO using my loop antenna - it being too misty this morning to risk putting up the balloons); DF0WD; GW4HXO; G3YXM; MM0ALM; G8RW; DK5PT; and F6BWO. It was great to hear old friends again; and to work Dieter DK5PT and Jeff F6BWO for the first time. To be honest, the QSO with F6BWO was a toughy. But I'm reasonably sure that Jeff got my RST 359 report; and I copied my RST 449 OK (before we lost each other in the QSB). Does anyone have an address for Jeff? A Happy Christmas to all, Steve GW4ALG From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15548 invoked from network); 17 Dec 2000 21:25:54 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 17 Dec 2000 21:25:54 -0000 Received: (qmail 284 invoked from network); 17 Dec 2000 21:28:59 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 17 Dec 2000 21:28:59 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147lFV-0007f1-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 17 Dec 2000 21:21:41 +0000 Received: from carbon.btinternet.com ([194.73.73.92]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147lFU-0007ew-00 for rsgb_lf_group@blacksheep.org; Sun, 17 Dec 2000 21:21:40 +0000 Received: from [213.1.86.77] (helo=default) by carbon.btinternet.com with smtp (Exim 3.03 #83) id 147lFN-0000Vj-00 for rsgb_lf_group@blacksheep.org; Sun, 17 Dec 2000 21:21:34 +0000 Message-ID: <001701c0686e$a681f580$4d5601d5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: DX Cluster spots for 10/17Dec at GB7DXM Date: Sun, 17 Dec 2000 21:14:18 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all, there has not been a lot of DX Cluster activity over the last week. I heard good QRS signals on 72kHz from Laurie G3AQC and Jim M0BMU on Friday, but missed Dave G3YXM. On Saturday I did some experiments with Andy's BPSK beacon and received some very good results, with solid copy on a (weakened )signal that I could barely see on spectrogram when the band was quiet. I still had good copy when local noise completely washed out the spectrogram. This was using one of Bill VE2IQ's Sigma-Delta ADC pcbs, and AFRICAM. Very impressive, and obviously a lot of the trouble I had before, with weak signal copy, was due to slight inaccuracies in the soundcard sampling as has been discussed at length. CFH has been a little erratic over the last few days. Either it is being used for experiments or the fault that occurred earlier in the year has not been fully cleared. It was off-air last night and has not been visible so far today (Sunday 2030z) On Sunday an unusual noise aleted me to a PSK31 signal on 137.6, I swapped programs to see Geri just finish working DL7YA on X-mode, and then continue with Wolf DF0WD also cross-mode. Some corruptions due to local noise but generally a good copy from Geri, despite his signal not showing anything on the PSK31 waterfall. Andy was also sending BPSK beacons on 137.79. Later I copied DF8ZR again on DFCW sending CQ (time not noted, but probably about 1430z). At 1440z Gaspard ON4ZK called CQ on QRS as was called by Valerio IK5ZPV, about 20Hz lower in frequency, but unfortunately he didn't see Valerio. You were just about scraping an 'O' here, Valerio ....it does help when know likely call signs(!), but there were only really a couple of dots in doubt. I also heard at some time or other over the weekend (usually on the speaker and about 20 feet from the rig!) MM0ALM, GW4ALG, GW4HXO, G3YXM, G3OLB G3AQC, G8RW. I did not notice the spot on 1800 from Jack, I will have to watch for that....thanks Christer. Cluster spots follow. 136.3 GW4HXO 17-Dec-2000 1216Z fb cpy in JO42, w MM0ALM 136.5 F6BWO 17-Dec-2000 1048Z clg cq 449 in JO42 136.7 DK6NI 17-Dec-2000 1018Z 539 cq 136.8 SM6PXJ 17-Dec-2000 1018Z 429 calling cq 137.6 DK8KW 17-Dec-2000 1011Z nice copy PSK31 Geri 136.5 OH1TN 10-Dec-2000 1848Z Reino clg cq 459 in JO42FD 137.0 DF0WD 10-Dec-2000 1234Z that is CFH USB sub carrier 137.0 CARRIER 10-Dec-2000 1210Z where CFH used to be ? 137.0 CARRIER 8-Dec-2000 2117Z where CFH used to be ? G3NYK de GB7MRS 17-Dec-2000 2005Z > Cheers de Alan G3NYK JO02PB Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2757 invoked from network); 17 Dec 2000 21:15:40 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 17 Dec 2000 21:15:40 -0000 Received: (qmail 26562 invoked from network); 17 Dec 2000 21:18:07 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 17 Dec 2000 21:18:07 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147l5A-0007bQ-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 17 Dec 2000 21:11:00 +0000 Received: from cmailg6.svr.pol.co.uk ([195.92.195.176]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147l59-0007bL-00 for rsgb_lf_group@blacksheep.org; Sun, 17 Dec 2000 21:10:59 +0000 Received: from modem-1.bar-en-danwedh.dialup.pol.co.uk ([62.136.135.129] helo=lvm) by cmailg6.svr.pol.co.uk with smtp (Exim 3.13 #0) id 147l52-0004lz-00 for rsgb_lf_group@blacksheep.org; Sun, 17 Dec 2000 21:10:52 +0000 Message-ID: <000101c0686e$4d755400$8187883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. 73/136 Date: Sun, 17 Dec 2000 21:14:09 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Ko, Many thanks for the report and atachments, looks like a nice clean signal. 73s Laurie. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18315 invoked from network); 17 Dec 2000 20:37:13 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 17 Dec 2000 20:37:13 -0000 Received: (qmail 19806 invoked from network); 17 Dec 2000 20:32:15 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 17 Dec 2000 20:32:15 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147kJQ-0007PJ-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 17 Dec 2000 20:21:40 +0000 Received: from mta06-svc.ntlworld.com ([62.253.162.46]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147kJP-0007PE-00 for rsgb_lf_group@blacksheep.org; Sun, 17 Dec 2000 20:21:39 +0000 Received: from oemcomputer ([62.255.42.1]) by mta06-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001217202130.BPZK15131.mta06-svc.ntlworld.com@oemcomputer> for ; Sun, 17 Dec 2000 20:21:30 +0000 Message-ID: <000201c06866$c358bf20$012aff3e@oemcomputer> From: "Paul & Vanessa" To: rsgb_lf_group@blacksheep.org References: <19748884.976899354858.JavaMail.imail@almond.excite.com> <001c01c06782$9f949c60$4a2378d5@dave> Subject: LF: Seasonal QRN Date: Sun, 17 Dec 2000 20:19:53 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello All, I have today encountered a new source of QRN, which proved to be quite baffling. On Spectrogram, it looked like a series of vertical twisted ropes of varying thickness, then a band of general noise and mush, the whole thing repeating on a 5 minute cycle. Strength was enough to obliterate all but the strongest signals. Rotating the Rx loop did not null out the QRN, suggesting a very local source. Unlike washing machines which can have a very similar effect, the interference persisted for hours. I was stumped until my YL suggested the newly-installed Xmas tree lights! These were of the type that can be set by means of a control box to give a variety of flashing sequences. Sure enough, switching them off killed the QRN, and you get a different pattern for each sequence. Fortunately, on the "steady lights" setting there is no problem, which helps alleviate the QRN from my young daughter when the lights are out! Regards to all Paul G4MD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13721 invoked from network); 17 Dec 2000 19:24:15 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 17 Dec 2000 19:24:15 -0000 Received: (qmail 12917 invoked from network); 17 Dec 2000 19:27:20 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 17 Dec 2000 19:27:20 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147jGJ-0007Bx-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 17 Dec 2000 19:14:23 +0000 X-MSMail-Priority: Normal Received: from mail-5.tiscalinet.it ([195.130.225.151] helo=mail.tiscalinet.it) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147jGF-0007Bs-00 for rsgb_lf_group@blacksheep.org; Sun, 17 Dec 2000 19:14:20 +0000 Received: from orion.pii.net (62.11.54.188) by mail.tiscalinet.it (5.5.015.2) id 3A3C6C460000D200 for rsgb_lf_group@blacksheep.org; Sun, 17 Dec 2000 20:14:09 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from clapo@localhost) by orion.pii.net (8.9.3/8.9.3) id UAA00864 for rsgb_lf_group@blacksheep.org; Sun, 17 Dec 2000 20:18:12 +0100 Message-ID: X-Mailer: XFMail 1.3 [p0] on Linux X-Priority: 3 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-reply-to: <6f.e593faa.27692768@aol.com> Date: Sun, 17 Dec 2000 20:18:11 +0100 (CET) From: "Claudio" To: rsgb_lf_group@blacksheep.org Subject: RE: LF: Re: PSK sidebands with "slow phase changes" Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Wolf and all, I'm not shure about my idea, coming from experience in linear world BPSK modulation, but I suggest to others my think. BPSK modulation consist in multiplying a carrier for +1 or -1, according to data bit to be transmitted (don't forget differential coding...). If the carrier is injected into the first port of a four quadrant analog multiplier end data to be transmitted (a square wave) is injected into the other port but whith rise and falling edge smoothed with a time constant of 3 or 4 or more carrier cycles (trapezoidal wave), the output is a BPSK with slow phase change. My experience can't help about what happen when this signal is passed throu a non linear (hard limiting) stage. 73 de Claudio, ik2pii On 13-Dec-00 DL4YHF@aol.com wrote: > Hello Andy, Steward and others, > > I also think that modifying the PSK generator with a 'slow phase change' as > suggested by Steward (KK7KA) is a very good idea so we don't need linear > transmitters / transverters for this task. I will try to program a kind of > "test generator" (no real PSK modulator) to see what the spectrum looks > like. > Or has someone done this before so we don't have to invent the wheel twice ? > > 73's Wolf (DL4YHF) > ---------------------------------------------------------------------- Claudio Pozzi http://www.qsl.net/ik2pii happy Linux user E-Mail: Claudio Date: 17-Dec-00 Time: 20:04:41 This message was sent by XFMail ---------------------------------------------------------------------- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19584 invoked from network); 17 Dec 2000 10:13:41 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 17 Dec 2000 10:13:41 -0000 Received: (qmail 29199 invoked from network); 17 Dec 2000 10:08:45 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 17 Dec 2000 10:08:45 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147abR-0005Jb-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 17 Dec 2000 09:59:37 +0000 Received: from fep03.swip.net ([130.244.199.131] helo=fep03-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147abQ-0005JW-00 for rsgb_lf_group@blacksheep.org; Sun, 17 Dec 2000 09:59:36 +0000 Received: from W98 ([212.151.9.165]) by fep03-svc.swip.net (InterMail vM.5.01.01.01 201-252-104) with SMTP id <20001217095928.SMAP7085.fep03-svc.swip.net@W98> for ; Sun, 17 Dec 2000 10:59:28 +0100 Message-ID: <003601c0680f$e32c3fe0$a50997d4@W98.swipnet.se> From: "Christer Andersson" To: "RSGB LF Group" Subject: LF: VE1ZZ on 136 Date: Sun, 17 Dec 2000 10:58:19 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Found this on the OH2AQ DX cluster VE1ZZ 1800.0 VE1ZZ 136.5 01z 02z 03z 1/2hr qrss. 0047 17 Dec /sm6pxj From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11782 invoked from network); 16 Dec 2000 21:39:04 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 16 Dec 2000 21:39:04 -0000 Received: (qmail 3231 invoked from network); 16 Dec 2000 21:41:27 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 16 Dec 2000 21:41:27 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147Oxg-0002dB-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Dec 2000 21:33:48 +0000 Received: from smtp06.wxs.nl ([195.121.6.58]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147Oxe-0002d6-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 21:33:46 +0000 Received: from default ([195.121.218.243]) by smtp06.wxs.nl (Netscape Messaging Server 4.05) with SMTP id G5OJVB01.LRL for ; Sat, 16 Dec 2000 22:33:11 +0100 Message-ID: <001401c067a7$a85647c0$f3da79c3@default> From: "ko versteeg" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Re. 73/136 etc Date: Sat, 16 Dec 2000 22:31:25 +0100 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="------------030209030908080502000105" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.1 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: This is a multi-part message in MIME format. --------------030209030908080502000105 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: 8bit
 
-----Original Message-----
From: LAWRENCE MAYHEAD <LAURIE@g3aqc.freeserve.co.uk>
To: rsgb lf group <rsgb_lf_group@blacksheep.org>
Date: Saturday, December 16, 2000 19:55 PM
Subject: LF: Re. 73/136 etc

DX reports would be appreciated.
73s to all. Laurie
-----------------------
Laurie..
No DX but you're 559 in JO22KF.
73 and Good Luck
Ko, NL9222.
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OjnjmN6KKB1IBErzA2pT1FFFaQzltUkzvSSSdU70UVL0MD1gc02vVbCnoSZ85/aiirAo3IHk ajUVkD3miipeADEQRsaidXQCiioqVEk+QqC0g/KiirUOONYMUkx8uIooq0HnUqSSAOsiiiop 1Yi0U6H+tVyNPFFFWoaJHNFkHXsSDRRT3AxBM79CT+vekIIJ3+dFFKIB3oJO4PnRRWdVOqWJ IqJ3nqRRRTQDcj0oHin5UUVUQeK+5fZz/wBBsu/9z/7Hoorx+3jUaaiiivBRRRRQf//Z --------------030209030908080502000105-- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26107 invoked from network); 16 Dec 2000 21:22:55 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 16 Dec 2000 21:22:55 -0000 Received: (qmail 9502 invoked from network); 16 Dec 2000 21:25:20 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 16 Dec 2000 21:25:20 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147Oiu-0002Xa-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Dec 2000 21:18:32 +0000 Received: from mail3.svr.pol.co.uk ([195.92.193.19]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147Oit-0002XV-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 21:18:31 +0000 Received: from modem-53.angrim.dialup.pol.co.uk ([62.136.113.53] helo=lvm) by mail3.svr.pol.co.uk with smtp (Exim 3.13 #0) id 147Oim-0000TE-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 21:18:24 +0000 Message-ID: <000701c067a6$2f7fa360$3571883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. The old LF source book. Date: Sat, 16 Dec 2000 21:20:48 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
I would never have got started on LF without it. 
Thanks Peter. 73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7940 invoked from network); 16 Dec 2000 20:32:01 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 16 Dec 2000 20:32:01 -0000 Received: (qmail 27863 invoked from network); 16 Dec 2000 20:34:25 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 16 Dec 2000 20:34:25 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147NvK-0002Kl-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Dec 2000 20:27:18 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from [194.200.20.13] (helo=mailhost.netscapeonline.co.uk) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147NvJ-0002KF-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 20:27:18 +0000 Received: from userbw42.netscapeonline.co.uk ([62.125.146.223] helo=netscapeonline.co.uk) by mailhost.netscapeonline.co.uk with esmtp (Exim 3.02 #1) id 147NsD-0002dH-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 20:24:05 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A3BD267.223A1A4B@netscapeonline.co.uk> Date: Sat, 16 Dec 2000 20:36:55 +0000 From: "g3ldo" Organization: Netscape Online member X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win98; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: Re: LF Loops and LF Source Book References: <19748884.976899354858.JavaMail.imail@almond.excite.com> <001c01c06782$9f949c60$4a2378d5@dave> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dave Sergeant wrote: > Thanks John for the interesting technical email on your receive loops. I built the 'LNP loop and found the balance difficult to achieve without a good deal of component value fudging. The performance was poor and the signals lacked 'presence'. I disconnected the amplifier and put a couple of additional turns to form a pick-up loop, which was then fed into a Datung converter, which worked much better. I will implement a couple of suggestions, on this reflector, to improving the amplifier and report back. > It is refreshing to note several ideas coming from the earlier issue > of the source book. Although it was suggested this could be thrown > away now we have the smarter looking new one, quite a few ideas are > only in that one, eg transmit loops, SWR bridges, GDOs etc. The > information in it certainly has not dated, even though newer > techniques and practices have come along since. When I compiled the Low Frequency Handbook I made a point not trying to include information which was already in the LF Source Book. The main exception was Bill Bowers contribution on coil design. I thank you all for your kind comments and update information on these books. Peter, G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4412 invoked from network); 16 Dec 2000 19:23:46 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 16 Dec 2000 19:23:46 -0000 Received: (qmail 3334 invoked from network); 16 Dec 2000 19:18:50 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 16 Dec 2000 19:18:50 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147MiG-00020A-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Dec 2000 19:09:44 +0000 Received: from mail4.svr.pol.co.uk ([195.92.193.211]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147MiF-000205-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 19:09:43 +0000 Received: from modem-31.dunlendings.dialup.pol.co.uk ([62.136.161.159] helo=lvm) by mail4.svr.pol.co.uk with smtp (Exim 3.13 #0) id 147Mi8-0005PX-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 19:09:37 +0000 Message-ID: <000201c06794$314685e0$9fa1883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. 73/136 Date: Sat, 16 Dec 2000 19:11:58 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Whoops just had a look at the band and SXV is all over the 135700-135800
segment.So will QSY to 135973. Still no sign of CFH.! 73s Laurie
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28899 invoked from network); 16 Dec 2000 19:20:57 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 16 Dec 2000 19:20:57 -0000 Received: (qmail 8203 invoked from network); 16 Dec 2000 19:23:22 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 16 Dec 2000 19:23:22 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147MlX-000211-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Dec 2000 19:13:07 +0000 Received: from smtp.bellnexxia.net ([209.226.175.26] helo=tomts6-srv.bellnexxia.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147MlW-00020w-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 19:13:06 +0000 Received: from server1 ([216.209.138.173]) by tomts6-srv.bellnexxia.net (InterMail vM.4.01.03.00 201-229-121) with SMTP id <20001216191228.XJHL16490.tomts6-srv.bellnexxia.net@server1>; Sat, 16 Dec 2000 14:12:28 -0500 Message-ID: <003501c06793$a7091e60$0a00a8c0@ThreeLakes.ca> From: "Larry Kayser" To: rsgb_lf_group@blacksheep.org, g3ldo@netscapeonline.co.uk References: <12515246.976972979197.JavaMail.imail@almond.excite.com> <3A3BAE75.4DE10CBF@netscapeonline.co.uk> Subject: LF: Re: Re: the old LF source book Date: Sat, 16 Dec 2000 14:08:58 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Peter, G3LDO I am not sure who is the source of offensive behaviour, I do not see some of the emails on this reflector (you can guess were they go automagically), but your LF source book was and remains a great reference on LF activity and is much appreciated here and I am sure by many others in the LF world. I have not seen your latest work, might find a copy at a hamfest next year, but I am sure it will build on your past success. >From here, just a simple Thank You, my best to you and yours for the coming Christmas Season and the New Year to come along so very soon. Larry VA3LK From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20744 invoked from network); 16 Dec 2000 18:41:59 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 16 Dec 2000 18:41:59 -0000 Received: (qmail 15220 invoked from network); 16 Dec 2000 18:44:25 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 16 Dec 2000 18:44:25 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147MEK-0001qF-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Dec 2000 18:38:48 +0000 Received: from mail11.svr.pol.co.uk ([195.92.193.23]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147MEJ-0001qA-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 18:38:47 +0000 Received: from modem-3.aradan.dialup.pol.co.uk ([62.136.117.131] helo=lvm) by mail11.svr.pol.co.uk with smtp (Exim 3.13 #0) id 147MEC-0001Nm-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 18:38:40 +0000 Message-ID: <000701c0678f$defd4b60$8375883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. 73/136 etc Date: Sat, 16 Dec 2000 18:41:22 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Thanks Jim for my first 2way contact on 73KHz,looks like I need to improve the Rx
side of things, a few more signals would be a help Hi.
Condx on 136 appear to be good at present (CFH let me down last night went QRT!) Another burst of Sun rubbish promised for the weekend so will transmit tonight hoping someone will be listening.I will use the old Transatlantic band,starting at 20:00 UTC Freq 135723 QRSS. Power 800W to a 15M high vert.
ant. with 150m top load. Estimated ERP 1W.  DX reports would be appreciated.
73s to all. Laurie
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25593 invoked from network); 16 Dec 2000 18:29:34 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 16 Dec 2000 18:29:34 -0000 Received: (qmail 29613 invoked from network); 16 Dec 2000 18:32:38 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 16 Dec 2000 18:32:38 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147M2A-0001oY-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Dec 2000 18:26:14 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from [194.200.20.13] (helo=mailhost.netscapeonline.co.uk) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147M2A-0001oT-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 18:26:14 +0000 Received: from userak58.netscapeonline.co.uk ([62.125.132.33] helo=netscapeonline.co.uk) by mailhost.netscapeonline.co.uk with esmtp (Exim 3.02 #1) id 147Lz3-0006jJ-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 18:23:02 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A3BAE75.4DE10CBF@netscapeonline.co.uk> Date: Sat, 16 Dec 2000 18:03:33 +0000 From: "g3ldo" Organization: Netscape Online member X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win98; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: Re: the old LF source book References: <12515246.976972979197.JavaMail.imail@almond.excite.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: john sexton wrote: > This guy really is rude! > Doesn't he understand how offensive these sort of remarks are? Hi John, Unfortunately we, as a group, have had this problem for some time. However, it is not unique to LF - there are instances of offensive behaviour on the VHF/UHF repeaters. The advice given to us regarding repeater pests is to completely ignore them and, in our case, delete the offensive files. Thank you for your comments on the LF Source Book Regards, Peter, G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14009 invoked from network); 16 Dec 2000 17:12:48 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 16 Dec 2000 17:12:48 -0000 Received: (qmail 7104 invoked from network); 16 Dec 2000 17:15:50 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 16 Dec 2000 17:15:50 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147KpB-0001Tq-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Dec 2000 17:08:45 +0000 Received: from mta01.talk21.com ([62.172.192.171] helo=t21mta01-app.talk21.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147KpA-0001Ti-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 17:08:44 +0000 Received: from dave ([213.120.35.74]) by t21mta01-app.talk21.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001216170652.FKWY19366.t21mta01-app.talk21.com@dave> for ; Sat, 16 Dec 2000 17:06:52 +0000 Message-ID: <001c01c06782$9f949c60$4a2378d5@dave> From: "Dave Sergeant" To: rsgb_lf_group@blacksheep.org References: <19748884.976899354858.JavaMail.imail@almond.excite.com> Subject: LF: Re: Re: Loops, Pre-amps and Imps Date: Sat, 16 Dec 2000 16:59:44 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: >From Dave G3YMC John Sexton wrote: >I decided to try another pre-amp, and built a design by Lloyd Butler, >(VK5BR) from the old LF source book using a single op-amp the OPA111AM. I >chose this design because a couple of years ago Thanks John for the interesting technical email on your receive loops. I would confirm that the Burr Brown OPA111 is not necessarily a good choice for 136kHz loop preamps. This device (I have the datasheet) is really designed for precision data aquisition applications, and although listed as a low noise op amp, it has a unity gain bandwidth of typically 2MHz and an open loop gain at 136kHz of around 25dB. Yes it will work, but there are proably better ways of doing the job we want. >However I soon noticed a "new" RTTY station on 136.25 and realised that it must be an Inter Modulation Product, >but where and from what? Nearly all cases of reported intermodulation products in receivers can be put down to inadequate front end selectivity. In my transverter (which uses an E310 or similar FET input amp) I have two parallel tuned circuits tuned at 136 - the first at the antenna front end, and the second at the drain of the FET. One of these is fixed at 136, which presents problems of course if I want to listen elsewhere, but this gives me a bandwidth of a few kHz and I have had no problem whatsoever with intermods. G3LNPs technique of using a second nulling loop is probably unnecessary if proper attention is given to the front end selectivity. It is refreshing to note several ideas coming from the earlier issue of the source book. Although it was suggested this could be thrown away now we have the smarter looking new one, quite a few ideas are only in that one, eg transmit loops, SWR bridges, GDOs etc. The information in it certainly has not dated, even though newer techniques and practices have come along since. Cheers Dave G3YMC sergeantd@compuserve.com dsergeant@iee.org http://ourworld.compuserve.com/homepages/sergeantd From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12650 invoked from network); 16 Dec 2000 16:36:20 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 16 Dec 2000 16:36:20 -0000 Received: (qmail 18712 invoked from network); 16 Dec 2000 16:31:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 16 Dec 2000 16:31:23 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147K6X-0001Bz-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Dec 2000 16:22:37 +0000 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147K6W-0001Bu-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 16:22:36 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.200.44] (helo=gemini) by hestia.herts.ac.uk with esmtp (Exim 3.16 #4) id 147K3t-0000pW-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 16:19:53 +0000 Message-ID: <9066.200012161622@gemini> From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Sat, 16 Dec 2000 16:25:44 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: Loop Antennas X-Mailer: Pegasus Mail for Win32 (v3.11) Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear John and LF group, I was interested in G4CNN's experiments with loop antennas - in response to some of the issues he raises here is another long E- mail - please delete now if the subject bores you: Fets have notoriously loose tolerance on their biasing parameters - for a one-off design, the easiest way to get the bias current you want is to "select on test" the source bias resistors. A possible problem with G3LNP's preamp is that there are no source bias resistors, which means that the drain resistors must be varied to obtain the correct bias voltage, which also directly varies the gain, and also means the FETs need to be reasonably matched. But so long as both have reasonably similar voltages on the drains, they probably are. Then again, you could find some FETs with the correct Idss, which is what John has effectively done. On the plus side, it also runs the FET's at the highest practical drain current, which usually gives the best noise and dynamic range. The J310's have better low noise performance, higher operating current, but not much reduced spread in parameters compared to the 2N3819 (Idss 24-60mA, against 2 - 20mA). You would want to use source bias resistors with the J310. A more significant flaw in the 'LNP preamp as shown in the LF handbook is that, unless the quiescent drain voltages of the FETs are matched to within less than 60mV (unlikely), one of the bipolar output transistors will be cut off all the time, due to the "differential amplifier" biasing connection of TR3 and TR4. This would effectively turn it into a single-ended preamp. Again, this could be got round by using seperate emitter bias resistors & capacitors, and separating the transformer windings. Or you could lose them altogether, and redesign the transformer to match the FET outputs directly to the RX input. It is certainly possible to tune loops using a transformer to 'step up' the capacitance of the tuning capacitor. At University of Hertfordshire, we designed some loops for EMC measurements, one using a loop of 40-or so uH to tune 100kHz to 1.6MHz in octave bands, using a 365+365pF variable C by doing just this. The problem from the LF amateur point of view is that it is difficult to make transformers with very low losses that would not degrade the overall Q, especially after you had gone to all the trouble of using litz wire. This was not an issue with the UofH loops, which needed a fairly wide bandwidth. Discrete JFETs have lower noises than FET op-amps - the relevant paramenter is the eqivalent input noise voltage , "e suscript n", in nanovolts per root hertz (noise current from most FETs is too low to make much difference most of the time but maybe does for the highest Q loops). Eg - OPA111 6nV/root Hz, 2n3819 about 4, J310 1nV/ root Hz. Op - amps have the benefit of high loop gain, which means less distortion, if the gain-bandwidth product is large enough. Gain bandwidth product roughly means - the gain of the closed loop amplifier multiplied by its 3dB cut-off frequency is a constant. for the OPA111 this is about 2MHz, so for a unity gain circuit, bandwidth should also be roughly 2MHz. High voltage gain is not needed; going from 100's of kilohms impedance at the loop terminals to 50 ohms at the RX results in enormous power gain even with a voltage gain of 1. However, if the RX input actually is 50ohms, many op-amps would struggle to drive it. Similarly, very low noise is not required for High-Q loops. At 136kHz, 3mH inductance, and a Q of a few hundred, the equivalent parallel resistance of the loop will be several hundred k. The thermal noise voltage across a 500k resistor is about 90nV/root Hz, higher than most FETs and op-amps, so amplifier voltage noise is not that critical. However, this high source impedance might mean that the current noise is significant, but I haven't worked it out. I suspect cheaper FET-input op-amps than the OPA111, which is now quite an old & expensive design, would work just as well. I have tried a different aproach to an LF receiving loop, which has some atractive features. Basically, I am using a single turn loop with 3m sides. This is connected to the shack via a 1:1 balun transformer and about 20m of RG58 coax. This lot has an equivalent inductance of some 10's of uH at LF. At the shack end it is resonated with a series inductor of a few mH , and parallel 500p + 500p variable C, connected to the gate of a single-ended FET preamp. This gives the big advantage of being tuned over a wide range from inside the shack, using different series inductors. The tuning circuit is a long way from optimum from the noise point of view, but the large area of the loop means external noise still dominates, even under quiet band conditions. You get a good null, and it is unaffected by rain, being relatively low impedance. The obvious problem is that it is bigger than the normal loops - mine uses a 5m wooden pole, with 2.4m bamboo cross-arms. However, with some optimisation, It could well get quite a bit smaller. It has been very useful for nulling Rugby on 73k (although it also nulled G3YXM very effectively last night!). Hope this is of some interest, Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10582 invoked from network); 16 Dec 2000 15:01:40 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 16 Dec 2000 15:01:40 -0000 Received: (qmail 6478 invoked from network); 16 Dec 2000 15:04:05 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 16 Dec 2000 15:04:05 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147InF-0000tm-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Dec 2000 14:58:37 +0000 Received: from smtp-out2.bellatlantic.net ([199.45.40.88]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147In9-0000th-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 14:58:36 +0000 Received: from bellatlantic.net (client-151-200-117-48.bellatlantic.net [151.200.117.48]) by smtp-out2.bellatlantic.net (8.9.1/8.9.1) with ESMTP id JAA24291; Sat, 16 Dec 2000 09:57:37 -0500 (EST) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A3B82DD.549EB597@bellatlantic.net> Date: Sat, 16 Dec 2000 09:57:34 -0500 From: "Andre' Kesteloot" X-Mailer: Mozilla 4.7 [en]C-CCK-MCD NSCPCD47 (WinNT; I) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re: the old LF source book References: <12515246.976972979197.JavaMail.imail@almond.excite.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: john sexton wrote: > This guy really is rude! > Doesn't he understand how offensive these sort of remarks are? > John, G4CNN the question is not so much whether one understands one is rude or not, but whether one _cares_ or not about offending others... Best Seasons greetings to all :-) Andre' N4ICK From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28480 invoked from network); 16 Dec 2000 14:49:22 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 16 Dec 2000 14:49:22 -0000 Received: (qmail 20968 invoked from network); 16 Dec 2000 14:51:47 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 16 Dec 2000 14:51:47 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147Ibh-0000rT-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Dec 2000 14:46:41 +0000 Received: from carbon.btinternet.com ([194.73.73.92]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147Ibg-0000rO-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 14:46:40 +0000 Received: from [62.7.34.244] (helo=default) by carbon.btinternet.com with smtp (Exim 3.03 #83) id 147IbW-00035S-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 14:46:30 +0000 Message-ID: <000a01c0676e$488345c0$f422073e@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: BPSK beacon test Date: Sat, 16 Dec 2000 14:40:43 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Andy, your signal in ID this morning was about 589 here. By tuning my loop to 73kHz and putting it at right angles to you and disconnecting the (136 tuned) wire, I was able to reduce to signal to a barely discernable smudge on Spectrogram (whilst still having to cope with some band noise), when there was no local noise. The BPSK sync'ed and kept in synchronism but with quite a few character corruptions. Installing GRAB 16 9 gave me almost perfect copy. The odd corrupted characters being audibly connected to bursts of local noise. Generally pages of perfect copy even at that S/N level. I was using a VE2IQ Sigma-Delta PCB and AFRICAM. The system maintained sync well despite me not having tweaked the 1.8MHz rock exactly onto frequency (it is 140Hz high). This gives me a lot of confidence that I would have spotted Larry if he had popped out of the noise over the last 3 weeks since I have been using this set-up. I made no adjustments to the RX at all and initial sync came within 4 chars. This system works a lot better than the soundcard set up due I think to more accurate sampling. The BitPhase stays fairly constant though it does switch backwards and forwards by as much as 10%. I must get a JNT version of the card built up! I would think that signal should be copiable well into Europe. Thanks for the test, Cheers de Alan G3NYK JO02PB Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27563 invoked from network); 16 Dec 2000 14:48:26 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 16 Dec 2000 14:48:26 -0000 Received: (qmail 4230 invoked from network); 16 Dec 2000 14:50:51 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 16 Dec 2000 14:50:51 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147Iaa-0000rK-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Dec 2000 14:45:32 +0000 Received: from fep02.swip.net ([130.244.199.130] helo=fep02-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147IaZ-0000rF-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 14:45:31 +0000 Received: from W98 ([212.151.108.100]) by fep02-svc.swip.net (InterMail vM.5.01.01.01 201-252-104) with SMTP id <20001216144518.QUNA21989.fep02-svc.swip.net@W98> for ; Sat, 16 Dec 2000 15:45:18 +0100 Message-ID: <003201c0676e$aa283880$646c97d4@W98.swipnet.se> From: "Christer Andersson" To: rsgb_lf_group@blacksheep.org Subject: LF: SV: F6BWO Date: Sat, 16 Dec 2000 15:44:15 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: >Good copy 549 from F6BWO calling CQ underneath SM6PXJ and ON6ND 10.45 >Saturday morning. Sorry if I caused unintentional QRM this morning. Heard other stations working F6BWO afterwards be he was not detectable even on Spectrogram at this end. 73 sm6pxj From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23232 invoked from network); 16 Dec 2000 14:46:14 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 16 Dec 2000 14:46:14 -0000 Received: (qmail 2342 invoked from network); 16 Dec 2000 14:49:17 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 16 Dec 2000 14:49:17 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147IXv-0000r9-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Dec 2000 14:42:47 +0000 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147IXu-0000r4-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 14:42:46 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.200.44] (helo=gemini) by hestia.herts.ac.uk with esmtp (Exim 3.16 #4) id 147IVB-0000MS-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 14:39:57 +0000 Message-ID: <7169.200012161442@gemini> From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Sat, 16 Dec 2000 14:45:49 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: 73kHz / Loops X-Mailer: Pegasus Mail for Win32 (v3.11) Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF Group, Nice to see a new face on 73kHz - I was very pleased to work G3AQC for his first 2-way QSO on 73kHz. It was a bit "asymetrical", I gave Laurie a 589 report, but had to resort to QRSS to send it to him! Also worked G3YXM, who was 569 with me, but, being close to Rugby, Dave gave me an exotic RST389. This seems to be fairly typical behaviour for 73kHz, which is an interesting if sometimes frustrating band. Also, thanks to PA0SE, G3NYK, and G4CNN for the reception reports. It was not possible for me to be QRV this morning, but I will try again next weekend for cross-band QSOs if anyone is interested. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7969 invoked from network); 16 Dec 2000 13:33:47 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 16 Dec 2000 13:33:47 -0000 Received: (qmail 15942 invoked from network); 16 Dec 2000 13:28:50 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 16 Dec 2000 13:28:50 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147HJJ-0000a3-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Dec 2000 13:23:37 +0000 Received: from fortune-rwcmta.excite.com ([198.3.99.203] helo=fortune.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147HJI-0000Zv-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 13:23:36 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by fortune.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001216132259.ZOPC9490.fortune.excite.com@almond.excite.com> for ; Sat, 16 Dec 2000 05:22:59 -0800 Message-ID: <12515246.976972979197.JavaMail.imail@almond.excite.com> Date: Sat, 16 Dec 2000 05:22:57 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re: the old LF source book MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 213.104.148.42 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: This guy really is rude! Doesn't he understand how offensive these sort of remarks are? John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7036 invoked from network); 16 Dec 2000 13:32:46 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 16 Dec 2000 13:32:46 -0000 Received: (qmail 2672 invoked from network); 16 Dec 2000 13:27:50 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 16 Dec 2000 13:27:50 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147HGc-0000Zq-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Dec 2000 13:20:50 +0000 Received: from gigi.excite.com ([199.172.152.110]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147HGb-0000Zl-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 13:20:49 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by gigi.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001216132011.ZKUS9407.gigi.excite.com@almond.excite.com> for ; Sat, 16 Dec 2000 05:20:11 -0800 Message-ID: <7288337.976972811759.JavaMail.imail@almond.excite.com> Date: Sat, 16 Dec 2000 05:20:09 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: F6BWO and other reports MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 213.104.148.42 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi All, Heard Jeff, F6BWO, 449 this morning in QSO with Peter G3LDO who is now 15 over 9 with me. Also Andy is on testing again at 13.00 but the same old message - could send out some sort of lowfer news for those without E-mail. You are S8 with me Andy, but not sure whether full power, sounded louder when I first heard you, but then went off before I could look at the S meter. John, G4CNN Reading, IO91ML24 _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18245 invoked from network); 16 Dec 2000 12:31:05 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 16 Dec 2000 12:31:05 -0000 Received: (qmail 6399 invoked from network); 16 Dec 2000 12:34:05 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 16 Dec 2000 12:34:05 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147GQU-0000Nq-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Dec 2000 12:26:58 +0000 Received: from imo-r12.mx.aol.com ([152.163.225.66] helo=imo-r12.mail.aol.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147GQT-0000Nl-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 12:26:57 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from G0MRF@aol.com by imo-r12.mx.aol.com (mail_out_v28.34.) id l.8e.e80dde7 (4263) for ; Sat, 16 Dec 2000 07:26:12 -0500 (EST) From: G0MRF@aol.com Message-ID: <8e.e80dde7.276cb964@aol.com> Date: Sat, 16 Dec 2000 07:26:12 EST Subject: LF: VXO Crystals To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Windows AOL sub 105 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: For general info: I have just received a batch of crystals suitable for a simple VXO for 136k. They are HC49U and are on 8.000 and 8.275MHz. Circuit details are available on the web site and in the RSGB LF Experimenter's book. The crystals were the final components to be delivered for the 300W class D transmitter, so that is now also available as a kit. www.g0mrf.freeserve.co.uk/kits.htm 73 David From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5600 invoked from network); 16 Dec 2000 11:05:09 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 16 Dec 2000 11:05:09 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 11065 invoked from network); 16 Dec 2000 11:00:13 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 16 Dec 2000 11:00:13 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147EyU-00005D-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Dec 2000 10:53:58 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from finch-post-10.mail.demon.net ([194.217.242.38]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147EyT-000058-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 10:53:57 +0000 Received: from telemetry.demon.co.uk ([194.222.19.114]) by finch-post-10.mail.demon.net with smtp (Exim 2.12 #1) id 147EyM-0009V6-0A for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 10:53:51 +0000 Message-ID: Date: Sat, 16 Dec 2000 10:52:47 +0000 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: LF: F6BWO MIME-Version: 1.0 X-Mailer: Turnpike (32) Trial Version 3.05 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Good copy 549 from F6BWO calling CQ underneath SM6PXJ and ON6ND 10.45 Saturday morning. 73, Tom G3OLB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14804 invoked from network); 16 Dec 2000 10:40:06 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 16 Dec 2000 10:40:06 -0000 Received: (qmail 4118 invoked from network); 16 Dec 2000 10:35:10 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 16 Dec 2000 10:35:10 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147EWP-0008V8-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Dec 2000 10:24:57 +0000 Received: from fortune-rwcmta.excite.com ([198.3.99.203] helo=fortune.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147EWO-0008V3-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 10:24:57 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from bernie.excite.com ([199.172.148.157]) by fortune.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001216102428.ZETE9490.fortune.excite.com@bernie.excite.com> for ; Sat, 16 Dec 2000 02:24:28 -0800 Message-ID: <22045547.976962268511.JavaMail.imail@bernie.excite.com> Date: Sat, 16 Dec 2000 02:24:26 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: LF: M0BMU 73kHz report MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 213.104.158.117 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Jim, Really strong and clear signal here S8/9 with new loop. Also saw Dave YXM, who was about 12 dB weaker, but easy copy OOO in QRSS. This part of the band was really quiet here. Sorry Laurie missed you I guess, didn't listen/watch at the relevant time. Next project to build a decent Field strength meter, so that I can give more useful reports. 73 John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1423 invoked from network); 16 Dec 2000 10:38:48 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 16 Dec 2000 10:38:48 -0000 Received: (qmail 12976 invoked from network); 16 Dec 2000 10:41:13 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 16 Dec 2000 10:41:13 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147Ecg-00001I-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Dec 2000 10:31:26 +0000 Received: from mail1.svr.pol.co.uk ([195.92.193.18]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147Ece-00001D-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 10:31:25 +0000 Received: from modem-40.californium.dialup.pol.co.uk ([62.136.68.168] helo=default) by mail1.svr.pol.co.uk with smtp (Exim 3.13 #0) id 147EcY-0002eL-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 10:31:18 +0000 Message-ID: <000401c0674a$9d629ba0$a844883e@default> From: "MAL HAMILTON" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: the old LF source book Date: Sat, 16 Dec 2000 10:25:12 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: -----Original Message----- From: Peter Cleall To: rsgb_lf_group@blacksheep.org Date: 15 December 2000 11:36 Subject: LF: the old LF source book > > >>Sounds like the LF source book of a couple of years ago. Most of the >>information was obsolete and bore no resemblence to the achievements taking >>place when it was published. I think 23 km was the record when in fact I >had >>worked OH1TN and got 579 on normal morse when it went to print. >>G3KEV > > >I do not understand why you have to be so rude about the source book. When >it was published I believe it was a genuine attempt to get the best >information that was available, and easily reproducible, quickly out to the >interested beginners. I for one have constantly referred to various sections >of it, often going back and picking up a few more nuggets by re reading. Keep reading your comic and enjoy the Noddy BK cartoons. Can't say I have heard your signal on 136 !!!!!!!!!!!!!! G3KEV >Surely that is the purpose of a source book. > >Records by their very nature are transient things which most of us >appreciate, will, at some stage, be overtaken. The technical content however >can be reused. As shown by our use of of documentation of LF work done in >the 1920's to 1950's. > > >peter G8AFN > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7608 invoked from network); 16 Dec 2000 00:52:08 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 16 Dec 2000 00:52:08 -0000 Received: (qmail 9645 invoked from network); 16 Dec 2000 00:54:34 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 16 Dec 2000 00:54:34 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1475Vx-0006fX-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Dec 2000 00:47:53 +0000 Received: from mta2-rme.xtra.co.nz ([203.96.92.3]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1475Vw-0006fS-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Dec 2000 00:47:52 +0000 Received: from xtr743187 ([202.27.181.70]) by mta2-rme.xtra.co.nz with SMTP id <20001216004712.QTEL8225897.mta2-rme.xtra.co.nz@xtr743187> for ; Sat, 16 Dec 2000 13:47:12 +1300 Message-ID: <001d01c066fa$52d323c0$46b51bca@xtr743187> From: "Vernall" To: rsgb_lf_group@blacksheep.org References: <001501c066e0$1a140140$7ce67ad5@default> Subject: LF: Re: Loops preamps and imps Date: Sat, 16 Dec 2000 13:47:22 +1300 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2919.6600 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Regarding selection of JFETs for active antennas, dynamic range tests done some time back by Andrew ZL2BBJ on a selection of JFETs showed that the J310 was generally the best choice. Optimum current around 10 mA. In some cases two J310s connected in parallel gave less intermod than one alone. 73, Bob From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10796 invoked from network); 15 Dec 2000 23:46:41 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 15 Dec 2000 23:46:41 -0000 Received: (qmail 897 invoked from network); 15 Dec 2000 23:41:46 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 15 Dec 2000 23:41:46 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1474Ja-0006LI-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 23:31:02 +0000 Received: from mail3.svr.pol.co.uk ([195.92.193.19]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1474JZ-0006LD-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 23:31:01 +0000 Received: from modem-16.azaghal.dialup.pol.co.uk ([62.136.131.144] helo=lvm) by mail3.svr.pol.co.uk with smtp (Exim 3.13 #0) id 1474JS-0000KG-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 23:30:55 +0000 Message-ID: <000701c066ef$87a30a80$9083883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re.73KHz rpt. Date: Fri, 15 Dec 2000 23:33:30 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Hi Alan,
Yes I was on 71.69 CW (later DFCW)
I worked M0BMU on QRSS with nice 000 signal although only just audible,mebbe need to improve my Rx capability.Saw G3YXM also very good signal.Thanks for the report Alan.CFH going strong at the moment also SXV so will do a double plot.
Perhaps tomorrow night I will try some 136 qrss,if anyone likely to be listening over the other side. 73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12826 invoked from network); 15 Dec 2000 22:46:43 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 15 Dec 2000 22:46:43 -0000 Received: (qmail 4777 invoked from network); 15 Dec 2000 22:41:48 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 15 Dec 2000 22:41:48 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1473Sf-00068C-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 22:36:21 +0000 Received: from lepidachrosite.lion-access.net ([212.19.217.3]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1473Se-000687-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 22:36:20 +0000 Received: from w8k3f0 (Skywalker.StarWars.dialin.freeler.nl [212.26.214.188]) by lepidachrosite.lion-access.net (I-Lab) with SMTP id B19EDCAF6A for ; Fri, 15 Dec 2000 22:36:06 +0000 (GMT) Message-ID: <001e01c066e7$81353400$bcd61ad4@w8k3f0> From: "Dick Rollema" To: "LF-Group" Subject: LF: M0BMU on 73 kHz Date: Fri, 15 Dec 2000 23:34:43 +0100 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
To M0BMU and All
 
See your CQ clearly using spectogram. Don't know about O, M and all that jazz. Could also hear the signal  but too weak for a QSO. Perhaps tomorrow morning when noise level is lower.
 
73, Dick, PA0SE
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27975 invoked from network); 15 Dec 2000 21:59:13 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 15 Dec 2000 21:59:13 -0000 Received: (qmail 3110 invoked from network); 15 Dec 2000 21:54:17 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 15 Dec 2000 21:54:17 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1472iV-0005xD-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 21:48:39 +0000 Received: from gadolinium.btinternet.com ([194.73.73.111]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1472iU-0005x8-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 21:48:38 +0000 Received: from [213.122.230.124] (helo=default) by gadolinium.btinternet.com with smtp (Exim 3.03 #83) id 1472iL-00031G-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 21:48:32 +0000 Message-ID: <001501c066e0$1a140140$7ce67ad5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: Loops preamps and imps Date: Fri, 15 Dec 2000 20:07:40 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi John, it looks as though your JFETs in the preamp were not running in a linear part of their characteristic. Devices of this vintage have a wide range of threshold voltages and really need to be checked or the drain resistor value tweaked. If the drain volts were only 1 volt then the operating conditions for the emitter follower are also a bit dodgy. It also occurs to me that Tony's preamp had a pair of diodes across the loop to protect the preamp from the TX RF. This seems like more trouble. I have not tried it but I would prefer to protect the preamp fets by shorting the loop out with a small relay. This could be remotely switched by cutting the power (assuming it is remotely powered up the coax) to the preamp on TX. I was involved many years ago in protecting submerged repeater amplifiers from over-voltage pulses with diodes. We uses a pair of diodes in series (in 'anti-parallel' with another series pair). The reason being that it is the change in capacity with voltage that generates the products, and this is an inverse square law. So 2 diodes in series reduce the capacity swing by four times. I must admit I have never been a fan of op-amps at frequencies above audio maybe I am still living in the world of the 741 !! ) I would think that an op-amp would need to have a transition frequency (unity gain-bandwidth product ) of at least 15MHz to be any good at 136kHz. This is probably OK now, but they also used to be terribly noisy (by RF standards). I am afraid I cynically say that modern engineers would rather use 15 op-amps where one transistor would probably do the job just as well (probably because they dont have to work out the biassing of an op-amp !). Most things will amplify....I've seen BC107s used at 2metres !! (they were not very good! but they worked) ...but has anyone any real experience (and measurements) showing op-amps have a better performance than a discrete transistor at 136kHz. (that should start the flames going) Cheers de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2060 invoked from network); 15 Dec 2000 21:51:56 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 15 Dec 2000 21:51:56 -0000 Received: (qmail 17522 invoked from network); 15 Dec 2000 21:54:20 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 15 Dec 2000 21:54:20 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1472ia-0005xK-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 21:48:44 +0000 Received: from gadolinium.btinternet.com ([194.73.73.111]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1472iZ-0005xF-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 21:48:43 +0000 Received: from [213.122.230.124] (helo=default) by gadolinium.btinternet.com with smtp (Exim 3.03 #83) id 1472iT-00031G-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 21:48:37 +0000 Message-ID: <001901c066e0$1eb10900$7ce67ad5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: 73kHz rpt Date: Fri, 15 Dec 2000 21:42:53 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all, Fri 15 Dec. Despite very bad TV SMPS interference (FM ing through 73k band) I copied Jim as usual 'O' and about S7 as I could hear a good note despite the racket. Also Laurie G3AQC on 71.70kHz ( I think, I was concentrating and didnt log it accurately) hand keyed in a CQ call at 2129z about 459. Would probably be better on a quiet band. I think you must be my best DX on 73 to date Laurie! Cheers de Alan G3NYK JO02PB Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7154 invoked from network); 15 Dec 2000 20:52:17 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 15 Dec 2000 20:52:17 -0000 Received: (qmail 23259 invoked from network); 15 Dec 2000 20:55:20 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 15 Dec 2000 20:55:20 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1471iS-0005kV-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 20:44:32 +0000 Received: from m11.boston.juno.com ([63.211.172.74]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1471iR-0005kQ-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 20:44:31 +0000 Received: from cookie.juno.com by cookie.juno.com for <"yokUgcxCbtTP7XLrpefewJwVVHk2AoJ8TSvRc3K/dTL8FLdPtetAPQ=="> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from riese-k3djc@juno.com) by m11.boston.juno.com (queuemail) id FRCXW742; Fri, 15 Dec 2000 15:43:54 EST To: rsgb_lf_group@blacksheep.org Date: Fri, 15 Dec 2000 15:16:38 -0500 Subject: Re: LF: CFH recording night : monday 18 december Message-ID: <20001215.154008.-175243.2.riese-k3djc@juno.com> X-Mailer: Juno 2.0.11 X-Juno-Att: 0 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit From: "Bob RIESE" Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Rick I have Eclipse on my HD but have forgotten the HOW TO How is the speed adjusted to record for a long. day / hour time and is there a way to put time ticks on the tracing OR just send me the read me file if there is one Bob K3DJC From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4940 invoked from network); 15 Dec 2000 19:01:09 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 15 Dec 2000 19:01:09 -0000 Received: (qmail 21039 invoked from network); 15 Dec 2000 19:04:12 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 15 Dec 2000 19:04:12 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147047-0005Lg-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 18:58:47 +0000 Received: from fep02.swip.net ([130.244.199.130] helo=fep02-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147046-0005Lb-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 18:58:46 +0000 Received: from W98 ([212.151.93.141]) by fep02-svc.swip.net (InterMail vM.5.01.01.01 201-252-104) with SMTP id <20001215185833.OLNZ21989.fep02-svc.swip.net@W98> for ; Fri, 15 Dec 2000 19:58:33 +0100 Message-ID: <000b01c066c8$e18a3f40$8d5d97d4@W98.swipnet.se> From: "Christer Andersson" To: "RSGB LF Group" Subject: LF: New SM station on 136 Date: Fri, 15 Dec 2000 19:57:00 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I have the pleasure of reporting that SM3UWS, Wolfgang in Soederhamn now is QRV on 136. We worked on Dec 14 with 559 in both directions. The antenna is a 25 m sloping wire with 3x15 m top load. Antenna current 1,3 A. Wolfgang has also worked OH1TN (no big surprise...) /Christer SM6PXJ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6541 invoked from network); 15 Dec 2000 18:42:10 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 15 Dec 2000 18:42:10 -0000 Received: (qmail 23215 invoked from network); 15 Dec 2000 18:37:15 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 15 Dec 2000 18:37:15 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146zaH-0005GW-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 18:27:57 +0000 Received: from imo-r08.mx.aol.com ([152.163.225.8]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146zaG-0005EU-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 18:27:56 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from WarmSpgs@aol.com by imo-r08.mx.aol.com (mail_out_v28.34.) id l.91.47046b8 (3975) for ; Fri, 15 Dec 2000 13:27:17 -0500 (EST) From: WarmSpgs@aol.com Message-ID: <91.47046b8.276bbc84@aol.com> Date: Fri, 15 Dec 2000 13:27:16 EST Subject: Re: LF: Re: Loops, Pre-amps and Imps To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Windows AOL sub 117 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In a message dated 12/15/00 12:06:26 PM Eastern Standard Time, computernetworks@excite.com writes: << Curiously an earth at the shack end has the opposite effect - so not all earths are the same! >> Good observation. You may want to see an article in the LWCA File Libraries section; specifically, one linked from the page: http://lwca.org/library/rcvg-lib.htm entitled "Isolating Ground Noise" by Jim Hagan, WA4GHK, dealing with reducing noise pickup via earth connections. 73, John KD4IDY From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25021 invoked from network); 15 Dec 2000 17:03:50 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 15 Dec 2000 17:03:50 -0000 Received: (qmail 26682 invoked from network); 15 Dec 2000 17:06:51 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 15 Dec 2000 17:06:51 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146y9P-0004sO-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 16:56:07 +0000 Received: from kuku-rwcmta.excite.com ([198.3.99.63] helo=kuku.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146y9O-0004sJ-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 16:56:06 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by kuku.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001215165554.UIWN11766.kuku.excite.com@almond.excite.com> for ; Fri, 15 Dec 2000 08:55:54 -0800 Message-ID: <19748884.976899354858.JavaMail.imail@almond.excite.com> Date: Fri, 15 Dec 2000 08:55:52 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Loops, Pre-amps and Imps MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 62.253.64.5 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi All, Warning: This is a fairly length E-mail. If you don't have time to read it, please just delete it. Some while back I bought some of the ex-Decca thick plastic covered Litz and wound a 6 foot diameter KI0LE type loop with 36 turns in a basket-weave type construction. This was partly to augment my rx ability but also because of a growing interest in VLF and VF. I promised at the time to let you all know how it turned out. The antenna is about 30 metres from the shack and at the highest point of the garden. The inductance of the loop was found to be about 3 mH. 30 metres of RG58CU has a capacitance of about 3000 pF, so with a pre-amp in the shack the highest frequency it could be tuned to was about 53 kHz. This is fine for VLF but not for LF, so I built a replica of the pre-amp that I had made for my G3LNP loop. First results were very disappointing, much more noise than from the LNP loop. I put this down to electrical field pick-up, which the LNP loop seems to be much more immune to, although neither is screened. Screening the new loop is not really practical because of the large area and wind resistance. I decided to try another pre-amp, and built a design by Lloyd Butler, (VK5BR) from the old LF source book using a single op-amp the OPA111AM. I chose this design because a couple of years ago I had built his Simple Regenerative VLF-LF Receiver and Front-end, both of which work very well although with some limitations. This pre-amp turned out to work well with the new loop, about 12 dB better than the LNP loop, even though the op-amp gain was set to supposedly 1 and with an earth at the loop the electrical noise was much reduced. Curiously an earth at the shack end has the opposite effect - so not all earths are the same! However I soon noticed a "new" RTTY station on 136.25 and realised that it must be an Inter Modulation Product, but where and from what? I prepared a list of all the strong stations from 200 down to 10 kHz and using Excel calculated all of the f1 +/- f2 and 2*f1 +/- f2 products (strictly sums and differences). It turned out to be BBC Radio 4 minus a strong RTTY station on 61.75 kHz.. To confirm it, I used two receivers and feeding them both into Spectrogram could see the identical modulation (the IMP was of course upside down) at 61.25 and 136.25. So was this IMP generated in my receiver or in the pre-amp? The rx attenuator did not remove it and nor did an external attenuator, so it was obviously coming from the pre-amp. First conclusion: Feeding a decent antenna directly into a wide-band op-amp is asking for trouble unless you really live far from civilisation. Some sort of band-pass or low pass filter is essential. By the way, the list of potential IMPs from my calculation is available on request, but depending on where you are, you may have a completely different list of strong stations. Back to the LNP pre-amp. On checking the operation I found that the 2n3819s were operating at a fairly high Idss so that the drain voltage was nearer to 1 volt than the recommended 5 volts. None of the 6 or more 3819s in my junk box were any better, but on trying some 2N5457s I found that they were all quite close to the 5 or 6 volt level. On substituting a couple of these, the pre-amp ran much better, with the same sort of performance as the op-amp and more importantly no IMPs, at least none that I have found so far. The electrical noise is also reduced. Second conclusion: Check your FETs and you may find as I did that the 2N5457 is a better choice than the 3819 at least in this circuit. At one stage I had the pre-amp under test attached to the receiver with no antenna, but with just a short circuit to earth in the place of the loop and to my surprise DBF39 was still S9! I then realised that this was the result of using a plastic box. Solution line the inside of the box with baking foil - hey presto, absolute silence. Just sticking a small screwdriver into an antenna socket and removing my hand I could still get DBF39 at S7! Third conclusion: Use metal boxes or if like me you can't face all that metal work, line your box with aluminium foil. By the way I noticed that you can buy rolls of foil ready to be stuck to whatever takes your fancy in my local DIY store. It is also cheaper than metal boxes. Another source is the thick aluminium foil used for what we used to call TV dinners, masses amounts of which just seems to get thrown away. Use some plastic foam to keep your circuit board away from the metal, but do make a good contact between the foil lining and earth and a foil lining stuck inside the lid. The electrical field pick-up by the new loop is still there, but I have found that at times it disappears completely, furthermore I have realised it is the same noise that makes my vertical practically useless as a receive antenna. So the source is most probably a light dimmer or something similar nearby. Solution build a noise canceller. I have built the GW4ALG canceller but haven't got it to work satisfactorily yet - more later - meantime the house is becoming festooned with wires including now noise antennas, hi! Fourth conclusion: The LNP loop is hard to beat. The KI0LE loop is very sensitive but subject to local noise pick-up - should be good out in the countryside though. When the noise is low, I am now hearing some weak stations well (enough to read them by ear) which before were only just detectable. I have also been trying it out on VLF with a couple of Rennato Romero's designs for sensitive audio pre-amps and getting superb results. At these frequencies this type of construction is really coming into its own. I will end with a question: The purpose of the pre-amp is partly to get a bit of gain, but primarily to tune the loop and match it to 50 ohm coax. Could one use a transformer instead to effectively reduce the inductance so that it could be tuned in the shack without being swamped by the coax capacitance? 73 and apologies for what is probably an over-long E-mail. John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6289 invoked from network); 15 Dec 2000 15:25:39 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 15 Dec 2000 15:25:39 -0000 Received: (qmail 13486 invoked from network); 15 Dec 2000 15:20:44 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 15 Dec 2000 15:20:44 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146wYg-0004TI-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 15:14:06 +0000 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146wYf-0004TD-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 15:14:05 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.200.44] (helo=gemini) by hestia.herts.ac.uk with esmtp (Exim 3.16 #4) id 146wW2-000132-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 15:11:22 +0000 Message-ID: <15263.200012151513@gemini> From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Fri, 15 Dec 2000 15:17:11 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: Phase Modulator X-Mailer: Pegasus Mail for Win32 (v3.11) Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear Andy, LF Group, To generate linear phase shift, how about a PWM: Generate a sawtooth at carrier frequency, feed into one input of a comparator. Other comparator input is analogue "phase" signal. The higher the "phase" voltage, the later in the cycle the comparator changes state, ie more phase lag. You could get a square wave back again by dividing by 2; this would also limit the phase shift to 180 degrees, which is probably what you want. Main problem might be that you would have to design the circuit so that a transition would definitely occur somewhere on the cycle, whatever the analogue input voltage was - otherwise you would lose the carrier altogether. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10317 invoked from network); 15 Dec 2000 15:21:59 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 15 Dec 2000 15:21:59 -0000 Received: (qmail 17981 invoked from network); 15 Dec 2000 15:24:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 15 Dec 2000 15:24:23 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146wcE-0004Tv-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 15:17:46 +0000 Received: from rubellite.lion-access.net ([212.19.217.4]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146wcD-0004Tq-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 15:17:45 +0000 Received: from w8k3f0 (1Cust92.tnt29.rtm1.nl.uu.net [213.116.152.92]) by rubellite.lion-access.net (I-Lab) with SMTP id E14AB2A05 for ; Fri, 15 Dec 2000 15:17:29 +0000 (GMT) Message-ID: <001e01c066aa$38809c00$5c9874d5@w8k3f0> From: "Dick Rollema" To: "LF-Group" Subject: LF: Fw: CFH/73kHz Tonight Date: Fri, 15 Dec 2000 16:16:36 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: To All from PA0SE Jim, M0BMU wrote: > At roughly 2215 a carrier > appeared at about 136.95, being keyed on and off intermittently > (CFH station cat loose again?). Eventually it came on as a > continuous carrier, and was fading out in the usual way when I left > for work this morning. I recorded the same signal using the eclipse software; actually the first time I used it, though it was in the computer since the eclipse. 73, Dick, PA0SE From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29125 invoked from network); 15 Dec 2000 15:19:46 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 15 Dec 2000 15:19:46 -0000 Received: (qmail 4296 invoked from network); 15 Dec 2000 15:14:52 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 15 Dec 2000 15:14:52 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146wSE-0004Pr-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 15:07:26 +0000 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146wSD-0004Pm-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 15:07:25 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail.cc.kuleuven.ac.be (8.9.3/8.9.0) with SMTP id QAA483202 for ; Fri, 15 Dec 2000 16:07:07 +0100 Message-ID: <3.0.1.16.20001215165900.2c572af8@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Fri, 15 Dec 2000 16:59:00 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: LF: CFH recording night : monday 18 december In-reply-to: <001f01c06535$39193800$90be01d5@default> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In order to get a better understanding of transatlantic propagation on 136kHz it would be interesting to record the Canadian Naval station CFH (on 137kHz) on a number of (European) locations during the same period. As far as I am informed CFH will be recorded in the UK, Sweden and Belgium, but it would be usefull to have some more participants from other countries too. CFH is transmitting a continious carrier for the last days, this makes recording easier so I suggest to have a first recording period during the night of monday 18 december (starting 18UTC) / tuesday 19 december (until CFH fades away, or you have to leave for work). For those who have no special recording equipement it is possible to make a recording using the PC soundcard and the 'eclipse' software that can be downloaded from : http://hamradio.nikhef.nl/tech/prog/eclipse.htm The ZIP file includes the program and a manual. The 2 main things you have to keep in mind with the eclipse software is : 1. The receiver AGC should NOT become active during recording, there are 3 options to ensure this : - set AGC off if your RX allows this - add sufficient attenuation between antenna and RX - set the 'RF gain' to a sufficient level to ensure that it will not be 'overruled' by the AGC. 2. The soundcard should not be saturated during the recording. Ensure that the audio gain control is not too high (the 's-meter' of the eclipse software should be at -40dB or less when CFH is absent). If possible check the values for attenuation (or RF gain) and audio gain during one of the noghts prior to monday to ensure that there is no clipping or saturation. Data file can be sent to me (please zip), name it yourcall.txt (eg. ON7YD.TXT), I will forward the data to Alan (G3NYK) and to whoever is interested. Those who record 'mechanical' (pen recorders) can either scan the result and send it as a picture (any format is OK) or just mail it to Alan or me (whatever is cheapest). Remind that not only the propagation differences over larger distances are interesting but also over short distances, it is possible that there can be remarkable differences even when the recording stations are only a 25km apart, so everyone can make a meaningfull contribution by participating. 73, Rik ON7YD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19517 invoked from network); 15 Dec 2000 15:09:49 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 15 Dec 2000 15:09:49 -0000 Received: (qmail 1380 invoked from network); 15 Dec 2000 15:12:52 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 15 Dec 2000 15:12:52 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146wPr-0004Ph-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 15:04:59 +0000 X-MSMail-Priority: High Received: from ns1.swh.sk ([192.108.125.33]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146wPq-0004PZ-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 15:04:58 +0000 Received: from hermes.swh.sk (hermes [139.24.136.129]) by ns1.swh.sk (8.9.1/8.9.1) with ESMTP id QAA28565 for ; Fri, 15 Dec 2000 16:04:44 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from btss101a.swh.sk (btss.swh.sk [139.24.136.15]) by hermes.swh.sk (8.9.3/8.9.2) with ESMTP id QAA09947 for ; Fri, 15 Dec 2000 16:04:40 +0100 (MET) Received: by btss.swh.sk with Internet Mail Service (5.5.2448.0) id ; Fri, 15 Dec 2000 16:04:38 +0100 Message-ID: <29BDD4F529FCD311B631009027357C4E01C1223C@btss103a.swh.sk> From: "Gasparik Richard" To: "Rsgb_Lf_Group \(E-mail\)" Subject: LF: Weekend activity... Date: Fri, 15 Dec 2000 16:04:38 +0100 Importance: high X-Priority: 1 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2448.0) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi LF-ers... I'll try to be active this weekend on 136, but the weather is realy terrible...fog, rain and wind, temperature about 4-6 Celsius. Weather forecast for the weekend is the same with temperature about 0. Second problem is that one from my fets burned up and I must replace it with other one, but from another producer. I don't know if it will work without problems...has anybody experience with power amplifiers with mixed fets (IRFP450) with different parameters ? 73 de Rich OM2TW Richard Gasparik SIEMENS SBS IT-Service Stromova 9 Bratislava tel: +421-(0)7-5968 2989 fax:+421-(0)7-5968 5904 mobile: +421-(0)903 416609 e-mail: richard.gasparik@sbs.sk From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14037 invoked from network); 15 Dec 2000 15:05:34 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 15 Dec 2000 15:05:34 -0000 Received: (qmail 2935 invoked from network); 15 Dec 2000 15:08:37 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 15 Dec 2000 15:08:37 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146wLU-0004O9-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 15:00:28 +0000 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146wLT-0004O4-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 15:00:27 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.200.44] (helo=gemini) by hestia.herts.ac.uk with esmtp (Exim 3.16 #4) id 146wIq-0007hh-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 14:57:44 +0000 Message-ID: <14316.200012151500@gemini> From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Fri, 15 Dec 2000 15:03:34 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: 73kHz band plan X-Mailer: Pegasus Mail for Win32 (v3.11) Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear Laurie & Group, Not sure if a band plan exists as such, but the way it has normally been worked in the past is something like: 71.6kHz - 71.75kHz manual CW "window" (when the Rugby TX is running, this is the quietest bit of the band, and so best part for a CW QSO). around 71.8kHz - QRSS (at one point, the 5 or so stations regularly operating QRSS each had their own "channel" in 10Hz increments - mine was 71.81kHz). It only becomes an issue when a number of people are QRV, especially when working cross-band. I think I will stick to 71.81 for X-band QRSS tonight - that way there isn't much chance of clashing. Unless anyone has a better idea........... I had no problem hearing you last week, Laurie, so will certainly be listening on 73k at 2000, and periodically after that, for a CW QSO. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1681 invoked from network); 15 Dec 2000 14:13:02 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 15 Dec 2000 14:13:02 -0000 Received: (qmail 12482 invoked from network); 15 Dec 2000 14:15:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 15 Dec 2000 14:15:26 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146vWg-0004Ak-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 14:07:58 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146vWf-0004Af-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 14:07:57 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id OAA27089; Fri, 15 Dec 2000 14:08:20 GMT Received: (qmail 26857 invoked from network); 15 Dec 2000 15:03:02 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 15 Dec 2000 15:03:02 -0000 Received: by gauntlet.mail.dera.gov.uk; id OAA11978; Fri, 15 Dec 2000 14:57:38 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma011941; Fri, 15 Dec 00 14:57:23 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Fri, 15 Dec 2000 14:09:15 +0000 Received: by FRN-GOLD-1 with Internet Mail Service (5.0.1460.8) id ; Fri, 15 Dec 2000 14:07:31 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D7493@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: RE: LF: PSK sidebands Date: Fri, 15 Dec 2000 14:07:32 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Has anyone any simple hardware designs for a continuously variable phase shifters for these frequencies. A varicap and tuned circuit is a bit messy at 137kHz and I/Q generation gets complicated implementing the SIN/COS functions . It would all be straightforward using DSP, but some relatively simple solution, filtering the output from the VE2IQ software then applying to a phase modulator ought to be possible. Andy G4JNT > From: Klaus von der Heide [mailto:v.d.heide@on-line.de] > if PSK is done by choosing an appropriate continuous > base band impulse form (raised Cosine, Gauss or Sinc) > and modulating the phase at constant envelope (CPM), > then the spectrum of PSK rapidly vanishes beyond -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6741 invoked from network); 15 Dec 2000 13:59:38 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 15 Dec 2000 13:59:38 -0000 Received: (qmail 11218 invoked from network); 15 Dec 2000 14:02:40 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 15 Dec 2000 14:02:40 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146vLe-00046P-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 13:56:34 +0000 Received: from cmailg2.svr.pol.co.uk ([195.92.195.172]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146vLd-00046K-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 13:56:33 +0000 Received: from modem-233.elostirion.dialup.pol.co.uk ([62.136.186.233] helo=lvm) by cmailg2.svr.pol.co.uk with smtp (Exim 3.13 #0) id 146vLW-0002OK-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 13:56:26 +0000 Message-ID: <000401c0669f$46f26da0$e9ba883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. CFH/73KHz tonight Date: Fri, 15 Dec 2000 13:59:02 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Hi Jim,
Yes CFH was doing odd things last night,I was going to set up a recording run,when I noticed the on/off carrier that you mention.SXV was absent also so I decided not to waste paper. But you are quite right CFH is quite strong,pity no one seems to be listening or indeed transmitting.I have 1W ERP at the moment and would be very happy to give it a bash.Re. 73 KHz as tonight is activity night I will be about and would appreciate a contact.By the way is there a Band Plan ?I dont want to transmit on the wrong Mode/ Freq.
73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20992 invoked from network); 15 Dec 2000 13:11:23 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 15 Dec 2000 13:11:23 -0000 Received: (qmail 6077 invoked from network); 15 Dec 2000 13:06:28 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 15 Dec 2000 13:06:28 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146uRb-0003sy-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 12:58:39 +0000 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146uRb-0003st-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 12:58:39 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.200.44] (helo=gemini) by hestia.herts.ac.uk with esmtp (Exim 3.16 #4) id 146uOy-0004wu-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 12:55:56 +0000 Message-ID: <5251.200012151258@gemini> From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Fri, 15 Dec 2000 13:01:43 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: CFH/73kHz Tonight X-Mailer: Pegasus Mail for Win32 (v3.11) Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF group, I have been trying the 'Eclipse' data logging software in preparation for group CFH monitoring experiments - it seems to be working fine, although I can't get all parts of the eclipse window visible on my primitive monitor. Whilst trying it out last night, I noticed there seemed to be no CFH on about 137.04kHz where it has been transmitting a carrier lately. Conditions seemed quite strange, the low level of noise and lack of signals had me checking antenna connections, but everything seemed OK. At roughly 2215 a carrier appeared at about 136.95, being keyed on and off intermittently (CFH station cat loose again?). Eventually it came on as a continuous carrier, and was fading out in the usual way when I left for work this morning. I assume this actually was CFH - they seem to be altering things around again. G3NYK's chart on ON7YD's web site shows something similar. The SNR looked like a pretty impressive 30dB at best on Alan's chart, and this was about what I was seeing too. This should easily be good enough for QRSS with 1W ERP, and wouldn't have to improve that much for normal CW - we need to get some more tests going! Since today is Friday, I intend to be QRV on 73 kHz again this evening, hopefully from 2000 onwards. I will mainly be listening for cross-band QSOs on around 137.7kHz. As always, any reports would be welcome. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3853 invoked from network); 15 Dec 2000 12:46:04 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 15 Dec 2000 12:46:04 -0000 Received: (qmail 13051 invoked from network); 15 Dec 2000 12:49:06 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 15 Dec 2000 12:49:06 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146uAF-0003oF-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 12:40:43 +0000 Received: from [193.96.224.45] (helo=mail1.isys.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146uAE-0003oA-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 12:40:42 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [195.64.97.61] (helo=k) by mail1.isys.net with esmtp (Exim 3.16 #1) id 146uAp-0000yi-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 13:41:20 +0100 From: "Klaus von der Heide" To: rsgb_lf_group@blacksheep.org Date: Fri, 15 Dec 2000 13:42:28 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: PSK sidebands In-reply-to: <006401c06616$bfdb2e20$82b21bca@xtr743187> X-Mailer: Pegasus Mail for Win32 (v3.12b) Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello all, if PSK is done by choosing an appropriate continuous base band impulse form (raised Cosine, Gauss or Sinc) and modulating the phase at constant envelope (CPM), then the spectrum of PSK rapidly vanishes beyond +-baudrate. Such a signal can easily be generated by a DSP. 73 de Klaus, DJ5HG From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8510 invoked from network); 15 Dec 2000 12:27:07 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 15 Dec 2000 12:27:07 -0000 Received: (qmail 18946 invoked from network); 15 Dec 2000 12:30:09 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 15 Dec 2000 12:30:09 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146tqD-0003kG-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 12:20:01 +0000 Received: from fep04.swip.net ([130.244.199.132] helo=fep04-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146tqC-0003jo-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 12:20:00 +0000 Received: from oemcomputer ([212.151.103.204]) by fep04-svc.swip.net (InterMail vM.5.01.01.01 201-252-104) with SMTP id <20001215121940.NGGP12128.fep04-svc.swip.net@oemcomputer> for ; Fri, 15 Dec 2000 13:19:40 +0100 Message-ID: <00b801c06691$60a82fe0$ee1197d4@oemcomputer> From: "Johan Bodin" To: rsgb_lf_group@blacksheep.org Subject: SV: LF: PSK sidebands Date: Fri, 15 Dec 2000 13:20:13 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi All, >Class C, D, and E amplifiers are not that hard to modulate. Rather than do >anything so drastic as tinkering with PWM in the RF driver stages, apply PWM >methods to the power supply for the final! Yes! I have tried this with PSK31 (at QRP level) and it works very well. I got my inspiration from Clint Turner and his beacon: http://www.ussc.com/~turner/psk_transmitter.html At higher power levels, more attention must be paid to reduction of sidebands from the finite resolution of the PWM and of course the PWM frequency itself. Good luck with your 340V PWM modulator Andy! Perhaps the explosions can be heard here in Sweden? ;-) 73 Johan SM6LKM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14765 invoked from network); 15 Dec 2000 11:51:38 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 15 Dec 2000 11:51:38 -0000 Received: (qmail 28404 invoked from network); 15 Dec 2000 11:46:43 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 15 Dec 2000 11:46:43 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146tA3-0003Z8-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 11:36:27 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146tA0-0003Z0-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 11:36:24 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id LAA05853; Fri, 15 Dec 2000 11:36:46 GMT Received: (qmail 10004 invoked from network); 15 Dec 2000 12:31:28 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 15 Dec 2000 12:31:28 -0000 Received: by gauntlet.mail.dera.gov.uk; id MAA21528; Fri, 15 Dec 2000 12:26:05 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma021493; Fri, 15 Dec 00 12:25:45 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Fri, 15 Dec 2000 11:37:36 +0000 Received: by FRN-GOLD-1 with Internet Mail Service (5.0.1460.8) id ; Fri, 15 Dec 2000 11:35:53 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D7490@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: RE: LF: PSK sidebands Date: Fri, 15 Dec 2000 11:36:01 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: We're thinking along the same lines. I tried a PWM modulator a few months ago - it is shown in the latest LF experimenters book - but this required an 8 bit digital input for the PWM. It could modulate rails up to 50V at 10A but could be expanded. Tried the concept with a (badly generated) PSK31 waveform on 1.8MHz with sucess, but the poor generation due to the way I encoded the waveform using 6 bit amplitude sampled at 500Hz, generated unacceptable sideband levels at the 500Hz sampling rate. Never carried on any further as this project was not a priority then. The only switching PAs I have at the moment are the experimental big ones, so these look a contender for the next PWM supply controller. There's a challenge, a 0-100% duty cycle 340V controller using PWM ! Andy G4JNT > > If one is serious enough about civilized PSK sidebands to > consider linear > amplification-- which is no trivial matter at the "California > kilowatt" > Class C, D, and E amplifiers are not that hard to modulate. >> stages, apply PWM > methods to the power supply for the final! > > If the amplitude component and RF phase/frequency components > are reunited in > the final amplifier without excessive time difference, the > -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28797 invoked from network); 15 Dec 2000 11:38:20 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 15 Dec 2000 11:38:20 -0000 Received: (qmail 13116 invoked from network); 15 Dec 2000 11:33:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 15 Dec 2000 11:33:26 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146sv4-0003Vi-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 11:20:58 +0000 Received: from mta1-win.server.ntli.net ([62.253.164.41] helo=mta1-svc.virgin.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146sv3-0003Vd-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 11:20:57 +0000 Received: from p.cleal ([62.252.38.134]) by mta2-svc.virgin.net (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001207181400.BAQQ265.mta2-svc.virgin.net@p.cleal> for ; Thu, 7 Dec 2000 18:14:00 +0000 Message-ID: <002a01c06079$a42b8a00$8626fc3e@p.cleal> From: "Peter Cleall" To: rsgb_lf_group@blacksheep.org Subject: LF: the old LF source book Date: Thu, 7 Dec 2000 18:10:28 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: >Sounds like the LF source book of a couple of years ago. Most of the >information was obsolete and bore no resemblence to the achievements taking >place when it was published. I think 23 km was the record when in fact I had >worked OH1TN and got 579 on normal morse when it went to print. >G3KEV I do not understand why you have to be so rude about the source book. When it was published I believe it was a genuine attempt to get the best information that was available, and easily reproducible, quickly out to the interested beginners. I for one have constantly referred to various sections of it, often going back and picking up a few more nuggets by re reading. Surely that is the purpose of a source book. Records by their very nature are transient things which most of us appreciate, will, at some stage, be overtaken. The technical content however can be reused. As shown by our use of of documentation of LF work done in the 1920's to 1950's. peter G8AFN From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14287 invoked from network); 15 Dec 2000 05:05:34 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 15 Dec 2000 05:05:34 -0000 Received: (qmail 942 invoked from network); 15 Dec 2000 05:00:39 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 15 Dec 2000 05:00:39 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146ms2-0002BG-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Dec 2000 04:53:26 +0000 Received: from imo-r17.mx.aol.com ([152.163.225.71] helo=imo-r17.mail.aol.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146ms0-0002BB-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Dec 2000 04:53:25 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from WarmSpgs@aol.com by imo-r17.mx.aol.com (mail_out_v28.34.) id l.bb.9e3fb27 (16786) for ; Thu, 14 Dec 2000 23:52:29 -0500 (EST) From: WarmSpgs@aol.com Message-ID: Date: Thu, 14 Dec 2000 23:52:29 EST Subject: Re: LF: PSK sidebands To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Windows AOL sub 117 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: If one is serious enough about civilized PSK sidebands to consider linear amplification-- which is no trivial matter at the "California kilowatt" levels being discussed here lately-- why not simply take the next logical step? Class C, D, and E amplifiers are not that hard to modulate. Rather than do anything so drastic as tinkering with PWM in the RF driver stages, apply PWM methods to the power supply for the final! The late Helge Granville of Motorola was a big proponent of Envelope Elimination and Restoration, a technique in which the amplitude envelope of a low level modulated (and filtered) signal is extracted and amplified, which can be done with the same efficiency as the Class D or E RF final. The RF component of the signal is hard limited and amplified through the regular RF chain, preserving whatever phase changes are implicit in the modulation technique being used. If the amplitude component and RF phase/frequency components are reunited in the final amplifier without excessive time difference, the result is a close approximation to linear amplification, but at switching-mode efficiencies. Furthermore, since the sharpest phase changes take place during those instants when the supply voltage is at its lowest values, the strain on the RF power transistors is minimal. Admittedly, to implement EER for high-performance SSB or ISB transmitters, spread spectrum, etc., is not a trivial matter either. The required dynamic range and time delay matching can be pretty stringent. Still, amateurs have built some very good 200-500W HF transmitters using the method, and the requirements are not nearly so tight for relatively low speed data modes such as we use on LF. It might be worth a try. 73, John From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10226 invoked from network); 14 Dec 2000 21:46:18 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 14 Dec 2000 21:46:18 -0000 Received: (qmail 26274 invoked from network); 14 Dec 2000 21:49:19 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 14 Dec 2000 21:49:19 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146g5Y-0000dF-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 14 Dec 2000 21:38:56 +0000 Received: from mta6-rme.xtra.co.nz ([203.96.92.19]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146g5W-0000dA-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Dec 2000 21:38:54 +0000 Received: from xtr743187 ([202.27.178.130]) by mta6-rme.xtra.co.nz with SMTP id <20001214213813.DCSG1003258.mta6-rme.xtra.co.nz@xtr743187> for ; Fri, 15 Dec 2000 10:38:13 +1300 Message-ID: <006401c06616$bfdb2e20$82b21bca@xtr743187> From: "Vernall" To: rsgb_lf_group@blacksheep.org References: <65AECDF1F89AD411900400508BFC869F0D7488@pdw-mail-1.dera.gov.uk> Subject: LF: PSK sidebands Date: Fri, 15 Dec 2000 10:41:38 +1300 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2919.6600 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Andy G4JNT and others,
 
Some comments on grappling with PSK keying clicks:
 
>I have been considering the key click problem when using BPSK with switching transmitters.  Traditionally, amplitude shaping is >used to limit the transmitted bandwidth of PSK signals, but this is not a valid solution for class E Txs . Dave's idea of going part >way there by ramping the PSU to the driver chips to generate Pulse Width Mod being only a temporary solution.  PWM of the >drive waveform does not linearly control the amplitude of the RF component which varies with pulse width in a SIN(X) / X manner.
 
>Has anyone any experience of systems that ramp the phase slowly in lieu of the amplitude ?    My feeling is that this will give a >similar result to amplitude shaping, but the text books don't cover PSK bandwidth control using a constant amplitude waveform. 
 
Class C, D or E, or any other nonlinear power amplifier, is fundamentally a wrong choice for handing a PSK signal.  There will inevitably be a "jump" in waveform at conduction threshold and cuttoff.  As Class E is specifically designed to spend least time switching between "full on" and "cut off" then clicks (transient sidebands) then clicks occur at all phase changes.  Even if all driver stages are nice and linear, the PA will "digitise" it to on and off.
 
For amateur operation, one way could be that key clicks are acceptable, for high efficiency power amplifiers, and weave this in to a band plan, having a segment for "dirty transmitters".  Those who generate key clicks should be happy to exist alongside other clickers.
 
Another approach could be to develop a more sophisticated power amplifier, with a Class AB1 section to handle all small signals, and Class E for higher level parts of the emission.  In New Zealand we have enough bandwidth to run SSB on LF, so anyone building a big amplifier would look at including linear mode of operation.  I am contemplating building an amplifier with n+n pushpull transistors, with at least one pair working in Class AB1 and others in unbiased AB2 mode.  The value of n is say 10 or 20 (no mucking around, at least 1 kW is a target output).  The idea is that an AB1 stage is active at all times and easily handles low level, but when a bigger level arrives it is sufficient to automatically commutate the AB2 devices.  I have already run my existing bipolar amplifier with no bias and it still gets readability 5 reports on SSB, even though a local can notice a moderate drop in quality and dynamic range.  When hard driven in CW mode, the efficiency is very high (much better than theoretical Class C).  I have a good stock of bipolar switching transistors, so I have a preference for using them rather than power MOSFETs, but the suggestion of having mixed classes of amplification in a single final unit should be able to be contemplated.  There could even be a mixture of bipolars and MOSFETs, or other devices, sharing the same power supply, so long as an AB1 stage can operate in linear fashion.  There could even be different backoff in bias for clusters of devices, to get piecewise cut-in and cut-out over the drive waveform.  Some questions are:
- how many of the devices need to be biased to give sufficiently linear operation to reduce PSK key clicks to a satisfactory level?
- is the phasing of Class AB1 and Class E output signals such that the AB1 devices do not get interfered with, or fried?
- does any reader have large signal modelling software to assess the viability of the suggestion?
 
73, Bob ZL2CA 
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18630 invoked from network); 14 Dec 2000 18:44:12 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 14 Dec 2000 18:44:12 -0000 Received: (qmail 9289 invoked from network); 14 Dec 2000 18:46:37 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 14 Dec 2000 18:46:37 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146dHB-0008V0-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 14 Dec 2000 18:38:45 +0000 Received: from mta1-win.server.ntli.net ([62.253.164.41] helo=mta1-svc.virgin.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146dHA-0008Uv-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Dec 2000 18:38:44 +0000 Received: from p.cleal ([62.252.37.55]) by mta1-svc.virgin.net (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001214184050.MJYV255.mta1-svc.virgin.net@p.cleal> for ; Thu, 14 Dec 2000 18:40:50 +0000 Message-ID: <000901c065fd$33fe29c0$3725fc3e@p.cleal> From: "Peter Cleall" To: "RSGB LF group" Subject: LF: old lf source book followup Date: Thu, 14 Dec 2000 18:38:42 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: My e-mail received by reflection 13:24 today was posted out at 08:05 on the 9 Dec. It was a reposting of one sent a few days earlier which disappeared into the Ether. When I resent it I changed the subject line. That is 5 days ago. The G3YXM telemail from GU took a similar time. I also notice that I have had repeat messages from some people in the last couple of weeks. Do we have Gremlins in our system ??. How long should we wait to see our reflection before we repost? G8AFN From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27298 invoked from network); 14 Dec 2000 17:58:15 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 14 Dec 2000 17:58:15 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 27933 invoked from network); 14 Dec 2000 17:53:22 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 14 Dec 2000 17:53:22 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146cSF-0008Jm-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 14 Dec 2000 17:46:07 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from anchor-post-33.mail.demon.net ([194.217.242.91]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146cSC-0008Jh-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Dec 2000 17:46:04 +0000 Received: from telemetry.demon.co.uk ([194.222.19.114]) by anchor-post-33.mail.demon.net with smtp (Exim 2.12 #1) id 146cS2-000EnJ-0X for rsgb_lf_group@blacksheep.org; Thu, 14 Dec 2000 17:45:56 +0000 Message-ID: Date: Thu, 14 Dec 2000 17:51:43 +0000 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: Re: LF: Re: Re: 73 khz permits In-reply-to: <3A378A74.26297.F5FD8F@localhost> MIME-Version: 1.0 X-Mailer: Turnpike Version 3.03a Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In message <3A378A74.26297.F5FD8F@localhost>, Mike Dennison writes > What >a pity that of the several hundred Novs issued initially, only a handful >were ever used. > >It could be that more have been used than we know about. I had an e- mail this week from G3XZX who has been conducting low power 73 KHz tests over distances of only a few kilometres. Maybe there are lots of weak little signals in there if only we could hear them! > >73, Tom G3OLB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6423 invoked from network); 14 Dec 2000 13:35:45 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 14 Dec 2000 13:35:45 -0000 Received: (qmail 723 invoked from network); 14 Dec 2000 13:38:47 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 14 Dec 2000 13:38:47 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146YSh-0007Hy-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 14 Dec 2000 13:30:19 +0000 Received: from mta8-win.server.ntli.net ([62.253.164.48] helo=mta8-svc.virgin.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146YSg-0007Ht-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Dec 2000 13:30:18 +0000 Received: from p.cleal ([62.252.36.10]) by mta2-svc.virgin.net (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001209080357.IQCA265.mta2-svc.virgin.net@p.cleal> for ; Sat, 9 Dec 2000 08:03:57 +0000 Message-ID: <001f01c061b6$c35f03a0$0a24fc3e@p.cleal> From: "Peter Cleall" To: "RSGB LF group" Subject: LF: the old source book Date: Sat, 9 Dec 2000 08:05:07 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: >Sounds like the LF source book of a couple of years ago. Most of the >information was obsolete and bore no resemblance to the achievements taking >place when it was published. I think 23 km was the record when in fact I had >worked OH1TN and got 579 on normal Morse when it went to print. >G3KEV I do not understand why you have to be so rude about the source book. When it was published I believe it was a genuine attempt to get the best information that was available, and easily reproducible, quickly out to the interested beginners. I for one have constantly referred to various sections of it, often going back and picking up a few more nuggets by re reading. Surely that is the purpose of a source book. Records by their very nature are transient things which most of us appreciate, will, at some stage, be overtaken. The technical content however can be reused. As shown by our use of of documentation of LF work done in the 1920's to 1950's. peter G8AFN From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7256 invoked from network); 14 Dec 2000 13:04:13 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 14 Dec 2000 13:04:13 -0000 Received: (qmail 25963 invoked from network); 14 Dec 2000 12:59:20 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 14 Dec 2000 12:59:20 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146Xo4-000771-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 14 Dec 2000 12:48:20 +0000 Received: from mailout06.sul.t-online.com ([194.25.134.19]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146Xo0-00076w-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Dec 2000 12:48:16 +0000 Received: from fwd05.sul.t-online.com by mailout06.sul.t-online.com with smtp id 146Xnr-0006Gq-02; Thu, 14 Dec 2000 13:48:07 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from t-online.de (320038607418-0001@[62.227.229.173]) by fwd05.sul.t-online.com with esmtp id 146Xnd-1VCkmuC; Thu, 14 Dec 2000 13:47:53 +0100 Message-ID: <3A393587.721211A2@t-online.de> Date: Thu, 14 Dec 2000 13:03:03 -0800 From: "Peter Bertram" X-Mailer: Mozilla 4.08 [de]C-DT (Win16; I) MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: VE2CV and CFA: url pse Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Sender: 320038607418-0001@t-dialin.net Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello, some days ago there was a msg with a reference to an article by VE2CV. Unfortunately the url did not work. Is there anybody out who has the topical url? Thank you in advance! 73, Peter From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27635 invoked from network); 13 Dec 2000 22:17:14 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 13 Dec 2000 22:17:14 -0000 Received: (qmail 28413 invoked from network); 13 Dec 2000 22:20:06 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 13 Dec 2000 22:20:06 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146KAg-0003q6-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Dec 2000 22:14:46 +0000 Received: from cmailg2.svr.pol.co.uk ([195.92.195.172]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146KAe-0003q1-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Dec 2000 22:14:44 +0000 Received: from modem-122.anfauglir.dialup.pol.co.uk ([62.136.109.250] helo=lvm) by cmailg2.svr.pol.co.uk with smtp (Exim 3.13 #0) id 146KAX-0000uc-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Dec 2000 22:14:38 +0000 Message-ID: <000701c06552$8a3003a0$fa6d883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. CFH Recordings Date: Wed, 13 Dec 2000 22:17:10 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Hi Rik,
I have been making recordings of CFH for some time now,lately I have recorded both CFH and SVX for comparison purposes.I use the old fashioned pen recorder
since I understand the technology better Hi. I will be happy to cover Monday 18th
and any other time, but will not be able to transmit my results other than by post.
Best wishes for the experiment.73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14121 invoked from network); 13 Dec 2000 19:31:10 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 13 Dec 2000 19:31:10 -0000 Received: (qmail 21033 invoked from network); 13 Dec 2000 19:33:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 13 Dec 2000 19:33:23 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146HYh-0003AC-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Dec 2000 19:27:23 +0000 Received: from imo-r19.mx.aol.com ([152.163.225.73] helo=imo-r19.mail.aol.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146HYg-0003A7-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Dec 2000 19:27:22 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from DL4YHF@aol.com by imo-r19.mx.aol.com (mail_out_v28.34.) id l.6f.e593faa (4008) for ; Wed, 13 Dec 2000 14:26:33 -0500 (EST) From: DL4YHF@aol.com Message-ID: <6f.e593faa.27692768@aol.com> Date: Wed, 13 Dec 2000 14:26:32 EST Subject: LF: Re: PSK sidebands with "slow phase changes" To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Windows AOL sub 69 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Andy, Steward and others, I also think that modifying the PSK generator with a 'slow phase change' as suggested by Steward (KK7KA) is a very good idea so we don't need linear transmitters / transverters for this task. I will try to program a kind of "test generator" (no real PSK modulator) to see what the spectrum looks like. Or has someone done this before so we don't have to invent the wheel twice ? 73's Wolf (DL4YHF) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12543 invoked from network); 13 Dec 2000 19:05:00 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 13 Dec 2000 19:05:00 -0000 Received: (qmail 19690 invoked from network); 13 Dec 2000 18:59:54 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 13 Dec 2000 18:59:54 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146H1I-00031Y-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Dec 2000 18:52:52 +0000 Received: from carbon.btinternet.com ([194.73.73.92]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146H1G-00031T-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Dec 2000 18:52:51 +0000 Received: from [62.7.99.58] (helo=default) by carbon.btinternet.com with smtp (Exim 3.03 #83) id 146H19-0000n8-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Dec 2000 18:52:43 +0000 Message-ID: <001f01c06535$39193800$90be01d5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: CFH comparisons UK and ON Date: Wed, 13 Dec 2000 15:16:30 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Rik, and the Group, thanks for your efforts at comparing the signal as received here and in Belgium. I think although it seems at first sight that there is a vast difference between the plots, I can see some similarities and possibly some reasons for the differing shapes of the plots. The story starts.... The series of X-ray flares on the 24/25 th of November were accompanied by a large cloud of plasma. Some of the faster particle effects can be seem I believe by the increase in deep fades on plots starting on the 26 and 25th Nov evenings (My dates are plot-start dates) I believe the main shock from of the CME arrived at about 0330z on 28th. This produced a high level of particle injection into the D-layer, driving the nightime D-layer into strong absorption at 136kHz. Note the K-index rises to storm levels at about midnight on 26/27th. The radio effects at LF are known to lag the index slightly. The plot for 29th November shows severe attenuation all night. Propagation during this period would be by 2 or more like even 3 hops ( a rather lossy process) with the 'reflection' layer being the bottom of the D-layer at about 50kms. At this time CFH is often 'visible' (on a waterfall display) for most of the day. An interesting effect now appears. If you look at successive nights the attenuation increases as the night progresses (at least for the first 4-5 hours) I believe this may be that as the photo-dissociated ions decay, the reflection layer moves steadily upwards into the D-layer but then the signal must pass through more of the 'absorbing' part of the layer to reach the reflection level. The injected ions have a different nature to the ions producted by solar UV, do not decay as quickly, and seem to mainly act as absorbers. This 'indifferent' low signal propagation continues until 2 December. Note that the average level of the signal seems to increase slowly each night, but there are no violent deep fades. The 3rd December starts with the signal decreasing steadily for the first 4 hours from the initial peak, then a very rapid fading starts to set in, leading to a good peak between 0500 and 0700z. I believe this is the beginging of what I call the "multipath period" of the event. The absorption has decreased sufficently for the signal to be able to significantly penetrate the D-layer and be 'reflected' from two different levels. This leads to destructive interference ( the 'optical' definition of interference) and will produce a 'fringe' pattern in the receiving region. The fringe pattern will move as the altitude of the reflecting layers change. A crude calculation suggests that the fringe peaks could be as widely separated as 25kms (about 10 wavelengths) due to the acute angle of arrival. I believe in some circumstances, late in this part of the event, some of the signal may be reaching the E-layer. This might mean the interaction of 3 separate paths ( different numbers of hops? ) and a very complex fading pattern. The result is a totally different temporal pattern of the fading and also, depending on the phase coincidence of maybe three paths, a significantly different peak levels at different sites. I believe that this multipath fading period of the event could be the best opportunity for 'catching the wave' in the surfers terms, as 3 coincident wave paths interfering constructively could yield a 9dB improvement over a single path signal strength. My 5th Dec plot shows an series of increasing peaks to a mamoth 46dBu between 0530z and 0700z. I have some slight quarms about the signal level comparison for plots before and after the 5 Dec due the removal of the modulation. It is estimated that this should not make a difference of more than 3dB, which is considerably less that the massive levels we have seen recently. Both Rik's and my plot show a slowly declining series of peaks as the night progresses. What is interesting is to look in detail and see the fast fading (around about 2db p-p) with a period of about 10mins, visible on both plots. The other interesting point is that a lot of the peaks on my plot correspond to dips on Rik's and vice-versa. I do have all the raw data from my plots available for re-analysis. I am certainly interested to see the shape of any plots that can be produced from differnt locations. It may be possible to shed some more light on this problem of multipath....and the perenial question of "How many hops?" The above ideas are based on a study (slightly mind numbing!) of several papers on LF propagation, but mainly on a tutorial by John Belrose in the 1975 AGARD series, and a number of articles in the 1990 CCIR Reports and Recommendations. Very little modern work (after 1940) actually covers this kind of propagation, over such a long path, in detail, because it only has a nuisance value to the professionals. My ideas may be controversial, possibly even totally wrong, but at least its a start, and they do seem to line up with at least three solar event periods logged during my monitoring.. My thanks to Vaino for a lot of encouragement and advice, and Rik for his work displaying the plots on his web site. Cheers de Alan G3NYK JO02PB Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16234 invoked from network); 13 Dec 2000 18:22:55 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 13 Dec 2000 18:22:55 -0000 Received: (qmail 13475 invoked from network); 13 Dec 2000 18:25:08 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 13 Dec 2000 18:25:08 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146GR2-0002qT-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Dec 2000 18:15:24 +0000 Received: from gigi.excite.com ([199.172.152.110]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146GR1-0002qO-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Dec 2000 18:15:23 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by gigi.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001213181500.GPBA9407.gigi.excite.com@almond.excite.com> for ; Wed, 13 Dec 2000 10:15:00 -0800 Message-ID: <30349558.976731300937.JavaMail.imail@almond.excite.com> Date: Wed, 13 Dec 2000 10:14:58 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re: Re: 73 khz permits MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 213.104.154.238 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Mike Dennison wrote: ......... >I think this shows quite clearly that the Society is, and always >has been, very much in favour of as many people as possible >experimenting for as long as possible on this interesting band. ....... This was never in any doubt Mike from fair-minded hams. John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2494 invoked from network); 13 Dec 2000 18:15:42 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 13 Dec 2000 18:15:42 -0000 Received: (qmail 7229 invoked from network); 13 Dec 2000 18:18:31 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 13 Dec 2000 18:18:31 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146GJt-0002pP-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Dec 2000 18:08:01 +0000 Received: from ewey-rwcmta.excite.com ([198.3.99.191] helo=ewey.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146GJq-0002pH-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Dec 2000 18:07:58 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from almond.excite.com ([199.172.148.82]) by ewey.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001213180710.GMQE9549.ewey.excite.com@almond.excite.com> for ; Wed, 13 Dec 2000 10:07:10 -0800 Message-ID: <6342827.976730830648.JavaMail.imail@almond.excite.com> Date: Wed, 13 Dec 2000 10:07:07 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: CFH recordings MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 213.104.154.238 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I will Rik. Where do we get the software? John, G4CNN _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29773 invoked from network); 13 Dec 2000 15:40:55 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 13 Dec 2000 15:40:55 -0000 Received: (qmail 28391 invoked from network); 13 Dec 2000 15:35:49 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 13 Dec 2000 15:35:49 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146DrV-000294-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Dec 2000 15:30:33 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from [213.2.16.106] (helo=rsgb.org.uk) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146DrV-00028z-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Dec 2000 15:30:33 +0000 Received: from miked by rsgb.org.uk with SMTP (MDaemon.v2.8.7.5.R) for ; Wed, 13 Dec 2000 15:18:30 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Wed, 13 Dec 2000 15:18:27 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: Re. 72KHz etc. Message-ID: <3A379343.2621.1186593@localhost> In-reply-to: <000701c06462$4376b6c0$137f883e@lvm> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org X-Return-Path: miked@mail.rsgbhq Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > the B@K amp. didnt like the load and its now only giving me > half power,so I guess I will be in listening mode now for a bit > 73s Laurie. Although these amps are very sturdy, I have blown a couple up. On both occasions only the output transistors blew. They are very cheap to replace. Good luck. 73 Mike, G3XDV (IO91VT) http://www.lf.thersgb.net From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17710 invoked from network); 13 Dec 2000 15:04:22 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 13 Dec 2000 15:04:22 -0000 Received: (qmail 23220 invoked from network); 13 Dec 2000 15:06:32 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 13 Dec 2000 15:06:32 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146DOE-0001zh-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Dec 2000 15:00:18 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from [213.2.16.106] (helo=rsgb.org.uk) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146DOD-0001zc-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Dec 2000 15:00:17 +0000 Received: from miked by rsgb.org.uk with SMTP (MDaemon.v2.8.7.5.R) for ; Wed, 13 Dec 2000 14:52:09 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Wed, 13 Dec 2000 14:52:07 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: CFH recordings Message-ID: <3A378D17.14573.100488F@localhost> In-reply-to: <3.0.1.16.20001213132200.0847fa8a@mail.cc.kuleuven.ac.be> References: <00121114392101.00328@Penguin> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org X-Return-Path: miked@mail.rsgbhq Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > If CFH remains on carrier for the next days it might be interesting to > have a 'CFH recording night' where we try to get CFH recordings from a > number of different locations at the same time. Using the eclipse > software anyone with a PC & soundcard can make a recording when CFH is > transmitting a carrier. What about this idea, who wants to join the > experiment ? > > 73, Rik ON7YD Rik, A good idea. I will be happy to help, though any graph will be of relative, not absolute, measurements. For those who do not know, the excellent Eclipse software can be found at: http://hamradio.nikhef.nl/tech/prog/eclipse.htm Mike, G3XDV (IO91VT) http://www.lf.thersgb.net From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4011 invoked from network); 13 Dec 2000 14:54:35 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 13 Dec 2000 14:54:35 -0000 Received: (qmail 28946 invoked from network); 13 Dec 2000 14:57:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 13 Dec 2000 14:57:26 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146DAf-0001vc-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Dec 2000 14:46:17 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from [213.2.16.106] (helo=rsgb.org.uk) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146DAb-0001vX-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Dec 2000 14:46:14 +0000 Received: from miked by rsgb.org.uk with SMTP (MDaemon.v2.8.7.5.R) for ; Wed, 13 Dec 2000 14:40:55 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Wed, 13 Dec 2000 14:40:52 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: Re: Re: 73 khz permits Message-ID: <3A378A74.26297.F5FD8F@localhost> In-reply-to: <000701c06141$5e2dc400$37da893e@default> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org X-Return-Path: miked@mail.rsgbhq Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: To clarify the 73kHz permit situation once and for all, for the benefit of Mal and anyone else who is confused, the RSGB has never issued Notices of Variation for the 73kHz band. These were, and still are, issued by the Radiocommunications Agency. I can appreciate there may be some confusion as, in order to speed up the original applications, the RSGB offerred to help the RA by processing the original paperwork. The NoVs were, however, issued by the RA. When the life of the band was first extended, this was done on the RA's insistence that no new NoVs would be issued. The recent three-year extension and additional Novs were the result of a detailed proposal made by the RSGB. To quote the RA's press release: ------------- The reasoning behind the Agency acceding to this request from the Radio Society of Great Britain (RSGB) is as follows: Experimentation on 73kHz has been slower than anticipated due to the high-noise floor towards the top end of the allocation. There have been recent developments within Europe to allow reception on 73kHz and transmission on 136kHz Additional work is being undertaken on how propagation is affected by the current enhanced solar flare activity and an opportunity to experiment with large antennas has been provided by the de-commissioning of the Decca Navigation System. --------------- I think this shows quite clearly that the Society is, and always has been, very much in favour of as many people as possible experimenting for as long as possible on this interesting band. What a pity that of the several hundred Novs issued initially, only a handful were ever used. Mike, G3XDV (IO91VT) http://www.lf.thersgb.net From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1379 invoked from network); 13 Dec 2000 13:36:21 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 13 Dec 2000 13:36:21 -0000 Received: (qmail 21028 invoked from network); 13 Dec 2000 13:31:15 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 13 Dec 2000 13:31:15 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146Bsn-0001Yy-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Dec 2000 13:23:45 +0000 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146Bsl-0001Yt-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Dec 2000 13:23:43 +0000 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail.cc.kuleuven.ac.be (8.9.3/8.9.0) with SMTP id OAA449054 for ; Wed, 13 Dec 2000 14:23:31 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3.0.1.16.20001213151516.2077711e@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Wed, 13 Dec 2000 15:15:16 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: CFH recordings In-reply-to: <3.0.1.16.20001213132200.0847fa8a@mail.cc.kuleuven.ac.be> References: <00121114392101.00328@Penguin> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I got already some direct replies on my previous mail. The aim would be that the CHF signal is recorded at several locations (all over Europe) during the same period. I think that we should take a night at the beginning of next week, maybe monday 18 december from 20UTC - 07UTC (tuesday). I just checked the UBA webpage and saw the eclipse software is not longer downloadable, those who need this software can sent me a mail and I will send you the software per e-mail on friday. 73, Rik ON7YD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8174 invoked from network); 13 Dec 2000 11:38:16 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 13 Dec 2000 11:38:16 -0000 Received: (qmail 28848 invoked from network); 13 Dec 2000 11:40:25 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 13 Dec 2000 11:40:25 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 146A6z-000157-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Dec 2000 11:30:17 +0000 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 146A6v-000152-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Dec 2000 11:30:13 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail.cc.kuleuven.ac.be (8.9.3/8.9.0) with SMTP id MAA683030 for ; Wed, 13 Dec 2000 12:30:02 +0100 Message-ID: <3.0.1.16.20001213132200.0847fa8a@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Wed, 13 Dec 2000 13:22:00 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: LF: CFH recordings In-reply-to: <00121114392101.00328@Penguin> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Last friday I took advantage of the fact that CFH was transmitting a steady carrier to record the signal using the eclipse software of ON5OO. The recordings of Alan and me overlap from 00 to 07 UTC (saturday morning) and I put them both in one picture. The result is very strange, despite the fact that our locations are only 266km separated the recordings are very different. Have a look at : http://www.qsl.net/on7yd/136cfbh.htm#Comp If CFH remains on carrier for the next days it might be interesting to have a 'CFH recording night' where we try to get CFH recordings from a number of different locations at the same time. Using the eclipse software anyone with a PC & soundcard can make a recording when CFH is transmitting a carrier. What about this idea, who wants to join the experiment ? 73, Rik ON7YD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23067 invoked from network); 13 Dec 2000 09:26:10 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 13 Dec 2000 09:26:10 -0000 Received: (qmail 28561 invoked from network); 13 Dec 2000 09:28:58 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 13 Dec 2000 09:28:58 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14685x-0000Xt-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Dec 2000 09:21:05 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14685t-0000Xo-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Dec 2000 09:21:01 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id JAA20122; Wed, 13 Dec 2000 09:21:21 GMT Received: (qmail 5411 invoked from network); 13 Dec 2000 10:16:11 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 13 Dec 2000 10:16:11 -0000 Received: by gauntlet.mail.dera.gov.uk; id KAA12633; Wed, 13 Dec 2000 10:10:58 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma012573; Wed, 13 Dec 00 10:10:34 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id ; Wed, 13 Dec 2000 09:22:00 +0000 Received: by frn-gold-1.dera.gov.uk with Internet Mail Service (5.0.1460.8) id ; Wed, 13 Dec 2000 09:20:22 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D7488@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: "LF Group \(E-mail\)" , "KZY \(E-mail\)" Subject: LF: DDS Board supplies and PSK sidebands Date: Wed, 13 Dec 2000 09:20:27 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/html; charset=windows-1252 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Thanks to the recent RadCom article, the first batch of DDS boards has now sold out and a second set have been ordered from the PCB manufacturers.    We bought the entire stock of AD9850 chips from one UK supplier (13) and these are being mounted on the PCBs at this moment.
 
We hope to produce a version of this frequency source using the AD9851 chip soon.  Although deliveries of this chip are slow, they should arrive by March 2001.  The AD9851 differs from the AD9850 chip by operating at a higher clock frequency, up to 180MHZ, BUT has an internal x6 multiplier allowing it to be driven with a 20MHz clock signal.  This removes one problem users have found, that of trying to find packaged oscillators in the 100MHz region.   One of these boards as the source would solve the 100Hz step problem on the "New PC based 1750 Meter Transmitter" mentioned in earlier EMails.   Complete kits and made up boards can now be supplied on request.     Contact HF-INST.CO.UK     tel    (0)1420 590000
 
I have been considering the key click problem when using BPSK with switching transmitters.  Traditionally, amplitude shaping is used to limit the transmitted bandwidth of PSK signals, but this is not a valid solution for class E Txs . Dave's idea of going part way there by ramping the PSU to the driver chips to generate Pulse Width Mod being only a temporary solution.  PWM of the drive waveform does not linearly control the amplitude of the RF component which varies with pulse width in a SIN(X) / X manner.
 
Has anyone any experience of systems that ramp the phase slowly in lieu of the amplitude ?    My feeling is that this will give a similar result to amplitude shaping, but the text books don't cover PSK bandwidth control using a constant amplitude waveform. 
 
Andy G4JNT


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 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23867 invoked from network); 13 Dec 2000 06:53:32 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 13 Dec 2000 06:53:32 -0000 Received: (qmail 8226 invoked from network); 13 Dec 2000 06:48:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 13 Dec 2000 06:48:26 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1465bL-0008Sp-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Dec 2000 06:41:19 +0000 Received: from mta00.talk21.com ([62.172.192.40] helo=t21mta00-app.talk21.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1465bJ-0008Sk-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Dec 2000 06:41:18 +0000 Received: from dave ([213.120.9.205]) by t21mta00-app.talk21.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001213063928.MDHF10093.t21mta00-app.talk21.com@dave> for ; Wed, 13 Dec 2000 06:39:28 +0000 Message-ID: <000a01c064cf$7a76fc80$cd0978d5@dave> From: "Dave Sergeant" To: "rsgb_lf_group" References: <003501c06428$f70a7120$ac6101d5@default> <003d01c06444$ded9e6f0$0a00a8c0@ThreeLakes.ca> Subject: LF: Re: TransAtlantic CW operation Date: Wed, 13 Dec 2000 06:39:07 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: >From Dave G3YMC Larry Kayser wrote: >Jack is a conventional CW operator >with renouned weak signal receiving skills on 160. He does not have >Internet or Computer assisted receiving capabilities. Anyone wanting >a regular CW schedule on LF should get in touch with Jack. Jack VE1ZZ is one signal I would have no objection to beaconing in the normal CW sub-band and I would dearly love a VE station to transmit some normal CW on the band, you never know, and surely now is the time of year to try. If normal CW transatlantic is possible then Jack will the be the first to succeed - I have worked him several times on 160 with my bit of string. As many of you will know I share Jack's distaste of slow CW. No need for skeds, but I listen every morning between 0600 and 0800z or so. Cheers Dave sergeantd@compuserve.com dsergeant@iee.org http://ourworld.compuserve.com/homepages/sergeantd From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20476 invoked from network); 12 Dec 2000 23:02:26 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 12 Dec 2000 23:02:26 -0000 Received: (qmail 4211 invoked from network); 12 Dec 2000 23:05:12 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 12 Dec 2000 23:05:12 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145yDj-0006ca-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Dec 2000 22:48:27 +0000 Received: from mta07-svc.ntlworld.com ([62.253.162.47]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145yDh-0006cV-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 22:48:26 +0000 Received: from compaq ([62.255.98.171]) by mta07-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001212224811.PYNJ16684.mta07-svc.ntlworld.com@compaq> for ; Tue, 12 Dec 2000 22:48:11 +0000 Message-ID: <000801c0648d$a1a0a500$ab62ff3e@compaq> From: "tracey.gardner" To: "RSGB LF Group" Subject: LF: Beacon-I0CFE Date: Tue, 12 Dec 2000 22:48:21 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: As I thought, Finbar no longer subscribes to this list. He has asked me to reply for him saying that he will move the beacon below 136 khz tomorrow and try to make the keying more user friendly. 73s Tracey From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5446 invoked from network); 12 Dec 2000 17:40:06 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 12 Dec 2000 17:40:06 -0000 Received: (qmail 14904 invoked from network); 12 Dec 2000 17:42:18 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 12 Dec 2000 17:42:18 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145tKG-0005My-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Dec 2000 17:34:52 +0000 Received: from mail11.svr.pol.co.uk ([195.92.193.23]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145tKC-0005Ms-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 17:34:48 +0000 Received: from modem-19.ar-pharazon.dialup.pol.co.uk ([62.136.127.19] helo=lvm) by mail11.svr.pol.co.uk with smtp (Exim 3.13 #0) id 145tK3-00086J-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 17:34:40 +0000 Message-ID: <000701c06462$4376b6c0$137f883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. 72KHz etc. Date: Tue, 12 Dec 2000 17:37:13 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Thanks Mike for the suggestions,I am sure you are right,the insulators were covered with salt spray and so was the rope!  I have repaired the Ant. but the
B@K amp. didnt like the load and its now only giving me half power,so I guess I will be in listening mode now for a bit (still OK on 136 of course with Daves Decca),
Perhaps there will be some Transatlantic activity soon.
Sorry about the virus,hope all will be well soon.73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26665 invoked from network); 12 Dec 2000 17:10:47 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 12 Dec 2000 17:10:47 -0000 Received: (qmail 10434 invoked from network); 12 Dec 2000 17:12:58 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 12 Dec 2000 17:12:58 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145sns-0005F2-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Dec 2000 17:01:24 +0000 Received: from mta07-svc.ntlworld.com ([62.253.162.47]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145snr-0005Ex-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 17:01:23 +0000 Received: from oemcomputer ([213.104.96.216]) by mta07-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001212170106.KQRK16684.mta07-svc.ntlworld.com@oemcomputer> for ; Tue, 12 Dec 2000 17:01:06 +0000 Message-ID: <007f01c0645d$0a8999e0$d86068d5@oemcomputer> From: "mike.dennison" To: rsgb_lf_group@blacksheep.org References: <000701c062ae$f389cda0$c083883e@lvm> Subject: LF: Re: Re. 72Khz etc, Date: Tue, 12 Dec 2000 17:00:19 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I dont know how to calculate the voltage at the end of a top loading wire,but I use two ribbed ceramic insulators with a peice of terelene rope (5mm) between.The rope has burnt through!!! Guess our authorities knew a thing or two when they allowed us 1W ERP. bet they thought they will never get there,mebbe they were right. Hi. 73s Laurie.. I had this problem when I used just plastic string as an insulator. I solved the problem by using loops of white cable tie as insulators. As you are near the sea, you may have the same trouble as Mike, GW4HXO. His insulators were covered in salt (I tasted one!!). Perhaps some grease on the insulator will help. Mike, G3XDV PS. I did not get on 73k last Friday as my virus got really bad and I have only now got out of bed. Should be active next Friday. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28468 invoked from network); 12 Dec 2000 16:50:39 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 12 Dec 2000 16:50:39 -0000 Received: (qmail 9872 invoked from network); 12 Dec 2000 16:52:47 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 12 Dec 2000 16:52:47 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145sPb-00057z-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Dec 2000 16:36:19 +0000 Received: from imo-d05.mx.aol.com ([205.188.157.37]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145sPW-00057r-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 16:36:15 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from WarmSpgs@aol.com by imo-d05.mx.aol.com (mail_out_v28.34.) id l.b9.9810e0f (3977) for ; Tue, 12 Dec 2000 11:35:33 -0500 (EST) From: WarmSpgs@aol.com Message-ID: Date: Tue, 12 Dec 2000 11:35:33 EST Subject: Re: LF: Fw: [Lowfer] New PC based 1750 Meter Transmitter (Product) To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Windows AOL sub 117 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In a message dated 12/12/00 3:53:19 AM Eastern Standard Time, tracey.gardner@ntlworld.com writes: << We would of course need much finer steps than 100Hz. >> It would help on this side of the pond, too, now that you mention it. The power line controller signals we have to contend with here tend to also be found at 100 Hertz intervals. It would be very useful to be able to slip between them. 73, John From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17613 invoked from network); 12 Dec 2000 14:30:46 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 12 Dec 2000 14:30:46 -0000 Received: (qmail 2105 invoked from network); 12 Dec 2000 14:32:58 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 12 Dec 2000 14:32:58 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145qOx-0004Zq-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Dec 2000 14:27:31 +0000 Received: from tungsten.btinternet.com ([194.73.73.81]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145qOu-0004Zl-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 14:27:28 +0000 Received: from [62.7.22.49] (helo=default) by tungsten.btinternet.com with smtp (Exim 3.03 #83) id 145qOn-000349-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 14:27:22 +0000 Message-ID: <004301c06446$fad00900$ac6101d5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: re I0CFE again....or was it? Date: Tue, 12 Dec 2000 14:21:55 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Mike, nice sig in qso with Tom. I noticed that I had a signal on the waterfall at 136.225kHz and read I0CFE at about 549 at 1111z. Marathon had disappeared with me (well just see a 'shadow' with a bit of imagination) and there was just a ghost of a line from CFH. Then I had a thought.....could it be that it is EI0CF Finbar, back again, its about the strength I wouldd expect him to be in daytime?? Whoops.... Cheers de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7266 invoked from network); 12 Dec 2000 14:18:42 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 12 Dec 2000 14:18:42 -0000 Received: (qmail 27986 invoked from network); 12 Dec 2000 14:21:28 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 12 Dec 2000 14:21:28 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145q9L-0004Vc-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Dec 2000 14:11:23 +0000 Received: from tomts5.bellnexxia.net ([209.226.175.25] helo=tomts5-srv.bellnexxia.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145q9I-0004VS-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 14:11:21 +0000 Received: from server1 ([216.209.138.165]) by tomts5-srv.bellnexxia.net (InterMail vM.4.01.03.00 201-229-121) with SMTP id <20001212141043.HBKQ1373.tomts5-srv.bellnexxia.net@server1> for ; Tue, 12 Dec 2000 09:10:43 -0500 Message-ID: <003d01c06444$ded9e6f0$0a00a8c0@ThreeLakes.ca> From: "Larry Kayser" To: rsgb_lf_group@blacksheep.org References: <003501c06428$f70a7120$ac6101d5@default> Subject: LF: TransAtlantic CW operation Date: Tue, 12 Dec 2000 09:07:25 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Greetings: I have a note from a chap who tells me that there is someone on here who wants to try regular CW over the North Atlantic. I do not see all the messages on this reflector but just in case it needs to be said again.... Jack, VE1ZZ, is one of the worlds pre-eminent 160 Meter DXers and has been on 136 kHz CW for many months now. He has worked up and down the east coast of the USA on 136 kHz and has even been apparently "seen" in the UK during one of the big openings last September. Jack is a conventional CW operator with renouned weak signal receiving skills on 160. He does not have Internet or Computer assisted receiving capabilities. Anyone wanting a regular CW schedule on LF should get in touch with Jack. I have a note here that Jack has little interest in QRS CW as well as it is to hard on his tube type transmitter. Good Luck Larry VA3LK From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13026 invoked from network); 12 Dec 2000 14:00:05 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 12 Dec 2000 14:00:05 -0000 Received: (qmail 18041 invoked from network); 12 Dec 2000 14:02:55 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 12 Dec 2000 14:02:55 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145pm1-0004Oz-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Dec 2000 13:47:17 +0000 Received: from mail4.svr.pol.co.uk ([195.92.193.211]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145plx-0004Ou-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 13:47:14 +0000 Received: from modem-182.edoras.dialup.pol.co.uk ([62.136.171.182] helo=lvm) by mail4.svr.pol.co.uk with smtp (Exim 3.13 #0) id 145plp-0001Vo-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 13:47:08 +0000 Message-ID: <002801c06442$78bac8a0$b6ab883e@lvm> From: "LAWRENCE MAYHEAD" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Beacon/136.25kHz/Correction Date: Tue, 12 Dec 2000 13:49:53 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Yes, thought it was an Italian station for a while Hi. -----Original Message----- From: Michael Probert To: lf group Date: 12 December 2000 12:32 Subject: LF: Beacon/136.25kHz/Correction >Hello all, >Just been chatting to Tom G3OLB, huge signal here with his new QRO TX,and >the signal we are hearing is EI0CF in beacon mode! I'm not sure if all the >water here has affected my head and hence my CW but it sure sounds as if the >"E" is at the end of the call. Did it fool you too Laurie? >Regards >Mike GW4HXO. > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1201 invoked from network); 12 Dec 2000 13:35:45 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 12 Dec 2000 13:35:45 -0000 Received: (qmail 817 invoked from network); 12 Dec 2000 13:30:44 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 12 Dec 2000 13:30:44 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145p9T-0004Ed-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Dec 2000 13:07:27 +0000 Received: from mta02-svc.ntlworld.com ([62.253.162.42]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145p9Q-0004EY-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 13:07:24 +0000 Received: from compaq ([62.255.97.161]) by mta02-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001212130717.JJSL5045.mta02-svc.ntlworld.com@compaq> for ; Tue, 12 Dec 2000 13:07:17 +0000 Message-ID: <003801c0643c$760924e0$a161ff3e@compaq> From: "tracey.gardner" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Re: Beacon-I0CFE Date: Tue, 12 Dec 2000 13:07:19 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I'm not sure if Finbar is subscribed to this list at the moment so I've copied the couple of messages relating to his beacon to him. 73s Tracey > >It is EI0CF - Finbar's slow keying with large gaps between the >characters makes it a little hard to copy. > >Another beacon operating for long periods within the 136.0-137.4 >normal CW portion of the band, Finbar please note. > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11209 invoked from network); 12 Dec 2000 12:28:01 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 12 Dec 2000 12:28:01 -0000 Received: (qmail 15893 invoked from network); 12 Dec 2000 12:30:09 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 12 Dec 2000 12:30:09 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145oRM-00042G-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Dec 2000 12:21:52 +0000 Received: from finch-post-10.mail.demon.net ([194.217.242.38]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145oRL-000429-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 12:21:51 +0000 Received: from boxernet.demon.co.uk ([194.222.47.214] helo=TRIXY) by finch-post-10.mail.demon.net with smtp (Exim 2.12 #1) id 145oRB-000NcN-0A for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 12:21:42 +0000 From: "Michael Probert" To: "lf group" Subject: LF: Beacon/136.25kHz/Correction Date: Tue, 12 Dec 2000 11:25:23 -0800 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Importance: Normal Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello all, Just been chatting to Tom G3OLB, huge signal here with his new QRO TX,and the signal we are hearing is EI0CF in beacon mode! I'm not sure if all the water here has affected my head and hence my CW but it sure sounds as if the "E" is at the end of the call. Did it fool you too Laurie? Regards Mike GW4HXO. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 638 invoked from network); 12 Dec 2000 12:15:24 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 12 Dec 2000 12:15:24 -0000 Received: (qmail 946 invoked from network); 12 Dec 2000 12:18:14 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 12 Dec 2000 12:18:14 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145oH1-0003yt-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Dec 2000 12:11:11 +0000 Received: from mta02.talk21.com ([62.172.192.41] helo=t21mta02-app.talk21.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145oGy-0003yl-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 12:11:09 +0000 Received: from dave ([213.120.47.61]) by t21mta02-app.talk21.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001212120758.CHMC17544.t21mta02-app.talk21.com@dave> for ; Tue, 12 Dec 2000 12:07:58 +0000 Message-ID: <000001c06434$6208e140$3d2f78d5@dave> From: "Dave Sergeant" To: rsgb_lf_group@blacksheep.org References: Subject: LF: Re: Beacon-I0CFE Date: Tue, 12 Dec 2000 08:54:15 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Mike and the rest >The above was received last night at about 23.00 GMT on 136.25kHz at5/4/9. >Still there this morning, slightly weaker. Anyone else hearing him? It is EI0CF - Finbar's slow keying with large gaps between the characters makes it a little hard to copy. Another beacon operating for long periods within the 136.0-137.4 normal CW portion of the band, Finbar please note. Cheers Dave G3YMC sergeantd@compuserve.com dsergeant@iee.org http://ourworld.compuserve.com/homepages/sergeantd From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7050 invoked from network); 12 Dec 2000 12:01:23 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 12 Dec 2000 12:01:23 -0000 Received: (qmail 22684 invoked from network); 12 Dec 2000 12:03:31 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 12 Dec 2000 12:03:31 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145nu8-0003tK-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Dec 2000 11:47:32 +0000 Received: from cmailg1.svr.pol.co.uk ([195.92.195.171]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145nu6-0003tF-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 11:47:30 +0000 Received: from modem-84.anglachel.dialup.pol.co.uk ([62.136.112.84] helo=lvm) by cmailg1.svr.pol.co.uk with smtp (Exim 3.13 #0) id 145ntz-0004in-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 11:47:24 +0000 Message-ID: <000701c06431$c015c080$5470883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. Beacon I0CFE Date: Tue, 12 Dec 2000 11:50:06 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Hi All,
Yes beacon I0CFE audible here 5/5/9 last 2, hours still going!
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15212 invoked from network); 12 Dec 2000 11:39:14 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 12 Dec 2000 11:39:14 -0000 Received: (qmail 26634 invoked from network); 12 Dec 2000 11:34:13 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 12 Dec 2000 11:34:13 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145naS-0003n3-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Dec 2000 11:27:12 +0000 Received: from tomts5.bellnexxia.net ([209.226.175.25] helo=tomts5-srv.bellnexxia.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145naP-0003my-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 11:27:09 +0000 Received: from server1 ([216.209.138.77]) by tomts8-srv.bellnexxia.net (InterMail vM.4.01.03.00 201-229-121) with SMTP id <20001212031613.EGOT1115.tomts8-srv.bellnexxia.net@server1> for ; Mon, 11 Dec 2000 22:16:13 -0500 Message-ID: <001801c063e9$6fd0f970$0a00a8c0@ThreeLakes.ca> From: "Larry Kayser" To: rsgb_lf_group@blacksheep.org References: Subject: LF: Re: Transatlantic, Markus Vester Date: Mon, 11 Dec 2000 22:12:55 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Markus wrote > as Alan has observed before, transatlantic condx appear to be quite good > lately. Last night's spectrogram showed CFH on 137.742 peaking 26 dBuV/m I trust your meaning 137.042. This tone cum carrier is not particlarly clean as I am seeing several other weak modulation components in the regular passband of CFH. Larry VA3LK From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26858 invoked from network); 12 Dec 2000 11:07:12 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 12 Dec 2000 11:07:12 -0000 Received: (qmail 12542 invoked from network); 12 Dec 2000 11:09:20 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 12 Dec 2000 11:09:20 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145n38-0003ec-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Dec 2000 10:52:46 +0000 Received: from [194.73.73.138] (helo=ruthenium) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145n34-0003eX-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 10:52:42 +0000 Received: from [213.1.84.231] (helo=default) by ruthenium with smtp (Exim 3.03 #83) id 145n2x-000281-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 10:52:36 +0000 Message-ID: <003501c06428$f70a7120$ac6101d5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: re Beacon I0CFE Date: Tue, 12 Dec 2000 10:42:45 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Mike that is very interesting. I have just posted last nights CFH plot to Rik and it is another very high sig-level night ( over 40dBu for nearly 10hours!! ). Laurie has just sent me a strange chart recording of CFH and SXV (Marathon) which shows a coincident peak in signal strength of both stations at about 0200z on the night of 1/2 Dec. It is a little odd as the 'solar time' at the centre of the two paths is very different. I wonder if this indicates that these high levels are the result of the 'last throes' of the CME injected particles in the D-layer? It would be nice to monitor SXV as well as CFH but I am running out of receivers! Cheers de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14610 invoked from network); 12 Dec 2000 09:01:21 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 12 Dec 2000 09:01:21 -0000 Received: (qmail 10458 invoked from network); 12 Dec 2000 09:03:29 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 12 Dec 2000 09:03:29 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145l4y-0003Az-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Dec 2000 08:46:32 +0000 Received: from mta05-svc.ntlworld.com ([62.253.162.45]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145l4x-0003Au-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 08:46:31 +0000 Received: from compaq ([62.253.87.253]) by mta05-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001212084624.GNJT8632.mta05-svc.ntlworld.com@compaq> for ; Tue, 12 Dec 2000 08:46:24 +0000 Message-ID: <005b01c06418$0438d500$fd57fd3e@compaq> From: "tracey.gardner" To: "RSGB LF Group" Subject: LF: Fw: [Lowfer] New PC based 1750 Meter Transmitter (Product) Date: Tue, 12 Dec 2000 08:46:21 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: This message came up on the Lowfer list but I thought that it might be of interest here. Marko of PCS Electronics says that he could easily modify the card to work on 136kHz, if there is the demand, of course. He says that its just a matter of a software change and a small modification to the unit which can be done very easily. We would of course need much finer steps than 100Hz. 73s Tracey -----Original Message----- From: les@highnoonfilm.com To: lowfer@qth.net Date: 04 December 2000 20:08 Subject: [Lowfer] New PC based 1750 Meter Transmitter (Product) > >For those of you who have been looking for an inexpensive 1750 Meter >transmitter may be interested >in a new product called the "LW-MAX" designed by PCS Electronics. Photos of >the board and more information >can be found at: > >http://www.pcs-electronics.com/Products/hams.shtml > >The transmitter is based on their PC-MAX FM transmitter concept, it that it >uses an IBM PC >and a PSA slotted card as the transmitter. Software totally controls the >operation of the card, >making it easy to upgrade and add modes, features, etc. > >I've been working with the circuit designer to test both hardware and >software, having put a working >prototype board on the air already. The software drivers is already >available for download and >evaluation from their main index page: > >http://www.pcs-electronics.com/ > >The file is very large at over 7 Megabytes, and is undergoing revisions as >we speak, so you may want to >delay trying it out. It will function without the card installed for those >who want to look at the operation >of the unit. > >The transmitter currently supports CW operation at speeds of up to 12wpm >and also QRSS operation >in three modes, including one that allows the user to select the "dash" >length and then the software >will automatically adjust dot length, character spacing, etc. > >Another nice feature is the ability to use the software to "power step" >your beacon. For instance, you can >transmit for 1 minute at full power, then 1 minute at half power (500mw), 1 >minute at one quarter power (250mw), >etc. This allows listeners to evaluate band conditions. Very nice! > >The unit comes fully assembled, with software included. You need to connect >the transmitter to >your lowfer antenna using a coaxial cable. While the unit will operate this >way, to be legal you'd >need to construct a final amp to mount at the base of the antenna. (such as >Lyle's simple push >pull amp). > >Some who are aware of this project have already pointed out that it is not >totally legal to "make" a >1750 meter transmitter, even as a kit. We won't debate that...but I will >say that never stopped others >like Palomar Engineers, Curry Communications, LF Engineering, etc. > >Using the LW-MAX you still have to build the loading coil, antenna, and >ground system...so it's >hardly plug and play, but it will get you on the air quick. Selling price >is $120 plus shipping. > >I am expected arrival of the final hardware within a few days, and will >post a review of the unit >then. The prototype performed well, with some problems noted in the output >filters. Marko assures >me that these have since been corrected. > >Future software revisions may support BPSK operation...and PCS Electronics >has promised to >make the source code of the driver freely available so that those like Bill >de Carle can modify >it as they wish. > >While this product is based on my original idea, I am not financially or >legally involved in the project. >I am working with PCS Electronics to test both hardware and software, and >have contributed to >the writing of the manual. > > >Les Rayburn, N1LF >4919 Cox Cove >Helena, AL 35080 >XMGR 189.500khz > > > >To unsubscribe, send to MAJORDOMO@qth.net "unsubscribe lowfer" (Do not >send to list!!) Send on list submissions to lowfer@qth.net From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9368 invoked from network); 12 Dec 2000 08:27:03 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 12 Dec 2000 08:27:03 -0000 Received: (qmail 12627 invoked from network); 12 Dec 2000 08:29:14 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 12 Dec 2000 08:29:14 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145kf6-00034U-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Dec 2000 08:19:48 +0000 Received: from tele-post-20.mail.demon.net ([194.217.242.20]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145kf5-00034P-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 08:19:47 +0000 Received: from boxernet.demon.co.uk ([194.222.47.214] helo=TRIXY) by tele-post-20.mail.demon.net with smtp (Exim 2.12 #2) id 145kev-000Ivq-0K for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 08:19:38 +0000 From: "Michael Probert" To: "lf group" Subject: LF: Beacon-I0CFE Date: Tue, 12 Dec 2000 07:23:18 -0800 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Importance: Normal Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello All, The above was received last night at about 23.00 GMT on 136.25kHz at5/4/9. Still there this morning, slightly weaker. Anyone else hearing him? Regards Mike-GW4HXO. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24797 invoked from network); 12 Dec 2000 08:26:01 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 12 Dec 2000 08:26:01 -0000 Received: (qmail 12300 invoked from network); 12 Dec 2000 08:28:51 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 12 Dec 2000 08:28:51 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145kb1-00034H-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Dec 2000 08:15:35 +0000 Received: from imo-d03.mx.aol.com ([205.188.157.35]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145kb0-00034C-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 08:15:34 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from MarkusVester@aol.com by imo-d03.mx.aol.com (mail_out_v28.34.) id l.d9.d893fa6 (4554) for ; Tue, 12 Dec 2000 03:14:54 -0500 (EST) From: MarkusVester@aol.com Message-ID: Date: Tue, 12 Dec 2000 03:14:53 EST Subject: LF: CFH freq and line underneath To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Windows AOL sub 68 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi group, Larry wrote: > I trust your meaning 137.042. yes, that was a typo, tnx. Wolf wrote: > Now there is an other carrier crawling out of the heavy local QRN at the same > time as CFH, its frequency is 44.83 Hz below the strong carrier. I'm not > shure what it is, perhaps someone else knows more. I've seen that single line one 136.997 here quite often, also during the day when modulated CFH was low. First I thought it was local, but then realized its variing fieldstrength, perhaps another commercial TX-intermodulation. Could someone with a DF-loop give hints ? Markus, DF6NM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21945 invoked from network); 12 Dec 2000 01:09:04 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 12 Dec 2000 01:09:04 -0000 Received: (qmail 881 invoked from network); 12 Dec 2000 01:11:16 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 12 Dec 2000 01:11:16 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145doB-0001UU-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Dec 2000 01:00:43 +0000 Received: from tomts8.bellnexxia.net ([209.226.175.52] helo=tomts8-srv.bellnexxia.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145do9-0001UN-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Dec 2000 01:00:42 +0000 Received: from server1 ([209.226.189.43]) by tomts8-srv.bellnexxia.net (InterMail vM.4.01.03.00 201-229-121) with SMTP id <20001212010004.CEEO1115.tomts8-srv.bellnexxia.net@server1> for ; Mon, 11 Dec 2000 20:00:04 -0500 Message-ID: <005201c063d6$6a382730$0a00a8c0@ThreeLakes.ca> From: "Larry Kayser" To: rsgb_lf_group@blacksheep.org References: Subject: LF: Re: Transatlantic Date: Mon, 11 Dec 2000 19:56:47 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Markus wrote > as Alan has observed before, transatlantic condx appear to be quite good > lately. Last night's spectrogram showed CFH on 137.742 peaking 26 dBuV/m I trust your meaning 137.042. This tone cum carrier is not particlarly clean as I am seeing several other weak modulation components in the regular passband. Larry VA3LK From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5623 invoked from network); 11 Dec 2000 20:58:57 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 11 Dec 2000 20:58:57 -0000 Received: (qmail 24110 invoked from network); 11 Dec 2000 20:53:55 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 11 Dec 2000 20:53:55 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145ZoG-0000XP-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Dec 2000 20:44:32 +0000 Received: from imo-r09.mx.aol.com ([152.163.225.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145ZoE-0000XH-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Dec 2000 20:44:30 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from DL4YHF@aol.com by imo-r09.mx.aol.com (mail_out_v28.34.) id l.cb.c222023 (7318) for ; Mon, 11 Dec 2000 15:43:46 -0500 (EST) From: DL4YHF@aol.com Message-ID: Date: Mon, 11 Dec 2000 15:43:45 EST Subject: LF: New CFH Modulation .. Thanks for info To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Windows AOL sub 69 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Alan and others, Thanks for the information about the "new" modulation of CFH (or, to be precise, the absence of a modulation). Last weekend I was amazed by the strong carrier on 137.04, and spotted it in the paket cluster. I got a reply from Alan ('NYK) via the cluster that it indeed IS CFH... hope they will keep it this way, because it's much easier to identify and much less "bandwitdh-consuming". Now there is an other carrier crawling out of the heavy local QRN at the same time as CFH, its frequency is 44.83 Hz below the strong carrier. I'm not shure what it is, perhaps someone else knows more. By the way, the longwire at the club station came down again sunday evening... the wet rope couldn't stand the gale force winds. We hope to be QRV again from DF0WD before the weekend. 73's Wolf (DL4YHF). From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24091 invoked from network); 11 Dec 2000 19:33:49 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 11 Dec 2000 19:33:49 -0000 Received: (qmail 2850 invoked from network); 11 Dec 2000 19:28:48 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 11 Dec 2000 19:28:48 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145YOt-0000E2-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Dec 2000 19:14:15 +0000 Received: from cmailg6.svr.pol.co.uk ([195.92.195.176]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145YOs-0000Dx-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Dec 2000 19:14:14 +0000 Received: from modem-78.meitnerium.dialup.pol.co.uk ([62.136.74.206] helo=default) by cmailg6.svr.pol.co.uk with smtp (Exim 3.13 #0) id 145YOT-0000St-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Dec 2000 19:14:08 +0000 Message-ID: <000001c063a5$d5eff380$ce4a883e@default> From: "MAL HAMILTON" To: "rsgb" Subject: LF: Transistor Date: Mon, 11 Dec 2000 18:43:37 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello. Thanks to all that supplied info about my transistor query. I had lots of replies direct and via the reflector. This info is much appreciated. 73 and agn tnx de Mal/G3KEV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1008 invoked from network); 11 Dec 2000 19:26:05 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 11 Dec 2000 19:26:05 -0000 Received: (qmail 12322 invoked from network); 11 Dec 2000 19:28:51 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 11 Dec 2000 19:28:51 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145YP5-0000E9-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Dec 2000 19:14:27 +0000 Received: from cmailg6.svr.pol.co.uk ([195.92.195.176]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145YP4-0000E4-00 for RSGB_lf_group@blacksheep.org; Mon, 11 Dec 2000 19:14:26 +0000 Received: from modem-78.meitnerium.dialup.pol.co.uk ([62.136.74.206] helo=default) by cmailg6.svr.pol.co.uk with smtp (Exim 3.13 #0) id 145YOx-0000St-00 for RSGB_lf_group@blacksheep.org; Mon, 11 Dec 2000 19:14:20 +0000 Message-ID: <000101c063a5$dcbe8140$ce4a883e@default> From: "MAL HAMILTON" To: RSGB_lf_group@blacksheep.org Subject: LF: VE acty Date: Mon, 11 Dec 2000 19:06:39 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi All. Does anyone know if VE1ZZ is active or listening on 136. I have worked him numerous times on 160m and heard he was interested in LF but all has gone quiet lately. At times CFH is blowing my head off but there seems to be no response on CW at the other end. I have not been able to ascertain whether Larry operates CW or uses only machine modes ie psk. Every time as far as I am aware that CW slow or otherwise is mentioned we get no response. I am awaiting some of the big 160m dxers on the east coast USA to get going on LF, until then I cannot get too excited. I did have a report via a 3rd party that my signal has been heard across the atlantic by a /MM also one other and the chap thinks it might have been YXM. It is hard to get exact details because the ship and RO are away most of the time and I get the info via his friend. 73 G3KEV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16493 invoked from network); 11 Dec 2000 18:13:42 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 11 Dec 2000 18:13:42 -0000 Received: (qmail 27029 invoked from network); 11 Dec 2000 18:08:43 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 11 Dec 2000 18:08:43 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145XG6-0008R6-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Dec 2000 18:01:06 +0000 Received: from cmailg3.svr.pol.co.uk ([195.92.195.173]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145XG5-0008R1-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Dec 2000 18:01:05 +0000 Received: from modem-186.titanium.dialup.pol.co.uk ([62.136.21.186] helo=robing) by cmailg3.svr.pol.co.uk with smtp (Exim 3.13 #0) id 145XFz-0005fL-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Dec 2000 18:00:59 +0000 Message-ID: <000001c0639c$61478920$ba15883e@robing> From: "Robin T. Greenwood" To: rsgb_lf_group@blacksheep.org References: <00121112241502.00554@Penguin> Subject: LF: Re: X-tal...wanted ! Date: Mon, 11 Dec 2000 16:23:56 -0000 Organization: - MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Have you got a 3rd overtone xtal on Mhz 32.500 or 31.692 It should oscillate OK. or 5th overtone 54.180 52.820 Robin G3LBA ---- Original Message ----- Hi LF-ers... I just wanted an X-tal for my LF receiver. Frequency is 10836 kHz or 10564 kHz +- some kHz. I need it for the XO in first mixer for the first IF 10,7MHz. Thank you. Best regards...73 de Rich OM2TW From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24059 invoked from network); 11 Dec 2000 15:27:04 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 11 Dec 2000 15:27:04 -0000 Received: (qmail 24131 invoked from network); 11 Dec 2000 15:29:12 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 11 Dec 2000 15:29:12 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145UiL-0007h5-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Dec 2000 15:18:05 +0000 Received: from rubellite.lion-access.net ([212.19.217.4]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145UiH-0007h0-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Dec 2000 15:18:01 +0000 Received: from w8k3f0 (1Cust250.tnt24.rtm1.nl.uu.net [213.116.142.250]) by rubellite.lion-access.net (I-Lab) with SMTP id 134B4280F for ; Mon, 11 Dec 2000 15:17:42 +0000 (GMT) Message-ID: <003201c06387$193655e0$fa8e74d5@w8k3f0> From: "Dick Rollema" To: rsgb_lf_group@blacksheep.org References: <3.0.1.16.20001211131749.21af3474@mail.cc.kuleuven.ac.be> Subject: Re: LF: X-tal...wanted ! Date: Mon, 11 Dec 2000 16:28:25 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: To Allm from PA0SE Rik, ON7YD wrote: > i just had a look in the junkbox ... nothing arround these frequencies here. > If you don't find the 10836 or 10564kHz xtals you might consider using a > xtal on the 3rd overtone, that would be 3612 or 3521kHz. These are > frequencies in the 80m band, so much greater chance to find them among hams. But beware; the overtones are not exact multiples of the fundamental frequency. In the examples above the frequency difference with the third HARMONIC could easily be 10kHz or more. 73, Dick, PA0SE From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4809 invoked from network); 11 Dec 2000 12:59:14 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 11 Dec 2000 12:59:14 -0000 Received: (qmail 25405 invoked from network); 11 Dec 2000 13:01:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 11 Dec 2000 13:01:23 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145SSg-000732-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Dec 2000 12:53:46 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from ns1.swh.sk ([192.108.125.33]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145SSe-00072x-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Dec 2000 12:53:44 +0000 Received: from hermes.swh.sk (hermes [139.24.136.129]) by ns1.swh.sk (8.9.1/8.9.1) with ESMTP id NAA21531 for ; Mon, 11 Dec 2000 13:53:37 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from btss103a.swh.sk (btss103a.swh.sk [139.24.136.27]) by hermes.swh.sk (8.9.3/8.9.2) with ESMTP id NAA25961 for ; Mon, 11 Dec 2000 13:53:34 +0100 (MET) Received: from PENGUIN ([149.202.168.63]) by btss103a.swh.sk with SMTP (Microsoft Exchange Internet Mail Service Version 5.5.2448.0) id XNMSG330; Mon, 11 Dec 2000 13:53:32 +0100 From: "Richard Gasparik" Organization: Siemens Business Services s.r.o. To: rsgb_lf_group@blacksheep.org Subject: LF: QRV again... Date: Mon, 11 Dec 2000 14:35:22 +0100 X-Mailer: KMail [version 1.0.17] Content-Type: text/plain; charset=iso-8859-1; format=flowed MIME-Version: 1.0 Message-ID: <00121114392101.00328@Penguin> Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi LFers... I'll be QRV this weekend on 136kHz. My power amplifier is ready again. I'll start saturday 16.12.2000 at 1200Z until sunday 17.12.2000 1200Z. See you... 73 de Rich OM2TW From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13688 invoked from network); 11 Dec 2000 11:29:51 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 11 Dec 2000 11:29:51 -0000 Received: (qmail 13818 invoked from network); 11 Dec 2000 11:32:38 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 11 Dec 2000 11:32:38 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145R5i-0006gX-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Dec 2000 11:25:58 +0000 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145R5h-0006gS-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Dec 2000 11:25:57 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail.cc.kuleuven.ac.be (8.9.3/8.9.0) with SMTP id MAA457956 for ; Mon, 11 Dec 2000 12:25:51 +0100 Message-ID: <3.0.1.16.20001211131749.21af3474@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Mon, 11 Dec 2000 13:17:49 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: X-tal...wanted ! In-reply-to: <00121112241502.00554@Penguin> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Rich, i just had a look in the junkbox ... nothing arround these frequencies here. If you don't find the 10836 or 10564kHz xtals you might consider using a xtal on the 3rd overtone, that would be 3612 or 3521kHz. These are frequencies in the 80m band, so much greater chance to find them among hams. 73, Rik At 12:20 11/12/00 +0100, you wrote: >Hi LF-ers... > >I just wanted an X-tal for my LF receiver. Frequency is 10836 kHz or 10564 kHz >+- some kHz. I need it for the XO in first mixer for the first IF 10,7MHz. Thank >you. > >Best regards...73 de Rich OM2TW > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14534 invoked from network); 11 Dec 2000 10:50:35 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 11 Dec 2000 10:50:35 -0000 Received: (qmail 3978 invoked from network); 11 Dec 2000 10:45:32 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 11 Dec 2000 10:45:32 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145QM3-0006T9-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Dec 2000 10:38:47 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from ns1.swh.sk ([192.108.125.33]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145QLz-0006T4-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Dec 2000 10:38:43 +0000 Received: from hermes.swh.sk (hermes [139.24.136.129]) by ns1.swh.sk (8.9.1/8.9.1) with ESMTP id LAA14915 for ; Mon, 11 Dec 2000 11:38:32 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from btss103a.swh.sk (btss103a.swh.sk [139.24.136.27]) by hermes.swh.sk (8.9.3/8.9.2) with ESMTP id LAA08264 for ; Mon, 11 Dec 2000 11:38:28 +0100 (MET) Received: from PENGUIN ([149.202.168.90]) by btss103a.swh.sk with SMTP (Microsoft Exchange Internet Mail Service Version 5.5.2448.0) id XNMSG3M5; Mon, 11 Dec 2000 11:38:27 +0100 From: "Richard Gasparik" Organization: Siemens Business Services s.r.o. To: rsgb_lf_group@blacksheep.org Subject: LF: X-tal...wanted ! Date: Mon, 11 Dec 2000 12:20:04 +0100 X-Mailer: KMail [version 1.0.17] Content-Type: text/plain; charset=iso-8859-1; format=flowed MIME-Version: 1.0 Message-ID: <00121112241502.00554@Penguin> Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi LF-ers... I just wanted an X-tal for my LF receiver. Frequency is 10836 kHz or 10564 kHz +- some kHz. I need it for the XO in first mixer for the first IF 10,7MHz. Thank you. Best regards...73 de Rich OM2TW From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16797 invoked from network); 11 Dec 2000 09:05:50 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 11 Dec 2000 09:05:50 -0000 Received: (qmail 29828 invoked from network); 11 Dec 2000 09:00:50 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 11 Dec 2000 09:00:50 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145Oik-00061W-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Dec 2000 08:54:06 +0000 Received: from cmailg7.svr.pol.co.uk ([195.92.195.177]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145Oih-00061P-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Dec 2000 08:54:04 +0000 Received: from modem-117.mendelevium.dialup.pol.co.uk ([62.136.70.117] helo=default) by cmailg7.svr.pol.co.uk with smtp (Exim 3.13 #0) id 145OiY-0007Ya-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Dec 2000 08:53:55 +0000 Message-ID: <000001c0634f$30baf960$7546883e@default> From: "MAL HAMILTON" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Transistor Date: Sun, 10 Dec 2000 10:10:46 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: -----Original Message----- From: john sexton To: rsgb_lf_group@blacksheep.org Date: 09 December 2000 19:30 Subject: Re: LF: Transistor >Hi Mal, >My data tables show the 2N6674 to be an NPN silicon transistor, with the >following params: >Max reverse voltage: 300 >I max 20 amps >P 175 watts >gain 8 - 20 at 10 amps >working range up to 15 MHz >for use in power packs, relay drivers, coverters etc. >Same pin-outs as 2N3055 > >John, G4CNN > Hello John and thanks for the info about the transistor. Much appreciated. I did hear someone working you on 136 when I was in GI but I could not hear you at that time. Next time I will also be on 73 khz. 73 de Mal/g3kev > > > > >_______________________________________________________ >Send a cool gift with your E-Card > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10705 invoked from network); 11 Dec 2000 08:57:58 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 11 Dec 2000 08:57:58 -0000 Received: (qmail 12996 invoked from network); 11 Dec 2000 09:00:45 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 11 Dec 2000 09:00:45 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145Oil-00061d-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Dec 2000 08:54:07 +0000 Received: from cmailg7.svr.pol.co.uk ([195.92.195.177]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145Oij-00061Q-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Dec 2000 08:54:05 +0000 Received: from modem-117.mendelevium.dialup.pol.co.uk ([62.136.70.117] helo=default) by cmailg7.svr.pol.co.uk with smtp (Exim 3.13 #0) id 145Oia-0007Ya-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Dec 2000 08:53:57 +0000 Message-ID: <000101c0634f$31e91920$7546883e@default> From: "MAL HAMILTON" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Re: Transistor Date: Sun, 10 Dec 2000 10:23:49 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: -----Original Message----- From: Dave To: rsgb_lf_group@blacksheep.org Date: 09 December 2000 18:26 Subject: LF: Re: Transistor >Towers transistor selector has it as: > >NPN, Si, TO3, 300V Vce, 15A max, 175W dis, Hfe of 8 at 10A, Ft of 15MHz. >Made by RCA originally. >Sounds a useful device. > >FETs are better though! > >73. Dave G3YXM. Hello Dave. Thanks for the transistor info. Much appreciated. Had a couple of replies. Thought they would be useful for something. They are already mounted on a heat sink. Maybe useful for a linear pa for psk or ssb on LF !!!!!!!!!!!!! Hope you and all the gang have fully recovered from the GU trip. Did you every think of venturing a bit further now that you are old seasoned explorers. Like TF, OX, OY, JX We could all sponser your trip and the BBC might help out. 73 de Mal/G3KEV > >> Hi all >> Does anyone know what a 2N6674 transistor happens to be? >> I have 4 of these devices out of a SMPS rated at 600w. These are >Motorola. >> Your help appreciated de Mal/G3KEV >> >> >> >> > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18168 invoked from network); 11 Dec 2000 08:48:27 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 11 Dec 2000 08:48:27 -0000 Received: (qmail 18258 invoked from network); 11 Dec 2000 08:50:39 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 11 Dec 2000 08:50:39 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145OXe-0005yG-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Dec 2000 08:42:38 +0000 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145OXd-0005yB-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Dec 2000 08:42:37 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail.cc.kuleuven.ac.be (8.9.3/8.9.0) with SMTP id JAA165646 for ; Mon, 11 Dec 2000 09:42:29 +0100 Message-ID: <3.0.1.16.20001211103428.2cbffbf0@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Mon, 11 Dec 2000 10:34:28 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: Transistor In-reply-to: <000101c06209$2e392aa0$4cdc893e@default> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Mal, Got following from the databook : 2N6674 - silicon NPN - TO3 package - made by RCA max. ratings : Vcb = 450V Vce = 300V Veb = 7V Ic = 15A Pt = 175W Ft = 15MHz Cob = 500pF Hfe = >8 connections : collector on case if you look at it from the 'hole' that is closest to the pins then emitor is left and base is right. 73, Rik ON7YD At 17:52 9/12/00 -0000, you wrote: >Hi all >Does anyone know what a 2N6674 transistor happens to be? >I have 4 of these devices out of a SMPS rated at 600w. These are Motorola. >Your help appreciated de Mal/G3KEV > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16156 invoked from network); 11 Dec 2000 08:13:40 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 11 Dec 2000 08:13:40 -0000 Received: (qmail 23091 invoked from network); 11 Dec 2000 08:15:48 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 11 Dec 2000 08:15:48 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145O18-0005rJ-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Dec 2000 08:09:02 +0000 Received: from mail.sci.fi ([195.197.53.226] helo=vasta.saunalahti.fi) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145O16-0005rE-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Dec 2000 08:09:00 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from default (MCCCXVI.rdyn.saunalahti.fi [195.197.137.116]) by vasta.saunalahti.fi (8.10.1/8.10.1) with SMTP id eBB88uW24471 for ; Mon, 11 Dec 2000 10:08:56 +0200 (EET) Message-ID: <3.0.6.32.20001211100926.008fd8b0@pop.saunalahti.fi> X-Sender: vaiski1@pop.saunalahti.fi (Unverified) X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.6 (32) Date: Mon, 11 Dec 2000 10:09:26 +0200 To: rsgb_lf_group@blacksheep.org From: =?iso-8859-1?Q?V=E4in=F6_Lehtoranta?= Subject: LF: Fs Measurements by OH2LX, 11-Dec-2000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Fs in dB(uV/m) by OH2LX, abt 2040z (99=Nil): >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> kHz;27nov;28nov;29nov;30nov;01dec;02dec;03dec;04dec;05dec;06dec;07dec;09dec; 09dec;10dec 057.7;99;99;99;99;99;99;99;99;99;99;99;99;99;99 060.0;50;50;50;47;49;49;46;50;47;50;46;50;51;49 068.0;42;38;43;40;42;41;37;44;52;52;48;54;53;51 068.9;99;99;99;99;99;99;99;99;99;99;99;99;99;99 073.2;43;43;43;40;40;42;39;41;42;44;42;99;99;40 075.0;39;38;41;38;42;38;37;37;40;40;38;37;40;40 077.5;53;54;52;53;54;47;49;49;52;48;52;53;55;56 128.9;43;42;35;40;46;26;41;38;42;37;44;42;44;46 138.8;47;42;48;32;40;29;48;45;45;36;40;43;48;50 135.8;99;99;99;99;22;19;17;19;16;14;22;15;17;16 137.0;99;99;99;11;03;01;05;99;99;99;99;99;07;03 016.0;48;49;42;46;48;46;48;47;48;45;44;47;49;48 018.3;54;54;53;53;54;55;54;53;54;99;53;53;54;52 023.4;60;62;55;59;58;59;61;64;62;63;61;60;62;60! 024.0;99;46;48;47;45;46;48;49;45;40;48;49;50:49 ;;Day;27;28;29;30;01;02;03;04;05;06;07;08;09;10 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Day;Time;Call;Fs 30nov;2045;OH1TN;17 01dec;2220;SM6PXJ;14 01dec;2221;SM6PXJ;11 06dec;2128;SM6PXJ;13 06dec;2131;SM6PXJ;12 06dec;2139;OH1BS;13 06dec;2131;OH1BS;10 07dec;2208;OH1TN;14 ------------------------------------------------------ (R&S ESH2/---- 10m coax----/1:10/-----15m wire-----): Noise level (136.2-136.9) w antenna, in 200Hz IF Bw, due to local(?) noise mostly high, around 0 dB(uV/m). ------------------------------------------------------ End of message of 11-Dec-2000, 0810 UTC, from OH2LX ------------------------------------------------------ |---------------------------------------------------------| | V.K.Lehtoranta, OH2LX ¤ 60N33.6 024E58.7 KP20LN74 | | P.O.Box 50 ¤ Telephone: +358-9-4173965 | | FIN-05401, Jokela ¤ Telefax: +358-9-4173961 | | Finland ¤ email: vaiski@dlc.fi | |---------------------------------------------------------| From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20361 invoked from network); 11 Dec 2000 04:39:19 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 11 Dec 2000 04:39:19 -0000 Received: (qmail 16537 invoked from network); 11 Dec 2000 04:41:30 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 11 Dec 2000 04:41:30 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145Kb1-00057d-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Dec 2000 04:29:51 +0000 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145Kay-00057T-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Dec 2000 04:29:48 +0000 Received: from oemcomputer (man-164.dialup.zetnet.co.uk [194.247.40.208]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id EAA08403 for ; Mon, 11 Dec 2000 04:29:41 GMT X-Authentication-Warning: irwell.zetnet.co.uk: Host man-164.dialup.zetnet.co.uk [194.247.40.208] claimed to be oemcomputer Message-ID: <000001c0632b$643df720$d028f7c2@oemcomputer> From: "John Rabson" To: rsgb_lf_group@blacksheep.org References: <002b01c05ed6$55e72d80$18273ccc@paulc> Subject: LF: Re: Pot cores available Date: Sun, 10 Dec 2000 11:15:45 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Paul, > Please pardon me for intruding here with an offer to sell but it seemed to > me that these items may be useful to some on here. > I am sorry if I have violated the rules of forum here and wish that someone > would inform me so that I can make sure it does not > happen again. I feel that your posting to this reflector is a perfectly proper thing to do. We are all learning about LF, and knowing where to find useful parts is important. 73 de John Rabson G3PAI From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7679 invoked from network); 11 Dec 2000 04:37:17 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 11 Dec 2000 04:37:17 -0000 Received: (qmail 15450 invoked from network); 11 Dec 2000 04:40:07 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 11 Dec 2000 04:40:07 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145Kb2-00057f-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Dec 2000 04:29:52 +0000 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145Kb0-00057Y-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Dec 2000 04:29:50 +0000 Received: from oemcomputer (man-164.dialup.zetnet.co.uk [194.247.40.208]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id EAA08416 for ; Mon, 11 Dec 2000 04:29:43 GMT X-Authentication-Warning: irwell.zetnet.co.uk: Host man-164.dialup.zetnet.co.uk [194.247.40.208] claimed to be oemcomputer Message-ID: <000101c0632b$659549c0$d028f7c2@oemcomputer> From: "John Rabson" To: rsgb_lf_group@blacksheep.org References: <000901c06141$630f75e0$37da893e@default> Subject: LF: Re: Re: Re: 73 khz permits Date: Sun, 10 Dec 2000 11:22:42 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > You also surely must have heard of Government LEAKS > rsgb > LEAKS > GAS > LEAKS > WATER > LEAKS and Welsh Leeks Remember Sir Humphrey in 'Yes, Prime Minister': The Irregular Verb 'To Leak' I give unattributable briefings You leak He's been charged under Section 2 (?) of the Official Secrets Act From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8507 invoked from network); 10 Dec 2000 23:38:41 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 10 Dec 2000 23:38:41 -0000 Received: (qmail 6561 invoked from network); 10 Dec 2000 23:41:31 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 10 Dec 2000 23:41:31 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145Fzh-0003ze-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 23:35:01 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145Fzf-0003zZ-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 23:35:00 +0000 Received: from central.zetnet.co.uk (central.zetnet.co.uk [194.247.47.20]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id XAA18030 for ; Sun, 10 Dec 2000 23:34:53 GMT X-ZSender: g3ldo@zetnet.co.uk Message-ID: <2000121018451368199@zetnet.co.uk> Date: Sun, 10 Dec 2000 18:45:13 GMT To: rsgb_lf_group@blacksheep.org From: "Peter Dodd" X-Mailer: ZIMACS Version 1.20c 10000836 Subject: LF: Insulators Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Laurie said: > I dont know how to calculate the voltage at the end of a top loading = > wire,but I use two ribbed ceramic insulators with a peice of terelene = > rope (5mm) between.The rope has burnt through!!! Ceramic insulators should not be a problem. However my Admiralty Handbook of Wireless Telegraphy (1925) has this to say: "Loss by Leakage over Insulators ..........................It is, therefore, the duty of the wireless staff to keep these (insulators) scrupulously clean, especially after high speed steaming, heavy rain or bad weather, since under these conditions the insulators will probably be covered with a semi-conducting layer of 'stokers dirt' and dried salt". I don't know about 'high speed steaming' but the lake around my shack is now large enough for me to sign Maritime Mobile. I find that ribbed insulators are worse for collecting dirt, which gets down in between the ridges. The long PA0SE ceramic insulators are best although the tooth brush handles should be OK. I think that a method of lowering the antenna for maintenance is a necessary design feature, especially in coastal areas. -- Regards, Peter, G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22008 invoked from network); 10 Dec 2000 23:21:16 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 10 Dec 2000 23:21:16 -0000 Received: (qmail 14950 invoked from network); 10 Dec 2000 23:24:03 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 10 Dec 2000 23:24:03 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145Fhz-0003wA-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 23:16:43 +0000 Received: from gadolinium.btinternet.com ([194.73.73.111]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145Fhy-0003w5-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 23:16:42 +0000 Received: from [213.1.198.3] (helo=default) by gadolinium.btinternet.com with smtp (Exim 3.03 #83) id 145Fhs-0004KC-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 23:16:37 +0000 Message-ID: <006301c062fe$a1b23580$9b08073e@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: CFH looking good just passed 40dBu here Date: Sun, 10 Dec 2000 23:11:28 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all It looks like a possible good night tonight....CFH has just climed from the mire right up above the 40dBu line, and it is very loud in the speaker. Get the killerwatts fired up and see if John is awake. Cheers all de Alan G3NYK JO02PB Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11892 invoked from network); 10 Dec 2000 18:33:01 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 10 Dec 2000 18:33:01 -0000 Received: (qmail 22441 invoked from network); 10 Dec 2000 18:27:57 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 10 Dec 2000 18:27:57 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145B79-0002td-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 18:22:23 +0000 Received: from email.cwcom.net ([195.44.0.104] helo=cwcom.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145B78-0002tY-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 18:22:22 +0000 Received: from computer ([195.44.5.168]) by cwcom.net with Microsoft SMTPSVC(5.5.1877.537.53); Sun, 10 Dec 2000 18:20:34 +0000 Message-ID: <002101c062d8$d8b6f1e0$a8052cc3@computer> From: "Martin M5CIX" To: rsgb_lf_group@blacksheep.org References: <1834.200012091431@gemini> <3A33C181.AC1383AD@bellatlantic.net> Subject: Re: LF: CFA Antennas Date: Sun, 10 Dec 2000 18:41:40 -0000 Organization: M5CIX / G8CIX MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: The link does not seem to work. Martin M5CIX > Hello Friends, > John Belrose (Communications Research Centre, Ottawa) > presented a paper at the Millennium Conference on > Antennas and Propagation Davos Switzerland, 9-14 April 2000, entitled "The > Crossed Field Antenna - Analyzed by Simulation and Experiment" in which he > describes a numerical simulation and some experiments he conducted on 3657 > KHz. > His conclusions are essentially that "the CFA is a very inefficient > radiator" and that "the excellent operational performance claimed by the > inventors of the CFA is an enigma." > > see also http://members.home.net/propagation/cfa2.rtf > > 73 > Andre' N4ICK > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20951 invoked from network); 10 Dec 2000 18:30:14 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 10 Dec 2000 18:30:14 -0000 Received: (qmail 24674 invoked from network); 10 Dec 2000 18:32:21 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 10 Dec 2000 18:32:21 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145BBs-0002tt-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 18:27:16 +0000 Received: from imo-r12.mx.aol.com ([152.163.225.66] helo=imo-r12.mail.aol.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145BBr-0002to-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 18:27:15 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from MarkusVester@aol.com by imo-r12.mx.aol.com (mail_out_v28.34.) id l.11.cdb71c0 (3896) for ; Sun, 10 Dec 2000 13:26:29 -0500 (EST) From: MarkusVester@aol.com Message-ID: <11.cdb71c0.276524d4@aol.com> Date: Sun, 10 Dec 2000 13:26:28 EST Subject: LF: LF antenna voltage To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Windows AOL sub 68 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Laurie, on our LF antennas the voltage is almost constant along the wire, so its peak value is simply Up = 1.41 * I_eff / (2 * pi *f * C) ; e.g. with 600pF antenna capacitance and 3 amps, you will get 15.6 kV on 72 kHz, which shouldn't be a problem in dry weather. My thin 137 kHz ant is similar with 1.5 amps into 170 pF, giving 14.6 kV. One of the 1 mm perlon strings once melted when it was attatched to the wire end without any insulator. 73 de Markus From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20690 invoked from network); 10 Dec 2000 17:49:45 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 10 Dec 2000 17:49:45 -0000 Received: (qmail 20384 invoked from network); 10 Dec 2000 17:52:34 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 10 Dec 2000 17:52:35 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145AZS-0002lA-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 17:47:34 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from smtppop3pub.gte.net ([206.46.170.22] helo=smtppop3pub.verizon.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145AZQ-0002l2-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 17:47:33 +0000 Received: from smtp-out1.bellatlantic.net (smtp-out1.bellatlantic.net [199.45.39.156]) by smtppop3pub.verizon.net with ESMTP ; id LAA73135104 Sun, 10 Dec 2000 11:42:35 -0600 (CST) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from bellatlantic.net (client-151-200-117-88.bellatlantic.net [151.200.117.88]) by smtp-out1.bellatlantic.net (8.9.1/8.9.1) with ESMTP id MAA11210; Sun, 10 Dec 2000 12:46:47 -0500 (EST) Message-ID: <3A33C181.AC1383AD@bellatlantic.net> Date: Sun, 10 Dec 2000 12:46:41 -0500 From: "Andre' Kesteloot" X-Mailer: Mozilla 4.7 [en]C-CCK-MCD NSCPCD47 (WinNT; I) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Cc: john.belrose@crc.ca Subject: Re: LF: CFA Antennas References: <1834.200012091431@gemini> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: James Moritz wrote: > Dear Martin and LF Group, [...] > Unfortunately, the CFA seems to have got surrounded by a lot of > "pseudoscientific" hype, so it is difficult to tell serious information > about it from the junk. > > Cheers, Jim Moritz > 73 de M0BMU Hello Friends, John Belrose (Communications Research Centre, Ottawa) presented a paper at the Millennium Conference on Antennas and Propagation Davos Switzerland, 9-14 April 2000, entitled "The Crossed Field Antenna - Analyzed by Simulation and Experiment" in which he describes a numerical simulation and some experiments he conducted on 3657 KHz. His conclusions are essentially that "the CFA is a very inefficient radiator" and that "the excellent operational performance claimed by the inventors of the CFA is an enigma." see also http://members.home.net/propagation/cfa2.rtf 73 Andre' N4ICK From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18565 invoked from network); 10 Dec 2000 17:47:49 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 10 Dec 2000 17:47:49 -0000 Received: (qmail 18960 invoked from network); 10 Dec 2000 17:50:38 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 10 Dec 2000 17:50:38 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145AVP-0002io-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 17:43:23 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from mail2.cpinternet.com ([204.220.140.3] helo=superior.cpinternet.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145AVN-0002ij-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 17:43:22 +0000 Received: from mlecmn.net (mlec-mcgregor5200-3-162.mlecmn.net [209.240.237.162]) by superior.cpinternet.com (8.9.2/8.9.2) with ESMTP id LAA15634; Sun, 10 Dec 2000 11:42:45 -0600 (CST) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A33B48A.643C1EA7@mlecmn.net> Date: Sun, 10 Dec 2000 10:51:22 -0600 From: "Lyle Koehler" X-Mailer: Mozilla 4.5 [en] (Win95; I) X-Accept-Language: en MIME-Version: 1.0 To: "Stewart Nelson" Cc: rsgb_lf_group@blacksheep.org, lowfer@qth.net Subject: LF: Re: [Lowfer] Detection of QRSS ("LEK" raw data) References: <200012081559.KAA6713991@indyweb.cgocable.ca> <001b01c062a5$e30f98f0$0700000a@parissn2> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In simple terms, yes, LEK chirps. Now for the long version: My PLL circuit exhibits a slight amount of frequency pulling during keying for several reasons. Probably the biggest factor is power supply instability, which is always present even though separate regulators are used for the PLL and the rest of the circuit. The box which houses my exciter includes the synthesizer, keyer (although an external keyer is presently being used for QRSS) and a complementary pair "final". The real final amplifier is at the other end of 100 feet of coax, so the final amplifier in the exciter box is just acting as a line driver. But the driver does take some current, which pulls down the supply line to the PLL circuit regulator a tiny bit, which introduces a little bit of frequency shift. I also have an LED on the front panel of the exciter that blinks on and off with the keying, and that puts an additional load of 10 mA or so on the main supply during key-down conditions. Everything adds up. There are at least two other sources of frequency shift. The switch that I use to select the internal or external keyer is on the front panel, very close to the loop filter components. Even though the 5-volt keying signal is nearly DC, it does of course have AC components during the rise and fall time, and these couple electrostatically into the loop filter. Adding a bit of shielding a couple of years ago reduced this source of frequency shift to a fairly low value. Finally, any oscillator (mechanical, electronic or laser) will tend to pull when a signal at the same frequency is fed back with a varying phase and/or amplitude. In fact, any oscillator will "lock" to an external source over a small but finite frequency range. Some small amount of signal from the keyed output of the driver stage inevitably finds its way back into the oscillator, so there will always be some phase pulling because of the RF feedback effect. In BPSK mode, the frequency shift due to power supply fluctuations is minimal because the load is essentially constant, but the RF feedback problem is worse because of the phase reversals. In addition to the frequency shift associated with keying, there is the plain old phase noise of the oscillator in my PLL circuit itself. LEK's homebrew synthesizer uses an L-C oscillator in the HF range that gets divided down to the output frequency. PLL circuits based on the R-C oscillator in the CD4046 or 74HC4046 chip are much noisier. I use the trick of listening to the harmonics to see how bad the phase noise of a particular synthesizer really is. Another piece of "test equipment" that is useful for this purpose is the vector scope in some of the PSK31 decoder programs. In trying to determine which manufacturer's 4046 chips were the least noisy in my "all-in-one" transmitter design, I used the vector scope while tuned to the 10th harmonic of the LF signal. None of them looked very good, although the National (no longer available) and Phillips CD4046 chips were the best. On 10m, they all sound awful, but fortunately there is little apparent degradation in copy on LF using QRSS or C-BPSK at MS100. I am actually surprised that LEK's chirp isn't greater than what you measured. As for fixing it, throwing away the entire existing circuit and replacing it with a DDS might do the trick. There is somewhere between zero and no chance that I'll do that this season, but it's interesting to speculate on what coherent detection could do for us. 73 Lyle, K0LR http://www.computerpro.com/~lyle From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2159 invoked from network); 10 Dec 2000 16:08:25 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 10 Dec 2000 16:08:25 -0000 Received: (qmail 4581 invoked from network); 10 Dec 2000 16:03:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 10 Dec 2000 16:03:23 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1458oa-0002Le-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 15:55:04 +0000 Received: from imo-d02.mx.aol.com ([205.188.157.34]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1458oY-0002LZ-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 15:55:03 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from MarkusVester@aol.com by imo-d02.mx.aol.com (mail_out_v28.34.) id l.2b.e590ed4 (3888) for ; Sun, 10 Dec 2000 10:54:21 -0500 (EST) From: MarkusVester@aol.com Message-ID: <2b.e590ed4.2765012d@aol.com> Date: Sun, 10 Dec 2000 10:54:21 EST Subject: LF: LF mysteries: "s" on 137.722, pips on 71.7 To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Windows AOL sub 68 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello group, for the last couple of weeks I observed a funny signal on 137.22 kHz, sending a sequence of 16 Morse "s" characters. Timing is 250 ms dotlength (4 wpm), 2 s per letter and 32 s total. The sequence repeats at irregular intervals, typically less then 10 minutes in between. Keying seems to be phase-coherent, in high-res spectrograms there appears a set of washed-out lines, spaced 2 Hz apart. Field strength is fairly constant at 7 dBuV/m, well audible above the noise. Wonder if someone else has noticed it, or can explain it. On Dec. 5th, Jim mentioned short "pips" on 71.7 kHz. I remember hearing these clearly with Jims signal last weekend, on 71.7 and also on a second QRG somewhere below the band. This weekend they seem to have disappeared. To confirm, I had a look at spectrograms recorded 3rd of March this year, and sure enough they were there, above the DECCA dashes. Different dots in the sequence indeed did have different amplitudes and slightly different freqs (20 Hz). I had always assumed they were part of the DECCA system, perhaps someone had forgotten to switch them off... Best wishes to all Markus, DF6NM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27207 invoked from network); 10 Dec 2000 15:37:19 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 10 Dec 2000 15:37:19 -0000 Received: (qmail 16887 invoked from network); 10 Dec 2000 15:39:29 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 10 Dec 2000 15:39:29 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1458UB-0002Hc-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 15:33:59 +0000 Received: from gadolinium.btinternet.com ([194.73.73.111]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1458U9-0002HX-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 15:33:58 +0000 Received: from [62.7.40.231] (helo=default) by gadolinium.btinternet.com with smtp (Exim 3.03 #83) id 1458U3-0004PV-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 15:33:52 +0000 Message-ID: <002d01c062bd$f5f21d40$bf9501d5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: Latest CFH reports...T/A condx Date: Sun, 10 Dec 2000 15:28:09 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi All, as John is back on the other end again, I thought maybe I ought to post an opinion about the conditions at present. We had a monumental series of X-ray flares on 24 and 25 of Nov. These 'wiped' the band for quite a while with lots of heavy absorption. (I think I am beginning to get a handle on these events now) I have also been reading a lot of references, and I now realise that the band conditions do not follow in line with the K index as we at first thought. It tends to start that way with a slight lag of maybe 24hrs, but the injected particles from CMEs or Coronal Hole events seem to hang around for a lot longer than the K index shows a disturbed geomagnetic field. (The K index is a magnetometer measurement of the the geomagnetic field disturbance, whilst the radio conditions are dependent on the injected particles from the event and their decay rate) We only started to come out of the absorption mid last week, as the path went into 'violent-fade routine'. Very deep dips, but on Wed night the highest peak I have seen in the logging project so far, and probably lasting for almost an hour. Thursday CFH was off air, and Friday was not spectacular here, though the plot did reach about 45dBu between 0100z and 0200z. Saturday night produced some sustained high levels, with 40dBu between 2330 and 0100z. The levels were well above 30dBu for most of the night, probably averaging 35dBu, with several peaks to 39dBu. This is the right kind of territory for a successful trip across to John from out previous experience. The state of the path will return slowly to 'normal', which is distinguished by the lack of any deep or 'rapid' (30min cycle) fading, unless we are hit by any further particle streams. the average level for these stable periods is 32-34dBu just about possible for a station with a good take-off and the full 1W ERP. Just a warning....the fading times shown on my graphs are a function of my geographical position. They will differ for anyone further away that 25kms from me. Also the coincidences may not be the same. I may not see a full 6dB enhancement that you see, and you may not see the same picture as I do. So it is worth plugging away during these conditions, monitor 137.00 if you can during your breaks, and note CFH strength. Dont be disheartened if it is down, it can climb 20dB in a little as 10 minutes under these unstable conditions. So far the most favourable conditions have seemed to occur either 24hrs after a big X-ray flare (just before the accompanying CME shock arrives) or much later as the after-effects of the disturbance die away 4 to 10 days after the CME impact. There are so many variables that each event is different in detail, although I am beginning to see a pattern. The above is my opinion, and I could just be wrong! Rik ON7YD is using up his excess holiday entitlement running up to Christmas so there may be some slight delays in posting the CFH plots on his site. I can forward a GIF file (about 8 to 10Kbytes) as an attachment to anyone who wants a to look at them urgently. CFH has been transmitting just a sub-carrier on the HF sideband (about 137.040) for the last 3 days with no sign of 'data' or modulation. It is probably going through another experimental phase so may disappear at short notice (dont rip your RX apart if you dont hear it!!) The advantage is probably lower levels of sideband noise for John. SXV has moved down to the bottom 100Hz of the band so you will probably need to negotiate a different set of frequencies to those used earlier in the season. Good Luck to you all Cheers de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28112 invoked from network); 10 Dec 2000 14:34:25 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 10 Dec 2000 14:34:25 -0000 Received: (qmail 1863 invoked from network); 10 Dec 2000 14:36:32 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 10 Dec 2000 14:36:32 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1457UD-00022v-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 14:29:57 +0000 Received: from [194.73.73.138] (helo=ruthenium) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1457UC-00022q-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 14:29:56 +0000 Received: from [213.1.149.191] (helo=default) by ruthenium with smtp (Exim 3.03 #83) id 1457U6-0007LH-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 14:29:50 +0000 Message-ID: <000301c062b5$03eadc60$bf9501d5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: 13.6MHz crystals Date: Sun, 10 Dec 2000 14:23:37 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all, seeing Claudio's posting, and assuming he is dividing down a 13.6 MHz crystal for his TX exciter, I did a bit of digging in my crystal stock. If anyone is interested I have spare :- 13.66041 ...3 off 13.76875 ...1 off both are HC/25U (plug in) First come, first served....include you full postal address. Cheers de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5919 invoked from network); 10 Dec 2000 14:28:42 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 10 Dec 2000 14:28:42 -0000 Received: (qmail 6952 invoked from network); 10 Dec 2000 14:31:32 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 10 Dec 2000 14:31:32 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1457Q8-00020P-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 14:25:44 +0000 Received: from [206.100.10.38] (helo=cobalt4.source.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1457Q6-00020K-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 14:25:42 +0000 Received: from parissn2 (AMontsouris-101-1-4-91.abo.wanadoo.fr [193.253.216.91]) by cobalt4.source.net (8.9.3/8.9.3) with SMTP id GAA18897 for ; Sun, 10 Dec 2000 06:25:33 -0800 Message-ID: <008401c062b5$322b8750$0700000a@parissn2> From: "Stewart Nelson" To: rsgb_lf_group@blacksheep.org References: <000101c06290$17c25bc0$0ad8893e@default> Subject: LF: Re: amplifier design Date: Sun, 10 Dec 2000 15:26:31 +0100 Organization: SC Group MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2919.6700 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Mal and all, While it would be great if we all had linear amplifiers, I believe that most modes of interest can be accommodated with a switching amp. Of course, CW, RTTY, and all forms of FM and FSK are fine. For PSK, you could simply feed the signal into your switching amp. If properly designed, it won't be damaged when the drive amplitude decays to zero and then comes up in the opposite phase. This will, however, generate some spurious signals. If they are unacceptable, you can generate a constant envelope signal that is PSK compatible. Suppose you want to send PSK at MS100. To produce a phase inversion, you shift frequency up (or down) by 50 Hz for 10 milliseconds. You then return to the original frequency for the remaining 90 ms. This signal can be received with normal PSK Rx gear, and will appear to be less than 1 dB weaker than true PSK (for the same PEP). But, since you can now drive the amp into hard saturation, you should come out ahead. Steve Olney's FDK is a very promising mode; it appears to be several dB better than QRSS; check out http://www.qsl.net/vk2zto/ExpModes/fdk.htm . But I believe that few have tried it because it needs a linear amp. When you send FDK, the level of each tone must be 6 dB below saturation. Instead, you could use a variant where the two tones are sent sequentially, rather than simultaneously. This costs a little in performance, because some equipment drift and change in the propagation path occurs during that time interval. But, for a given amp, you are launching twice as much energy into the air, which should more than make up the difference. And, a switching amp is now no problem. I am sure that new modes which are even more robust will be developed. But I believe that a constraint of constant envelope is not onerous, and will be the choice of most, if not all, designers. Just my opinion. 73, Stewart KK7KA ----- Original Message ----- From: "MAL HAMILTON" To: "rsgb" Sent: Sunday, December 10, 2000 10:59 AM Subject: LF: amplifier design > Hello All > > The method of using an HF frequency, dividing down then using high power > fets in class D or E then a LPF is not totally satisfactory and only permits > cw mode. > Keying this type of tx is also a problem as described in recent discussions > on the reflector plus the problems suppressing the odd harmonics 3/5/7 th > etc because of the square waves inherent in the design. Some of these > problems are being investigated and rectified but it still leaves a non > linear output and suitable only for cw or rtty. > This approach is used by most and was a quick fix to get most of us going > on 73 and 136 khz but maybe the time has come for a more traditional > approach like a linear transvertor used in conjunction with an HF > transceiver and a high power linear amplifier with appropriate bias > switching for class C for more efficiency on cw. > This would enable us to use any mode generated by the hf transceiver plus > any other mode generated by a computer ie psk 31 and other psk variations. > It also solves all the keying problems. > The disatvantage is of course that with a linear approach you only get 50% > efficiency compared with 90% with the switched mode system. > I am currently thinking of progressing along these lines and building > something suitable when time permits. > The recent discussion on this media about SUPER amplifiers is very > interesting and am awaiting the big thump from one of these on 73/136 soon. > de G3KEV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11600 invoked from network); 10 Dec 2000 13:42:26 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 10 Dec 2000 13:42:26 -0000 Received: (qmail 21119 invoked from network); 10 Dec 2000 13:44:37 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 10 Dec 2000 13:44:37 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1456gf-0001pV-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 13:38:45 +0000 Received: from cmailg7.svr.pol.co.uk ([195.92.195.177]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1456gd-0001pQ-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 13:38:44 +0000 Received: from modem-64.azaghal.dialup.pol.co.uk ([62.136.131.192] helo=lvm) by cmailg7.svr.pol.co.uk with smtp (Exim 3.13 #0) id 1456gW-0003yU-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 13:38:37 +0000 Message-ID: <000701c062ae$f389cda0$c083883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. 72Khz etc, Date: Sun, 10 Dec 2000 13:41:17 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Marcus,
I dont know how to calculate the voltage at the end of a top loading wire,but I use two ribbed ceramic insulators with a peice of terelene rope (5mm) between.The rope has burnt through!!! Guess our authorities knew a thing or two when they allowed us 1W ERP. bet they thought they will never get there,mebbe they were right. Hi. 73s Laurie..
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19086 invoked from network); 10 Dec 2000 13:02:25 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 10 Dec 2000 13:02:25 -0000 Received: (qmail 13454 invoked from network); 10 Dec 2000 13:05:15 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 10 Dec 2000 13:05:15 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 145622-0001et-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 12:56:46 +0000 Received: from imo-r11.mx.aol.com ([152.163.225.65] helo=imo-r11.mail.aol.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 145620-0001eo-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 12:56:45 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from MarkusVester@aol.com by imo-r11.mx.aol.com (mail_out_v28.34.) id l.a2.d48e589 (1814) for ; Sun, 10 Dec 2000 07:56:03 -0500 (EST) From: MarkusVester@aol.com Message-ID: Date: Sun, 10 Dec 2000 07:56:02 EST Subject: LF: Transatlantic To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Windows AOL sub 68 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi John and all, as Alan has observed before, transatlantic condx appear to be quite good lately. Last night's spectrogram showed CFH on 137.742 peaking 26 dBuV/m several times, and rather consistently above 15 dBuV/m for most of the time until 7:30. Yes, SVX has moved down again. I see its RTTY as a bright strip from 135.70 to 135.80, the strongest signal on the band at dark (approx. 40dBuV/m). This will render the lower band edge useless for the EU-NA-direction as well. We could shift our little "transatlantic qrss band plan" up by 200 Hz. Alternatively, 137.79 might be best both ways, at least with CFH in the current idle mode. Of course I'd love to be in business myself, but I'm restricted to rare occasions of zero wind: To radiate any reasonable signal, I have to fly the balloon antenna. What are the chances for a 73 / 137 kHz transatlantic crossband QSO? 73s de Markus, DF6NM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24112 invoked from network); 10 Dec 2000 12:49:32 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 10 Dec 2000 12:49:32 -0000 Received: (qmail 2761 invoked from network); 10 Dec 2000 12:51:43 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 10 Dec 2000 12:51:43 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1455rt-0001dj-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 12:46:17 +0000 Received: from mail2.svr.pol.co.uk ([195.92.193.210]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1455rs-0001dd-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 12:46:16 +0000 Received: from modem-239.emeldir.dialup.pol.co.uk ([62.136.193.239] helo=lvm) by mail2.svr.pol.co.uk with smtp (Exim 3.13 #0) id 1455qs-0004Y2-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 12:45:15 +0000 Message-ID: <000701c062a7$9eebfc20$efc1883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. 72KHz etc Date: Sun, 10 Dec 2000 12:48:48 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Hi Marcus and all.
Found problem,one of the Ant. wires has fallen down dont know wether it burnt through with higher voltage on 72Khz or just high winds.Cant do much about it at present since the WX is foul, gale force wind and driving rain Hi. So QRT now for a bit ,but many thanks for reports and I will be back!!!
Looked for Claudio but nothing seen sorry. 73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13057 invoked from network); 10 Dec 2000 12:47:07 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 10 Dec 2000 12:47:07 -0000 Received: (qmail 5447 invoked from network); 10 Dec 2000 12:42:04 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 10 Dec 2000 12:42:04 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1455iD-0001aW-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 12:36:17 +0000 Received: from [206.100.10.38] (helo=cobalt4.source.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1455iB-0001aR-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 12:36:15 +0000 Received: from parissn2 (AMontsouris-101-1-4-91.abo.wanadoo.fr [193.253.216.91]) by cobalt4.source.net (8.9.3/8.9.3) with SMTP id EAA17066; Sun, 10 Dec 2000 04:35:58 -0800 Message-ID: <001b01c062a5$e30f98f0$0700000a@parissn2> From: "Stewart Nelson" To: rsgb_lf_group@blacksheep.org, lowfer@qth.net References: <200012081559.KAA6713991@indyweb.cgocable.ca> Subject: LF: Detection of QRSS ("LEK" raw data) Date: Sun, 10 Dec 2000 13:36:56 +0100 Organization: SC Group MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2919.6700 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Bill, Lyle, and all, I have been looking at this signal to see how it might be received if it were 20 dB weaker (please don't laugh). IMO, coherent detection would be a big step toward that goal, not only because it gains an immediate 3 dB improvement in S/N, but also because it would permit combining multiple repetitions of the message in an intelligent way. Unfortunately, all my attempts to find coherency have failed, so I tried to examine the signal to see what's wrong. There are some spectra at http://www.scgroup.com/ham/lekspec.gif . These are measured across the entire 81 second record, using a Hamming window and no averaging. The X axis is in Hz; the Y in arbitrary linear voltage units. The 6 dB bandwidth is about 0.02 Hz. The dark blue curve is the received signal. This is a far cry from the spectrum that Steve Olney posted for the same signal! Neither is "wrong"; the measurement conditions were just very different. I was disturbed by the apparent strong sidebands at 799.91 and 800.03. They clearly weren't noise. I didn't think that they could be caused by the modulation, but, just to make sure, I generated a local (noise free) "LEK" and adjusted it to match the carrier amplitude and frequency of the received signal. That's the purple "simulated" curve. There's almost nothing at 800.03. Then I guessed that maybe Murphy put a birdie just 0.05 Hz from our carrier. Since I knew that "LEK" was being sent, I zeroed out all the samples from when the key was down, leaving what should be just noise. That's the yellow "key-up" curve. Guess what - looks just like noise, no birdies. Then I figured that a cleaner spectrum could be had by keeping only the "key-down" samples; that's the cyan curve. Ouch! The lower sideband is bigger than the carrier. There's got to be some FM on this signal. Question is: Tx, Rx, or the path? The answer came when I demodulated the signal. See curve at http://www.scgroup.com/ham/lekmsg.gif . The dark blue curve is amplitude in arbitrary voltage units; purple is phase in degrees. The X axis is in dot widths. I used a moving average filter one dot time wide. Although this gives a distorted view (a series of noise-free dots would appear as a triangle wave), you can simply look at the end of each element time to see what a matched filter would output. I fudged the X-axis so that the vertical gridlines are the strobe times. You can see that the data looks pretty good; the smallest "1" is about 250 and the largest "0" is about 190. This is error-free copy with some margin to spare. Now have a look at the phase. It's quite stable during all 3 dashes, but jumps whenever the key goes up and then back down. So I suspect that Lyle's carrier frequency falls about 0.1 Hz when the key goes up, so the phase is different on the next key down. (Maybe it rises - I haven't kept track of all my sines and cosines, and don't know whether Bill used USB or LSB reception.) Lyle, could you please verify if this 0.1 Hz shift really occurs? If you don't have equipment to measure it directly, just couple the oscillator (where it's a digital signal) to an HF receiver, and tune in an odd harmonic on ten meters. The 0.1 Hz should be multiplied to about 15 Hz. This should make the beat note shift from say, 400 Hz to 415, easy to hear or measure. In a weird way, the above behavior might be a "feature" rather than a bug, because it adds a powerful error correction capability not normally found in Morse code. For example, suppose you are not sure whether you received "U" or "ET", because the second dot is weak. With a suitably unstable Tx, the phase of the dash (and of the remainder of the message) would differ depending on whether that second dot had actually been sent. This could be used by the receiver to reconstruct questionable bits. Comments and opinions welcome. Thanks and 73, Stewart KK7KA ----- Original Message ----- From: "Bill de Carle" To: ; Sent: Friday, December 08, 2000 4:58 PM Subject: LF: QRSS - "LEK" raw data available > I made another pass at LEK's QRSS-CW signal last night and managed to > get some excellent data for analysis. > > I set the machine to record from 5:15 am thru 7:00 am local (EST) time. > After I crunched the raw data, LEK's CW ident was clearly audible in > there for most of that time. Conditions seemed to be very good last > night, weather was clear and crisp (overnight low here was minus 28C, > about 18 degrees below zero F, and that would have occurred pretty much > right while I was recording). > > The raw data file is a little over 100 Mb, so I extracted a representative > sample which crunches down to about the same signal quality I posted last > time. > > The raw data was sampled at 8200 samples per second, 16-bit signed binary. > There is a file called SLIVER02.AUD which has 665640 samples of this data, > about 81 seconds of audio. If you CRUNCH it you can recover one complete > "LEK " ident sequence that sounds fine. > > If you're interested you can download the file (about 1 Mb) from: > > http://cafe.rapidus.net/bill1/sliver02.zip > > Bill VE2IQ > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4946 invoked from network); 10 Dec 2000 11:59:26 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 10 Dec 2000 11:59:26 -0000 Received: (qmail 18008 invoked from network); 10 Dec 2000 11:54:27 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 10 Dec 2000 11:54:27 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1454wJ-0001OT-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 11:46:47 +0000 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1454wI-0001OO-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 11:46:46 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.200.44] (helo=gemini) by hestia.herts.ac.uk with esmtp (Exim 3.16 #4) id 1454tk-0005AE-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 11:44:08 +0000 Message-ID: <20751.200012101146@gemini> From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Sun, 10 Dec 2000 11:49:48 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: G3AQC on 73kHz/Transatlantic X-Mailer: Pegasus Mail for Win32 (v3.11) Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF Group, Heard 589 QRSS signals from G3AQC on about 71.7kHz last night and this morning - Laurie is now one of the best signals on the band. I tried calling you on 73k, Laurie, but think you must have been listening on 136k. Sorry to hear about VE1ZJ's unfavourable election outcome, but glad you are back on the air, John. I'm not sure about your RTTY signal; SXV's signal does not normally extend as low as 135.71, so it could be someone else - I haven't checked lately. I received your E-mail only this morning, so was not transmitting last night, but would certainly like to schedule some more tests. What times and frequencies would be most suitable? My signal should be about 6dB up on it's previous level, so I'm hopeful of success. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18945 invoked from network); 10 Dec 2000 11:39:29 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 10 Dec 2000 11:39:29 -0000 Received: (qmail 10215 invoked from network); 10 Dec 2000 11:34:27 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 10 Dec 2000 11:34:27 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1454dT-0001HS-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 11:27:19 +0000 Received: from mail1.svr.pol.co.uk ([195.92.193.18]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1454dR-0001HN-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 11:27:17 +0000 Received: from modem-118.argonath.dialup.pol.co.uk ([62.136.124.118] helo=lvm) by mail1.svr.pol.co.uk with smtp (Exim 3.13 #0) id 1454dI-00031Q-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 11:27:08 +0000 Message-ID: <001001c0629c$95a654e0$767c883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. T/A Date: Sun, 10 Dec 2000 11:29:49 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
GM John,
I missed your mail last night.
 Sorry about the elections.
I should like to try for contact 
please advise when you are free.No doubt others would like to try, make it worth while. Tonight is doubtfull but any other time.73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7629 invoked from network); 10 Dec 2000 10:09:06 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 10 Dec 2000 10:09:06 -0000 Received: (qmail 26433 invoked from network); 10 Dec 2000 10:11:17 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 10 Dec 2000 10:11:17 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1453Mq-0000yr-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 10:06:04 +0000 Received: from mail4.svr.pol.co.uk ([195.92.193.211]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1453Mp-0000yl-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 10:06:03 +0000 Received: from modem-10.white-faced-ibis.dialup.pol.co.uk ([62.137.216.10] helo=default) by mail4.svr.pol.co.uk with smtp (Exim 3.13 #0) id 1453MQ-0005wZ-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 10:05:39 +0000 Message-ID: <000101c06290$17c25bc0$0ad8893e@default> From: "MAL HAMILTON" To: "rsgb" Subject: LF: amplifier design Date: Sun, 10 Dec 2000 09:59:54 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello All The method of using an HF frequency, dividing down then using high power fets in class D or E then a LPF is not totally satisfactory and only permits cw mode. Keying this type of tx is also a problem as described in recent discussions on the reflector plus the problems suppressing the odd harmonics 3/5/7 th etc because of the square waves inherent in the design. Some of these problems are being investigated and rectified but it still leaves a non linear output and suitable only for cw or rtty. This approach is used by most and was a quick fix to get most of us going on 73 and 136 khz but maybe the time has come for a more traditional approach like a linear transvertor used in conjunction with an HF transceiver and a high power linear amplifier with appropriate bias switching for class C for more efficiency on cw. This would enable us to use any mode generated by the hf transceiver plus any other mode generated by a computer ie psk 31 and other psk variations. It also solves all the keying problems. The disatvantage is of course that with a linear approach you only get 50% efficiency compared with 90% with the switched mode system. I am currently thinking of progressing along these lines and building something suitable when time permits. The recent discussion on this media about SUPER amplifiers is very interesting and am awaiting the big thump from one of these on 73/136 soon. de G3KEV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7283 invoked from network); 10 Dec 2000 10:08:42 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 10 Dec 2000 10:08:42 -0000 Received: (qmail 26135 invoked from network); 10 Dec 2000 10:10:53 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 10 Dec 2000 10:10:53 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1453Ld-0000yj-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 10:04:49 +0000 Received: from bucky-rwcmex.excite.com ([198.3.99.218] helo=bucky.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1453Lb-0000yY-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 10:04:48 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from magic.excite.com ([199.172.148.161]) by bucky.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001210100411.GDIQ14843.bucky.excite.com@magic.excite.com> for ; Sun, 10 Dec 2000 02:04:11 -0800 Message-ID: <2515027.976442651630.JavaMail.imail@magic.excite.com> Date: Sun, 10 Dec 2000 02:04:06 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: lf testing MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 213.104.159.3 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Yes John, that is indeed the Greek station, SXA/SXV Marathon Navy RTTY, on 135.71/80, 75 baud, 95Hz shift. 73 John, G4CNN _______________________________________________________ Send a cool gift with your E-Card From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29310 invoked from network); 10 Dec 2000 09:58:38 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 10 Dec 2000 09:58:38 -0000 Received: (qmail 17375 invoked from network); 10 Dec 2000 10:00:49 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 10 Dec 2000 10:00:49 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1453Bf-0000u0-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 09:54:31 +0000 Received: from imo-r01.mx.aol.com ([152.163.225.1]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1453Be-0000tv-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 09:54:30 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from MarkusVester@aol.com by imo-r01.mx.aol.com (mail_out_v28.34.) id l.3a.df48582 (4422) for ; Sun, 10 Dec 2000 04:53:48 -0500 (EST) From: MarkusVester@aol.com Message-ID: <3a.df48582.2764acac@aol.com> Date: Sun, 10 Dec 2000 04:53:48 EST Subject: LF: 71.67 KHz To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Windows AOL sub 68 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear Laurie, > Thanks for the report-I didnt read my mail last night (too tired,went to bed hi!) > yes I was TEST ing on 71.68KHz..I would like a QSO with you,are you > available today? if so suggest a time and your frequency 73s Laurie.. We could still try this morning. I'll listen for you around 71.67 (+-80Hz) on the half hours (10:30, 11:30), and again tonight (eg. 17:30, 18:30, 19:30). The 71666...71676 strip is clear from LORAN here, pse try to avoid the line pair on 71679 and 682. I'd preferably transmit around 137.720 in dfcw. cu de Markus From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27188 invoked from network); 10 Dec 2000 08:37:12 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 10 Dec 2000 08:37:12 -0000 Received: (qmail 29492 invoked from network); 10 Dec 2000 08:39:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 10 Dec 2000 08:39:23 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1451uf-0000df-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 08:32:53 +0000 Received: from cmailg5.svr.pol.co.uk ([195.92.195.175]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1451ue-0000da-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 08:32:52 +0000 Received: from modem-34.dimbar.dialup.pol.co.uk ([62.136.154.162] helo=lvm) by cmailg5.svr.pol.co.uk with smtp (Exim 3.13 #0) id 1451uW-0002C0-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 08:32:45 +0000 Message-ID: <000701c06284$38debb20$a29a883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. 71KHz Date: Sun, 10 Dec 2000 08:35:25 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Hi Marcus
Thanks for the report-I didnt read my mail last night (too tired,went to bed hi!)
yes I was TEST ing on 71.68KHz..I would like a QSO with you,are you available today? if so suggest a time and your frequency 73s Laurie..
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9469 invoked from network); 10 Dec 2000 07:26:05 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 10 Dec 2000 07:26:05 -0000 Received: (qmail 10266 invoked from network); 10 Dec 2000 07:28:13 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 10 Dec 2000 07:28:13 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1450kJ-0000OL-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Dec 2000 07:18:07 +0000 Received: from postfix2.free.fr ([212.27.32.74] ident=postfix) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1450kH-0000OG-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2000 07:18:05 +0000 Received: from MarcVidal (toulouse-1-5-5.dial.proxad.net [213.228.5.5]) by postfix2.free.fr (Postfix) with SMTP id 6CC207402B for ; Sun, 10 Dec 2000 08:17:58 +0100 (MET) Message-ID: <004601c06279$60b344a0$0505e4d5@MarcVidal> From: "f5maf" To: rsgb_lf_group@blacksheep.org References: Subject: LF: Re: 136 kHz transmission tests Date: Sun, 10 Dec 2000 08:18:20 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Yesterday morning I wainted on 136.375, but no trace from Claudio, I ll see this morning. Marc F5MAF ----- Original Message ----- From: "Claudio" To: Sent: Wednesday, December 06, 2000 12:31 AM Subject: LF: 136 kHz transmission tests > Hallo LF group, > > I'm planning to transmit some slow CW beacon from 7 to 10 december. > > My working conditions: QRG 136.375 kHz, Pout about 100W, 30 m wire antenna, > lossy coil :-( > In those day I plan to build a new coil. > > QTH locator is jn45pu 50 km north Milano. > > I'm not shure for internet connectivity from the portable QTH. > Reports are wellcome. > > 73 de Claudio > > ---------------------------------------------------------------------- > Claudio Pozzi http://www.qsl.net/ik2pii happy Linux user > E-Mail: Claudio > Date: 06-Dec-00 Time: 00:19:49 > This message was sent by XFMail > ---------------------------------------------------------------------- > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 901 invoked from network); 9 Dec 2000 22:48:26 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 9 Dec 2000 22:48:26 -0000 Received: (qmail 26802 invoked from network); 9 Dec 2000 22:43:27 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 9 Dec 2000 22:43:27 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144scX-0006oC-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 22:37:33 +0000 Received: from pop3.web.de ([212.227.116.81] helo=smtp.web.de) by post.thorcom.com with smtp (Exim 3.16 #1) id 144scV-0006o7-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 22:37:31 +0000 Received: from oexnernb by smtp.web.de with smtp (freemail 4.2.1.0 #2) id m144sc9-005D0cC; Sat, 9 Dec 2000 23:37 +0100 Message-ID: <001101c06230$c544b320$be5ca8c0@oexnernb> From: "Michael Oexner" To: rsgb_lf_group@blacksheep.org Subject: LF: European NDB Handbook / CD - 2001 edition Date: Sat, 9 Dec 2000 23:32:02 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2919.6600 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: *** THE EUROPEAN NDB HANDBOOK / 2001 EDITION *** and *** THE EUROPEAN NDB HANDBOOK CD / 2001 EDITION *** by Michael Oexner Nondirectional beacons (NDBs) are still in good use today as aids for aeronautical and maritime navigation. NDBs are lowpowered (50 W to 250 W) LW- or MW-transmitters feeding omnidirectional antennas resulting in a relatively small coverage area under daylight conditions. They transmit a callsign consisting of a few letters in slow Morse code, followed by a short silence or a continuous dash, before the callsign will be repeated. During hours of darkness NDBs can be received over much longer distances, allowing the reception of NDBs throughout Europe, Northern Africa, and even over transatlantic paths (e. g. Canada). By monitoring NDB transmissions interesting data can be collected regarding LF propagation conditions. Thus NDBs are interesting for amateur radio operators who want to be active in the 136 kHz portion of the radio spectrum. *** THE EUROPEAN NDB HANDBOOK / 2001 EDITION *** Now in its third year already, the new ENDBH 2001 will give you the most up to date NDB information available. Its over 140 spiral-bound pages in DIN A4 format contain data of more than 3600 active NDBs located throughout Europe, the Northern African countries, and the Near and Middle East. Many of the more frequently heard transatlantic NDBs have been included, as well as NDBs operating from offshore installations such as oil platforms. Moreover the handbook lists widely reported unidentified beacons and irregular call signs which result from so-called "negative keying". Many a NDB mystery may be solved with this kind of information on hand. The layout of the NDB data is well known from the previous editions: part 1 (the reference list) shows the entries sorted by alphabetical order of the call sign and lists the carrier frequency, the modulation frequency, the authority or company taking care of the NDB, name and location of the NDB, country in ITU code, geographical coordinates, distance and Great Circle bearing. Part 2 of the handbook is sorted in frequency order, and part 3 in country order. As a new feature the 2001 edition now includes a fourth part which lists NDBs that have been decommissioned. As a special benefit to the users of this handbook, the distance and Great Circle bearing are computed for the individual listener's location. *Please* don't forget to specify the geographic coordinates of your listening post when ordering (recommended format to be used: degrees/minutes/seconds). Please let me know whether you prefer the distance shown either in kilometers or in miles. To give newcomers an easy start the handbook includes a table showing those NDBs that are nearest to your location. And for those who are unfamiliar with Morse code, a reference table is included. *** THE EUROPEAN NDB HANDBOOK CD / 2001 EDITION *** This new CD contains all parts of the printed version of ENDBH 2001 in the popular PDF file format. All you will need to read the data is to install the Acrobat Reader software enclosed on the CD (in case you don't have it already). Having the NDB data available on your PC will allow you to easily search for specific entries. And if you would still like a printed version of the handbook, you can print it on your own now. The CD contains some additional "bonus tracks" which I hope you'll enjoy. This includes some NDB pictures and sounds plus software packages to produce Great Circle maps and to calculate Great Circle distances and bearings, respectively. System requirements are a standard PC with CD-ROM drive and Microsoft Windows 9x or Windows NT4.0 operating systems (it should also run on any of the newer MS Windows operating systems). *** Price *** The price for the ENDBH 2001 and for the ENDBH CD 2001, respectively, is DM 50.- / £20 / EURO 25 / US-$ 25 each. This includes postage and packaging for European destinations. US customers have the choice of surface mail delivery for US-$ 25 or airmail delivery for US-$ 35. *** How to pay *** If you prefer to use Eurocheques or IMOs you can make them payable to the account number 100156926, BLZ 54850010, Sparkasse Landau. If you want to avoid the high costs incurred by purchasing International Money Orders or Eurocheques etc. you can always send your payment in the form of Pound notes or Dollar bills. If you are using this method though do be sure to take the usual precautions of concealing them well inside your letter. US customers can send standard US-$ checks. *** Where to order *** To get your copy please send your order and advance payment to the following address: Michael Oexner, Hainfelder Str. 1, D-76835 Roschbach, Germany. If you require more information about the publication and have access to e-mail you can also contact me at the following e-mail address: michael.oexner@web.de *** Delivery time *** All handbooks and CDs will be produced individually, so a production time of 2 weeks should be expected. Surface mail delivery to the US can add another 8 to 10 days. Good NDB DX! Michael Oexner From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25621 invoked from network); 9 Dec 2000 21:15:06 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 9 Dec 2000 21:15:06 -0000 Received: (qmail 7276 invoked from network); 9 Dec 2000 21:17:14 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 9 Dec 2000 21:17:14 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144rHo-0006TJ-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 21:12:04 +0000 Received: from jubilee.ns.sympatico.ca ([142.177.1.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144rHm-0006TE-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 21:12:03 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.65.51]) by jubilee.ns.sympatico.ca (Post.Office MTA v3.5.2 release 221 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Sat, 9 Dec 2000 17:11:52 -0400 Message-ID: <3A32E673.CBD091F2@ns.sympatico.ca> Date: Sat, 09 Dec 2000 21:12:03 -0500 From: "John Currie" X-Mailer: Mozilla 4.7 [en]C-DIAL (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: lf testing Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: The election is over and as expected I lost. Have been having trouble with big 60 Hz harmonics. Last night I made things better. 128.9 was S-6 and DCF-39 was S-7 at 0330Z. I noticed rtty stn on 135 with big sig at 135.798. and sideband at 135.713 (85 Hz ) lower . Could that be the Greek Station? I can be looking tonight at 2130 or 0300 if anyone wants to try. I hope 60 Hz problems are solved 73 de John VE1ZJ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2145 invoked from network); 9 Dec 2000 20:22:04 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 9 Dec 2000 20:22:04 -0000 Received: (qmail 29440 invoked from network); 9 Dec 2000 20:24:48 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 9 Dec 2000 20:24:48 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144qRs-0006Ca-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 20:18:24 +0000 Received: from mail.rhein-zeitung.de ([195.189.135.96]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144qRr-0006CV-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 20:18:24 +0000 Received: from oemcomputer (pppin237.max-linz.rz-online.NET [212.7.165.237]) by mail.rhein-zeitung.de (8.9.3/8.9.2) with SMTP id VAA26547 for ; Sat, 9 Dec 2000 21:18:09 +0100 Message-ID: <000401c0621c$f16665c0$eda507d4@oemcomputer> From: "Dieter Wulff" To: rsgb_lf_group@blacksheep.org References: <002a01c06217$05db4580$d3db79c3@default> Subject: LF: Re: ELK639 Date: Sat, 9 Dec 2000 21:16:40 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Ko Have the original Telefunken ELK639 manual (and the receiver). This rx is a bit old fashioned, with a separate LF tuner. Need more info? Dieter , DK5PT dwulff@rz-online.de ----- Original Message ----- From: ko versteeg To: Sent: Saturday, December 09, 2000 8:20 PM Subject: LF: ELK639 > Hi all.. > Does anyone use or have info on the "Telefunken ELK639", > it covers 9-570 Khz.. > > 73 de Ko, NL9222 > > http://leden.tref.nl/~nl9222tv/default.htm > http://home.wanadoo.nl/nl9222/index.htm > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 840 invoked from network); 9 Dec 2000 19:47:34 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 9 Dec 2000 19:47:34 -0000 Received: (qmail 24597 invoked from network); 9 Dec 2000 19:49:45 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 9 Dec 2000 19:49:45 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144pu8-0005za-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 19:43:32 +0000 Received: from mta03.talk21.com ([62.172.192.172] helo=t21mta03-app.talk21.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144pu7-0005zT-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 19:43:31 +0000 Received: from dave ([213.120.29.247]) by t21mta03-app.talk21.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001209194421.JPGD1799.t21mta03-app.talk21.com@dave> for ; Sat, 9 Dec 2000 19:44:21 +0000 Message-ID: <003301c06218$16ac4660$f71d78d5@dave> From: "Dave Sergeant" To: rsgb_lf_group@blacksheep.org References: <000001c061be$e91f5880$e52f883e@default> <001101c061ce$0d51dd40$71cc2cc3@computer> Subject: LF: Re: Crossed Field Antenna Date: Sat, 9 Dec 2000 19:39:26 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: >From Dave G3YMC Martin G5CIZ wrote: >My attention has recently been drawn to the concept of the Cross Field >Anntena. Which if it works might be the solution to problems of power and >sixe. I quote the attached snipit from the antennex web site. Yes, as Jim comments, the CFA antenna has been discussed on here several times over the years. The extract you quote from the antennex site does not seem to have changed from when I first looked at it some two years ago, and I guess the number of working CFA installations has not increased much in that time either. We are still waiting to see results from the promised long wave installation on the Isle of Man, but from what I hear that project is dragging on with problems not neccessarily related to the CFA. In general the dimensions would as Jim says make it impractical for most amateurs, whatever the band, and it seems you can always do better with a more conventional antenna, whatever the frequency. You will notice there is no mention of it in the new LF source book!!! Cheers Dave sergeantd@compuserve.com dsergeant@iee.org http://ourworld.compuserve.com/homepages/sergeantd From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26701 invoked from network); 9 Dec 2000 19:43:20 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 9 Dec 2000 19:43:20 -0000 Received: (qmail 492 invoked from network); 9 Dec 2000 19:45:27 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 9 Dec 2000 19:45:27 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144pmp-0005yZ-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 19:35:59 +0000 Received: from smtp06.wxs.nl ([195.121.6.58]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144pmo-0005yS-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 19:35:58 +0000 Received: from default ([195.121.219.211]) by smtp06.wxs.nl (Netscape Messaging Server 4.05) with SMTP id G5BFQX01.VNI for ; Sat, 9 Dec 2000 20:35:21 +0100 Message-ID: <002a01c06217$05db4580$d3db79c3@default> From: "ko versteeg" To: rsgb_lf_group@blacksheep.org Subject: LF: ELK639 Date: Sat, 9 Dec 2000 20:20:28 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.1 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all.. Does anyone use or have info on the "Telefunken ELK639", it covers 9-570 Khz.. 73 de Ko, NL9222 http://leden.tref.nl/~nl9222tv/default.htm http://home.wanadoo.nl/nl9222/index.htm From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8696 invoked from network); 9 Dec 2000 19:26:17 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 9 Dec 2000 19:26:17 -0000 Received: (qmail 12238 invoked from network); 9 Dec 2000 19:29:05 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 9 Dec 2000 19:29:05 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144pVY-0005tx-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 19:18:08 +0000 Received: from bucky-rwcmex.excite.com ([198.3.99.218] helo=bucky.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144pVX-0005rj-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 19:18:08 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from magic.excite.com ([199.172.148.161]) by bucky.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001209191730.DKIZ14843.bucky.excite.com@magic.excite.com> for ; Sat, 9 Dec 2000 11:17:30 -0800 Message-ID: <18509478.976389450751.JavaMail.imail@magic.excite.com> Date: Sat, 9 Dec 2000 11:17:28 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Transistor MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 213.104.153.98 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Mal, My data tables show the 2N6674 to be an NPN silicon transistor, with the following params: Max reverse voltage: 300 I max 20 amps P 175 watts gain 8 - 20 at 10 amps working range up to 15 MHz for use in power packs, relay drivers, coverters etc. Same pin-outs as 2N3055 John, G4CNN _______________________________________________________ Send a cool gift with your E-Card From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11125 invoked from network); 9 Dec 2000 19:00:24 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 9 Dec 2000 19:00:24 -0000 Received: (qmail 20151 invoked from network); 9 Dec 2000 18:55:24 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 9 Dec 2000 18:55:24 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144p3N-0005k5-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 18:49:01 +0000 Received: from smtp-1.visp.telinco.net ([212.1.130.1]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144p3M-0005jz-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 18:49:00 +0000 Received: from [212.1.135.84] (helo=g4jnt) by smtp-1.visp.telinco.net with smtp (Exim 3.16 #1) id 144p0n-0005PV-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 18:46:22 +0000 Message-ID: <002d01c06210$b2f6ee60$548701d4@g4jnt> From: "Andrew Talbot" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Re: BPSK signal on 137.79 Date: Sat, 9 Dec 2000 18:49:01 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.1 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: About 600 Watts, and judging by the (cold) heatsink temp with a small fan could be be tempted to try increasing power to destruction - under controlled conditions of course ! This PA does not lend itself to power reduction, apart from switching transformer taps - but we could try with the original (linear) design some time. Is anyone else transmitting this mode yet ? -----Original Message----- From: john sexton >This time managed to see it on spectrogram. Low resolution is best. Looks >like a string of beads of different sizes, i.e. the carrier splits into two >about 10 Hz apart for a short duration and then comes back together. >Fascinating to watch. >What power are you using? It would be interesting to see how sync is >maintained if you step the power progressively lower. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10624 invoked from network); 9 Dec 2000 18:26:00 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 9 Dec 2000 18:26:00 -0000 Received: (qmail 562 invoked from network); 9 Dec 2000 18:20:57 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 9 Dec 2000 18:20:57 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144oVS-0005Ys-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 18:13:58 +0000 Received: from cmailg4.svr.pol.co.uk ([195.92.195.174]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144oVR-0005Yn-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 18:13:57 +0000 Received: from modem-93.beleg.dialup.pol.co.uk ([62.136.136.221] helo=lvm) by cmailg4.svr.pol.co.uk with smtp (Exim 3.13 #0) id 144oVK-0003Cw-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 18:13:51 +0000 Message-ID: <000f01c0620c$3c705be0$dd88883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re 73 NOV. Date: Sat, 9 Dec 2000 18:16:30 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Hi Alan,
Thanks for your good wishes re the 73Khz.NOV. Managed to get the old TX(not the Decca) on frequency this afternoon.About 3A into the antenna which gives me about 0.2W ERP. The Rx side is still a bit heath robinson need to build a pre amp and BP filter. but I saw both sides of Jims QSO last night with ON4ZK, good signal here Jim! Hope to make some contacts and catch up on lost time when I didnt have a NOV. Re 136, would like to try the Transatlantic trip again whilst I have the borowed Decca,we must be missing some good openings as you reported a day or two ago. 73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8925 invoked from network); 9 Dec 2000 18:21:54 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 9 Dec 2000 18:21:54 -0000 Received: (qmail 28003 invoked from network); 9 Dec 2000 18:24:06 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 9 Dec 2000 18:24:06 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144oZ7-0005bN-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 18:17:45 +0000 Received: from [212.159.14.227] (helo=warrior-outbound.servers.plus.net) by post.thorcom.com with smtp (Exim 3.16 #1) id 144oZ6-0005bF-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 18:17:44 +0000 Received: (qmail 26962 invoked from network); 9 Dec 2000 18:16:55 -0000 Received: from unknown (HELO picks) (212.159.34.169) by warrior with SMTP; 9 Dec 2000 18:16:55 -0000 Message-ID: <002101c0620d$0ee8ab40$a9229fd4@f9.net.uk> From: "Dave" To: rsgb_lf_group@blacksheep.org References: <000101c06209$2e392aa0$4cdc893e@default> Subject: LF: Re: Transistor Date: Sat, 9 Dec 2000 18:22:57 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Towers transistor selector has it as: NPN, Si, TO3, 300V Vce, 15A max, 175W dis, Hfe of 8 at 10A, Ft of 15MHz. Made by RCA originally. Sounds a useful device. FETs are better though! 73. Dave G3YXM. > Hi all > Does anyone know what a 2N6674 transistor happens to be? > I have 4 of these devices out of a SMPS rated at 600w. These are Motorola. > Your help appreciated de Mal/G3KEV > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21541 invoked from network); 9 Dec 2000 18:04:44 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 9 Dec 2000 18:04:44 -0000 Received: (qmail 18290 invoked from network); 9 Dec 2000 18:06:51 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 9 Dec 2000 18:06:51 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144oIG-0005VO-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 18:00:20 +0000 Received: from cmailg3.svr.pol.co.uk ([195.92.195.173]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144oIF-0005VI-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 18:00:19 +0000 Received: from modem-76.yellow-billed-loon.dialup.pol.co.uk ([62.137.220.76] helo=default) by cmailg3.svr.pol.co.uk with smtp (Exim 3.13 #0) id 144oI8-0000Je-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 18:00:13 +0000 Message-ID: <000101c06209$2e392aa0$4cdc893e@default> From: "MAL HAMILTON" To: "rsgb" Subject: LF: Transistor Date: Sat, 9 Dec 2000 17:52:06 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all Does anyone know what a 2N6674 transistor happens to be? I have 4 of these devices out of a SMPS rated at 600w. These are Motorola. Your help appreciated de Mal/G3KEV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4248 invoked from network); 9 Dec 2000 17:50:23 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 9 Dec 2000 17:50:23 -0000 Received: (qmail 8270 invoked from network); 9 Dec 2000 17:53:07 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 9 Dec 2000 17:53:07 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144o4C-0005Qs-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 17:45:48 +0000 Received: from laguna.tiscalinet.it ([195.130.224.86]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144o4B-0005Qn-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 17:45:47 +0000 Received: from tiscalinet.it (62.10.86.63) by laguna.tiscalinet.it; 9 Dec 2000 18:44:41 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A327013.DB66491D@tiscalinet.it> Date: Sat, 09 Dec 2000 18:46:59 +0100 From: "Claudio" X-Mailer: Mozilla 4.73 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: 136 kHz transmission tests References: <3A2F4439.6553B511@alg.demon.co.uk> <3A301459.F38C5F40@tiscalinet.it> <3A325CDF.45D9C49A@alg.demon.co.uk> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: HI Steve TNX for yous suggestions. I agee, for next time I change the Xtal. I'm working around a direct convertion receiber and a better loading coil. I hope to connect you and other LF group members soon. 73 de Claudio, IK2PII Steve Rawlings wrote: > > Hello Claudio! > > > In my usual home I have two other Xtals, one for 135.975 kHz > > and the other one for 137.525 kHz. May be that one of those is > > good for a beacon? For the next week-end I change the frequency > > according yours suggestions. > It is my understanding that, where possible, operators try to use > the following suggested bandplan: > 135.7 to 135.8: QRSS ('visual CW') > 135.7 to 136.0: TX tests & beacons > 136.0 to 137.4: Normal ('conventional') CW > 137.4 to 137.6: Data modes > 137.6 to 137.8: QRSS ('visual CW') > > This plan is working well in this part of Europe, and helps to > separate incompatible modes. > > It seems to me that you could use either 135.975 kHz or 137.525 > kHz for your tests. But, I agree with Dave when he wrote "If the > only crystal you have falls in the wrong part of the band, don't > be afraid to put out a call. I don't want to discourage anyone > from coming on!" [Dave Pick, G3YXM, 'LF' column, RadCom, January > 2000]. > > Here in the UK, we don't use beacons on 136 kHz any more. We > just plug in the key and have some QSOs :-) > > The higher level of activity here means that a beacon operating > for long periods on 136.375 from the UK could cause a lot of > QRM. But perhaps the situation is different in Italy. > > Good luck with your tests, Claudio. (Be sure to spend enough > time trying to make 2-way QSOs!) > > Regards to all, > Steve GW4ALG -- Claudio Pozzi http://www.qsl.net/ik2pii happy Linux user E-Mail: ---------------------------------------------------------------------- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22775 invoked from network); 9 Dec 2000 17:35:48 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 9 Dec 2000 17:35:48 -0000 Received: (qmail 24794 invoked from network); 9 Dec 2000 17:37:56 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 9 Dec 2000 17:37:56 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144nrQ-0005NE-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 17:32:36 +0000 Received: from smtp-1.visp.telinco.net ([212.1.130.1]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144nrP-0005N9-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 17:32:35 +0000 Received: from [212.1.156.226] (helo=g4jnt) by smtp-1.visp.telinco.net with smtp (Exim 3.16 #1) id 144noY-0000rN-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 17:29:39 +0000 Message-ID: <003c01c06205$fadb2bc0$e29c01d4@g4jnt> From: "Andrew Talbot" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Re:amplifiers Date: Sat, 9 Dec 2000 17:32:17 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.1 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: About 95% correct I reckon Jim, I think the overlap betwen turn off and on is a function of the FET itself, and turn off will always be faster that turn on even for an infinietly steep drive waveform from zero impedance. But the choke between the devices does absorb this transient (not usually done in SMPSUs for some reason) but now makes the extra diodes even more essential. At first I was unhappy with the Decca gate drive circuitry - a square wave direct to the gate seemed wrong and why does every SMPSU Dc restore the drive signal and often use an extra PNP transistor to get fast turn off ? But testing really did prove it works better so it looks as if a few SMPSU designs could be improved/simplified with direct drive. In hindsight, a negative drive voltage will do a very good job at turning the device off ! Thanks for the pointer about HF/VHF sprogs from the midpoint to tank Johan, It hadn't really occured to me but a well screened enclosure will help a lot, then a simple LPF to complete the filtering. I hadn't come across the current switching topology, might be time to look at the 'YXM design in more detail. I'm radiating abt 600W at the moment, a BPSK test message on 137790 (will turn off well before the VE beacon comes on at 2000z). Tested at 500W earlier this afternoon for just over 1 hour. After fitting a small 12V fan to the heatsink it now runs COLD. In fact the only components that do get hot to touch are the output transformer core (50 deg) and the tank coil just above ambient. Strangely the transformer gets a fair bit hotter than when testing into a dummy load at the same power - due to a slightly reactive load I guess. Andy G4JNT >From 'MBU >I think this is the main function of the "transient soak" chokes in the >Decca design - diverting the current into the fast diodes rather than >through the Mosfet diodes during the switching transient. There is >not much chance of cross conduction through the mosfets, since >the transformer coupled gate circuit inherently prevents the gate >drive from overlapping. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7438 invoked from network); 9 Dec 2000 17:23:55 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 9 Dec 2000 17:23:55 -0000 Received: (qmail 16886 invoked from network); 9 Dec 2000 17:26:43 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 9 Dec 2000 17:26:43 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144ngB-0005Jd-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 17:20:59 +0000 Received: from bucky-rwcmex.excite.com ([198.3.99.218] helo=bucky.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144ngA-0005JY-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 17:20:58 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from magic.excite.com ([199.172.148.161]) by bucky.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001209172016.CXSJ14843.bucky.excite.com@magic.excite.com> for ; Sat, 9 Dec 2000 09:20:16 -0800 Message-ID: <19560970.976382416025.JavaMail.imail@magic.excite.com> Date: Sat, 9 Dec 2000 09:20:14 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Your BPSK signal on 137.79 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 213.104.156.20 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Andy, Noticed a warbling tone on 137.79 when I returned from town around 17.00 and guessed it might be you. Coherent sync'-ed up straight away without using grab, your usual test loop of 16 chars. This time managed to see it on spectrogram. Low resolution is best. Looks like a string of beads of different sizes, i.e. the carrier splits into two about 10 Hz apart for a short duration and then comes back together. Fascinating to watch. What power are you using? It would be interesting to see how sync is maintained if you step the power progressively lower. John, G4CNN _______________________________________________________ Send a cool gift with your E-Card From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28236 invoked from network); 9 Dec 2000 16:44:27 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 9 Dec 2000 16:44:27 -0000 Received: (qmail 16281 invoked from network); 9 Dec 2000 16:47:12 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 9 Dec 2000 16:47:12 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144myf-00057E-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 16:36:01 +0000 Received: from anchor-post-31.mail.demon.net ([194.217.242.89]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144myd-000579-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 16:35:59 +0000 Received: from alg.demon.co.uk ([194.222.171.80]) by anchor-post-31.mail.demon.net with esmtp (Exim 2.12 #1) id 144myX-0004kD-0V for rsgb_lf_group@blacksheep.org; Sat, 9 Dec 2000 16:35:54 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A325CDF.45D9C49A@alg.demon.co.uk> Date: Sat, 09 Dec 2000 16:25:03 +0000 From: "Steve Rawlings" X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win98; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: 136 kHz transmission tests References: <3A2F4439.6553B511@alg.demon.co.uk> <3A301459.F38C5F40@tiscalinet.it> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Claudio! > In my usual home I have two other Xtals, one for 135.975 kHz > and the other one for 137.525 kHz. May be that one of those is > good for a beacon? For the next week-end I change the frequency > according yours suggestions. It is my understanding that, where possible, operators try to use the following suggested bandplan: 135.7 to 135.8: QRSS ('visual CW') 135.7 to 136.0: TX tests & beacons 136.0 to 137.4: Normal ('conventional') CW 137.4 to 137.6: Data modes 137.6 to 137.8: QRSS ('visual CW') This plan is working well in this part of Europe, and helps to separate incompatible modes. It seems to me that you could use either 135.975 kHz or 137.525 kHz for your tests. But, I agree with Dave when he wrote "If the only crystal you have falls in the wrong part of the band, don't be afraid to put out a call. I don't want to discourage anyone from coming on!" [Dave Pick, G3YXM, 'LF' column, RadCom, January 2000]. Here in the UK, we don't use beacons on 136 kHz any more. We just plug in the key and have some QSOs :-) The higher level of activity here means that a beacon operating for long periods on 136.375 from the UK could cause a lot of QRM. But perhaps the situation is different in Italy. Good luck with your tests, Claudio. (Be sure to spend enough time trying to make 2-way QSOs!) Regards to all, Steve GW4ALG From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23695 invoked from network); 9 Dec 2000 14:36:11 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 9 Dec 2000 14:36:11 -0000 Received: (qmail 14279 invoked from network); 9 Dec 2000 14:38:51 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 9 Dec 2000 14:38:51 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144l1w-0004g5-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 14:31:16 +0000 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144l1u-0004fv-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 14:31:14 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.200.44] (helo=gemini) by hestia.herts.ac.uk with esmtp (Exim 3.16 #4) id 144kzO-0006h7-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 14:28:38 +0000 Message-ID: <1834.200012091431@gemini> From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Sat, 9 Dec 2000 14:34:15 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: CFA Antennas X-Mailer: Pegasus Mail for Win32 (v3.11) Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear Martin and LF Group, The CFA antenna has been doing the rounds for a while - the problem is, like most "miracle" antennas, it does not seem to live up to it's claims in real life. Nobody, including the inventors, seem to be able to get reproducible results from the CFA; clearly, it does radiate some signal, but as amateurs are well aware, just about any bit of metal can be coaxed into radiating a reasonable signal some of the time. At least one Australian broadcast station found that their CFA antenna worked better tuned against ground in a conventional manner, rather than using the "crossed field" principle. The anecdote about the Egyptian broadcast station does not really stand scrutiny - a lambda/4 MF broadcast antenna should have an efficiency of 80% or more, so to get 6dB improvement, the CFA would have to radiate 4 times more power, ie. 320% efficiency, or more than 3 times as much power as is being fed into it from the transmitter. The other possibility is that the comparison antenna was extremely inefficient, for reasons unknown. A 6.5m tall CFA scaled from 1.16MHz to 136kHz would be 55m tall - basically funnel shaped, a solid metal cylinder around10 metres in diameter, with a big cone made of mesh about the same diameter as the height for top loading, driven against a solid metal ground plane. So it really should be quite efficient, whether it embodies any new operating principles or not, and could not be called "small" by amateur standards. Unfortunately, the CFA seems to have got surrounded by a lot of "pseudoscientific" hype, so it is difficult to tell serious information about it from the junk. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22719 invoked from network); 9 Dec 2000 14:35:04 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 9 Dec 2000 14:35:04 -0000 Received: (qmail 21320 invoked from network); 9 Dec 2000 14:37:52 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 9 Dec 2000 14:37:52 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144l1x-0004g7-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 14:31:17 +0000 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144l1u-0004fw-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 14:31:15 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.200.44] (helo=gemini) by hestia.herts.ac.uk with esmtp (Exim 3.16 #4) id 144kzO-0006h9-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 14:28:38 +0000 Message-ID: <1837.200012091431@gemini> From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Sat, 9 Dec 2000 12:11:11 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: 73kHz Last night/This morning X-Mailer: Pegasus Mail for Win32 (v3.11) Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF Group, Thanks to DF6NM and ON4ZK for the cross-band QRSS contacts last night; also thanks to DK5PT and G3OLB for the reception reports. I did not hear any other stations on 73kHz last night. As usual, I was using 350W, giving an antenna current around 2A. I had the antenna wound up into it's inverted V configuration with an average height of about 12m last night, however it was in it's lowered position this morning, with average height about 7.5m. The Rugby transmitter was still off air this morning, and the band was uncannily quiet - now would be a good opportunity for some activity on the band. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14211 invoked from network); 9 Dec 2000 13:19:43 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 9 Dec 2000 13:19:43 -0000 Received: (qmail 19052 invoked from network); 9 Dec 2000 13:21:49 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 9 Dec 2000 13:21:49 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144jkk-0004Lu-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 13:09:26 +0000 Received: from cmailg4.svr.pol.co.uk ([195.92.195.174]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144jkj-0004Lp-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 13:09:25 +0000 Received: from modem-30.percula-clown.dialup.pol.co.uk ([62.137.49.158] helo=lvm) by cmailg4.svr.pol.co.uk with smtp (Exim 3.13 #0) id 144jkb-0001x4-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 13:09:17 +0000 Message-ID: <000a01c061e1$b0757f00$9e31893e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Big Signal Date: Sat, 9 Dec 2000 13:07:36 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Hi All,
Very big signal here on 137.8,guess its Andys big amp! only 18db down on DCF39!  Got my NOV today so hope to be QRV on 73 Khz soon 73s Laurie..
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5039 invoked from network); 9 Dec 2000 10:59:58 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 9 Dec 2000 10:59:58 -0000 Received: (qmail 18949 invoked from network); 9 Dec 2000 11:02:07 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 9 Dec 2000 11:02:07 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144hdv-0003py-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 10:54:15 +0000 Received: from mail.rhein-zeitung.de ([195.189.135.96]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144hdu-0003ps-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 10:54:14 +0000 Received: from oemcomputer (pppin252.max-linz.rz-online.NET [212.7.165.252]) by mail.rhein-zeitung.de (8.9.3/8.9.2) with SMTP id LAA08505 for ; Sat, 9 Dec 2000 11:54:00 +0100 Message-ID: <000f01c061ce$219a6e20$fca507d4@oemcomputer> From: "Dieter Wulff" To: rsgb_lf_group@blacksheep.org Subject: LF: M0BMU on 71kc Date: Sat, 9 Dec 2000 11:52:27 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Jim and all Heard your sigs yesterday evening and this morning at 8:07utc on 71.65kc. Had to use "audio decoding", no qrss programm on my pc. Signal strength on my vertical tuned to 71kc: 10mikrovolt at @100cy bandwith.; signal to noise ratio abt 3db. possibly enough, to work normal cw X- band. 73 Dieter , DK5PT LOC: JO30OL From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18535 invoked from network); 9 Dec 2000 10:47:22 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 9 Dec 2000 10:47:22 -0000 Received: (qmail 9518 invoked from network); 9 Dec 2000 10:42:25 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 9 Dec 2000 10:42:25 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144hJ6-0003lK-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 10:32:44 +0000 Received: from email.cwcom.net ([195.44.0.153] helo=cwcom.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144hJ5-0003lF-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 10:32:43 +0000 Received: from computer ([195.44.204.113]) by cwcom.net with Microsoft SMTPSVC(5.5.1877.537.53); Sat, 9 Dec 2000 10:32:37 +0000 Message-ID: <001101c061ce$0d51dd40$71cc2cc3@computer> From: "Martin M5CIX" To: rsgb_lf_group@blacksheep.org References: <000001c061be$e91f5880$e52f883e@default> Subject: LF: Crossed Field Antenna Date: Sat, 9 Dec 2000 10:50:21 -0000 Organization: M5CIX / G8CIX MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: My attention has recently been drawn to the concept of the Cross Field Anntena. Which if it works might be the solution to problems of power and sixe. I quote the attached snipit from the antennex web site. "Let me tell you about one example, lest you think this is all for naught: A CFA only 21 feet (6.5 Meters) tall, located at Tanta in the center of Egypt, provides AM broadcast service at 1.16 MHz (258 Meters) to millions of people from Cairo north to the coast. Certified measurements provide evidence that this small CFA produces a radiated signal almost 6 dB stronger than the previous 1/4 wavelength vertical broadcast tower which was 211 feet (65 Meters) tall. To express the performance a different way >> with the tall tower, a 100,000 watt transmitter was required for the desired coverage. With the miniature CFA the same coverage was attained with the transmitter power reduced to 30,000 watts." The following site will be of interest. http://www.luminet.net/~wenonah/cfa/ http://www.antennex.com/preview/cfa/cfa.htm http://www.radioworld.com/reference-room/Cross-Field-Antenna/2000/rw-rackley 1-doc.html http://www.wbeonline.com/html/2000/Oct.news/crossfield_10_23_00.htm Martin M5CIX From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11341 invoked from network); 9 Dec 2000 10:01:41 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 9 Dec 2000 10:01:41 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 17027 invoked from network); 9 Dec 2000 09:56:43 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 9 Dec 2000 09:56:43 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144geH-0003bU-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 09:50:33 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from finch-post-10.mail.demon.net ([194.217.242.38]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144geG-0003bP-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 09:50:32 +0000 Received: from telemetry.demon.co.uk ([194.222.19.114]) by finch-post-10.mail.demon.net with smtp (Exim 2.12 #1) id 144ge9-0001Kl-0A for rsgb_lf_group@blacksheep.org; Sat, 9 Dec 2000 09:50:26 +0000 Message-ID: <1xsDgAAh9fM6EwkK@telemetry.demon.co.uk> Date: Sat, 9 Dec 2000 09:46:09 +0000 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: LF: Jim on 73 MIME-Version: 1.0 X-Mailer: Turnpike (32) Trial Version 3.05 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Jim Good solid 579 in Devon on 73 SSCW this morning. 73, Tom G3OLB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3375 invoked from network); 9 Dec 2000 09:13:13 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 9 Dec 2000 09:13:13 -0000 Received: (qmail 10609 invoked from network); 9 Dec 2000 09:15:18 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 9 Dec 2000 09:15:18 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144fzl-0003SQ-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 09:08:41 +0000 Received: from mail2.svr.pol.co.uk ([195.92.193.210]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144fzj-0003SL-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 09:08:39 +0000 Received: from modem-229.barium.dialup.pol.co.uk ([62.136.47.229] helo=default) by mail2.svr.pol.co.uk with smtp (Exim 3.13 #0) id 144fyn-00071g-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 09:07:42 +0000 Message-ID: <000001c061be$e91f5880$e52f883e@default> From: "MAL HAMILTON" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: SV: RE: Re:amplifiers Date: Fri, 8 Dec 2000 18:42:53 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: -----Original Message----- From: Johan Bodin To: rsgb_lf_group@blacksheep.org Date: 08 December 2000 17:42 Subject: LF: SV: RE: Re:amplifiers Andy and All >The parasitic diode is no good in this configuration for catching the >spikes from what I call the transient soak choke, I use separate clamp >diodes up to the rails effectively 'crosing over' the centre tapped >choke - see the circuit in the new LF Experimenters Book. I see. Yes, the MOSFET parasitic diodes are known to be slow. I will get a copy of the new LF book and have a look at the circuit. >By my reckoning no extra filtering is then necessary as second harmonic >is practically non existant due to the square wave drive, and third >harmonic is 26dB down to start with due to the tank and then seriously >reduced further by the antenna loading coil. True, but watch out for HF, and even VHF, radiation from the wire between the FETs and the series tuned circuit. I mesaured rise times of a few tens of nanoseconds on my experimental 4 * IRF640 H-bridge and the harmonics were strong even on my 144 MHz receiver! Well, the PA was breadboarded and the "hot wire" was half a meter long. A metal case enclosing the PA and the series circuit will probably help... >I also have it on good authority from a transmitter designer, that the >classic PI filter with input C is VERY bad news for using at the output >of MOSFET PAs. Class D PAs come in two flavours. Current switching and Voltage switching. Full and half H-bridges (the Decca TX has this configuration I guess?) are voltage switching amplifiers where the drain voltage is a square wave and the fundamental frequency energy is sucked out by a series resonant circuit to the load. The transistor current is sinusoidal for obvious reasons. One half period per transistor. Yes, a C input filter is really bad news in this case as it would lead to infinite current spikes if all components were ideal... Current switching PAs, on the other hand, works the other way around. The current through the transistors is a square wave (a constant DC current that is alternating between the devices) while the voltage (across the "off" transistor) is sinusoidal. This kind of PA *NEEDS* a C input filter, or a parallel tuned tank. The choke feeding the center tap of the output transformer is very important since it keeps the DC current constant over the RF period (the voltage at the center tap is NOT a steady DC!) This circuit is probably more likely to blow FETs than the voltage switching circuit. I can imagine two reasons for this: 1 - the DC feeding choke (and the leak inductance in the transformer) will kick up the voltage during the drive gap, 2 - a load mismatch may kill the transistors with excessive voltage (depending on LPF design). Some kind of "spike eaters" such as Zobel networks (R+C) are necessary to protect the transistors. The G3YXM design is a well known example of a current switching PA. 73 Johan SM6LKM While my observations would agree with the above facts. Care without a lot of inbuilt protection is necessary. I use the YXM approach and todate have never blown any fets at power out levels of 800w. My equipment is all home built and arranged to match 50 ohms throughout the system. I tune up using the SWR method ie min ref in conjunction with max forward. I DO NOT tune for max SMOKE/RF OUT. This is FATAL to FETS in the PA. When tuning up with an ammeter in cct but using the SWR method swinging the resonsant point either side of resonance will indicate an increase in RF out on the ammeter also if you are monitoring the DC amps applied to the FETS it will increase to dangerous levels ie BLOW UP. I know some by their own admittance only use the tune for max smoke method and blow FETS GALORE. Only when they have been converted to the swr method have they ceased to blow up the PA'S. This info should be OLD HAT but it is surprising how many LFers and others that should know better have been caught out. Tube amps are more rugged and will normally stand the strain, at least you get some warning and adjust accordingly. Fets just silently go. ALSO What person with any sense would operate into an erratic load where the swr is fluctuating wildly ie shabby antenna blowing about in the wind. If you blow fets under these circumstances you do not deserve sympathy. Use a stable antenna or go qrt under adverse wx conditions. G3KEV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19088 invoked from network); 9 Dec 2000 07:33:49 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 9 Dec 2000 07:33:49 -0000 Received: (qmail 17083 invoked from network); 9 Dec 2000 07:35:55 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 9 Dec 2000 07:35:55 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144eL6-000363-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 07:22:36 +0000 Received: from mailman.zeta.org.au ([203.26.10.16]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144eL4-00035y-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 07:22:35 +0000 Received: from steve (ppp243.dyn154.pacific.net.au [210.23.154.243]) by mailman.zeta.org.au (8.8.7/8.8.7) with SMTP id SAA29574 for ; Sat, 9 Dec 2000 18:22:23 +1100 Message-ID: <001b01c061b0$f54d5c00$0301a8c0@steve> From: "Steve Olney" To: rsgb_lf_group@blacksheep.org References: <200012081559.KAA6713991@indyweb.cgocable.ca> Subject: LF: Re: QRSS - "LEK" raw data available Date: Sat, 9 Dec 2000 18:22:18 +1100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: If you are interested there are some GIFs of the spectrum of the raw data at a BW of 0.125Hz and 0.0625Hz uploaded on my site. Go to the URL below and scroll down to the LF section and click on the "LEK QRSSS Reception" link 73s Steve Olney (VK2ZTO/AXSO - QF56IK : Lat -33 34 07, Long +150 44 40) ============================================= HomePage URLs: http://www.qsl.net/vk2zto http://www.zeta.org.au/~ollaneg Containing:- ULF, ELF, VLF & LF Experimentation InfraSonic Experimentation Laser Comms DX Amateur Radio Astronomy ============================================= From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22001 invoked from network); 9 Dec 2000 00:52:06 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 9 Dec 2000 00:52:06 -0000 Received: (qmail 28533 invoked from network); 9 Dec 2000 00:54:16 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 9 Dec 2000 00:54:16 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144YAh-0001i8-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Dec 2000 00:47:27 +0000 Received: from jaws.cisco.com ([198.135.0.150] helo=cisco.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144YAf-0001i3-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Dec 2000 00:47:25 +0000 Received: from virgin.net (dhcp-171-71-229-72.cisco.com [171.71.229.72]) by cisco.com (8.8.8/2.6/Cisco List Logging/8.8.8) with ESMTP id AAA02366 for ; Sat, 9 Dec 2000 00:47:10 GMT X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A318103.DF9C09CD@virgin.net> Date: Sat, 09 Dec 2000 00:47:00 +0000 From: "Stewart Bryant" X-Mailer: Mozilla 4.73 [en]C-CCK-MCD (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re: Re: 73 khz permits References: <19005797.976316381886.JavaMail.imail@magic.excite.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I agree. Stewart, g3ysx john sexton wrote: > In my opinion, the Low Frequency Experimenter's handbook is very well done > and excellent value. Thanks Peter for a job well done. > John, G4CNN > > _______________________________________________________ > Tired of slow Internet? Get @Home Broadband Internet > http://www.home.com/xinbox/signup.html From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13114 invoked from network); 8 Dec 2000 23:08:08 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 8 Dec 2000 23:08:08 -0000 Received: (qmail 25832 invoked from network); 8 Dec 2000 23:10:15 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 8 Dec 2000 23:10:15 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144WV4-0001Fi-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Dec 2000 23:00:22 +0000 Received: from ewey-rwcmta.excite.com ([198.3.99.191] helo=ewey.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144WV0-0001FG-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Dec 2000 23:00:18 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from magic.excite.com ([199.172.148.161]) by ewey.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001208225941.JQVB14379.ewey.excite.com@magic.excite.com> for ; Fri, 8 Dec 2000 14:59:41 -0800 Message-ID: <19005797.976316381886.JavaMail.imail@magic.excite.com> Date: Fri, 8 Dec 2000 14:59:38 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re: Re: 73 khz permits MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 213.104.153.17 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In my opinion, the Low Frequency Experimenter's handbook is very well done and excellent value. Thanks Peter for a job well done. John, G4CNN _______________________________________________________ Tired of slow Internet? Get @Home Broadband Internet http://www.home.com/xinbox/signup.html From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19351 invoked from network); 8 Dec 2000 20:52:50 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 8 Dec 2000 20:52:50 -0000 Received: (qmail 27657 invoked from network); 8 Dec 2000 20:54:57 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 8 Dec 2000 20:54:57 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144UOx-0000kV-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Dec 2000 20:45:55 +0000 Received: from [212.239.30.36] (helo=mail.jumpy.it) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144UOu-0000kK-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Dec 2000 20:45:53 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from mailsrv.dii.unisi.it (213.213.9.136) by mail.jumpy.it (5.1.050) id 3A2D1C72000306ED for rsgb_lf_group@blacksheep.org; Fri, 8 Dec 2000 21:45:42 +0100 Message-ID: <3A31484C.5AF2C5CA@mailsrv.dii.unisi.it> Date: Fri, 08 Dec 2000 21:45:00 +0100 From: "Valerio" X-Mailer: Mozilla 4.61 [en] (X11; I; Linux 2.2.12-20 i586) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: IK2PII Content-Type: text/plain; charset=iso-8859-15; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Claudio and all, IK2PII signals received in Pistoia (JN53KX) with enaugh strenght to ear them but no S-meter reading. '73, Valerio (IK5ZPV) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15238 invoked from network); 8 Dec 2000 20:36:27 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 8 Dec 2000 20:36:27 -0000 Received: (qmail 3911 invoked from network); 8 Dec 2000 20:31:29 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 8 Dec 2000 20:31:29 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144U0x-0000eS-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Dec 2000 20:21:07 +0000 Received: from fep02.swip.net ([130.244.199.130] helo=fep02-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144U0w-0000eN-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Dec 2000 20:21:06 +0000 Received: from W98 ([212.151.28.205]) by fep02-svc.swip.net (InterMail vM.5.01.01.01 201-252-104) with SMTP id <20001208202024.BAEP1660.fep02-svc.swip.net@W98> for ; Fri, 8 Dec 2000 21:20:24 +0100 Message-ID: <004301c06154$265314a0$cd1c97d4@W98.swipnet.se> From: "Christer Andersson" To: rsgb_lf_group@blacksheep.org Subject: SV: LF: Toroid cores Date: Fri, 8 Dec 2000 21:18:51 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: G4MD wrote: >>Can anyone point me to any sources that will give me information on core >>mixes, properties and design criteria to assist me in realising output >>transformers for an LF PA? Perhaps this page can be of some interest: http://www.micrometals.com/software.html 73 Christer sm6pxj From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5228 invoked from network); 8 Dec 2000 19:04:57 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 8 Dec 2000 19:04:57 -0000 Received: (qmail 19055 invoked from network); 8 Dec 2000 18:59:56 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 8 Dec 2000 18:59:56 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144Saj-0000JT-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Dec 2000 18:49:57 +0000 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144Sai-0000JN-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Dec 2000 18:49:56 +0000 Received: from [147.197.200.44] (helo=gemini) by hestia.herts.ac.uk with esmtp (Exim 3.16 #4) id 144SY8-0000pV-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Dec 2000 18:47:16 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3467.200012081849@gemini> From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Fri, 8 Dec 2000 18:52:52 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: Re:amplifiers In-reply-to: <004501c0613c$5ef63660$a15497d4@oemcomputer> X-Mailer: Pegasus Mail for Win32 (v3.11) Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF Group, Andy Wrote: > >The parasitic diode is no good in this configuration for catching the > >spikes from what I call the transient soak choke, I use separate clamp > >diodes up to the rails effectively 'crosing over' the centre tapped choke > >- see the circuit in the new LF Experimenters Book. I think this is the main function of the "transient soak" chokes in the Decca design - diverting the current into the fast diodes rather than through the Mosfet diodes during the switching transient. There is not much chance of cross conduction through the mosfets, since the transformer coupled gate circuit inherently prevents the gate drive from overlapping. Johan wrote: ........Current switching and Voltage switching. > Full and half H-bridges (the Decca TX has this configuration I guess?) are > voltage switching amplifiers where the drain voltage is a square wave and > the fundamental frequency energy is sucked out by a series resonant > circuit to the load. The Decca design is indeed a voltage-switching full bridge - but the series resonant tank circuit has a high impedance everywhere except the output frequency, so it won't see a capacitive load at the harmonics - mine seems quite happy running into a 2 x pi section low pass filter. There are some fairly nasty looking spikes which seem to be produced by the drive circuit that reach the output one way or another otherwise - although I'm not sure if they are actually there, or just being coupled into the output monitor wiring, which runs through one of the PA compartments. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10922 invoked from network); 8 Dec 2000 18:20:22 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 8 Dec 2000 18:20:22 -0000 Received: (qmail 6436 invoked from network); 8 Dec 2000 18:15:20 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 8 Dec 2000 18:15:20 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144RyC-00007b-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Dec 2000 18:10:08 +0000 Received: from cmailg1.svr.pol.co.uk ([195.92.195.171]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144RyA-00007W-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Dec 2000 18:10:06 +0000 Received: from modem-567.white-faced-ibis.dialup.pol.co.uk ([62.137.218.55] helo=default) by cmailg1.svr.pol.co.uk with smtp (Exim 3.13 #0) id 144Ry3-0004mE-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Dec 2000 18:10:00 +0000 Message-ID: <000901c06141$630f75e0$37da893e@default> From: "MAL HAMILTON" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Re: 73 khz permits Date: Fri, 8 Dec 2000 17:54:22 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: -----Original Message----- From: mike.dennison To: rsgb_lf_group@blacksheep.org Date: 07 December 2000 19:59 Subject: LF: Re: 73 khz permits >G3KEV wrote: >> the band was extended for a total of 3 years it was still the policy in >> spite of the fact that all the existing permits holders that were active >> were all south of Birmingham. For genuine experimental purposes this did >not >> make sense. Surely what was needed was a spread of experimenters covering >> the North of England, Scotland and N. Ireland. But according to postings >on >> the reflector the rsgb did not contemplate any more permits. > >The decision not to issue any more permits was nothing at all to do with the >RSGB. It is ludicrous to suggest that the Society would work to deliberately >disadvantage any radio amateur. Mike om Your words NOT mine You also surely must have heard of Government LEAKS rsgb LEAKS GAS LEAKS WATER LEAKS and Welsh Leeks On the contrary, the decision to start >issuing the NoVs again was a direct result of representations by the >Society. If you don't believe me, read the RA's Press Release on their web >site. > >Mike, G3XDV > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1240 invoked from network); 8 Dec 2000 18:12:53 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 8 Dec 2000 18:12:53 -0000 Received: (qmail 6651 invoked from network); 8 Dec 2000 18:15:36 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 8 Dec 2000 18:15:36 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144Ry4-000077-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Dec 2000 18:10:00 +0000 Received: from cmailg1.svr.pol.co.uk ([195.92.195.171]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144Ry3-000072-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Dec 2000 18:09:59 +0000 Received: from modem-567.white-faced-ibis.dialup.pol.co.uk ([62.137.218.55] helo=default) by cmailg1.svr.pol.co.uk with smtp (Exim 3.13 #0) id 144Rxu-0004mE-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Dec 2000 18:09:51 +0000 Message-ID: <000701c06141$5e2dc400$37da893e@default> From: "MAL HAMILTON" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Re: 73 khz permits Date: Fri, 8 Dec 2000 15:44:19 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: -----Original Message----- From: mike.dennison To: rsgb_lf_group@blacksheep.org Date: 07 December 2000 19:59 Subject: LF: Re: 73 khz permits >G3KEV wrote: >> the band was extended for a total of 3 years it was still the policy in >> spite of the fact that all the existing permits holders that were active >> were all south of Birmingham. For genuine experimental purposes this did >not >> make sense. Surely what was needed was a spread of experimenters covering >> the North of England, Scotland and N. Ireland. But according to postings >on >> the reflector the rsgb did not contemplate any more permits. This is what you said on a number of occassions. > >The decision not to issue any more permits was nothing at all to do with the >RSGB. It is ludicrous to suggest that the Society would work to deliberately >disadvantage any radio amateur. These are your words NOT mine I am only quoting what you have been saying in postings to the reflector on behalf of the rsgb about no more permits being issued. You have repeated this a number of times when the subject came up about the 73 khz band but you said nothing about why more permits COULD NOT be issued, and if there was opposition by the RA why the rsgb was not persuing the matter especially when the band use had been extended for another 3 years. Why suddenly are permits being issued again. What has dramatically changed ? Has the rsgb been put under pressure by some of its members to do something about it ? Have others gone direct to the RA for clarification or satisfaction? Is it true that one permit had been issued while there was a so called ban? To avoid further speculation please answer the above questions since you seem to be the rsgb spokesman and you say you know what is going on. Dont keep fellow radio amateurs in the DARK I personally go direct to the RA for clarification but would like to hear your side of the story. I realise you are busy at present sorting out the rsgb LF handbook fiasco if recent posting are correct or is this all fiction too !!!!!!!!!!!73 G3KEV On the contrary, the decision to start >issuing the NoVs again was a direct result of representations by the >Society. This should have been done automatically at the same time as the 3 year extension was under discussion. Did you forget to mention it ? If you don't believe me, read the RA's Press Release on their web >site. > >Mike, G3XDV > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28959 invoked from network); 8 Dec 2000 17:44:11 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 8 Dec 2000 17:44:11 -0000 Received: (qmail 3233 invoked from network); 8 Dec 2000 17:39:09 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 8 Dec 2000 17:39:09 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144RKq-0008UX-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Dec 2000 17:29:28 +0000 Received: from fep02.swip.net ([130.244.199.130] helo=fep02-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144RKo-0008SQ-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Dec 2000 17:29:27 +0000 Received: from oemcomputer ([212.151.84.161]) by fep02-svc.swip.net (InterMail vM.5.01.01.01 201-252-104) with SMTP id <20001208172844.NJC1660.fep02-svc.swip.net@oemcomputer> for ; Fri, 8 Dec 2000 18:28:44 +0100 Message-ID: <004501c0613c$5ef63660$a15497d4@oemcomputer> From: "Johan Bodin" To: rsgb_lf_group@blacksheep.org Subject: LF: SV: RE: Re:amplifiers Date: Fri, 8 Dec 2000 18:29:00 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Andy and All >The parasitic diode is no good in this configuration for catching the >spikes from what I call the transient soak choke, I use separate clamp >diodes up to the rails effectively 'crosing over' the centre tapped >choke - see the circuit in the new LF Experimenters Book. I see. Yes, the MOSFET parasitic diodes are known to be slow. I will get a copy of the new LF book and have a look at the circuit. >By my reckoning no extra filtering is then necessary as second harmonic >is practically non existant due to the square wave drive, and third >harmonic is 26dB down to start with due to the tank and then seriously >reduced further by the antenna loading coil. True, but watch out for HF, and even VHF, radiation from the wire between the FETs and the series tuned circuit. I mesaured rise times of a few tens of nanoseconds on my experimental 4 * IRF640 H-bridge and the harmonics were strong even on my 144 MHz receiver! Well, the PA was breadboarded and the "hot wire" was half a meter long. A metal case enclosing the PA and the series circuit will probably help... >I also have it on good authority from a transmitter designer, that the >classic PI filter with input C is VERY bad news for using at the output >of MOSFET PAs. Class D PAs come in two flavours. Current switching and Voltage switching. Full and half H-bridges (the Decca TX has this configuration I guess?) are voltage switching amplifiers where the drain voltage is a square wave and the fundamental frequency energy is sucked out by a series resonant circuit to the load. The transistor current is sinusoidal for obvious reasons. One half period per transistor. Yes, a C input filter is really bad news in this case as it would lead to infinite current spikes if all components were ideal... Current switching PAs, on the other hand, works the other way around. The current through the transistors is a square wave (a constant DC current that is alternating between the devices) while the voltage (across the "off" transistor) is sinusoidal. This kind of PA *NEEDS* a C input filter, or a parallel tuned tank. The choke feeding the center tap of the output transformer is very important since it keeps the DC current constant over the RF period (the voltage at the center tap is NOT a steady DC!) This circuit is probably more likely to blow FETs than the voltage switching circuit. I can imagine two reasons for this: 1 - the DC feeding choke (and the leak inductance in the transformer) will kick up the voltage during the drive gap, 2 - a load mismatch may kill the transistors with excessive voltage (depending on LPF design). Some kind of "spike eaters" such as Zobel networks (R+C) are necessary to protect the transistors. The G3YXM design is a well known example of a current switching PA. 73 Johan SM6LKM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28910 invoked from network); 8 Dec 2000 17:44:08 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 8 Dec 2000 17:44:08 -0000 Received: (qmail 3196 invoked from network); 8 Dec 2000 17:39:06 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 8 Dec 2000 17:39:06 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144RKQ-0008SW-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Dec 2000 17:29:02 +0000 Received: from fep02.swip.net ([130.244.199.130] helo=fep02-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144RKM-0008SM-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Dec 2000 17:28:58 +0000 Received: from oemcomputer ([212.151.84.161]) by fep02-svc.swip.net (InterMail vM.5.01.01.01 201-252-104) with SMTP id <20001208172814.NHT1660.fep02-svc.swip.net@oemcomputer> for ; Fri, 8 Dec 2000 18:28:14 +0100 Message-ID: <004001c0613c$4d26e2e0$a15497d4@oemcomputer> From: "Johan Bodin" To: rsgb_lf_group@blacksheep.org Subject: LF: SV: CRUNCH method Date: Fri, 8 Dec 2000 18:27:45 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi >Decimation to lower the sampling rate is straightforward if wanted, >just by taking one sample out of every N. You'll need a decimation filter to keep aliases out if the original signal has spectral components that are above the decimated Fs/2 (Nyquist!). One way to accomplish this is to feed the original signal into the circular buffer of a FIR filter of suitable design, at the original Fs, and then compute the filter output at the decimated output Fs. 73 Johan SM6LKM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4781 invoked from network); 8 Dec 2000 16:14:42 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 8 Dec 2000 16:14:42 -0000 Received: (qmail 11150 invoked from network); 8 Dec 2000 16:09:46 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 8 Dec 2000 16:09:46 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144PwB-000876-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Dec 2000 15:59:55 +0000 Received: from indyweb.cgocable.ca ([205.151.69.200]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144PwA-000870-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Dec 2000 15:59:54 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from 220-155.lr.cgocable.ca (220-155.lr.cgocable.ca [24.226.220.155]) by indyweb.cgocable.ca (8.9.3 (MessagingDirect 1.0.4)/8.9.3) with SMTP id KAA6713991; Fri, 8 Dec 2000 10:59:46 -0500 (EST) Message-ID: <200012081559.KAA6713991@indyweb.cgocable.ca> X-Sender: bill1@cgocable.ca X-Mailer: Windows Eudora Light Version 1.5.2 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Date: Fri, 08 Dec 2000 10:58:20 -0500 To: rsgb_lf_group@blacksheep.org, lowfer@qth.net From: "Bill de Carle" Subject: LF: QRSS - "LEK" raw data available Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I made another pass at LEK's QRSS-CW signal last night and managed to get some excellent data for analysis. I set the machine to record from 5:15 am thru 7:00 am local (EST) time. After I crunched the raw data, LEK's CW ident was clearly audible in there for most of that time. Conditions seemed to be very good last night, weather was clear and crisp (overnight low here was minus 28C, about 18 degrees below zero F, and that would have occurred pretty much right while I was recording). The raw data file is a little over 100 Mb, so I extracted a representative sample which crunches down to about the same signal quality I posted last time. The raw data was sampled at 8200 samples per second, 16-bit signed binary. There is a file called SLIVER02.AUD which has 665640 samples of this data, about 81 seconds of audio. If you CRUNCH it you can recover one complete "LEK " ident sequence that sounds fine. If you're interested you can download the file (about 1 Mb) from: http://cafe.rapidus.net/bill1/sliver02.zip Bill VE2IQ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7880 invoked from network); 8 Dec 2000 15:57:46 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 8 Dec 2000 15:57:46 -0000 Received: (qmail 3150 invoked from network); 8 Dec 2000 16:00:34 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 8 Dec 2000 16:00:34 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144Po7-00084W-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Dec 2000 15:51:35 +0000 Received: from indyweb.cgocable.ca ([205.151.69.200]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144Po3-00084R-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Dec 2000 15:51:31 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from 220-155.lr.cgocable.ca (220-155.lr.cgocable.ca [24.226.220.155]) by indyweb.cgocable.ca (8.9.3 (MessagingDirect 1.0.4)/8.9.3) with SMTP id KAA6735646 for ; Fri, 8 Dec 2000 10:51:21 -0500 (EST) Message-ID: <200012081551.KAA6735646@indyweb.cgocable.ca> X-Sender: bill1@cgocable.ca X-Mailer: Windows Eudora Light Version 1.5.2 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Date: Fri, 08 Dec 2000 10:49:55 -0500 To: rsgb_lf_group@blacksheep.org From: "Bill de Carle" Subject: Re: LF: LEK's QRSS-CW signal copied in Canada using CRUNCH Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: At 01:03 PM 12/8/00, Rik ON7YD wrote: >Hello Bill, > >Congrats on the QRSS reception of LEK. A distance of 1500km seems very good >for just 1W input. Would be interesting to know at what time you copied >LEK. CFH (on Canadian naval station on 137kHz) had a very huge peak in the >UK on 6 december arround 6UT. It was just before our local sunup - around 6 am EST or 1100 utc. I did another run last night and got very good copy throughout the first part of the recording session 5:15 am thru 7:00 am EST. I extracted some of the raw data if anyone wants to look at it with a spectral display. It's a lot to download, about 1 Megabyte, byte if you're interested you can get it off my webpage: http://cafe.rapidus.net/bill1/sliver02.zip Bill VE2IQ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13503 invoked from network); 8 Dec 2000 11:48:57 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 8 Dec 2000 11:48:57 -0000 Received: (qmail 16687 invoked from network); 8 Dec 2000 11:51:03 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 8 Dec 2000 11:51:03 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144Lr5-00076B-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Dec 2000 11:38:23 +0000 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144Lr4-000766-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Dec 2000 11:38:22 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.200.44] (helo=gemini) by hestia.herts.ac.uk with esmtp (Exim 3.16 #4) id 144LoX-0001qq-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Dec 2000 11:35:45 +0000 Message-ID: <5426.200012081138@gemini> From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Fri, 8 Dec 2000 11:41:21 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: 73kHz Tonight X-Mailer: Pegasus Mail for Win32 (v3.11) Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF Group, I intend to be QRV on 73kHz this evening from about 2000utc. I will use 71.65kHz, unless other stations want to use it for manual CW. In that case, I will use my "normal" QRSS frequency of 71.81kHz +/- QRM. I will have a listen to see if anyone else wanting a QSO is on 73kHz, but mostly listen on about 137.7kHz for cross-band contacts. When I checked this morning, Rugby, which has been transmitting only carriers for the past few days, was off the air all together. The QRN was also low, so it might be a quiet evening on the band. However, the wind is very strong today, so it may not be possible to have my antenna at it's full height. I also hope to be on 73kHz tomorrow from about 0800 - 1000, listening around 137.7 for cross-band contacts. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4205 invoked from network); 8 Dec 2000 11:19:48 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 8 Dec 2000 11:19:48 -0000 Received: (qmail 298 invoked from network); 8 Dec 2000 11:21:58 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 8 Dec 2000 11:21:58 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144LRS-0006zI-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Dec 2000 11:11:54 +0000 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144LRR-0006zD-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Dec 2000 11:11:53 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail.cc.kuleuven.ac.be (8.9.3/8.9.0) with SMTP id MAA18754 for ; Fri, 8 Dec 2000 12:11:43 +0100 Message-ID: <3.0.1.16.20001208130344.2e07d346@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Fri, 08 Dec 2000 13:03:44 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: LEK's QRSS-CW signal copied in Canada using CRUNCH In-reply-to: <200012062125.QAA6027635@indyweb.cgocable.ca> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Bill, Congrats on the QRSS reception of LEK. A distance of 1500km seems very good for just 1W input. Would be interesting to know at what time you copied LEK. CFH (on Canadian naval station on 137kHz) had a very huge peak in the UK on 6 december arround 6UT. 73, Rik ON7YD At 16:23 6/12/00 -0500, you wrote: >If you go to my web page at: > >http://cafe.rapidus.net/bill1/bbs.htm > >down at the bottom of the page you'll find a link you can use to >download a file called QRSS-LEK.ZIP - it has a few seconds of WAV >file snipped from last night's overnight CRUNCH run trying to hear >lowfer LEK. > >Although I've copied Lyle before using BPSK, I believe this is the first >time I copied him on CW; the signal came through in the wee hours of the >morning, Wednesday Dec. 6th, 2000. I have Lyle's co-ordinates in >Aitkin MN as 46.53013N, 93.71042W and my QTH in St-Adolphe d'Howard, PQ >Canada is at 45.9351N, 74.2993W. Just re-calculated the distance using >Clarke's ellipsoid: it works out to 1495 Km or 929 miles. > >Antenna was a 30 x 20 foot rectangular tuned loop. Rx was a Kenwood >TS850S with external freq standard. Computer was a Compaq laptop >with a 100 Mhz Pentium processor running CRUNCH V3.0. An S16 PCMCIA >soundcard was used for 16-bit audio input. CRUNCH settings were: >40:1 time compression, 800-Hz CW tone out, 300-Hz bandpass filter on >the output. If you have CoolEdit handy you can do a frequency analysis >of this file (select the entire snippet and press the SCAN button) - >it shows Lyle's signal on 800-Hz jutting up just a little over the >smoothed background noise envelope. > >If you listen carefully you can just hear Lyle's CW ident in there - >starting about halfway through the audio snippet, you'll hear "LEK" >very distinctly. The signal is weak so you may have to play it over >a few times in LOOP mode before you get it, but it's definitely there. >This is a good example of a signal that seems to come up out of the >noise when you listen to it over and over. It's the equivalent of >the "GRAB" process but done in your head. Pretty neat! > >VE2IQ > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2074 invoked from network); 8 Dec 2000 11:10:42 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 8 Dec 2000 11:10:42 -0000 Received: (qmail 3860 invoked from network); 8 Dec 2000 11:13:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 8 Dec 2000 11:13:26 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144LIY-0006y3-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Dec 2000 11:02:42 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144LIU-0006xv-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Dec 2000 11:02:38 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id LAA30519; Fri, 8 Dec 2000 11:02:50 GMT Received: (qmail 28128 invoked from network); 8 Dec 2000 11:57:59 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 8 Dec 2000 11:57:59 -0000 Received: by gauntlet.mail.dera.gov.uk; id LAA27581; Fri, 8 Dec 2000 11:53:09 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma027217; Fri, 8 Dec 00 11:51:12 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Fri, 8 Dec 2000 11:01:52 +0000 Received: by frn-gold-1.dera.gov.uk with Internet Mail Service (5.0.1460.8) id ; Fri, 8 Dec 2000 11:00:25 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D746E@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: CRUNCH method Date: Fri, 8 Dec 2000 11:00:08 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Bill et al-- Re your CRUNCH algorithm: Why not downconvert to zero frequency and preserve I/Q pairs in the positive and negative frequency domains, rather than a 'low' frequency that determines the audio tone and could be subject to alliassing effects. Then you only need to low pass the resulting samples at half the wanted bandwidth to effect an input bandpass function. Decimation to lower the sampling rate is straightforward if wanted, just by taking one sample out of every N. Upconversion to any other frequency is then performed in an SSB upconverter by multiplying I/Q pairs with SIN / COS to just give the one sideband. Regard the zero IF samples as being speeded up by nominating (labelling) the value of the sample rate accordingly, multiply by SIN / COS pairs of the centre frequency you want to listen at, sampled at this new sampling rate, and store as a .WAV file. A similar technique I wrote for off air signal analysis records a chunk of spectrum filtered in the receiver to 16kHz, sampled at 44100Hz to an input .WAV file. By selecting centre frequencies and signal bandwidths of interest, then downconverting / decimating as above to decode multiple channels simultaneously. The result is a software receiver than can decode (not in real time of course) arbitrarily narrow channel bandwidths at any suitable sampling rate at sub-multiples of 44100 Hz which can then be passed on to demodulators etc. Andy G4JNT > -----Original Message----- > From: Bill de Carle [mailto:bill1@cgocable.ca] > Sent: 2000-12-07 16:54 > To: rsgb_lf_group@blacksheep.org > Subject: Re: LF: VE2IQ's .WAV file /73kHz > > around the frequency of interest. The basic process I use is to *mix* > the signal down to some very low frequency (in this case 800 Hz was > mixed down to 20 Hz) - then to *multiply* it back up to 800 Hz. The > frequency multiplication process is what makes the desired signal seem > to stand out all by itself. For example, if there was an interfering > carrier 10 Hz away from LEK's signal, after mixing down it would still > be 10 Hz away, but after multiplying back up to 800 Hz it > would be 400 Hz > away and then gets taken out by the 300 Hz bandpass filter on the > output. I could have used a much *narrower* bandpass filter on the > output in this particular case because I know Lyle's station is always > right on the published frequency, but in general I keep it > wide because > lowfer beacons are often several Hz off frequency and they risk going > outside the passband (after multiplication) if the filter is > too narrow. > > Bill VE2IQ > > -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3980 invoked from network); 8 Dec 2000 10:48:17 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 8 Dec 2000 10:48:17 -0000 Received: (qmail 25518 invoked from network); 8 Dec 2000 10:51:05 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 8 Dec 2000 10:51:05 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144Kro-0006oz-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Dec 2000 10:35:04 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144Krn-0006ot-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Dec 2000 10:35:03 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id KAA25011; Fri, 8 Dec 2000 10:35:17 GMT Received: (qmail 257 invoked from network); 8 Dec 2000 09:24:17 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 8 Dec 2000 09:24:17 -0000 Received: by gauntlet.mail.dera.gov.uk; id JAA01736; Fri, 8 Dec 2000 09:12:17 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma001725; Fri, 8 Dec 00 09:12:03 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Fri, 8 Dec 2000 08:22:45 +0000 Received: by frn-gold-1.dera.gov.uk with Internet Mail Service (5.0.1460.8) id ; Fri, 8 Dec 2000 08:21:19 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D746B@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: Re:amplifiers Date: Fri, 8 Dec 2000 08:21:21 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Yes I do use such a beast for testing, couldn't use a scope safely on the Tx otherwise ! But afterwards, since the PA is isolated by well insulated transformers at input and output, the isolating transformer can be left out making for a very compact PA Andy > -----Original Message----- > From: Vernall [mailto:vernall@xtra.co.nz] > Sent: 2000-12-07 20:14 > To: rsgb_lf_group@blacksheep.org > Subject: LF: Re: Re:amplifiers > > > If rectified mains power supplies are to be considered, one > way to improve > safety is to use a 1:1 isolating transformer, which are > fairly available. > It should at least be used for doing development or any testing. > -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21423 invoked from network); 8 Dec 2000 10:46:37 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 8 Dec 2000 10:46:37 -0000 Received: (qmail 13951 invoked from network); 8 Dec 2000 10:41:40 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 8 Dec 2000 10:41:40 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144KnZ-0006of-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Dec 2000 10:30:41 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144KnX-0006oa-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Dec 2000 10:30:39 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id KAA22474; Fri, 8 Dec 2000 10:30:48 GMT Received: (qmail 856 invoked from network); 8 Dec 2000 09:36:37 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 8 Dec 2000 09:36:37 -0000 Received: by gauntlet.mail.dera.gov.uk; id JAA02247; Fri, 8 Dec 2000 09:31:49 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma002241; Fri, 8 Dec 00 09:31:43 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Fri, 8 Dec 2000 08:42:25 +0000 Received: by frn-gold-1.dera.gov.uk with Internet Mail Service (5.0.1460.8) id ; Fri, 8 Dec 2000 08:40:59 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D746C@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: Re:amplifiers Date: Fri, 8 Dec 2000 08:41:02 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: The parasitic diode is no good in this configuration for catching the spikes from what I call the transient soak choke, I use separate clamp diodes up to the rails effectively 'crosing over' the centre tapped choke - see the circuit in the new LF Experimenters Book. I once met this impedance inverting effect the hard way with an earlier PA and it shows up very clearly in simulations. Here I rely on the series tuned tank circuit to perform most of the filtering; that has no Z inverting action but with the expense of slightly extra loss. By my reckoning no extra filtering is then necessary as second harmonic is practically non existant due to the square wave drive, and third harmonic is 26dB down to start with due to the tank and then seriously reduced further by the antenna loading coil. I don't think the Decca transmitters used any filtering other than the tank circuit. I also have it on good authority from a transmitter designer, that the classic PI filter with input C is VERY bad news for using at the output of MOSFET PAs. The shunt cap presents a low impedance to harmonics and increases circulating currents to stress the devices unnecessarily. Better to use an input inductor in a Tee (or even order) filter even if it does mean having to use an extra inductor. A recent QEX magazine (the ARRL amateur experimeters journal) also had an excellent article on this and other aspects of PA design, last year. The author here went even further and used diplexing filters on the output of an HF PA - in my opinion a bit OTT. Andy 'JNT > > Yes, the "totem-pole" configuration is sort of self-clamping > if MOSFETs > are used. Did you add external (low Vf) diodes or do you rely on the > intrinsic diodes in the FETs? > > >As far as I can see, the only potential device destroyer is a low > >impedance load or short circuit. > > >By the look of the network, A detuned antenna will reflect back as an > >increased load impedance giving an inherent fail safe mechanism. > > The lowpass filter between the amp' and the antenna can turn > things upside > down when a severe mismatch occurs. For example, a simple pi > filter with > a Q of 1 (C1 across, L along, C2 across, all reactances equal > to line Z) > will "invert" the impedance like a lambda/4 length of > transmission line. > In case the filter output is open (antenna way off > resonance), L and C2 forms > a series resonant circuit which makes the filter input look > like a dead short at > the design frequency. On the other hand, A short on the > filter output causes the > input to look like an open circuit (C1 and L in parallel resonance)... > The impedance inverting properties of a simple pi filter can > be useful when the > antenna is fed via a tap or link on the loading coil but for > series fed antennas > I'd choose two cascaded pi filters (like the one on G3YXM web site). > > 73 > Johan SM6LKM > > > > -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20065 invoked from network); 8 Dec 2000 10:36:48 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 8 Dec 2000 10:36:48 -0000 Received: (qmail 11819 invoked from network); 8 Dec 2000 10:39:36 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 8 Dec 2000 10:39:36 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144Kfl-0006lt-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Dec 2000 10:22:37 +0000 Received: from mta05-svc.ntlworld.com ([62.253.162.45]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144Kfh-0006lo-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Dec 2000 10:22:33 +0000 Received: from oemcomputer ([213.104.100.152]) by mta05-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001208102228.ZOR8632.mta05-svc.ntlworld.com@oemcomputer> for ; Fri, 8 Dec 2000 10:22:28 +0000 Message-ID: <000401c06100$ab86b400$986468d5@oemcomputer> From: "mike.dennison" To: rsgb_lf_group@blacksheep.org References: <29778.200012071319@gemini> <00ae01c06088$922fd180$206b68d5@oemcomputer> Subject: LF: Re: Re:73kHz Date: Fri, 8 Dec 2000 10:21:22 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > I expect to be on 73 on Friday night, too. Will transmit QRSS on 71.05kHz, > looking for replies on the 71 and 137kHz bands. > > 73 > Mike, G3XDV OOps. I should have typed 71.605kHz. My excuse - I have a virus. That's me not the computer! Mike, G3XDV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22179 invoked from network); 7 Dec 2000 23:17:27 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 7 Dec 2000 23:17:27 -0000 Received: (qmail 19031 invoked from network); 7 Dec 2000 23:20:14 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 7 Dec 2000 23:20:14 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 144A43-0004R4-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 07 Dec 2000 23:02:59 +0000 Received: from laguna.tiscalinet.it ([195.130.224.86]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 144A41-0004Qz-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2000 23:02:58 +0000 Received: from tiscalinet.it (62.10.85.170) by laguna.tiscalinet.it; 8 Dec 2000 00:01:48 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A301459.F38C5F40@tiscalinet.it> Date: Thu, 07 Dec 2000 23:51:05 +0100 From: "Claudio" X-Mailer: Mozilla 4.73 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: 136 kHz transmission tests References: <3A2F4439.6553B511@alg.demon.co.uk> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Steve and all, OK for the suggestion. I'm sorry but for now I can't change the frequency because I transmit from my holiday home and I'm using a 27 Mhz CB Xtal on my transmitter. In my usual home I have two other Xtals, one for 135.975 kHz and the other one for 137.525 kHz. May be that one of those is good for a beacon? For the next week-end I change the frequency according yours suggestions. 73 de Claudio, IK2PII Steve Rawlings wrote: > > Hi Claudio! > You wrote: > > I'm planning to transmit some slow CW beacon from 7 to 10 > > december. My working conditions: QRG 136.375 kHz, > > Pout about 100W, 30 m wire antenna, > > QTH locator is jn45pu 50 km north Milano. > 136.375 kHz is not a very appropriate frequency for a beacon, as > it falls within the portion of the band 136.0 to 137.4 kHz > normally used for two-way conventional CW. I wonder whether you > have an alternative frequency? > > Regards to all, > Steve GW4ALG -- Claudio Pozzi http://www.qsl.net/ik2pii happy Linux user E-Mail: ---------------------------------------------------------------------- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12085 invoked from network); 7 Dec 2000 22:47:36 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 7 Dec 2000 22:47:36 -0000 Received: (qmail 18670 invoked from network); 7 Dec 2000 22:42:38 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 7 Dec 2000 22:42:38 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1449Qm-0004GQ-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 07 Dec 2000 22:22:24 +0000 Received: from twingo.tiscalinet.it ([195.130.224.85]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1449Qk-0004GL-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2000 22:22:23 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from tiscalinet.it (62.10.86.196) by twingo.tiscalinet.it; 7 Dec 2000 23:16:15 +0100 Message-ID: <3A300D43.F8FD7D96@tiscalinet.it> Date: Thu, 07 Dec 2000 23:20:51 +0100 From: "Claudio" X-Mailer: Mozilla 4.73 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org, "f5maf" Subject: LF: 136 kHz test Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hallo LF group, I confirm my transmitting tests. My beacon was on air this evening from 21.00 to 22.00 UTC on 136.375 kHz. I plan to transmit nes days as follow: 8 dec from 10.00 to 11.00 and from 20.00 to 21.00 UTC 9 dec from 10.00 to 11.00 and from 20.00 to 21.00 UTC 10 dec from 10.00 to 11.00 UTC Power out 100W about, 30 m random wire antenna, lossy coil :-( QTH locator JN45PU 45deg52'28"N, 9deg15'03"E All reports are wellcome 73 de Claudio, IK2PII -- Claudio Pozzi http://www.qsl.net/ik2pii happy Linux user E-Mail: ---------------------------------------------------------------------- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10174 invoked from network); 7 Dec 2000 20:54:00 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 7 Dec 2000 20:54:00 -0000 Received: (qmail 10769 invoked from network); 7 Dec 2000 20:56:08 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 7 Dec 2000 20:56:08 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1447wp-0003up-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 07 Dec 2000 20:47:23 +0000 Received: from fep03.swip.net ([130.244.199.131] helo=fep03-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1447wo-0003uj-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2000 20:47:22 +0000 Received: from oemcomputer ([212.151.86.119]) by fep03-svc.swip.net (InterMail vM.5.01.01.01 201-252-104) with SMTP id <20001207204645.ZJOZ6703.fep03-svc.swip.net@oemcomputer> for ; Thu, 7 Dec 2000 21:46:45 +0100 Message-ID: <007c01c0608e$da6ef060$775697d4@oemcomputer> From: "Johan Bodin" To: rsgb_lf_group@blacksheep.org Subject: LF: SV: Re:amplifiers Date: Thu, 7 Dec 2000 21:46:26 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Andy and All >The catch diodes clamp over-voltage spikes extremally well, in fact I >don't see any spikes at all on the breadboard design. Yes, the "totem-pole" configuration is sort of self-clamping if MOSFETs are used. Did you add external (low Vf) diodes or do you rely on the intrinsic diodes in the FETs? >As far as I can see, the only potential device destroyer is a low >impedance load or short circuit. >By the look of the network, A detuned antenna will reflect back as an >increased load impedance giving an inherent fail safe mechanism. The lowpass filter between the amp' and the antenna can turn things upside down when a severe mismatch occurs. For example, a simple pi filter with a Q of 1 (C1 across, L along, C2 across, all reactances equal to line Z) will "invert" the impedance like a lambda/4 length of transmission line. In case the filter output is open (antenna way off resonance), L and C2 forms a series resonant circuit which makes the filter input look like a dead short at the design frequency. On the other hand, A short on the filter output causes the input to look like an open circuit (C1 and L in parallel resonance)... The impedance inverting properties of a simple pi filter can be useful when the antenna is fed via a tap or link on the loading coil but for series fed antennas I'd choose two cascaded pi filters (like the one on G3YXM web site). 73 Johan SM6LKM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3881 invoked from network); 7 Dec 2000 20:48:58 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 7 Dec 2000 20:48:58 -0000 Received: (qmail 2980 invoked from network); 7 Dec 2000 20:51:03 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 7 Dec 2000 20:51:03 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1447mZ-0003rk-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 07 Dec 2000 20:36:47 +0000 Received: from anchor-post-33.mail.demon.net ([194.217.242.91]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1447mY-0003rf-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2000 20:36:47 +0000 Received: from alg.demon.co.uk ([194.222.171.80]) by anchor-post-33.mail.demon.net with esmtp (Exim 2.12 #1) id 1447mT-000CBL-0X for rsgb_lf_group@blacksheep.org; Thu, 7 Dec 2000 20:36:41 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A2F4439.6553B511@alg.demon.co.uk> Date: Thu, 07 Dec 2000 08:03:05 +0000 From: "Steve Rawlings" X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win98; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: 136 kHz transmission tests References: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Claudio! You wrote: > I'm planning to transmit some slow CW beacon from 7 to 10 > december. My working conditions: QRG 136.375 kHz, > Pout about 100W, 30 m wire antenna, > QTH locator is jn45pu 50 km north Milano. 136.375 kHz is not a very appropriate frequency for a beacon, as it falls within the portion of the band 136.0 to 137.4 kHz normally used for two-way conventional CW. I wonder whether you have an alternative frequency? Regards to all, Steve GW4ALG From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23139 invoked from network); 7 Dec 2000 20:15:17 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 7 Dec 2000 20:15:17 -0000 Received: (qmail 15519 invoked from network); 7 Dec 2000 20:17:25 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 7 Dec 2000 20:17:25 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1447ON-0003kl-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 07 Dec 2000 20:11:47 +0000 Received: from mta1-rme.xtra.co.nz ([203.96.92.1]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1447OL-0003ka-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2000 20:11:46 +0000 Received: from xtr743187 ([202.27.181.78]) by mta1-rme.xtra.co.nz with SMTP id <20001207201105.CKZQ8076195.mta1-rme.xtra.co.nz@xtr743187> for ; Fri, 8 Dec 2000 09:11:05 +1300 Message-ID: <009e01c0608a$62a1d420$21b21bca@xtr743187> From: "Vernall" To: rsgb_lf_group@blacksheep.org References: <65AECDF1F89AD411900400508BFC869F0D7469@pdw-mail-1.dera.gov.uk> Subject: LF: Re: Re:amplifiers Date: Fri, 8 Dec 2000 09:13:35 +1300 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2919.6600 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: ----- Original Message ----- > My main > driver for using a 340V rail was the need to not have to have a separate > PA. A 50V 25A PSU is fine if you can get one - I have an old telephone > exchange PSU - but normally it is a big beast if you have to make one > up, so multiple bridged lower voltage PAs is a complex way to go if > building from scratch, even if a lot safer. If rectified mains power supplies are to be considered, one way to improve safety is to use a 1:1 isolating transformer, which are fairly available. It should at least be used for doing development or any testing. 73, Bob From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15771 invoked from network); 7 Dec 2000 20:13:59 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 7 Dec 2000 20:13:59 -0000 Received: (qmail 3251 invoked from network); 7 Dec 2000 20:08:59 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 7 Dec 2000 20:08:59 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1447Fk-0003jH-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 07 Dec 2000 20:02:52 +0000 Received: from mta06-svc.ntlworld.com ([62.253.162.46]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1447Fj-0003jC-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2000 20:02:51 +0000 Received: from oemcomputer ([213.104.96.130]) by mta06-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001207200246.WLSR5778.mta06-svc.ntlworld.com@oemcomputer> for ; Thu, 7 Dec 2000 20:02:46 +0000 Message-ID: <00ae01c06088$922fd180$206b68d5@oemcomputer> From: "mike.dennison" To: rsgb_lf_group@blacksheep.org References: <29778.200012071319@gemini> Subject: LF: Re:73kHz Date: Thu, 7 Dec 2000 20:01:40 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: M0BMU wrote: > ................................I Hope to > be QRV friday evening, and will also try to be on Saturday morning - > earlier in the year, the mornings seemed to be better for DX > reception on 73k. This week I will be listening for cross band > contacts too. I expect to be on 73 on Friday night, too. Will transmit QRSS on 71.05kHz, looking for replies on the 71 and 137kHz bands. 73 Mike, G3XDV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1790 invoked from network); 7 Dec 2000 20:05:52 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 7 Dec 2000 20:05:52 -0000 Received: (qmail 9883 invoked from network); 7 Dec 2000 20:08:39 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 7 Dec 2000 20:08:39 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1447Fi-0003jA-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 07 Dec 2000 20:02:50 +0000 Received: from mta06-svc.ntlworld.com ([62.253.162.46]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1447Fh-0003j5-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2000 20:02:49 +0000 Received: from oemcomputer ([213.104.96.130]) by mta06-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001207200244.WLSF5778.mta06-svc.ntlworld.com@oemcomputer> for ; Thu, 7 Dec 2000 20:02:44 +0000 Message-ID: <00ad01c06088$90f88a00$206b68d5@oemcomputer> From: "mike.dennison" To: rsgb_lf_group@blacksheep.org References: <001501c05fd6$a86b0580$0acf01d5@default> Subject: LF: Re: CFH may be off Date: Thu, 7 Dec 2000 19:55:24 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: G3NYK wrote: > ........... The last peak at about 0600z was a terrific 46dBu > 200uV ) held for over one hour. What a great chance missed. This is the > highest level I have recorded and throws weight behind my belief that the > best time for a Trans-Atlantic qso would be in the final stages of a > disturbed period. This was seen before around the time Peter was first heard > on a 40dBu peak. We are in a Catch-22 at present. No-one is transmitting from Europe because no-one is listening, and no-one is listening . . . . . . It takes some effort to transmit 1W ERP all night safely so very few people would want to do it every night. Similarly I am sure that very few people would want to listen every night. 1) Is there anyone in the US/Canada regularly watching for QRSS from Eu? 2) If not, can we set some test times - every Saturday and Wednesday night, for instance - that Eu stations will transmit and NA stations will listen. 3) Is there anyone intending to transmit QRSS from NA for reception in Eu? It would be a pity to miss another period of good conditions. Mike, G3XDV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10757 invoked from network); 7 Dec 2000 19:48:33 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 7 Dec 2000 19:48:33 -0000 Received: (qmail 20241 invoked from network); 7 Dec 2000 19:51:17 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 7 Dec 2000 19:51:17 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1446ya-0003dp-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 07 Dec 2000 19:45:08 +0000 Received: from mta07-svc.ntlworld.com ([62.253.162.47]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1446yZ-0003dk-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2000 19:45:07 +0000 Received: from oemcomputer ([213.104.107.32]) by mta07-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001207194444.UHAP16684.mta07-svc.ntlworld.com@oemcomputer> for ; Thu, 7 Dec 2000 19:44:44 +0000 Message-ID: <008601c06086$12b65fc0$206b68d5@oemcomputer> From: "mike.dennison" To: rsgb_lf_group@blacksheep.org References: <000d01c05fb3$3d29ace0$3358883e@default> Subject: LF: Re: 73 khz permits Date: Thu, 7 Dec 2000 19:44:08 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: G3KEV wrote: > the band was extended for a total of 3 years it was still the policy in > spite of the fact that all the existing permits holders that were active > were all south of Birmingham. For genuine experimental purposes this did not > make sense. Surely what was needed was a spread of experimenters covering > the North of England, Scotland and N. Ireland. But according to postings on > the reflector the rsgb did not contemplate any more permits. The decision not to issue any more permits was nothing at all to do with the RSGB. It is ludicrous to suggest that the Society would work to deliberately disadvantage any radio amateur. On the contrary, the decision to start issuing the NoVs again was a direct result of representations by the Society. If you don't believe me, read the RA's Press Release on their web site. Mike, G3XDV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8382 invoked from network); 7 Dec 2000 18:30:05 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 7 Dec 2000 18:30:05 -0000 Received: (qmail 28277 invoked from network); 7 Dec 2000 18:32:14 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 7 Dec 2000 18:32:14 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1445gq-0003KH-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 07 Dec 2000 18:22:44 +0000 Received: from indyweb.cgocable.ca ([205.151.69.200]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1445gp-0003KC-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2000 18:22:43 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from 220-137.lr.cgocable.ca (220-137.lr.cgocable.ca [24.226.220.137]) by indyweb.cgocable.ca (8.9.3 (MessagingDirect 1.0.4)/8.9.3) with SMTP id NAA6366106; Thu, 7 Dec 2000 13:22:28 -0500 (EST) Message-ID: <200012071822.NAA6366106@indyweb.cgocable.ca> X-Sender: bill1@cgocable.ca X-Mailer: Windows Eudora Light Version 1.5.2 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Date: Thu, 07 Dec 2000 13:21:03 -0500 To: "Stewart Nelson" From: "Bill de Carle" Subject: LF: Re: LEK's QRSS-CW signal Cc: rsgb_lf_group@blacksheep.org, lowfer@qth.net Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: At 03:12 PM 12/7/00 +0100, Stewart Nelson wrote: >Hi Bill and all, > >Thanks for the CRUNCHed file. I took a close look at it, to see >how well a machine might decode it. > [..] >Bill, if you have the audio file before CRUNCHing, could you please >post it to your site or email it? I have been playing with some >noise reduction schemes, and would like to attempt an S/N >improvement on this signal. Well, it was a long overnight run so I CRUNCHed on-the-fly to avoid cluttering up my hard disk. I did go back and snip out a bigger piece though, if that's any help to you. The new piece is around 192 Kb long and you can hear LEK's ident 4 or 5 times in it. I put it up on my web page at: http://cafe.rapidus.net/bill1/leklong.zip Bill VE2IQ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26291 invoked from network); 7 Dec 2000 17:26:25 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 7 Dec 2000 17:26:25 -0000 Received: (qmail 25371 invoked from network); 7 Dec 2000 17:21:28 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 7 Dec 2000 17:21:28 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1444NC-0002y6-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 07 Dec 2000 16:58:22 +0000 Received: from public2.thorcom.com ([212.172.148.20] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1444NB-0002y1-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2000 16:58:21 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from indyweb.cgocable.ca ([205.151.69.200]) by public2.thorcom.com with esmtp (Exim 3.02 #1) id 14432K-0003XP-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2000 15:32:45 +0000 Received: from 220-152.lr.cgocable.ca (220-152.lr.cgocable.ca [24.226.220.152]) by indyweb.cgocable.ca (8.9.3 (MessagingDirect 1.0.4)/8.9.3) with SMTP id LAA6315670 for ; Thu, 7 Dec 2000 11:55:37 -0500 (EST) Message-ID: <200012071655.LAA6315670@indyweb.cgocable.ca> X-Sender: bill1@cgocable.ca X-Mailer: Windows Eudora Light Version 1.5.2 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Date: Thu, 07 Dec 2000 11:54:10 -0500 To: rsgb_lf_group@blacksheep.org From: "Bill de Carle" Subject: Re: LF: VE2IQ's .WAV file /73kHz Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: At 01:22 PM 12/7/00 +0000, Jim Moritz wrote: >Dear LF Group, > >Was interested to see Bill's report of the reception of LEK using >slow CW. I played the .WAV file back using spectrogram - I have to >admit I could not make out the CW by ear (it's rather a short >sample), but the signal is clear enough on the spectrogram trace - >it looks like 3s dots, once the compression factor of 40 is taken >into account. > >Something else that is interesting is the noise on the display. If you >look at a night-time spectrogram at my QTH, it is like a crazy tartan >pattern, with vertical streaks every few seconds due to QRN, and >horizontal ones every few Hz due to various signals and Loran. On >VE2IQ's sample, there is nothing in the bandwidth apart from LEK >and what appears to be random noise (although I suppose this >would only correspond to a bandwidth of about 10Hz in real time) - >this is what it sounds like too. Is this an effect of the 'Crunch' >compression process, or does it mean that Bill's QTH is very quiet, >or mine is very noisy? I have lots of noise here! The CRUNCH process does have the effect of "spreading out the spectrum" around the frequency of interest. The basic process I use is to *mix* the signal down to some very low frequency (in this case 800 Hz was mixed down to 20 Hz) - then to *multiply* it back up to 800 Hz. The frequency multiplication process is what makes the desired signal seem to stand out all by itself. For example, if there was an interfering carrier 10 Hz away from LEK's signal, after mixing down it would still be 10 Hz away, but after multiplying back up to 800 Hz it would be 400 Hz away and then gets taken out by the 300 Hz bandpass filter on the output. I could have used a much *narrower* bandpass filter on the output in this particular case because I know Lyle's station is always right on the published frequency, but in general I keep it wide because lowfer beacons are often several Hz off frequency and they risk going outside the passband (after multiplication) if the filter is too narrow. Bill VE2IQ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19238 invoked from network); 7 Dec 2000 14:41:29 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 7 Dec 2000 14:41:29 -0000 Received: (qmail 21587 invoked from network); 7 Dec 2000 14:43:34 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 7 Dec 2000 14:43:34 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1442A3-0002QH-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 07 Dec 2000 14:36:39 +0000 Received: from smtp-out2.bellatlantic.net ([199.45.39.157]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14429v-0002Q7-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2000 14:36:32 +0000 Received: from bellatlantic.net (client-151-200-111-23.bellatlantic.net [151.200.111.23]) by smtp-out2.bellatlantic.net (8.9.1/8.9.1) with ESMTP id JAA02819; Thu, 7 Dec 2000 09:36:14 -0500 (EST) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A2F9FFC.753FBB05@bellatlantic.net> Date: Thu, 07 Dec 2000 09:34:37 -0500 From: "Andre' Kesteloot" X-Mailer: Mozilla 4.7 [en]C-CCK-MCD NSCPCD47 (WinNT; I) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Looking for 2-3 Watt Linear PA for LF References: <2000120614015968199@zetnet.co.uk> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: The LM1875 IC does that without any problem. Maplin even has (had ?) a kit of parts 73 Andre' N4ICK ******************************** Peter Dodd wrote: > Hi Geri > > Does anyone of you have a proven scheme of a small linear PA available, > > that delivers about 2 or 3 Watts from 10 mW, preferably from 18 Volts > > (which is the voltage used by the exciter)? I am sure a small audio > > amplifier would do ... > > I had a similar problem when I wanted to amplify the output of a > signal generator to drive my impedance matching unit. The amplifier > had to be linear to minimise harmonic content. I used a commercial > car stereo amplifier from a local radio junk shop (yes we are lucky > to still have one of these locally). See page 86-88 of 'The Low > Frequency Experimenter's Handbook'. > > -- > Regards, Peter, G3LDO > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27302 invoked from network); 7 Dec 2000 14:41:15 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 7 Dec 2000 14:41:15 -0000 Received: (qmail 16252 invoked from network); 7 Dec 2000 14:36:17 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 7 Dec 2000 14:36:17 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1441zi-0002Mw-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 07 Dec 2000 14:25:58 +0000 Received: from [206.100.10.38] (helo=cobalt4.source.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1441zP-0002Mq-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2000 14:25:57 +0000 Received: from parissn2 (AMontsouris-101-1-4-91.abo.wanadoo.fr [193.253.216.91]) by cobalt4.source.net (8.9.3/8.9.3) with SMTP id GAA11720; Thu, 7 Dec 2000 06:24:48 -0800 Message-ID: <000c01c06059$a08a2de0$0700000a@parissn2> From: "Stewart Nelson" To: rsgb_lf_group@blacksheep.org, lowfer@qth.net References: <200012062125.QAA6027635@indyweb.cgocable.ca> Subject: LF: Re: [Lowfer] LEK's QRSS-CW signal copied in Canada using CRUNCH Date: Thu, 7 Dec 2000 15:12:35 +0100 Organization: SC Group MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2919.6700 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Bill and all, Thanks for the CRUNCHed file. I took a close look at it, to see how well a machine might decode it. First, I found the spectral peak at about 799.875 Hz. This is amazing Tx and Rx frequency accuracy. Dividing by the 40x speedup factor, the error at LF is only three millihertz!!! Demodulating at that frequency, I then searched for the bit timing. I assumed that elements were precisely three seconds long (0.075 after CRUNCH), and just looked for the phase. A CW signal has a discrete spectral line at one half the element rate, because the key is down far more at odd element times than at even. For example, "LEK" is key down for 14 elements; 11 of those are in the odd intervals. So I just shifted a window of alternate elements until the signal was maximum. Using the phase obtained above, a rectangular matched filter was then applied, obtaining this result: http://www.scgroup.com/ham/lek.gif Amplitude is arbitrary linear "voltage" units; phase is in degrees (and not meaningful when the key is up). You can see that "LE" could be easily decoded, but noise towards the end of "K" would result in a bit error, regardless of the threshold chosen. Coherent detection did not help in this case - I suspect that the path caused too much phase jitter. However, a sophisticated program which knew the rules of Morse might be able to correct the error. So, IMO, it will be a while before robot QRSS decoders can compete with the human brain. But, if we all use the same precise element timing, it should be possible to have an automated *detector* of QRSS signals, which could trigger a screen capture or audible alert. Bill, if you have the audio file before CRUNCHing, could you please post it to your site or email it? I have been playing with some noise reduction schemes, and would like to attempt an S/N improvement on this signal. 73, Stewart KK7KA ----- Original Message ----- From: "Bill de Carle" To: ; Sent: Wednesday, December 06, 2000 10:23 PM Subject: [Lowfer] LEK's QRSS-CW signal copied in Canada using CRUNCH > If you go to my web page at: > > http://cafe.rapidus.net/bill1/bbs.htm > > down at the bottom of the page you'll find a link you can use to > download a file called QRSS-LEK.ZIP - it has a few seconds of WAV > file snipped from last night's overnight CRUNCH run trying to hear > lowfer LEK. > > Although I've copied Lyle before using BPSK, I believe this is the first > time I copied him on CW; the signal came through in the wee hours of the > morning, Wednesday Dec. 6th, 2000. I have Lyle's co-ordinates in > Aitkin MN as 46.53013N, 93.71042W and my QTH in St-Adolphe d'Howard, PQ > Canada is at 45.9351N, 74.2993W. Just re-calculated the distance using > Clarke's ellipsoid: it works out to 1495 Km or 929 miles. > > Antenna was a 30 x 20 foot rectangular tuned loop. Rx was a Kenwood > TS850S with external freq standard. Computer was a Compaq laptop > with a 100 Mhz Pentium processor running CRUNCH V3.0. An S16 PCMCIA > soundcard was used for 16-bit audio input. CRUNCH settings were: > 40:1 time compression, 800-Hz CW tone out, 300-Hz bandpass filter on > the output. If you have CoolEdit handy you can do a frequency analysis > of this file (select the entire snippet and press the SCAN button) - > it shows Lyle's signal on 800-Hz jutting up just a little over the > smoothed background noise envelope. > > If you listen carefully you can just hear Lyle's CW ident in there - > starting about halfway through the audio snippet, you'll hear "LEK" > very distinctly. The signal is weak so you may have to play it over > a few times in LOOP mode before you get it, but it's definitely there. > This is a good example of a signal that seems to come up out of the > noise when you listen to it over and over. It's the equivalent of > the "GRAB" process but done in your head. Pretty neat! > > VE2IQ > > To unsubscribe, send to MAJORDOMO@qth.net "unsubscribe lowfer" (Do not > send to list!!) Send on list submissions to lowfer@qth.net > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 415 invoked from network); 7 Dec 2000 14:27:58 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 7 Dec 2000 14:27:58 -0000 Received: (qmail 6011 invoked from network); 7 Dec 2000 14:30:06 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 7 Dec 2000 14:30:06 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1441wU-0002Md-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 07 Dec 2000 14:22:38 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1441wT-0002MY-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2000 14:22:37 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id OAA04040; Thu, 7 Dec 2000 14:22:47 GMT Received: (qmail 24764 invoked from network); 7 Dec 2000 14:21:09 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 7 Dec 2000 14:21:09 -0000 Received: by gauntlet.mail.dera.gov.uk; id OAA14672; Thu, 7 Dec 2000 14:57:03 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma014589; Thu, 7 Dec 00 14:56:42 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Thu, 7 Dec 2000 14:23:26 +0000 Received: by frn-gold-1.dera.gov.uk with Internet Mail Service (5.0.1460.8) id ; Thu, 7 Dec 2000 14:22:01 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D7469@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: Re:amplifiers Date: Thu, 7 Dec 2000 14:21:57 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Peter et al - I guess the main reason for the three transmitter module design of the Decca Txs is to allow a large element of redundancy or soft degradation to be built into the design, in that PA units could fail and still leave the system working at reduced power. I don't really see the advantage of duplicating this concept in an amateur capacity, as we don't mind blowing the occasional device. If modules were to be combined, this would more likely be used as a way to get a lot more power. My main driver for using a 340V rail was the need to not have to have a separate PA. A 50V 25A PSU is fine if you can get one - I have an old telephone exchange PSU - but normally it is a big beast if you have to make one up, so multiple bridged lower voltage PAs is a complex way to go if building from scratch, even if a lot safer. My breadboard PA at 650W with a pair of IRF840s is approaching the limit of what ought to be done with these particular cheap devices - using them at about half of their rated Idmax, in fact I will probably derate to 500W when testing on air, the 650W figure being due to an oversight on my part in forgetting the 4/pi factor before building the breadboard. The use of IRF450s or 460s at this rating has a huge overload margin as they are rated at 15A and only being asked to switch 4A. This is about the same reliability current margin as used in the Decca TXs. The voltage rating at 500V is closer to the 340V rail than the Decca design, (200V rating at 66V rail) but still very comfortably within limits. The catch diodes clamp over-voltage spikes extremally well, in fact I don't see any spikes at all on the breadboard design. Furthermore, the TO3-P or TO247 case of the IRF450 family has slightly better thermal conductivity than the TO3 case - hard to believe, but it is really so ! The 2.5kW PA version proposed reduces the current margin somewhat as switching current is doubled to the 8A region, but provided an eye is kept on device temperature, reliability should be good. The tank circuit provides excelent isolation against load mismatches. As far as I can see, the only potential device destroyer is a low impedance load or short circuit. This can of course be detected very quickly with an RF current monitor, or even a DC current trip. By the look of the network, A detuned antenna will reflect back as an increased load impedance giving an inherent fail safe mechanism. Just started building the big PSU so far, another project for Xmas to get this PA going. May try an on air test at 500W this weekend, look out for a BPSK beacon transmission on 137790 sometime during the daytime Andy G4JNT > -----Original Message----- > From: Peter Dodd [mailto:g3ldo@zetnet.co.uk] > Sent: 2000-12-06 16:12 > To: rsgb_lf_group@blacksheep.org > Subject: LF: Re: Coils and amplifiers > > While on the subject of power amplifiers the only successful design > that I have seen is the one by G3LNP, see 'The LF Experimenter's > Source Book', second edition. > I have seen solid state amplifiers that use many separate amplifiers > with the outputs combined using a ferrite transformer. This might be > the way to go in the construction of a less lethal design. > The Decca transmitters were designed with safety (and > reliability) in mind. > -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16938 invoked from network); 7 Dec 2000 13:42:23 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 7 Dec 2000 13:42:23 -0000 Received: (qmail 2069 invoked from network); 7 Dec 2000 13:37:28 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 7 Dec 2000 13:37:28 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1440xe-00027T-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 07 Dec 2000 13:19:46 +0000 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1440xd-00027O-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2000 13:19:45 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.200.44] (helo=gemini) by hestia.herts.ac.uk with esmtp (Exim 3.16 #4) id 1440v4-0004lW-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2000 13:17:06 +0000 Message-ID: <29778.200012071319@gemini> From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Thu, 7 Dec 2000 13:22:40 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: VE2IQ's .WAV file /73kHz X-Mailer: Pegasus Mail for Win32 (v3.11) Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF Group, Was interested to see Bill's report of the reception of LEK using slow CW. I played the .WAV file back using spectrogram - I have to admit I could not make out the CW by ear (it's rather a short sample), but the signal is clear enough on the spectrogram trace - it looks like 3s dots, once the compression factor of 40 is taken into account. Something else that is interesting is the noise on the display. If you look at a night-time spectrogram at my QTH, it is like a crazy tartan pattern, with vertical streaks every few seconds due to QRN, and horizontal ones every few Hz due to various signals and Loran. On VE2IQ's sample, there is nothing in the bandwidth apart from LEK and what appears to be random noise (although I suppose this would only correspond to a bandwidth of about 10Hz in real time) - this is what it sounds like too. Is this an effect of the 'Crunch' compression process, or does it mean that Bill's QTH is very quiet, or mine is very noisy? On 73kHz, The Rugby TX seems to have spent most of the last two days transmitting a pair of carriers spaced 85Hz, centered on 73.250kHz - perhaps they have problems again. On Tuesday, they shut down on schedule, between about 0800 and 1700. I Hope to be QRV friday evening, and will also try to be on Saturday morning - earlier in the year, the mornings seemed to be better for DX reception on 73k. This week I will be listening for cross band contacts too. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10377 invoked from network); 7 Dec 2000 13:28:00 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 7 Dec 2000 13:28:00 -0000 Received: (qmail 2884 invoked from network); 7 Dec 2000 13:30:06 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 7 Dec 2000 13:30:06 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1440ga-00024F-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 07 Dec 2000 13:02:08 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1440gX-00024A-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2000 13:02:05 +0000 Received: from central.zetnet.co.uk (central.zetnet.co.uk [194.247.47.20]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id NAA24130 for ; Thu, 7 Dec 2000 13:01:58 GMT X-ZSender: g3ldo@zetnet.co.uk Message-ID: <2000120713124568199@zetnet.co.uk> Date: Thu, 7 Dec 2000 13:12:45 GMT To: rsgb_lf_group@blacksheep.org From: "Peter Dodd" X-Mailer: ZIMACS Version 1.20c 10000836 Subject: Re: LF: Real wireless in "Electronics World"!! Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Hi Alan > I have just received my Jan copy of Electronics World ( or Wireless > World as it used to be known) with a article by two Italians on 136MHz. > There are no call-signs given, and a lot of the background about 136 seems > to be somewhat dated, possibly due to publication delays. A little too much > emphasis is given to CCIR type graphs which are proving to have little in > common with amateur style communications.............................. I read the article and I agree with you > Peter may find it worthwhile dropping the journal a letter to update them on the > availability of the new LF Handbook....................... OK, I have sent an e-mail, a copy of which is shown below: ====================================== Hi Jackie, I refer to your article in Electronics World, 'Comms at 136kHz'. We, as a large group radio amateurs, have been experimenting using LF frequencies on the 73kHz band and the 136kHz band since 1997. Your article does not reflect the reality of work being done on these bands and is mainly derived from textbooks - much of which is inappropriate to amateur radio applications. Furthermore, the circuits are far to simplified to be of any practical use; for example it is essential to be able to resonate the antenna loading coil for the transmitter to have any chance of working. There is amateur activity from around 22 countries in Europe (including Italy) and limited activity from Canada and USA and contact has been made with Europe and Canada on the 136kHz band on more than one occasion. None of this activity has been described in your article. Detailed information regarding the LF bands is described in 'The Low Frequency Experimenter's Source Book' available from the Radio Society of Great Britain. Would you like an article on the real world of amateur radio on the low frequency bands? -- Regards, Peter Dodd, G3LDO =================================: From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4205 invoked from network); 7 Dec 2000 00:29:38 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 7 Dec 2000 00:29:38 -0000 Received: (qmail 25048 invoked from network); 7 Dec 2000 00:24:40 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 7 Dec 2000 00:24:40 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143olG-0007mw-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 07 Dec 2000 00:18:10 +0000 Received: from mail6.svr.pol.co.uk ([195.92.193.212]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143olF-0007mr-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2000 00:18:09 +0000 Received: from modem-79.leopard-shark.dialup.pol.co.uk ([62.137.37.207] helo=gateway.twickenham.freeserve.co.uk) by mail6.svr.pol.co.uk with esmtp (Exim 3.13 #0) id 143ol9-0002Eo-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2000 00:18:04 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <4.3.2.7.2.20001207001554.00aa6d60@pop.freeserve.net> X-Sender: twickenham.freeserve.co.uk@pop.freeserve.net X-Mailer: QUALCOMM Windows Eudora Version 4.3.2 Date: Thu, 07 Dec 2000 00:17:24 +0000 To: rsgb_lf_group@blacksheep.org From: "Rob Gill" Subject: Re: LF: Real wireless in "Electronics World"!! In-reply-to: <3A2EC537.12524D2D@mailsrv.dii.unisi.it> References: <000401c05f8e$e8e9b900$d2c37ad5@default> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Electronics World article is by Paolo Antoniazzi and Marco Arecco 73 Rob At 00:01 07/12/00 +0100, you wrote: >Dear Alan i wish to know the names of two Italians that wrote about LF >on "Electronics World"'s pages. >I know all Italian amateurs active on LF and, as i know, nobody wrote >about LF on that magazine. > > >'73 >Valerio From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23518 invoked from network); 6 Dec 2000 23:19:49 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 6 Dec 2000 23:19:49 -0000 Received: (qmail 21116 invoked from network); 6 Dec 2000 23:14:52 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 6 Dec 2000 23:14:52 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143ng6-0007OT-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 23:08:46 +0000 Received: from twingo.tiscalinet.it ([195.130.224.85]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143ng5-0007OL-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 23:08:45 +0000 Received: from tiscalinet.it (62.11.59.215) by twingo.tiscalinet.it; 7 Dec 2000 00:02:15 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A2EC721.F8C11370@tiscalinet.it> Date: Thu, 07 Dec 2000 00:09:21 +0100 From: "Claudio" X-Mailer: Mozilla 4.73 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re: 136 kHz transmission tests References: <001901c05f55$95240ac0$f505e4d5@MarcVidal> <3A2EA8CB.E3903331@tiscalinet.it> <000601c05fcd$f227c180$1834e4d5@MarcVidal> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Well Mark, I noted your receive windows and if possible I put my beacon on the air tose times. 73 Claudio f5maf wrote: > > Ok Claudio I could receive you Friday evening between 20:00 and 21:00 UTC > and saturday and sunday morning between 8:00 and 11:00 UTC > 73 Marc > ---- Original Message ----- > From: "Claudio" > To: > Sent: Wednesday, December 06, 2000 9:59 PM > Subject: Re: LF: Re: 136 kHz transmission tests > > > Hallo Mark, > > I transmit from a second home, I'm never tested internet connectivity > > from there. If I can setup internet I post the time of beacon activity. > > >From there I think to transmit on 7/12 afternoon, 8/12 morning and > > afternoon ad 8-10/12 morning. > > > > 73 de Claudio > > > > f5maf wrote: > > > > > > Hi Claudio, > > > I'll see if I can receive you, > > > Could you tell me when your beacon is on the air (hour UTC)? > > > 73 Marc > > > F5MAF JN03PP > > > > > > ----- Original Message ----- > > > From: "Claudio" > > > To: > > > Sent: Wednesday, December 06, 2000 12:31 AM > > > Subject: LF: 136 kHz transmission tests > > > > > > > Hallo LF group, > > > > > > > > I'm planning to transmit some slow CW beacon from 7 to 10 december. > > > > > > > > My working conditions: QRG 136.375 kHz, Pout about 100W, 30 m wire > > > antenna, > > > > lossy coil :-( > > > > In those day I plan to build a new coil. > > > > > > > > QTH locator is jn45pu 50 km north Milano. > > > > > > > > I'm not shure for internet connectivity from the portable QTH. > > > > Reports are wellcome. > > > > > > > > 73 de Claudio > > > > > > > > ---------------------------------------------------------------------- > > > > Claudio Pozzi http://www.qsl.net/ik2pii happy Linux user > > > > E-Mail: Claudio > > > > Date: 06-Dec-00 Time: 00:19:49 > > > > This message was sent by XFMail > > > > ---------------------------------------------------------------------- > > > > > > > > > > > > -- > > > > Claudio Pozzi http://www.qsl.net/ik2pii happy Linux user > > E-Mail: > > > > ---------------------------------------------------------------------- > > > > > > -- Claudio Pozzi http://www.qsl.net/ik2pii happy Linux user E-Mail: ---------------------------------------------------------------------- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18637 invoked from network); 6 Dec 2000 23:15:16 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 6 Dec 2000 23:15:16 -0000 Received: (qmail 17919 invoked from network); 6 Dec 2000 23:10:20 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 6 Dec 2000 23:10:20 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143nbY-0007Nj-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 23:04:04 +0000 Received: from [212.239.30.36] (helo=mail.jumpy.it) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143nbX-0007NV-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 23:04:03 +0000 Received: from mailsrv.dii.unisi.it (213.213.44.199) by mail.jumpy.it (5.1.050) id 3A2D1C7200011E61 for rsgb_lf_group@blacksheep.org; Thu, 7 Dec 2000 00:01:53 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A2EC537.12524D2D@mailsrv.dii.unisi.it> Date: Thu, 07 Dec 2000 00:01:11 +0100 From: "Valerio" X-Mailer: Mozilla 4.61 [en] (X11; I; Linux 2.2.12-20 i586) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Real wireless in "Electronics World"!! References: <000401c05f8e$e8e9b900$d2c37ad5@default> Content-Type: text/plain; charset=iso-8859-15; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear Alan i wish to know the names of two Italians that wrote about LF on "Electronics World"'s pages. I know all Italian amateurs active on LF and, as i know, nobody wrote about LF on that magazine. '73 Valerio From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11100 invoked from network); 6 Dec 2000 22:58:09 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 6 Dec 2000 22:58:09 -0000 Received: (qmail 12218 invoked from network); 6 Dec 2000 23:00:17 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 6 Dec 2000 23:00:17 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143nQl-0007Ic-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 22:52:55 +0000 Received: from gadolinium.btinternet.com ([194.73.73.111]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143nQk-0007IX-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 22:52:55 +0000 Received: from [213.1.207.10] (helo=default) by gadolinium.btinternet.com with smtp (Exim 3.03 #83) id 143nQa-0002yx-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 22:52:44 +0000 Message-ID: <001501c05fd6$a86b0580$0acf01d5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: CFH may be off Date: Wed, 6 Dec 2000 22:44:05 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all, for CFH watchers......the signal characteristics changed on Tuesday, and the station was just transmitting a subcarrier on the HF sideband (all previous ISB transmissions have used the lower sideband) The signal was available (fortunately) all last night. As the geomagnetic disturbance after-effects die away, the signal has moved into the rapid fading mode. The first few peaks last night were unremarkable but were increasing in level as the night progressed. The last peak at about 0600z was a terrific 46dBu 200uV ) held for over one hour. What a great chance missed. This is the highest level I have recorded and throws weight behind my belief that the best time for a Trans-Atlantic qso would be in the final stages of a disturbed period. This was seen before around the time Peter was first heard on a 40dBu peak. Cheers de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17103 invoked from network); 6 Dec 2000 22:39:02 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 6 Dec 2000 22:39:02 -0000 Received: (qmail 17666 invoked from network); 6 Dec 2000 22:41:08 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 6 Dec 2000 22:41:08 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143n6J-0007Ef-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 22:31:47 +0000 Received: from outbound.charter.net ([24.216.159.200] helo=front002.cluster1.charter.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143n6I-0007Ea-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 22:31:46 +0000 Received: from [24.240.150.77] (HELO les.highnoonfilm.com) by front002.cluster1.charter.net (CommuniGate Pro SMTP 3.3.2) with ESMTP id 30904431; Wed, 06 Dec 2000 17:30:57 -0500 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <5.0.0.25.0.20001206162933.00ae0e58@highnoonfilm.com> X-Sender: les@highnoonfilm.com X-Mailer: QUALCOMM Windows Eudora Version 5.0 Date: Wed, 06 Dec 2000 16:31:15 -0600 To: rsgb_lf_group@blacksheep.org From: "Les Rayburn" Subject: Re: LF: LEK's QRSS-CW signal copied in Canada using CRUNCH Cc: bill1@cgocable.ca, lowfer@qth.net In-reply-to: <200012062125.QAA6027635@indyweb.cgocable.ca> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Just wanted to congratulate Bill and Lyle on last night's success. QRN was fairly high here last night, so I only had more near misses here on Spectran. I may try using CRUNCH tonight. Les Rayburn, N1lF 4919 Cox Cove Helena, AL 35080 XMGR 189.500Khz From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28697 invoked from network); 6 Dec 2000 22:03:03 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 6 Dec 2000 22:03:03 -0000 Received: (qmail 9340 invoked from network); 6 Dec 2000 22:05:48 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 6 Dec 2000 22:05:48 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143mai-00073x-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 21:59:08 +0000 Received: from postfix3.free.fr ([212.27.32.22] ident=postfix) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143mah-00073s-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 21:59:07 +0000 Received: from MarcVidal (toulouse-1-52-24.dial.proxad.net [213.228.52.24]) by postfix3.free.fr (Postfix) with SMTP id 9A8C48772C for ; Wed, 6 Dec 2000 22:45:48 +0100 (CET) Message-ID: <000601c05fcd$f227c180$1834e4d5@MarcVidal> From: "f5maf" To: rsgb_lf_group@blacksheep.org References: <001901c05f55$95240ac0$f505e4d5@MarcVidal> <3A2EA8CB.E3903331@tiscalinet.it> Subject: Re: LF: Re: 136 kHz transmission tests Date: Wed, 6 Dec 2000 22:46:08 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Ok Claudio I could receive you Friday evening between 20:00 and 21:00 UTC and saturday and sunday morning between 8:00 and 11:00 UTC 73 Marc ---- Original Message ----- From: "Claudio" To: Sent: Wednesday, December 06, 2000 9:59 PM Subject: Re: LF: Re: 136 kHz transmission tests > Hallo Mark, > I transmit from a second home, I'm never tested internet connectivity > from there. If I can setup internet I post the time of beacon activity. > >From there I think to transmit on 7/12 afternoon, 8/12 morning and > afternoon ad 8-10/12 morning. > > 73 de Claudio > > f5maf wrote: > > > > Hi Claudio, > > I'll see if I can receive you, > > Could you tell me when your beacon is on the air (hour UTC)? > > 73 Marc > > F5MAF JN03PP > > > > ----- Original Message ----- > > From: "Claudio" > > To: > > Sent: Wednesday, December 06, 2000 12:31 AM > > Subject: LF: 136 kHz transmission tests > > > > > Hallo LF group, > > > > > > I'm planning to transmit some slow CW beacon from 7 to 10 december. > > > > > > My working conditions: QRG 136.375 kHz, Pout about 100W, 30 m wire > > antenna, > > > lossy coil :-( > > > In those day I plan to build a new coil. > > > > > > QTH locator is jn45pu 50 km north Milano. > > > > > > I'm not shure for internet connectivity from the portable QTH. > > > Reports are wellcome. > > > > > > 73 de Claudio > > > > > > ---------------------------------------------------------------------- > > > Claudio Pozzi http://www.qsl.net/ik2pii happy Linux user > > > E-Mail: Claudio > > > Date: 06-Dec-00 Time: 00:19:49 > > > This message was sent by XFMail > > > ---------------------------------------------------------------------- > > > > > > > > -- > > Claudio Pozzi http://www.qsl.net/ik2pii happy Linux user > E-Mail: > > ---------------------------------------------------------------------- > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25417 invoked from network); 6 Dec 2000 21:37:56 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 6 Dec 2000 21:37:56 -0000 Received: (qmail 23127 invoked from network); 6 Dec 2000 21:33:00 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 6 Dec 2000 21:33:00 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143m49-0006wM-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 21:25:29 +0000 Received: from indyweb.cgocable.ca ([205.151.69.200]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143m47-0006wH-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 21:25:28 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from 220-157.lr.cgocable.ca (220-157.lr.cgocable.ca [24.226.220.157]) by indyweb.cgocable.ca (8.9.3 (MessagingDirect 1.0.4)/8.9.3) with SMTP id QAA6027635; Wed, 6 Dec 2000 16:25:20 -0500 (EST) Message-ID: <200012062125.QAA6027635@indyweb.cgocable.ca> X-Sender: bill1@cgocable.ca X-Mailer: Windows Eudora Light Version 1.5.2 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Date: Wed, 06 Dec 2000 16:23:53 -0500 To: rsgb_lf_group@blacksheep.org, lowfer@qth.net From: "Bill de Carle" Subject: LF: LEK's QRSS-CW signal copied in Canada using CRUNCH Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: If you go to my web page at: http://cafe.rapidus.net/bill1/bbs.htm down at the bottom of the page you'll find a link you can use to download a file called QRSS-LEK.ZIP - it has a few seconds of WAV file snipped from last night's overnight CRUNCH run trying to hear lowfer LEK. Although I've copied Lyle before using BPSK, I believe this is the first time I copied him on CW; the signal came through in the wee hours of the morning, Wednesday Dec. 6th, 2000. I have Lyle's co-ordinates in Aitkin MN as 46.53013N, 93.71042W and my QTH in St-Adolphe d'Howard, PQ Canada is at 45.9351N, 74.2993W. Just re-calculated the distance using Clarke's ellipsoid: it works out to 1495 Km or 929 miles. Antenna was a 30 x 20 foot rectangular tuned loop. Rx was a Kenwood TS850S with external freq standard. Computer was a Compaq laptop with a 100 Mhz Pentium processor running CRUNCH V3.0. An S16 PCMCIA soundcard was used for 16-bit audio input. CRUNCH settings were: 40:1 time compression, 800-Hz CW tone out, 300-Hz bandpass filter on the output. If you have CoolEdit handy you can do a frequency analysis of this file (select the entire snippet and press the SCAN button) - it shows Lyle's signal on 800-Hz jutting up just a little over the smoothed background noise envelope. If you listen carefully you can just hear Lyle's CW ident in there - starting about halfway through the audio snippet, you'll hear "LEK" very distinctly. The signal is weak so you may have to play it over a few times in LOOP mode before you get it, but it's definitely there. This is a good example of a signal that seems to come up out of the noise when you listen to it over and over. It's the equivalent of the "GRAB" process but done in your head. Pretty neat! VE2IQ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20414 invoked from network); 6 Dec 2000 21:06:38 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 6 Dec 2000 21:06:38 -0000 Received: (qmail 21919 invoked from network); 6 Dec 2000 21:08:44 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 6 Dec 2000 21:08:44 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143lgR-0006q7-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 21:00:59 +0000 Received: from laguna.tiscalinet.it ([195.130.224.86]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143lgQ-0006q2-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 21:00:58 +0000 Received: from tiscalinet.it (62.11.66.44) by laguna.tiscalinet.it; 6 Dec 2000 21:59:54 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A2EA8CB.E3903331@tiscalinet.it> Date: Wed, 06 Dec 2000 21:59:55 +0100 From: "Claudio" X-Mailer: Mozilla 4.73 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re: 136 kHz transmission tests References: <001901c05f55$95240ac0$f505e4d5@MarcVidal> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hallo Mark, I transmit from a second home, I'm never tested internet connectivity from there. If I can setup internet I post the time of beacon activity. >>From there I think to transmit on 7/12 afternoon, 8/12 morning and afternoon ad 8-10/12 morning. 73 de Claudio f5maf wrote: > > Hi Claudio, > I'll see if I can receive you, > Could you tell me when your beacon is on the air (hour UTC)? > 73 Marc > F5MAF JN03PP > > ----- Original Message ----- > From: "Claudio" > To: > Sent: Wednesday, December 06, 2000 12:31 AM > Subject: LF: 136 kHz transmission tests > > > Hallo LF group, > > > > I'm planning to transmit some slow CW beacon from 7 to 10 december. > > > > My working conditions: QRG 136.375 kHz, Pout about 100W, 30 m wire > antenna, > > lossy coil :-( > > In those day I plan to build a new coil. > > > > QTH locator is jn45pu 50 km north Milano. > > > > I'm not shure for internet connectivity from the portable QTH. > > Reports are wellcome. > > > > 73 de Claudio > > > > ---------------------------------------------------------------------- > > Claudio Pozzi http://www.qsl.net/ik2pii happy Linux user > > E-Mail: Claudio > > Date: 06-Dec-00 Time: 00:19:49 > > This message was sent by XFMail > > ---------------------------------------------------------------------- > > > > -- Claudio Pozzi http://www.qsl.net/ik2pii happy Linux user E-Mail: ---------------------------------------------------------------------- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16686 invoked from network); 6 Dec 2000 20:40:24 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 6 Dec 2000 20:40:24 -0000 Received: (qmail 24631 invoked from network); 6 Dec 2000 20:35:28 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 6 Dec 2000 20:35:28 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143lAz-0006dQ-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 20:28:29 +0000 Received: from mail6.svr.pol.co.uk ([195.92.193.212]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143lAx-0006dL-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 20:28:28 +0000 Received: from modem-200.aluminum.dialup.pol.co.uk ([62.136.12.200] helo=default) by mail6.svr.pol.co.uk with smtp (Exim 3.13 #0) id 143lAs-0001DN-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 20:28:22 +0000 Message-ID: <001601c05fc2$6373c700$c80c883e@default> From: "MAL HAMILTON" To: "rsgb" Subject: LF: keep cool Date: Wed, 6 Dec 2000 20:10:31 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: My experience is to use air cored coils in preference to toroid types if possible for high power applications. If you must use toroids keep them cold by using a good high pressure fan or preferably insert the LPF into a portable refrigerator. (available at Halfords) In LP filter applications running the new big super amplifiers of several k/watts use forced water cooling coils and large home made fibre glass/copper clad board and teflon insulation for the capacitors. This assumes you are using a square wave derived TX with very strong odd order harmonics 3/5/7 th etc. Sheets of copper clad teflon or fibre glass board are available in 8 feet x 4 feet size. de G3KEV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7273 invoked from network); 6 Dec 2000 20:33:11 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 6 Dec 2000 20:33:11 -0000 Received: (qmail 24510 invoked from network); 6 Dec 2000 20:35:19 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 6 Dec 2000 20:35:19 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143lAs-0006d3-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 20:28:22 +0000 Received: from mail6.svr.pol.co.uk ([195.92.193.212]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143lAq-0006cy-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 20:28:21 +0000 Received: from modem-200.aluminum.dialup.pol.co.uk ([62.136.12.200] helo=default) by mail6.svr.pol.co.uk with smtp (Exim 3.13 #0) id 143lAk-0001DN-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 20:28:15 +0000 Message-ID: <001201c05fc2$5eef2940$c80c883e@default> From: "MAL HAMILTON" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Re: LF keep cool Date: Wed, 6 Dec 2000 18:47:04 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: -----Original Message----- From: Talbot Andrew To: 'rsgb_lf_group@blacksheep.org' Date: 06 December 2000 12:39 Subject: LF: Re: LF keep cool >Some of us don't have such large antennas as you, Peter. For 1 Watt ERP >I would need approx 4kW RF. >Anyone got any cheap 3 phase 500V bridge rectifiers ? > >The Litz wire around surplus now will do a better job at keeping cool >than copper tube at these frequencies. Not as good as 25mm water cooled but the pump pressure must be adequate, otherwise at the 3 - 5 kw power you will get MELTDOWN. > >Andy G4JNT > >> With a transmitter running 900watts I can get 1watt erp even with my >> 'bit of wet string' so there is no need to run more power. To get >> 1watt erp I have to obtain 4.5amps antenna current with my antenna. >> The coil is wound with 1.5mm Litz wire (2.5mm including plastic >> insulation) with an RF resistance of approximately 5ohms and will >> dissipate around 100 watts during key-down periods. > > >-- >The Information contained in this E-Mail and any subsequent correspondence >is private and is intended solely for the intended recipient(s). >For those other than the recipient any disclosure, copying, distribution, >or any action taken or omitted to be taken in reliance on such information is >prohibited and may be unlawful. > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7004 invoked from network); 6 Dec 2000 20:32:57 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 6 Dec 2000 20:32:57 -0000 Received: (qmail 1581 invoked from network); 6 Dec 2000 20:35:03 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 6 Dec 2000 20:35:03 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143lAu-0006dC-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 20:28:24 +0000 Received: from mail6.svr.pol.co.uk ([195.92.193.212]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143lAs-0006d5-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 20:28:22 +0000 Received: from modem-200.aluminum.dialup.pol.co.uk ([62.136.12.200] helo=default) by mail6.svr.pol.co.uk with smtp (Exim 3.13 #0) id 143lAm-0001DN-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 20:28:17 +0000 Message-ID: <001301c05fc2$6015a7e0$c80c883e@default> From: "MAL HAMILTON" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Re: Coils and amplifiers Date: Wed, 6 Dec 2000 19:00:10 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: -----Original Message----- From: Peter Dodd To: rsgb_lf_group@blacksheep.org Date: 06 December 2000 16:09 Subject: LF: Re: Coils and amplifiers >Andy said: > >> Some of us don't have such large antennas as you, Peter. For 1 Watt ERP >> I would need approx 4kW RF. > >Yes, I am well aware of that - and that is why I mentioned I5TGC's LF >antenna, which must be the smallest of the LF antennas in the LF group. >However, the subject was loading coil cooling - and was it necessary. >I only quoted my transmitter power and antenna current because that >was the only experience I had of using higher power at LF > >While on the subject of power amplifiers the only successful design >that I have seen is the one by G3LNP, see 'The LF Experimenter's >Source Book', second edition. You must have missed MM0ALM signal. He is the strongest on the band and uses a tube amplifier designed and built by himself. He is several S points above anyone else. Considering he has no connection with electronics as a profession he could show most others the way. Seem to remember EI0CF with his home designed/built amplifier being the strongest on the band also. Surprised you missed hearing these two stations. Too many early nights or day time doozing off !!!!!!!!!!!!!!!!!!!! G3KEV >I have seen solid state amplifiers that use many separate amplifiers >with the outputs combined using a ferrite transformer. This might be >the way to go in the construction of a less lethal design. >The Decca transmitters were designed with safety (and reliability) in mind. > > > > >-- >Regards, Peter, G3LDO > > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5576 invoked from network); 6 Dec 2000 20:32:32 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 6 Dec 2000 20:32:32 -0000 Received: (qmail 1687 invoked from network); 6 Dec 2000 20:35:14 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 6 Dec 2000 20:35:14 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143lAw-0006dJ-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 20:28:26 +0000 Received: from mail6.svr.pol.co.uk ([195.92.193.212]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143lAu-0006dD-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 20:28:24 +0000 Received: from modem-200.aluminum.dialup.pol.co.uk ([62.136.12.200] helo=default) by mail6.svr.pol.co.uk with smtp (Exim 3.13 #0) id 143lAo-0001DN-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 20:28:19 +0000 Message-ID: <001401c05fc2$6120af40$c80c883e@default> From: "MAL HAMILTON" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Real wireless in "Electronics World"!! Date: Wed, 6 Dec 2000 19:12:05 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: -----Original Message----- From: Alan Melia To: rsgb_lf_group@blacksheep.org Date: 06 December 2000 14:35 Subject: LF: Real wireless in "Electronics World"!! >Hi All, I have just received my Jan copy of Electronics World ( or Wireless >World as it used to be known) with a article by two Italians on 136MHz. >There are no call-signs given, and a lot of the background about 136 seems >to be somewhat dated, possibly due to publication delays. Sounds like the LF source book of a couple of years ago. Most of the information was obsolete and bore no resemblence to the achievements taking place when it was published. I think 23 km was the record when in fact I had worked OH1TN and got 579 on normal morse when it went to print. G3KEV A little too much >emphasis is given to CCIR type graphs which are proving to have little in >common with amateur style communications. "Better equiped station achieve >several hundred kms in daytime and 1000 to 2000 at night" would seem to be >about 2 years out of date. 'Skywave' is a regular feature of daytime qsos >(not just night-time as they infer) and I have heard Valerio, Raino, >Christer and Petr often in daytime as, I am sure, have you all. In fact a >week ago Mike in Pembroke was working Raino at good strength when I was >struggling a little....a good indication of daytime ionospheric propagation. >Concentration seems to be on low power transmitters. > >Having said that there is a lot of interesting practical detail on coils and >aerials including loops. It could act as a 'recruiting poster' for amateurs >who have not yet been exposed to the joys of LF. Surprisingly it does not >mention this reflector, though Geri web site gets a mention. Peter may find >it worthwhile dropping the journal a letter to update them on the >availablity of the new LF Handbook. Spectrogram 5 is mentioned in passing >but no mention of Robert or his web site. The is also no mention of their >home grown Spectran software from Alberto. > >Cheers de Alan G3NYK >Alan.Melia@btinternet.com > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27310 invoked from network); 6 Dec 2000 19:15:57 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 6 Dec 2000 19:15:57 -0000 Received: (qmail 15615 invoked from network); 6 Dec 2000 19:18:38 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 6 Dec 2000 19:18:38 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143jtE-0006Js-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 19:06:04 +0000 Received: from email.cwcom.net ([195.44.0.104] helo=cwcom.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143jtD-0006Jn-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 19:06:03 +0000 Received: from computer ([195.44.203.78]) by cwcom.net with Microsoft SMTPSVC(5.5.1877.537.53); Wed, 6 Dec 2000 19:04:18 +0000 Message-ID: <000b01c05fba$3dbe2080$4ecb2cc3@computer> From: "Martin M5CIX" To: rsgb_lf_group@blacksheep.org References: <21206.200012061423@gemini> Subject: LF: Re: High Power, Antennas, Loading Coils and blowing ourselves up! Date: Wed, 6 Dec 2000 19:24:29 -0000 Organization: M5CIX / G8CIX MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Reading the current series of postings on power and Antennas with insulators catching fire makes it clear that we are talking about lethal power levels. What are the safety issues and how should we protect ourselves, kids and neighbours? Recent emails talk of direct rectification of mains and three phase supplies! Its all getting very hairy. Martin M5CIX > Another factor to be considered is the antenna voltage. With about > 6A antenna current, and 300pF capacitance, the antenna voltage > should be about 23kV. When I first started operating at this level of > power, I had problems with arcs forming on the antenna wire, > insulators catching fire, etc. Changing to a thicker antenna wire, > and fitting "corona rings" to the insulators, with the object of > reducing the potential gradient, seems to have solved the problem > for the time being. > > Operating with a higher power level still has it's attractions - at the > moment, to get something like 1W ERP, I have to resort to using a > hydraulic cherry picker to support my antenna at 16m high - but I > can only do this during the night, in order to preserve relations with > the neighbors. With the antenna at it's daytime height, I reckon 2- > 4kW would be required. But the antenna voltage would then be > between 30 and 50kV. 73kHz doesn't bear thinking about! > > So there is a dilemma - building a huge amplifier as Andy describes > would require a bigger antenna with a lower reactance to keep the > voltage to a sensible level, but having a bigger antenna would > means less power is required (lower loss and higher radiation > resistance). Trying to increase the size of my antenna is > problematic for the usual reasons, so I suppose I am near the limit > of what ERP is possible from my QTH, for the time being. > > Cheers, Jim Moritz > 73 de M0BMU > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9897 invoked from network); 6 Dec 2000 18:58:10 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 6 Dec 2000 18:58:10 -0000 Received: (qmail 27233 invoked from network); 6 Dec 2000 18:53:11 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 6 Dec 2000 18:53:11 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143jU0-0006A8-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 18:40:00 +0000 Received: from mail3.svr.pol.co.uk ([195.92.193.19]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143jTy-0006A0-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 18:39:59 +0000 Received: from modem-51.depacon.dialup.pol.co.uk ([62.136.88.51] helo=default) by mail3.svr.pol.co.uk with smtp (Exim 3.13 #0) id 143jTV-0005Bk-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 18:39:29 +0000 Message-ID: <000b01c05fb3$3b014ea0$3358883e@default> From: "MAL HAMILTON" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re: 73kHz Activity Tonight Date: Wed, 6 Dec 2000 11:26:52 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: -----Original Message----- From: Rik Strobbe To: rsgb_lf_group@blacksheep.org Date: 05 December 2000 23:15 Subject: Re: LF: Re: 73kHz Activity Tonight >Hello group, > >I saw Jim (M0BMU) with a solid 'O' beaconing on 71.65kHz friday night. I >could heard the signal going on and off, but QRM/QRN was to bad for a >normal CW copy. > >John (G4CNN) seemes to have improved his station, while I had some >difficulties in reading him during our QSO a few days ago he was a solid >'O' and would have been a 329 in CW during his QSO with PA0BWL. > >On sunday morning F5MAF was a good 'O' copy, until there started a never >ending QSO straight on top of Marc (the QSO included exchange of output >power). Both stations were clearly audible with me (one 559 and the other >even a lot stronger) and based on their locations they should have heard >each other at least at the same strength. >I know that the therapeutic value of QRSS is highly appreciated by some, >but should QRSS not in the first place be a mode one uses to work stations >that cannot be worked on faster modes (CW) ? >Nothing against these long and strong signal QRSS QSOs, but to avoid that >ones therapy becomes anothers frustration it might be usefull to keep the >137700-137800Hz segment for real weak signal contacts (keeping QSOs short) >and have a ragshew or therapeutic segment arround 137600Hz. > >73, Rik ON7YD Agree Rik. qrss should only be used when normal cw fails. So far any qrss signals that I have observed at this qth were strong enough to be copied on normal cw. That includes both 136 and 73 khz bands. I am equipped for qrss send/receive but do not use it because I have not found it necessary so far. Who wants to make a qso that lasts for maybe 30 - 40 minutes or longer on qrss when using normal cw it would take 2 - 3 minutes. Qrss should be used sparingly and only when absolutely necessary. 73 de G3KEV > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22771 invoked from network); 6 Dec 2000 18:50:56 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 6 Dec 2000 18:50:56 -0000 Received: (qmail 28121 invoked from network); 6 Dec 2000 18:53:05 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 6 Dec 2000 18:53:05 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143jU1-0006AU-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 18:40:01 +0000 Received: from mail3.svr.pol.co.uk ([195.92.193.19]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143jTz-0006A5-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 18:40:00 +0000 Received: from modem-51.depacon.dialup.pol.co.uk ([62.136.88.51] helo=default) by mail3.svr.pol.co.uk with smtp (Exim 3.13 #0) id 143jTX-0005Bk-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 18:39:31 +0000 Message-ID: <000c01c05fb3$3c157dc0$3358883e@default> From: "MAL HAMILTON" To: "rsgb" Subject: LF: amp topology Date: Wed, 6 Dec 2000 12:05:53 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Andy and All. Your approach to big amp design using a bridge cct is interesting but the concept is old hat. Like you say it is based on the decca design except for the supply voltage which you derive directly from the mains 230 v supply. The rectified 230v and capaciator smoothing could be dangerous but no more dangerous for us that have built hf amplifiers using tubes with 3 to 4 kv on the anodes at currents in access of 1 amp. I agree not for those with hand wobble or sticky fingers. However since you are at the launching stage with such an amplifier and have worked out some of the critical component values and impedences I though you might like to give others the benefit of your knowledge. IT AVOIDS RE INVENTING THE WHEEL I would like to hear your signal using this amplifier and dont forget to WATER COOL THE LOADING COIL. Put a disclaimer on any cct diagrams that you produce that you will not be responsible for any EARLY EXPIRY of those building and using such an amplifier!!!!!!!!!! 73 de G3KEV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21005 invoked from network); 6 Dec 2000 18:50:26 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 6 Dec 2000 18:50:26 -0000 Received: (qmail 27208 invoked from network); 6 Dec 2000 18:53:08 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 6 Dec 2000 18:53:08 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143jU3-0006Ag-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 18:40:03 +0000 Received: from mail3.svr.pol.co.uk ([195.92.193.19]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143jU1-0006Ab-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 18:40:01 +0000 Received: from modem-51.depacon.dialup.pol.co.uk ([62.136.88.51] helo=default) by mail3.svr.pol.co.uk with smtp (Exim 3.13 #0) id 143jTY-0005Bk-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 18:39:33 +0000 Message-ID: <000d01c05fb3$3d29ace0$3358883e@default> From: "MAL HAMILTON" To: "rsgb" Subject: LF: 73 khz permits Date: Wed, 6 Dec 2000 12:47:40 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: When 73 khz first became available to UK radio amateurs ANYONE that wanted permission to operate on the band got it. I know some that got it just in case, but never used the band. In more recent times just before the band was due to be withdrawn there was a policy according to the rsgb that no more permits would be issued. When the band was extended another year that was still the policy and then when the band was extended for a total of 3 years it was still the policy in spite of the fact that all the existing permits holders that were active were all south of Birmingham. For genuine experimental purposes this did not make sense. Surely what was needed was a spread of experimenters covering the North of England, Scotland and N. Ireland. But according to postings on the reflector the rsgb did not contemplate any more permits. Then suddenly the closed shop opened up and permits are again being issued to any class A or A/B that wants to experiment on the band. Permits are now being issued directly by the RA and no agencies are involved. This is now a fair system. I did enquire some months back directly to the RA about 73 khz permits and understood from the conversation that once they had decided on the extension period for the band an application to them would be favourably considered. I got my permit on the 30th Nov. and hope to be active as soon as I get the TX built. I also understand several others have applied for permits across the UK, giving a better distribution of activity for experimental purpose than before. For those in Europe interested in LF an approach to your Licence department for a 73 khz permit might be successful. 73 de Mal/G3KEV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20887 invoked from network); 6 Dec 2000 18:50:19 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 6 Dec 2000 18:50:19 -0000 Received: (qmail 27149 invoked from network); 6 Dec 2000 18:53:01 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 6 Dec 2000 18:53:01 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143jU5-0006An-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 18:40:05 +0000 Received: from mail3.svr.pol.co.uk ([195.92.193.19]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143jU4-0006Ai-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 18:40:04 +0000 Received: from modem-51.depacon.dialup.pol.co.uk ([62.136.88.51] helo=default) by mail3.svr.pol.co.uk with smtp (Exim 3.13 #0) id 143jTb-0005Bk-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 18:39:36 +0000 Message-ID: <000e01c05fb3$3ecd4ac0$3358883e@default> From: "MAL HAMILTON" To: "rsgb" Subject: LF: 500 khz Date: Wed, 6 Dec 2000 17:19:56 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi All. I have made the point before on the reflector that 500 khz band is still in use by the marine services. The band seems to be very busy at times. I have recently heard traffic lists from Costal Stations and ships operating on the band. This activity is mostly Middle East and Far East lines. These lists sometimes are quite long indicating that the band is far from obsolete. There is virtually no European activity but I have been on a few ships in recent times and the HF equipment is still installed and tested periodically. A lot of Radio Officers have re-trained for other Electronic maintainence jobs plus radar but are still competent cw operators on ships equipped for HF and MF plus Satellite. The bulk of marine traffic is now via satellite but 500 khz band is still retained for marine use and will be for some time possibly years. To prove the above observations listen on the band and find out what is going on for yourself. You must be able to read morse at 20 wpm upwards. You would wonder how they manage without qrss!!!!!!!!!!!!!!!!!!! It would be great to get a slot on the band for ham radio but it looks like we will have to wait a long time. Do not believe everything that you hear via the media it is usually part fact and part fiction. G3KEV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7724 invoked from network); 6 Dec 2000 16:04:24 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 6 Dec 2000 16:04:24 -0000 Received: (qmail 1287 invoked from network); 6 Dec 2000 16:07:06 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 6 Dec 2000 16:07:06 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143gyY-0005Vm-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 15:59:22 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143gyV-0005Vh-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 15:59:19 +0000 Received: from central.zetnet.co.uk (central.zetnet.co.uk [194.247.47.20]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id PAA31057 for ; Wed, 6 Dec 2000 15:59:13 GMT X-ZSender: g3ldo@zetnet.co.uk Message-ID: <2000120616113268199@zetnet.co.uk> Date: Wed, 6 Dec 2000 16:11:32 GMT To: rsgb_lf_group@blacksheep.org From: "Peter Dodd" X-Mailer: ZIMACS Version 1.20c 10000836 Subject: LF: Re: Coils and amplifiers Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Andy said: > Some of us don't have such large antennas as you, Peter. For 1 Watt ERP > I would need approx 4kW RF. Yes, I am well aware of that - and that is why I mentioned I5TGC's LF antenna, which must be the smallest of the LF antennas in the LF group. However, the subject was loading coil cooling - and was it necessary. I only quoted my transmitter power and antenna current because that was the only experience I had of using higher power at LF While on the subject of power amplifiers the only successful design that I have seen is the one by G3LNP, see 'The LF Experimenter's Source Book', second edition. I have seen solid state amplifiers that use many separate amplifiers with the outputs combined using a ferrite transformer. This might be the way to go in the construction of a less lethal design. The Decca transmitters were designed with safety (and reliability) in mind. -- Regards, Peter, G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24098 invoked from network); 6 Dec 2000 14:31:55 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 6 Dec 2000 14:31:55 -0000 Received: (qmail 11830 invoked from network); 6 Dec 2000 14:34:04 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 6 Dec 2000 14:34:04 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143fU3-000574-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 14:23:47 +0000 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143fU2-00056y-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 14:23:46 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.200.44] (helo=gemini) by hestia.herts.ac.uk with esmtp (Exim 3.16 #4) id 143fRY-0004Qq-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 14:21:12 +0000 Message-ID: <21206.200012061423@gemini> From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Wed, 6 Dec 2000 14:26:44 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: High Power, Antennas and Loading Coils X-Mailer: Pegasus Mail for Win32 (v3.11) Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF Group, Trying to run high power into a small antenna puts a lot of strain on the loading coil and the antenna itself. For instance, my antenna has loss resistance of about 30ohms. My original, small, loading coil had a loss resistance of about 20ohms. My new loading coil, made from salvaged Decca loading coil litz, has a loss resistance of about 5ohms. The old loading coil sounds like it would lose a lot of signal, but in fact the difference only works out to around 1.5dB - probably why many people have concluded that huge loading coils don't make a worthwhile difference. But the difference in power dissipation is more significant - with 1.2kW TX output, the big coil dissipates about 180W, as against 500W for the small coil, which would probably lead to it's rapid demise. Another factor to be considered is the antenna voltage. With about 6A antenna current, and 300pF capacitance, the antenna voltage should be about 23kV. When I first started operating at this level of power, I had problems with arcs forming on the antenna wire, insulators catching fire, etc. Changing to a thicker antenna wire, and fitting "corona rings" to the insulators, with the object of reducing the potential gradient, seems to have solved the problem for the time being. Operating with a higher power level still has it's attractions - at the moment, to get something like 1W ERP, I have to resort to using a hydraulic cherry picker to support my antenna at 16m high - but I can only do this during the night, in order to preserve relations with the neighbors. With the antenna at it's daytime height, I reckon 2- 4kW would be required. But the antenna voltage would then be between 30 and 50kV. 73kHz doesn't bear thinking about! So there is a dilemma - building a huge amplifier as Andy describes would require a bigger antenna with a lower reactance to keep the voltage to a sensible level, but having a bigger antenna would means less power is required (lower loss and higher radiation resistance). Trying to increase the size of my antenna is problematic for the usual reasons, so I suppose I am near the limit of what ERP is possible from my QTH, for the time being. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29662 invoked from network); 6 Dec 2000 14:30:19 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 6 Dec 2000 14:30:19 -0000 Received: (qmail 20049 invoked from network); 6 Dec 2000 14:33:01 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 6 Dec 2000 14:33:01 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143fPs-00056E-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 14:19:28 +0000 Received: from tungsten.btinternet.com ([194.73.73.81]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143fPp-000569-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 14:19:25 +0000 Received: from [213.122.195.210] (helo=default) by tungsten.btinternet.com with smtp (Exim 3.03 #83) id 143fPj-00010Y-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 14:19:20 +0000 Message-ID: <000401c05f8e$e8e9b900$d2c37ad5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: Real wireless in "Electronics World"!! Date: Wed, 6 Dec 2000 14:09:36 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi All, I have just received my Jan copy of Electronics World ( or Wireless World as it used to be known) with a article by two Italians on 136MHz. There are no call-signs given, and a lot of the background about 136 seems to be somewhat dated, possibly due to publication delays. A little too much emphasis is given to CCIR type graphs which are proving to have little in common with amateur style communications. "Better equiped station achieve several hundred kms in daytime and 1000 to 2000 at night" would seem to be about 2 years out of date. 'Skywave' is a regular feature of daytime qsos (not just night-time as they infer) and I have heard Valerio, Raino, Christer and Petr often in daytime as, I am sure, have you all. In fact a week ago Mike in Pembroke was working Raino at good strength when I was struggling a little....a good indication of daytime ionospheric propagation. Concentration seems to be on low power transmitters. Having said that there is a lot of interesting practical detail on coils and aerials including loops. It could act as a 'recruiting poster' for amateurs who have not yet been exposed to the joys of LF. Surprisingly it does not mention this reflector, though Geri web site gets a mention. Peter may find it worthwhile dropping the journal a letter to update them on the availablity of the new LF Handbook. Spectrogram 5 is mentioned in passing but no mention of Robert or his web site. The is also no mention of their home grown Spectran software from Alberto. Cheers de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29700 invoked from network); 6 Dec 2000 14:14:02 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 6 Dec 2000 14:14:02 -0000 Received: (qmail 1813 invoked from network); 6 Dec 2000 14:09:05 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 6 Dec 2000 14:09:05 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143exc-0004vl-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 13:50:16 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143exZ-0004vg-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 13:50:13 +0000 Received: from central.zetnet.co.uk (central.zetnet.co.uk [194.247.47.20]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id NAA32129 for ; Wed, 6 Dec 2000 13:50:07 GMT X-ZSender: g3ldo@zetnet.co.uk Message-ID: <2000120614015968199@zetnet.co.uk> Date: Wed, 6 Dec 2000 14:01:59 GMT To: rsgb_lf_group@blacksheep.org From: "Peter Dodd" X-Mailer: ZIMACS Version 1.20c 10000836 Subject: Re: LF: Looking for 2-3 Watt Linear PA for LF Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Hi Geri > Does anyone of you have a proven scheme of a small linear PA available, > that delivers about 2 or 3 Watts from 10 mW, preferably from 18 Volts > (which is the voltage used by the exciter)? I am sure a small audio > amplifier would do ... I had a similar problem when I wanted to amplify the output of a signal generator to drive my impedance matching unit. The amplifier had to be linear to minimise harmonic content. I used a commercial car stereo amplifier from a local radio junk shop (yes we are lucky to still have one of these locally). See page 86-88 of 'The Low Frequency Experimenter's Handbook'. -- Regards, Peter, G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20147 invoked from network); 6 Dec 2000 12:34:54 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 6 Dec 2000 12:34:54 -0000 Received: (qmail 23039 invoked from network); 6 Dec 2000 12:36:58 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 6 Dec 2000 12:36:58 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143dbq-0004Zp-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 12:23:42 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143dbl-0004Zj-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 12:23:38 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id MAA10255; Wed, 6 Dec 2000 12:23:47 GMT Received: (qmail 12994 invoked from network); 6 Dec 2000 12:22:13 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 6 Dec 2000 12:22:13 -0000 Received: by gauntlet.mail.dera.gov.uk; id MAA20873; Wed, 6 Dec 2000 12:58:13 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma020673; Wed, 6 Dec 00 12:57:22 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Wed, 6 Dec 2000 12:23:59 +0000 Received: by frn-gold-1.dera.gov.uk with Internet Mail Service (5.0.1460.8) id ; Wed, 6 Dec 2000 12:22:38 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D7463@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: LF keep cool Date: Wed, 6 Dec 2000 12:22:37 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Some of us don't have such large antennas as you, Peter. For 1 Watt ERP I would need approx 4kW RF. Anyone got any cheap 3 phase 500V bridge rectifiers ? The Litz wire around surplus now will do a better job at keeping cool than copper tube at these frequencies. Andy G4JNT > With a transmitter running 900watts I can get 1watt erp even with my > 'bit of wet string' so there is no need to run more power. To get > 1watt erp I have to obtain 4.5amps antenna current with my antenna. > The coil is wound with 1.5mm Litz wire (2.5mm including plastic > insulation) with an RF resistance of approximately 5ohms and will > dissipate around 100 watts during key-down periods. -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17974 invoked from network); 6 Dec 2000 12:33:15 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 6 Dec 2000 12:33:15 -0000 Received: (qmail 20665 invoked from network); 6 Dec 2000 12:35:20 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 6 Dec 2000 12:35:20 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143dbr-0004Zv-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 12:23:43 +0000 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143dbp-0004Zo-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 12:23:41 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id MAA04077; Wed, 6 Dec 2000 12:23:52 GMT Received: (qmail 13019 invoked from network); 6 Dec 2000 12:22:18 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 6 Dec 2000 12:22:18 -0000 Received: by gauntlet.mail.dera.gov.uk; id MAA20913; Wed, 6 Dec 2000 12:58:17 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma020829; Wed, 6 Dec 00 12:57:44 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id ; Wed, 6 Dec 2000 12:24:19 +0000 Received: by frn-gold-1.dera.gov.uk with Internet Mail Service (5.0.1460.8) id ; Wed, 6 Dec 2000 12:22:58 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D7464@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Cc: g4jnt@thersgb.net Subject: LF: RE: Amplifier Topology Date: Wed, 6 Dec 2000 12:22:57 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/html; charset=windows-1252 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Hello all -
 
Mal and others have been asking for details of the high power amplifier I described earlier.  At the moment only the QRP 650W version has been tested and the 2-3kW design concept was a best otline estimate based on my tests of that breadboard.
 
As this sort of design is not for the faint hearted I am not just going to give out circuits that anyone could try building from (at this stage anyway).  Just think of the damage 5000uF of capacitors charged to 340V would do if shorted.  That is nearly 300 joules of energy, equivalent to dropping a 5kg sledge hammer from the 6m second floor of a building.  I blew 4 IRF840s on the breadboard due to various (now obvious) reasons, and each time they went short with an almighty band that set ears singing and me into a state of shock !  This design has 5 times that stored energy.
 
The outline concept given is enough to get experienced constructors going.  If you need more info than that, then you're not ready to be building such a beast !!!!!
 
Here's the outline again :
 
Drive stages, 2.Fc input, divide by two, BPSK phase modulator or other on-off gating, HP4426/7 driver chip. NO RAMPING OF DRIVE TO TRY TO AVOID CLICKS, don't even attempt it.   Could try using the invert/non invert HP4428 driving the drive transformer in push-pull (double the primary turns) - gives more power to drive 4 FET devices together.
 
4 x IRF450 or IRF460 in full - bridge driven as per the Decca transmitter output stages with BYV29-500 catch diodes.  Current spike soak, 1-2uH CT choke on each pair of devices, damped with 20 ohms   Look at hte LF experimenters manual for the Decca Tx design.
 
Tank circuit Ql = 6, caps rated at 3kV, use series parallel to take the current / voltage.  Inductor wound with Litz wire - use Rayners formula to estimate the turns needed and measure from there.
 
Impedances and transformer taps calculated as per standard techniques 
Vcc = Vpeak.  Vsine peak = Vsq peak * 4/pi.   Pout = Vcc^2 / 2.Rl
 
PSU  Mains - 20A bridge rectifier, 5000uF capacitor(s)  output 340V DC, (obviously with soft start and surge limiting). 
Plenty of input filtering, lots of PSU rail decoupling at wide frequency band - all the usual etcs. of PA design
 
One of my aims over the Winter Solstice enforced holiday season is to build up a website where circuits and software can be placed.  However, don't hold your breath, building more interesting RF projects and software will probably get in the way, so  probably won't happen :-(
 
Andy  G4JNT
 


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The Information contained in this E-Mail and any subsequent correspondence
is private and is intended solely for the intended recipient(s).
For those other than the recipient any disclosure, copying, distribution,
or any action taken or omitted to be taken in reliance on such information is
prohibited and may be unlawful.
 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15494 invoked from network); 6 Dec 2000 10:26:05 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 6 Dec 2000 10:26:05 -0000 Received: (qmail 5422 invoked from network); 6 Dec 2000 10:21:08 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 6 Dec 2000 10:21:08 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143bSg-00043R-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 10:06:06 +0000 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143bSb-00043L-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 10:06:01 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id KAA06165; Wed, 6 Dec 2000 10:06:00 GMT Received: (qmail 29367 invoked from network); 6 Dec 2000 10:04:27 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 6 Dec 2000 10:04:27 -0000 Received: by gauntlet.mail.dera.gov.uk; id KAA18749; Wed, 6 Dec 2000 10:40:26 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma018718; Wed, 6 Dec 00 10:39:55 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id ; Wed, 6 Dec 2000 10:06:26 +0000 Received: by frn-gold-1.dera.gov.uk with Internet Mail Service (5.0.1460.8) id ; Wed, 6 Dec 2000 10:05:05 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D745D@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Cc: g4jnt@thersgb.net Subject: LF: Amplifier Topology Date: Wed, 6 Dec 2000 10:05:04 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/html; charset=windows-1252 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Hello all -
 
Mal and others have been asking for details of the high power amplifier I described earlier.  At the moment only the QRP 650W version has been tested and the 2-3kW design concept was a best otline estimate based on my tests of that breadboard.
 
As this sort of design is not for the faint hearted I am not just going to give out circuits that anyone could try building from (at this stage anyway).  Just think of the damage 5000uF of capacitors charged to 340V would do if shorted.  That is nearly 300 joules of energy, equivalent to dropping a 5kg sledge hammer from the 6m second floor of a building.  I blew 4 IRF840s on the breadboard due to various (now obvious) reasons, and each time they went short with an almighty band that set ears singing and me into a state of shock !  This design has 5 times that stored energy.
 
The outline concept given is enough to get experienced constructors going.  If you need more info than that, then you're not ready to be building such a beast! !!!!
 
Here's the outline again :
 
Drive stages, 2.Fc input, divide by two, BPSK phase modulator or other on-off gating, HP4426/7 driver chip. NO RAMPING OF DRIVE TO TRY TO AVOID CLICKS, don't even attempti t.   Could try using the invert/non invert HP4428 driving the drive transformer in push-pull (double the primary turns) - gives more power to drive 4 FET devices together.
 
4 x IRF450 or IRF460 in full - bridge driven as per the Decca transmitter output stages with BYV29-500 catch diodes.  Current spike soak, 1-2uH CT choke on each pair of devices, damped with 20 ohms   Look at hte LF experimenters manual for the Decca Tx design.
 
Tank circuit Ql = 6, caps rated at 3kV, use series parallel to take the current / voltage. I nductor wound with Litz wire - use Rayners formula to estimate the turns needed and measure from there.
 
Impedances and transformer taps calculated as per standard techniques 
Vcc = Vpeak.  Vsine peak = Vsq peak * 4/pi.   Pout = Vcc^2 / 2.Rl
 
PSU  Mains - 20A bridge rectifier, 5000uF capacitor(s)  output 340V DC, (obviously with soft start and surge limiting). 
Plenty of input filtering, lots of PSU rail decoupling at wide frequency band - all the usual etcs. of PA design
 
One of my aims over the Winter Solstice enforced holiday season is to build up a website wherec ircuits and software can be placed.  However, don't hold your breath,b uilding more interesting RF projects and software will probably get in the way, so  probably won't happen :-(
 
Andy  G4JNT
 


--
The Information contained in this E-Mail and any subsequent correspondence
is private and is intended solely for the intended recipient(s).
For those other than the recipient any disclosure, copying, distribution,
or any action taken or omitted to be taken in reliance on such information is
prohibited and may be unlawful.
 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29054 invoked from network); 6 Dec 2000 10:24:39 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 6 Dec 2000 10:24:39 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 13754 invoked from network); 6 Dec 2000 10:26:46 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 6 Dec 2000 10:26:46 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143bWL-00043c-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 10:09:53 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from tele-post-20.mail.demon.net ([194.217.242.20]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143bWI-00043X-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 10:09:51 +0000 Received: from telemetry.demon.co.uk ([194.222.19.114]) by tele-post-20.mail.demon.net with smtp (Exim 2.12 #2) id 143bW2-0008vZ-0K for rsgb_lf_group@blacksheep.org; Wed, 6 Dec 2000 10:09:36 +0000 Message-ID: Date: Wed, 6 Dec 2000 10:11:58 +0000 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: Re: LF: Toroid cores In-reply-to: <3.0.1.16.20001205171454.38bf9fc2@mail.cc.kuleuven.ac.be> MIME-Version: 1.0 X-Mailer: Turnpike Version 3.03a Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In message <3.0.1.16.20001205171454.38bf9fc2@mail.cc.kuleuven.ac.be>, Rik Strobbe writes > >But be aware the in contradiction to the above the core material is far >more critical for use in low pass filters or any other resonant circuits. >There the 'red' Amidon cores can be used. > Or use air cored coils for the filters as I do. They don't work out much bigger than using toroids. 73, Tom G3OLB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17176 invoked from network); 6 Dec 2000 09:28:12 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by extortion.plus.net with SMTP; 6 Dec 2000 09:28:12 -0000 Received: (qmail 11470 invoked from network); 6 Dec 2000 09:30:22 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 6 Dec 2000 09:30:22 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143agJ-0003qw-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 09:16:07 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143agI-0003qr-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 09:16:06 +0000 Received: from central.zetnet.co.uk (central.zetnet.co.uk [194.247.47.20]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id JAA24644 for ; Wed, 6 Dec 2000 09:16:00 GMT X-ZSender: g3ldo@zetnet.co.uk Message-ID: <2000120522213368199@zetnet.co.uk> Date: Tue, 5 Dec 2000 22:21:33 GMT To: rsgb_lf_group@blacksheep.org From: "Peter Dodd" X-Mailer: ZIMACS Version 1.20c 10000836 Subject: LF: Re: LF keep cool Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Mal, G3KEV said: > With the advent of large LF amplifiers and proposed super large amplifiers > capable of running up to 3kw output to the antenna, there is a requirement > to keep the loading coil COOL. With a transmitter running 900watts I can get 1watt erp even with my 'bit of wet string' so there is no need to run more power. To get 1watt erp I have to obtain 4.5amps antenna current with my antenna. The coil is wound with 1.5mm Litz wire (2.5mm including plastic insulation) with an RF resistance of approximately 5ohms and will dissipate around 100 watts during key-down periods. The coil area is cylinder 250mm long and 250mm in diameter. In practice the coil temperature rise is not detectable to the touch (after a long period or QRSS but with the transmitter off!). The coil inductance (and RF resistance) of a coil used with larger antennas is smaller so the heating effect will be even less. If you have a very small antenna then the coil has to made to Tesla coil proportions as in the I5TGC coil, see Fig 1.10 of the Low Frequency Experimenters Handbook. In this case the coil is made large to prevent flashover but serves to dissipate heat as well. My view is, that with the legal power, coil heating is not a problem. I was quite surprised to find that the 3C8F core will handle 900watts and is only slightly warm after a prolonged period of QRSS. > Use microbore copper tube to wind the coil. Interleave the turns with one of > the poly varities ropes to keep turns evenly spaced on coil former. Microbore copper tube would make a nice low loss coil but you would need over 250m of the stuff - a bit expensive. I wonder how much it would weigh? It would have an RF resistance of less than 2ohms so water cooling would hardly be neccesary! -- Regards, Peter, G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19231 invoked from network); 6 Dec 2000 07:34:25 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by extortion.plus.net with SMTP; 6 Dec 2000 07:34:25 -0000 Received: (qmail 17433 invoked from network); 6 Dec 2000 07:36:33 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 6 Dec 2000 07:36:33 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143YwA-0003S7-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Dec 2000 07:24:22 +0000 Received: from postfix1.free.fr ([212.27.32.21] ident=postfix) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143Yw8-0003S2-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Dec 2000 07:24:21 +0000 Received: from MarcVidal (toulouse-1-5-245.dial.proxad.net [213.228.5.245]) by postfix1.free.fr (Postfix) with SMTP id 6BDEC28109 for ; Wed, 6 Dec 2000 08:24:14 +0100 (MET) Message-ID: <001901c05f55$95240ac0$f505e4d5@MarcVidal> From: "f5maf" To: rsgb_lf_group@blacksheep.org References: Subject: LF: Re: 136 kHz transmission tests Date: Wed, 6 Dec 2000 08:23:40 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Claudio, I'll see if I can receive you, Could you tell me when your beacon is on the air (hour UTC)? 73 Marc F5MAF JN03PP ----- Original Message ----- From: "Claudio" To: Sent: Wednesday, December 06, 2000 12:31 AM Subject: LF: 136 kHz transmission tests > Hallo LF group, > > I'm planning to transmit some slow CW beacon from 7 to 10 december. > > My working conditions: QRG 136.375 kHz, Pout about 100W, 30 m wire antenna, > lossy coil :-( > In those day I plan to build a new coil. > > QTH locator is jn45pu 50 km north Milano. > > I'm not shure for internet connectivity from the portable QTH. > Reports are wellcome. > > 73 de Claudio > > ---------------------------------------------------------------------- > Claudio Pozzi http://www.qsl.net/ik2pii happy Linux user > E-Mail: Claudio > Date: 06-Dec-00 Time: 00:19:49 > This message was sent by XFMail > ---------------------------------------------------------------------- > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5755 invoked from network); 5 Dec 2000 23:39:23 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Dec 2000 23:39:23 -0000 Received: (qmail 2924 invoked from network); 5 Dec 2000 23:34:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 23:34:26 -0000 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143RUU-0001on-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 23:27:18 +0000 Received: from twingo.tiscalinet.it ([195.130.224.85]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143RUT-0001oi-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 23:27:17 +0000 Received: from orion.pii.net (62.11.58.244) by twingo.tiscalinet.it; 6 Dec 2000 00:21:15 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from clapo@localhost) by orion.pii.net (8.9.3/8.9.3) id AAA01658 for rsgb_lf_group@blacksheep.org; Wed, 6 Dec 2000 00:31:15 +0100 Message-ID: X-Mailer: XFMail 1.3 [p0] on Linux X-Priority: 3 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit MIME-Version: 1.0 Date: Wed, 06 Dec 2000 00:31:15 +0100 (CET) From: "Claudio" To: rsgb_lf_group@blacksheep.org Subject: LF: 136 kHz transmission tests Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hallo LF group, I'm planning to transmit some slow CW beacon from 7 to 10 december. My working conditions: QRG 136.375 kHz, Pout about 100W, 30 m wire antenna, lossy coil :-( In those day I plan to build a new coil. QTH locator is jn45pu 50 km north Milano. I'm not shure for internet connectivity from the portable QTH. Reports are wellcome. 73 de Claudio ---------------------------------------------------------------------- Claudio Pozzi http://www.qsl.net/ik2pii happy Linux user E-Mail: Claudio Date: 06-Dec-00 Time: 00:19:49 This message was sent by XFMail ---------------------------------------------------------------------- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8756 invoked from network); 5 Dec 2000 23:17:17 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by excalibur.plus.net with SMTP; 5 Dec 2000 23:17:17 -0000 Received: (qmail 791 invoked from network); 5 Dec 2000 23:12:25 -0000 Content-Transfer-Encoding: 8bit Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 5 Dec 2000 23:12:25 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 142rwX-00075Y-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Dec 2000 09:29:53 +0000 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 142rwW-00075T-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Dec 2000 09:29:52 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail.cc.kuleuven.ac.be (8.9.3/8.9.0) with SMTP id KAA161478 for ; Mon, 4 Dec 2000 10:29:42 +0100 Message-ID: <3.0.1.16.20001204112148.21b7844e@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Mon, 04 Dec 2000 11:21:48 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: Re: 73kHz Activity Tonight In-reply-to: <23351.200012011346@gemini> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello group, I saw Jim (M0BMU) with a solid 'O' beaconing on 71.65kHz friday night. I could heard the signal going on and off, but QRM/QRN was to bad for a normal CW copy. John (G4CNN) seemes to have improved his station, while I had some difficulties in reading him during our QSO a few days ago he was a solid 'O' and would have been a 329 in CW during his QSO with PA0BWL. On sunday morning F5MAF was a good 'O' copy, until there started a never ending QSO straight on top of Marc (the QSO included exchange of output power). Both stations were clearly audible with me (one 559 and the other even a lot stronger) and based on their locations they should have heard each other at least at the same strength. I know that the therapeutic value of QRSS is highly appreciated by some, but should QRSS not in the first place be a mode one uses to work stations that cannot be worked on faster modes (CW) ? Nothing against these long and strong signal QRSS QSOs, but to avoid that ones therapy becomes anothers frustration it might be usefull to keep the 137700-137800Hz segment for real weak signal contacts (keeping QSOs short) and have a ragshew or therapeutic segment arround 137600Hz. 73, Rik ON7YD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21344 invoked from network); 5 Dec 2000 22:15:02 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Dec 2000 22:15:02 -0000 Received: (qmail 23878 invoked from network); 5 Dec 2000 22:10:05 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 22:10:05 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143QBY-0001RY-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 22:03:40 +0000 Received: from email.cwcom.net ([195.44.0.150] helo=cwcom.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143QBW-0001RT-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 22:03:39 +0000 Received: from computer ([195.44.203.234]) by cwcom.net with Microsoft SMTPSVC(5.5.1877.537.53); Tue, 5 Dec 2000 22:04:52 +0000 Message-ID: <009801c05f09$de347ca0$30ce2cc3@computer> From: "Martin" To: rsgb_lf_group@blacksheep.org References: <34.dc13cb7.275ea431@aol.com> <5hlq2t8vijfc13vl8pa8d9v6perjj4t8kb@4ax.com> Subject: LF: mf beacons for shipping Date: Tue, 5 Dec 2000 22:22:02 -0000 Organization: M5CIX / G8CIX MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: As a keen yachtsman I am interested in comments made about direction finding beacons. To the best of my knowledge there are no operational beacons for shipping use in UK or adjacent waters. In fact it is a long time since I have seen a DF loop on a boat although some boats retain the receivers mainly to listen to shipping forecasts on 198khz. GPS has taken over as the primary radio position fixing method. Till recently the GPS satellite signal available for non military use was degraded so that the fix would be plus or minus 100m. To overcome this differential GPS was developed, sighting a GPS receiver at a known location and broadcasting the error. A receiver then feeds this error signal to the GPS on the boat which gives a correction to plus or minus 10m. Recently the error has been removed from the GPS signal which will makes this system redundant. I have copied the UK beacons out of Macmillan's Almanac uk differential beacons Khz 293.5 St Catherines Point 284.0 Lizard 299.0 Nash point 305.0 Point Lynas 294.0 Butt of Lewis 304.0 Sumburgh 311.0 Gridle Ness 302.5 Flambourgh Head 310.5 North Foreland If anyone is really excited about this I will copy out the page and post it somewhere! Martin M5CIX From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28190 invoked from network); 5 Dec 2000 21:58:23 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 5 Dec 2000 21:58:23 -0000 Received: (qmail 14758 invoked from network); 5 Dec 2000 21:53:28 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 5 Dec 2000 21:53:28 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143Puy-0001M5-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 21:46:32 +0000 Received: from postfix1.free.fr ([212.27.32.21] ident=postfix) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143Pux-0001M0-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 21:46:31 +0000 Received: from MarcVidal (toulouse-1-4-199.dial.proxad.net [213.228.4.199]) by postfix1.free.fr (Postfix) with SMTP id 943E328547 for ; Tue, 5 Dec 2000 22:46:23 +0100 (MET) Message-ID: <005d01c05f04$dbe80de0$c704e4d5@MarcVidal> From: "f5maf" To: rsgb_lf_group@blacksheep.org References: <3865.200012021556@gemini> Subject: LF: Re: 73kHz Activity Date: Tue, 5 Dec 2000 22:26:35 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi James , I would like to receive you on the 71KHz in QRSS mode. I'm receiving 60KHz 59+20. I use a SO42P converter and an inverted L antenne (137 KKz) with a 13mH coil. I saw that Valerio received you. When could you send in beacon mode? What is you frequency? 73 Marc F5MAF ----- Original Message ----- From: "James Moritz" To: Sent: Saturday, December 02, 2000 4:59 PM Subject: LF: 73kHz Activity > Dear LF group, > > Thanks to all those who sent reports of my 73kHz signals last night. > I gather DF6NM was trying to call me for a cross-band QSO; > unfortunately I was not actually set up for X-band operation last > night, so was not able to see Markus' signal, but I will certainly sort > this out in time for next Friday, or any time people would like to try > for a sked. > > I did not hear anyone else on 73kHz last night - however I did hear > a signal that was new to me. It was on about 71.70kHz, and > consisted of short "pips", a bit like one of the time signal stations, > except that there were about 40 pips per minute, which seems like > an awkward number for a time signal. It was barely audible on the > transmit antenna, but was several dB above the noise on the loop > antenna. Some pips were louder than others, a bit like the Russian > Alpha VLF beacons speeded up. I tried nulling the signal with the > loop - it was hard to find a null due to the noise from Rugby, but > was roughly north-east/south-west from my QTH. It was still there > today. Has anyone else heard this? Any ideas? > > Cheers, Jim Moritz > 73 de M0BMU > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7960 invoked from network); 5 Dec 2000 21:08:06 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 5 Dec 2000 21:08:06 -0000 Received: (qmail 2721 invoked from network); 5 Dec 2000 21:10:48 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 21:10:48 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143PDD-00015N-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 21:01:19 +0000 Received: from tungsten.btinternet.com ([194.73.73.81]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143PDC-00015I-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 21:01:18 +0000 Received: from [213.122.177.56] (helo=host213-122-177-56.btinternet.com) by tungsten.btinternet.com with smtp (Exim 3.03 #83) id 143PD6-0001IU-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 21:01:13 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Nick" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: keep cool Date: Tue, 05 Dec 2000 20:57:23 +0000 Message-ID: <5hlq2t8vijfc13vl8pa8d9v6perjj4t8kb@4ax.com> References: <34.dc13cb7.275ea431@aol.com> In-reply-to: <34.dc13cb7.275ea431@aol.com> X-Mailer: Forte Agent 1.8/32.548 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: On Tue, 5 Dec 2000 15:04:01 EST, you wrote: > >Thanks for the clarification, Nick. I found myself thinking that if we >exceeded the Curie point of air, we might be facing bigger problems than how >to couple power into an antenna. The problem with about 50 messages at once. I once say a dramatic demonstration of curie point when a switch mode PSU was in our test house for EMC certification, the noise levels increased by around 20dBs over a period of minutes as a certain (abused) toroid heated up. Eventually we proved it with a blower cooling the choke and watched the levels go back down by 20dBs. Nick From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1846 invoked from network); 5 Dec 2000 21:04:16 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 5 Dec 2000 21:04:16 -0000 Received: (qmail 29417 invoked from network); 5 Dec 2000 21:06:21 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 21:06:21 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143P9p-00011F-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 20:57:49 +0000 Received: from tomts5.bellnexxia.net ([209.226.175.25] helo=tomts5-srv.bellnexxia.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143P9n-000110-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 20:57:47 +0000 Received: from server1 ([216.209.110.61]) by tomts5-srv.bellnexxia.net (InterMail vM.4.01.03.00 201-229-121) with SMTP id <20001205205710.OKCW22808.tomts5-srv.bellnexxia.net@server1>; Tue, 5 Dec 2000 15:57:10 -0500 Message-ID: <001a01c05efd$88f617a0$0a00a8c0@ThreeLakes.ca> From: "Larry Kayser" To: rsgb_lf_group@blacksheep.org, alan@jalowe.demon.co.uk References: <005f01c05add$a5b13420$3121893e@default> <5.0.0.25.2.20001201095349.00a271b0@mail.pncl.co.uk> <2JrLJIAkuEK6EwHI@jalowe.demon.co.uk> Subject: LF: Acknowledge request, please turn it off. Date: Tue, 5 Dec 2000 15:50:41 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: ----- Original Message ----- From: "J. Alan Lowe" To: Sent: Friday, December 01, 2000 08:08 Subject: Re: LF: MF Beacons Alan: If possible would you please turn OFF your message acknowledgement request with each of your email submissions to the RSGB LF reflector. Each one of those requests is received over here and triggers some regrettable functions for those of us who have a determination not to receive viruses via our Email services. If you prefer not to turn this abominable feature off, let me know and I will set this system to refuse messages from yourself, something which I would prefer not to do of course. Thanks for considering this matter. Larry VA3LK From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22812 invoked from network); 5 Dec 2000 20:22:16 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Dec 2000 20:22:16 -0000 Received: (qmail 15624 invoked from network); 5 Dec 2000 20:17:19 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 20:17:19 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143OMG-0000oM-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 20:06:36 +0000 Received: from mta7-win.server.ntli.net ([62.253.164.47] helo=mta7-svc.virgin.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143OME-0000oF-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 20:06:34 +0000 Received: from p.cleal ([62.252.36.150]) by mta7-svc.virgin.net (InterMail vM.4.01.02.17 201-229-119) with SMTP id <20001205200628.EDQQ4157.mta7-svc.virgin.net@p.cleal> for ; Tue, 5 Dec 2000 20:06:28 +0000 Message-ID: <000901c05ef6$e9ca7820$9624fc3e@p.cleal> From: "Peter Cleall" To: "RSGB LF group" Subject: LF: NDB Date: Tue, 5 Dec 2000 20:05:22 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In a request for NDB information on the mailing list I have recently recommended the WAND-xls database. Before sending out the information , I checked the Irish aviation pages, saw that the WAND-XLS download was still offered, and did not check any further. I now find that the download button does not, now, go anywhere. I am now trying to get the information clarified as to if it has moved or is dead, If still out there, with a new URL. I will post it as soon as I know. I also have a copy of the original list of WAND which has world-wide coverage of 9000 LF, MF and VHF beacons. Even as a zipped file it is nearly 500 kB. It can be forwarded if anyone wishes to e-mail me direct. regards peter G8AFN From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25500 invoked from network); 5 Dec 2000 20:13:28 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by 10.226.25.101 with SMTP; 5 Dec 2000 20:13:28 -0000 Received: (qmail 6170 invoked from network); 5 Dec 2000 20:16:15 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 5 Dec 2000 20:16:15 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143OKS-0000nw-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 20:04:44 +0000 Received: from imo-r10.mx.aol.com ([152.163.225.10]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143OKQ-0000no-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 20:04:43 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from WarmSpgs@aol.com by imo-r10.mx.aol.com (mail_out_v28.34.) id l.34.dc13cb7 (4331) for ; Tue, 5 Dec 2000 15:04:02 -0500 (EST) From: WarmSpgs@aol.com Message-ID: <34.dc13cb7.275ea431@aol.com> Date: Tue, 5 Dec 2000 15:04:01 EST Subject: Re: LF: keep cool To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Windows AOL sub 117 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In a message dated 12/5/00 2:14:49 PM Eastern Standard Time, maad65@dial.pipex.com writes: << Following up on myself that (the curie point) does not apply to air cored coils of course. I only read the original message after sending this comment. >> Thanks for the clarification, Nick. I found myself thinking that if we exceeded the Curie point of air, we might be facing bigger problems than how to couple power into an antenna. 73, John From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14578 invoked from network); 5 Dec 2000 20:04:51 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 5 Dec 2000 20:04:51 -0000 Received: (qmail 8385 invoked from network); 5 Dec 2000 20:07:33 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 20:07:33 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 1421BY-0000QI-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 02 Dec 2000 01:09:52 +0000 Received: from tele-post-20.mail.demon.net ([194.217.242.20]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 1421BX-0000QD-00 for rsgb_lf_group@blacksheep.org; Sat, 02 Dec 2000 01:09:51 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from jalowe.demon.co.uk ([158.152.173.18]) by tele-post-20.mail.demon.net with esmtp (Exim 2.12 #2) id 1421BS-000C9h-0K for rsgb_lf_group@blacksheep.org; Sat, 2 Dec 2000 01:09:47 +0000 Message-ID: <2JrLJIAkuEK6EwHI@jalowe.demon.co.uk> Date: Sat, 2 Dec 2000 01:08:52 +0000 To: rsgb_lf_group@blacksheep.org From: "J. Alan Lowe" Disposition-Notification-To: "J. Alan Lowe" Subject: Re: LF: MF Beacons References: <005f01c05add$a5b13420$3121893e@default> <5.0.0.25.2.20001201095349.00a271b0@mail.pncl.co.uk> In-reply-to: <5.0.0.25.2.20001201095349.00a271b0@mail.pncl.co.uk> MIME-Version: 1.0 X-Mailer: Turnpike Integrated Version 5.01 U Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In message <5.0.0.25.2.20001201095349.00a271b0@mail.pncl.co.uk>, Walter Blanchard writes > >BTW, I tried the "Irish Air" website G8AFN recommended and couldn't find any >beacon listing there except on an individual basis airfield by airfield. >Anyway, >it only lists air beacons, not maritime. It also badly needs updating >as a website - most of the links they give don't exist anymore! >The SWM lists are a lot better. see http://web.inter.nl.net/hcc/Shortwave/B001.htm and subsequent pages for a list of beacons logged in the Netherlands. Alan, G3XZX From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9873 invoked from network); 5 Dec 2000 20:02:47 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 5 Dec 2000 20:02:47 -0000 Received: (qmail 6280 invoked from network); 5 Dec 2000 20:04:51 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 20:04:51 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143O9b-0000jV-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 19:53:31 +0000 Received: from asterix.tee.gr ([212.70.193.140]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143O9Z-0000jQ-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 19:53:29 +0000 Received: from teeserver.tee.gr (teeserver.tee.gr [212.70.193.130]) by asterix.tee.gr (8.9.3/8.9.3) with ESMTP id VAA29843 for ; Tue, 5 Dec 2000 21:53:32 +0200 (EET) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from odin ([212.70.200.90]) by teeserver.tee.gr (Netscape Messaging Server 4.1) with SMTP id G541X800.2JP for ; Tue, 5 Dec 2000 21:53:32 +0200 Message-ID: <3.0.2.32.20001205182730.006ddcb4@aurora.eexi.gr> X-Sender: sv1xv@aurora.eexi.gr X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.2 (32) Date: Tue, 05 Dec 2000 18:27:30 +0200 To: rsgb_lf_group@blacksheep.org From: "Costas Krallis" Subject: Re: LF: 500KHz and around In-reply-to: <000b01c055cb$7a3e5000$34d725c3@194.95.193.10.fen.baynet.de > MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: At 05:02 24/11/2000 +0100, you wrote: > I monitored 500KHz... Then at 16.06 utc suddenly " CQ CQ.." > " IAR5 QSW 511 (?) ....." and lost something. What is the meaning of QSW? It is Rome Radio and QSW has exactly the meaning the book says. It announced a maritime meteo transmission on 511 kHz. 73 Costas +------------------------------------------------------------+ | Costas Krallis SV1XV * LOC KM18UA | | P.O.Box 3066 * FAX: +30-1-3811362 | | GR-10210 Athens * E-Mail: sv1xv@eexi.gr | | GREECE * PGP key: 0x3BDBBC34 | +------------------------------------------------------------+ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19351 invoked from network); 5 Dec 2000 19:21:45 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 5 Dec 2000 19:21:45 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 5225 invoked from network); 5 Dec 2000 19:24:27 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 19:24:27 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143NTD-0000WE-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 19:09:43 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from oso.slonet.org ([207.114.180.2] ident=cbuttsch) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143NTB-0000W9-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 19:09:42 +0000 Received: from localhost by oso.slonet.org (8.9.3/8.9.3) with SMTP id LAA05763 for ; Tue, 5 Dec 2000 11:09:25 -0800 (PST) Date: Tue, 5 Dec 2000 11:09:20 -0800 (PST) From: "Clifford Buttschardt" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: keep cool In-reply-to: <54dq2t4bpfnoeu1svgekjkgs6g9bk6m25q@4ax.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Curie point in copper? Cliff K7RR From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8564 invoked from network); 5 Dec 2000 19:13:25 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 5 Dec 2000 19:13:25 -0000 Received: (qmail 29054 invoked from network); 5 Dec 2000 19:15:30 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 19:15:30 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143NPo-0000Vd-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 19:06:12 +0000 Received: from carbon.btinternet.com ([194.73.73.92]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143NPn-0000VY-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 19:06:11 +0000 Received: from [213.122.234.34] (helo=host213-122-234-34.btinternet.com) by carbon.btinternet.com with smtp (Exim 3.03 #83) id 143NPT-0007TB-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 19:05:51 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Nick" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: keep cool Date: Tue, 05 Dec 2000 19:02:00 +0000 Message-ID: References: <000201c05d07$98dc42e0$7417883e@default> <3.0.1.16.20001205170114.21af53c8@mail.cc.kuleuven.ac.be> <54dq2t4bpfnoeu1svgekjkgs6g9bk6m25q@4ax.com> In-reply-to: <54dq2t4bpfnoeu1svgekjkgs6g9bk6m25q@4ax.com> X-Mailer: Forte Agent 1.8/32.548 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: On Tue, 05 Dec 2000 18:32:29 +0000, you wrote: > > >Unless the heat takes you above the curie point in which case you will lose most >of the inductance suddenly. Following up on myself that does not apply to air cored coils of course. I only read the original message after sending this comment. Nick From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24560 invoked from network); 5 Dec 2000 19:11:49 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by excalibur.plus.net with SMTP; 5 Dec 2000 19:11:49 -0000 Received: (qmail 9523 invoked from network); 5 Dec 2000 19:06:55 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 5 Dec 2000 19:06:55 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143NFc-0000QF-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 18:55:40 +0000 Received: from carbon.btinternet.com ([194.73.73.92]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143NFb-0000QA-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 18:55:39 +0000 Received: from [213.1.187.100] (helo=z0w6t5) by carbon.btinternet.com with smtp (Exim 3.03 #83) id 143NFV-0006Nm-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 18:55:33 +0000 Message-ID: <004101c05eed$1fea9020$64bb01d5@z0w6t5> From: "Bill Staples" To: rsgb_lf_group@blacksheep.org References: <15831.200012051106@gemini> Subject: LF: Re: G0AKY's Virus Date: Tue, 5 Dec 2000 18:26:38 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Hi Jim
 
Many thanks for doing the honors,I owe you a pint next time we meet,NOV arrived yesterday
Best regards
73 Bill
----- Original Message -----
Sent: Tuesday, December 05, 2000 11:09 AM
Subject: LF: G0AKY's Virus

Dear LF group,

Had a phone call from Bill, G0AKY, last Friday night. Amongst other
things, he asked me if I could send this message to subscribers to
the RSGB LF reflector - Bill is aware that his computer is infected
with a virus, and apologizes for any problems this may have
caused. He is currently taking steps to remedy the problem, and
will wait until it is fixed before sending further E-mail to the LF
group.

I sent this initially around the time the LF reflector stopped working - apologies if this is the second time you have received this message.

Cheers, Jim Moritz
73 de M0BMU

From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23489 invoked from network); 5 Dec 2000 18:48:12 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Dec 2000 18:48:12 -0000 Received: (qmail 207 invoked from network); 5 Dec 2000 18:43:15 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 18:43:15 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143Mt4-0000KH-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 18:32:22 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from front6m.grolier.fr ([195.36.216.56]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143Mt1-0000KC-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 18:32:20 +0000 Received: from club-internet.fr (nas5-69.wms.club-internet.fr [213.44.32.69]) by front6m.grolier.fr (8.9.3/No_Relay+No_Spam_MGC990224) with ESMTP id TAA29825; Tue, 5 Dec 2000 19:32:09 +0100 (MET) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A2D33C3.213F4293@club-internet.fr> Date: Tue, 05 Dec 2000 19:29:08 +0100 From: "M & S" X-Mailer: Mozilla 4.5 [fr] (Macintosh; I; PPC) X-Accept-Language: fr,fr,es-ES MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Cc: f5maf@free.fr Subject: Re: LF: Mini log References: <001401c05c97$3a099ee0$1134e4d5@MarcVidal> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Marc, So, I see you're really on the air now. Congratulations! On my side, I've been quite rare on the air, even on HF and VHF+, since I'm changing job. The LF station is still alive, however, at least on the RX side. The transmitting dipole is partially on the ground and my amplifier is still at the construction point. Hope to be around on the soon. Listening is great. 73, Mark, F6JSZ > f5maf a *crit : > > Hi all, > After several months, I was received in England and in Italia. > I just received a message from Cesare I5TGC with a report : M and T > (for this morning). > I would like to thank all OMs who helped me. > > This my "mini log" : > > G3XDV his report : O my report : O > M0BMU M O > IK5ZPV M O > > > Now I'm also QRV in 71 KHz reception. > > 73 > Marc > F5MAF > JN03PP From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3331 invoked from network); 5 Dec 2000 18:47:18 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by extortion.plus.net with SMTP; 5 Dec 2000 18:47:18 -0000 Received: (qmail 28215 invoked from network); 5 Dec 2000 18:49:27 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 5 Dec 2000 18:49:27 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143Mx6-0000Kk-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 18:36:32 +0000 Received: from carbon.btinternet.com ([194.73.73.92]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143Mx5-0000Ke-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 18:36:31 +0000 Received: from [62.7.30.30] (helo=host62-7-30-30.btinternet.com) by carbon.btinternet.com with smtp (Exim 3.03 #83) id 143Mwv-0004Lp-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 18:36:22 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Nick" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: keep cool Date: Tue, 05 Dec 2000 18:32:29 +0000 Message-ID: <54dq2t4bpfnoeu1svgekjkgs6g9bk6m25q@4ax.com> References: <000201c05d07$98dc42e0$7417883e@default> <3.0.1.16.20001205170114.21af53c8@mail.cc.kuleuven.ac.be> In-reply-to: <3.0.1.16.20001205170114.21af53c8@mail.cc.kuleuven.ac.be> X-Mailer: Forte Agent 1.8/32.548 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: On Tue, 05 Dec 2000 17:01:14, you wrote: >PS : maybe if you take into account that copper at 100°C has a higher >resistance than copper at 20°C you might gain a few micro-Watts. Unless the heat takes you above the curie point in which case you will lose most of the inductance suddenly. Nick G4WHO (back to lurking) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12537 invoked from network); 5 Dec 2000 18:39:24 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Dec 2000 18:39:24 -0000 Received: (qmail 23389 invoked from network); 5 Dec 2000 18:34:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 18:34:26 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 142F20-0004Cn-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 02 Dec 2000 15:56:56 +0000 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 142F1z-0004Ci-00 for rsgb_lf_group@blacksheep.org; Sat, 02 Dec 2000 15:56:55 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.200.44] (helo=gemini) by hestia.herts.ac.uk with esmtp (Exim 3.16 #4) id 142EzX-0001mh-00 for rsgb_lf_group@blacksheep.org; Sat, 02 Dec 2000 15:54:23 +0000 Message-ID: <3865.200012021556@gemini> From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Sat, 2 Dec 2000 15:59:50 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: 73kHz Activity X-Mailer: Pegasus Mail for Win32 (v3.11) Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF group, Thanks to all those who sent reports of my 73kHz signals last night. I gather DF6NM was trying to call me for a cross-band QSO; unfortunately I was not actually set up for X-band operation last night, so was not able to see Markus' signal, but I will certainly sort this out in time for next Friday, or any time people would like to try for a sked. I did not hear anyone else on 73kHz last night - however I did hear a signal that was new to me. It was on about 71.70kHz, and consisted of short "pips", a bit like one of the time signal stations, except that there were about 40 pips per minute, which seems like an awkward number for a time signal. It was barely audible on the transmit antenna, but was several dB above the noise on the loop antenna. Some pips were louder than others, a bit like the Russian Alpha VLF beacons speeded up. I tried nulling the signal with the loop - it was hard to find a null due to the noise from Rugby, but was roughly north-east/south-west from my QTH. It was still there today. Has anyone else heard this? Any ideas? Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4243 invoked from network); 5 Dec 2000 15:54:54 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 5 Dec 2000 15:54:54 -0000 Received: (qmail 15419 invoked from network); 5 Dec 2000 15:56:59 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 15:56:59 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143KKI-0007yn-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 15:48:18 +0000 Received: from [195.47.110.226] (helo=dell1.cz.gmc.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143KKG-0007yi-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 15:48:17 +0000 Received: from p (p.maly.cz.gmc.net [192.168.1.22]) by dell1.cz.gmc.net with SMTP (Microsoft Exchange Internet Mail Service Version 5.5.2650.21) id YJA8X92B; Tue, 5 Dec 2000 16:47:21 +0100 Message-ID: <07eb01c05ed2$5bc73960$1601a8c0@maly.cz.gmc.net> From: "Petr Maly" To: rsgb_lf_group@blacksheep.org References: <000b01c055cb$7a3e5000$34d725c3@194.95.193.10.fen.baynet.de> Subject: LF: Re: 500KHz and around Date: Tue, 5 Dec 2000 16:45:14 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2014.211 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: This is a standard procedure on 500 kHz (I worked as radioofficer for nearly 10 years). From 15th minute and 45th minute each hour there are 3 minutes of silence (for calling SOS). Usually after that coastal stations transmit annoncement that they will broadcast WX or NX (navigational warnings) and QSW means the working freq of the coastal station. I can take a look to Admiralty List of Radio Signals which coastal stations IAR5 is. Probably Roma. Sometimes you can hear ship station calling a coastal station or one ship station calling another ship station on this freq (should not happen in silence periods). It is not true that 500 kHz is not used any more. It is only not compulsory for ships to listen on this freq for 8 hours a day or more. 73 Petr OK1FIG ----- Original Message ----- From: Walter Staubach To: Reflektor Sent: Friday, November 24, 2000 5:02 AM Subject: LF: 500KHz and around > When sitting at my desk last thursday and doing something I monitored > 500KHz > in the background. For a long time - nothing. > Then at 16.06 utc suddenly " CQ CQ.." (me: one jump out of the chair and > to > the receiver - who has a permission for 500?) " IAR5 QSW 511 (?) ....." > and > lost something. What is the meaning of QSW? The handbook said "I will > transmit on....." . So I tuned to 511KHz and heard a station giving a > weather-forecast for the mediteranian sea in fast CW. Maybe it was the > italian navy stn IAR5. > And I had expected a new DX on a new band. > 73 Walter DJ2LF > > --------------------------------------------- > Walter.Staubach@fen-net.de > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12412 invoked from network); 5 Dec 2000 15:46:48 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Dec 2000 15:46:48 -0000 Received: (qmail 2421 invoked from network); 5 Dec 2000 15:41:50 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 15:41:50 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 142YPY-0001D9-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 03 Dec 2000 12:38:32 +0000 Received: from carbon.btinternet.com ([194.73.73.92]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 142YPW-0001D4-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Dec 2000 12:38:31 +0000 Received: from [62.7.99.79] (helo=z0w6t5) by carbon.btinternet.com with smtp (Exim 3.03 #83) id 142YPQ-0003rh-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Dec 2000 12:38:25 +0000 Message-ID: <001a01c05d26$1662fba0$4f63073e@z0w6t5> From: "William Staples" To: rsgb_lf_group@blacksheep.org Subject: LF: Kak virus Date: Sun, 3 Dec 2000 12:38:30 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Hi All
 
My apologies to anyone who may hve been infected by Kak from my email my Norton anti virus failed to detect it.
Nedless to say new system installed all cleaned and disinfected.
73
Bill G0AKY
 
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13085 invoked from network); 5 Dec 2000 15:42:02 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 5 Dec 2000 15:42:02 -0000 Received: (qmail 5105 invoked from network); 5 Dec 2000 15:44:44 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 15:44:44 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143K64-0007uI-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 15:33:36 +0000 Received: from lepidachrosite.lion-access.net ([212.19.217.3]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143K62-0007uA-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 15:33:34 +0000 Received: from w8k3f0 (Brunch.Food.dialin.freeler.nl [212.26.213.64]) by lepidachrosite.lion-access.net (I-Lab) with SMTP id E8A69CAF0A; Tue, 5 Dec 2000 15:33:24 +0000 (GMT) Message-ID: <001f01c05ed2$40579a80$40d51ad4@w8k3f0> From: "Dick Rollema" To: "LF-Group" Cc: "Hans Peltzer" Subject: LF: Interesting web site Date: Tue, 5 Dec 2000 16:43:43 +0100 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
To All from PA0SE
 
Hans Peltzer, PA0HRP, drew my attention to an interesting web site: http://www.cpinternet.com/~lyle/models/lftxant.htm, featuring "Computer Modeling of LowFER Transmitting Antennas" by Lyle Koehler, K0LR. With several links to related URL's.
 
This may have been on the reflector before, but a repeat can't do harm.
 
73, Dick, PA0SE
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29523 invoked from network); 5 Dec 2000 15:30:17 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 5 Dec 2000 15:30:17 -0000 Received: (qmail 24618 invoked from network); 5 Dec 2000 15:32:22 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 15:32:22 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143JwM-0007qb-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 15:23:34 +0000 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143JwL-0007qW-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 15:23:33 +0000 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail.cc.kuleuven.ac.be (8.9.3/8.9.0) with SMTP id QAA800638 for ; Tue, 5 Dec 2000 16:22:49 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3.0.1.16.20001205171454.38bf9fc2@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Tue, 05 Dec 2000 17:14:54 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: Toroid cores In-reply-to: <000201c05d0a$0fecb0c0$ad19ff3e@oemcomputer> References: <000801c05b6d$7db8cd80$8928fc3e@p.cleal> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: My experience is that the core material is not so critical for a transformer. In my PA (450W out, variation of the G3YXM design) I use a 'double-U' core that was slaughtered from the HV transformer of an old TV set. It gets hand warm after longer QSO's. I you want to buy a core the 3C85 material (Philips) should be OK. But be aware the in contradiction to the above the core material is far more critical for use in low pass filters or any other resonant circuits. There the 'red' Amidon cores can be used. 73, Rik ON7YD At 09:18 3/12/00 -0000, you wrote: >Hi all, > >Can anyone point me to any sources that will give me information on core >mixes, properties and design criteria to assist me in realising output >transformers for an LF PA? >Data on the more esoteric cores available surplus seems to be very thin on >the ground.... > >Regards to all > >Paul G4MD > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1583 invoked from network); 5 Dec 2000 15:16:24 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Dec 2000 15:16:24 -0000 Received: (qmail 7830 invoked from network); 5 Dec 2000 15:11:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 15:11:26 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 142ZQo-0001Tu-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 03 Dec 2000 13:43:54 +0000 Received: from hugo.fen.baynet.de ([194.95.193.10] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 142ZQY-0001Ti-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Dec 2000 13:43:38 +0000 Received: from 194.95.193.10.fen.baynet.de (dialin-nbg-172.fen.baynet.de [195.37.215.52]) by hugo.fen.baynet.de (8.9.1/8.9.1) with SMTP id OAA24842 for ; Sun, 3 Dec 2000 14:40:03 +0100 (MET) Message-ID: <000a01c055cb$79088f20$34d725c3@194.95.193.10.fen.baynet.de> From: "Walter Staubach" To: "Reflektor" Subject: LF: First QSO to F-land Date: Fri, 24 Nov 2000 03:38:03 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Mci bcp F6BWO pour premier QSO avec F. 73 Walter DJ2LF --------------------------------------------- Walter.Staubach@fen-net.de From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5650 invoked from network); 5 Dec 2000 15:13:41 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 5 Dec 2000 15:13:41 -0000 Received: (qmail 12082 invoked from network); 5 Dec 2000 15:16:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 15:16:23 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143JiV-0007ly-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 15:09:15 +0000 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143JiT-0007lt-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 15:09:13 +0000 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail.cc.kuleuven.ac.be (8.9.3/8.9.0) with SMTP id QAA1196612 for ; Tue, 5 Dec 2000 16:09:08 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3.0.1.16.20001205170114.21af53c8@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Tue, 05 Dec 2000 17:01:14 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: keep cool In-reply-to: <000201c05d07$98dc42e0$7417883e@default> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Mal, Thanks for your tips to prevent the loadingcoil from overheating, this will be usefull for those who can get 10A or more into the antenna. Just one remark : >Dont waste all those hundreds of watts heating up your coil, send it up the >antenna. Cooling the coil will not get a mA more into the antenna. The power loss in the coil remains unchanged, it will just warm the water (advantage : tea is ready after each QRSS QSO) instead of the copper. So cooling is OK to prevent destruction of the coil but will not give you any more ERP. PS : maybe if you take into account that copper at 100°C has a higher resistance than copper at 20°C you might gain a few micro-Watts. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6730 invoked from network); 5 Dec 2000 14:52:21 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 5 Dec 2000 14:52:21 -0000 Received: (qmail 21593 invoked from network); 5 Dec 2000 14:54:29 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 5 Dec 2000 14:54:29 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 142VJO-0000L8-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 03 Dec 2000 09:19:58 +0000 Received: from mta03-svc.ntlworld.com ([62.253.162.43]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 142VJN-0000L3-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Dec 2000 09:19:57 +0000 Received: from oemcomputer ([62.255.25.173]) by mta03-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001203091952.WHYV3796.mta03-svc.ntlworld.com@oemcomputer> for ; Sun, 3 Dec 2000 09:19:52 +0000 Message-ID: <000201c05d0a$0fecb0c0$ad19ff3e@oemcomputer> From: "Paul & Vanessa" To: rsgb_lf_group@blacksheep.org References: <000801c05b6d$7db8cd80$8928fc3e@p.cleal> Subject: LF: Toroid cores Date: Sun, 3 Dec 2000 09:18:36 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all, Can anyone point me to any sources that will give me information on core mixes, properties and design criteria to assist me in realising output transformers for an LF PA? Data on the more esoteric cores available surplus seems to be very thin on the ground.... Regards to all Paul G4MD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3710 invoked from network); 5 Dec 2000 14:29:01 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 5 Dec 2000 14:29:01 -0000 Received: (qmail 9200 invoked from network); 5 Dec 2000 14:31:09 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 5 Dec 2000 14:31:09 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143J09-0007Yt-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 14:23:25 +0000 Received: from scutter.tele2.net.uk ([212.19.64.5] helo=scutter.tele2.co.uk) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143J08-0007Yl-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 14:23:24 +0000 Received: from master (wireless-066-114.tele2.co.uk [212.19.66.114]) by scutter.tele2.co.uk (Postfix) with SMTP id 967D013B45 for ; Tue, 5 Dec 2000 14:25:01 +0000 (GMT) From: "Martin" To: rsgb_lf_group@blacksheep.org Subject: LF: Viruses Date: Tue, 5 Dec 2000 14:22:39 -0000 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 In-reply-to: <000001c05d60$ff93e520$a8012cc3@computer> Importance: Normal Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Viruses I don't know whether Blacksheep got hit by a Virus or what, but I recently noticed that even when my machine was ideal but connected to the internet vast quantities of data were being sent out. After various other difficulties I installed Norton Anti Virus 2001, which discovered three different viruses resident in my machine. Infection came the KAK virus, an email entitled "hahaha" with a references to Snow White and a download of "Hamcom". The machine is now clear but I fear the infection has spread. Martin M5CIX From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11687 invoked from network); 5 Dec 2000 14:12:13 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 5 Dec 2000 14:12:13 -0000 Received: (qmail 1718 invoked from network); 5 Dec 2000 14:14:58 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 5 Dec 2000 14:14:58 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 142ZQg-0001Ts-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 03 Dec 2000 13:43:46 +0000 Received: from hugo.fen.baynet.de ([194.95.193.10] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 142ZQW-0001Tj-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Dec 2000 13:43:36 +0000 Received: from 194.95.193.10.fen.baynet.de (dialin-nbg-172.fen.baynet.de [195.37.215.52]) by hugo.fen.baynet.de (8.9.1/8.9.1) with SMTP id OAA24856 for ; Sun, 3 Dec 2000 14:40:06 +0100 (MET) Message-ID: <000b01c055cb$7a3e5000$34d725c3@194.95.193.10.fen.baynet.de> From: "Walter Staubach" To: "Reflektor" Subject: LF: 500KHz and around Date: Fri, 24 Nov 2000 05:02:05 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: When sitting at my desk last thursday and doing something I monitored 500KHz in the background. For a long time - nothing. Then at 16.06 utc suddenly " CQ CQ.." (me: one jump out of the chair and to the receiver - who has a permission for 500?) " IAR5 QSW 511 (?) ....." and lost something. What is the meaning of QSW? The handbook said "I will transmit on....." . So I tuned to 511KHz and heard a station giving a weather-forecast for the mediteranian sea in fast CW. Maybe it was the italian navy stn IAR5. And I had expected a new DX on a new band. 73 Walter DJ2LF --------------------------------------------- Walter.Staubach@fen-net.de From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1434 invoked from network); 5 Dec 2000 14:06:55 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 5 Dec 2000 14:06:55 -0000 Received: (qmail 28115 invoked from network); 5 Dec 2000 14:09:40 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 5 Dec 2000 14:09:40 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 142V6C-0000HY-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 03 Dec 2000 09:06:20 +0000 Received: from cmailg4.svr.pol.co.uk ([195.92.195.174]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 142V6B-0000HT-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Dec 2000 09:06:19 +0000 Received: from modem-116.chromium.dialup.pol.co.uk ([62.136.23.116] helo=default) by cmailg4.svr.pol.co.uk with smtp (Exim 3.13 #0) id 142V64-000044-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Dec 2000 09:06:13 +0000 Message-ID: <000201c05d07$98dc42e0$7417883e@default> From: "MAL HAMILTON" To: "rsgb" Subject: LF: keep cool Date: Sat, 2 Dec 2000 17:16:18 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: With the advent of large LF amplifiers and proposed super large amplifiers capable of running up to 3kw output to the antenna, there is a requirement to keep the loading coil COOL. Method 1 Use microbore copper tube to wind the coil. Interleave the turns with one of the poly varities ropes to keep turns evenly spaced on coil former. If you use ribbed former you will not need the rope. One 200 litre plastic water tank situated near by with a central heating circulating pump feeding into the low end of the coil tube . The top end of the coil tube is positioned over the top of the tank to vent the hot water into it. Use plastic thermal heating tube to connect between tank and coil at both ends. This will keep the loading coil cool for 50% duty cycle. For very slow cw or prolonged psk or msk use a larger tank say 600 litres or use Method 2. Method 2 Use plastic thermal tube to connect the coil feed to your mains water supply and vent it into a drain. The mains water pressure should be sufficient to keep the coil cool but if not then use a high pressure pump. Both these methods work and are required if using above 2 kw output and for those using 3kw and up use 25 mm copper covered thermal plastic insulated tube for your coil. Dont waste all those hundreds of watts heating up your coil, send it up the antenna. Let us all know how you get on. 73 de Mal/G3KEV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21113 invoked from network); 5 Dec 2000 13:42:50 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Dec 2000 13:42:50 -0000 Received: (qmail 13374 invoked from network); 5 Dec 2000 13:37:54 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 13:37:54 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143I7X-0007Go-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 13:26:59 +0000 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143I7W-0007Gj-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 13:26:58 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail.cc.kuleuven.ac.be (8.9.3/8.9.0) with SMTP id OAA931430 for ; Tue, 5 Dec 2000 14:26:52 +0100 Message-ID: <3.0.1.16.20001205151857.2defd2ac@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Tue, 05 Dec 2000 15:18:57 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: LF: weekend 1-3 december In-reply-to: <200012050541_MC2-BD39-AEBD@compuserve.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: The reflector seems to be working again, so here comes a short weekend report : - M0BMU was seen with a good 'O' signal on 70.65kHz, beaconing with call and locator. Signal was audible but too weak for a CW QSO (229 report). - G4CNN was seen on 137.7.. in QSO with PA0BWL, John's signal has significantly improved since last week, solid 'O' and audible, if QRN is low a CW contact should be possible. - F5MAF had also a solid 'O' signal on sunday morning, but unfortunately shortly after his CQ another station started a very long QSO right on top of Marc (made me wonder if it is really usefull to exchange data like output power in QRSS). 73, Rik ON7YD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17419 invoked from network); 5 Dec 2000 13:40:33 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Dec 2000 13:40:33 -0000 Received: (qmail 10997 invoked from network); 5 Dec 2000 13:35:38 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 13:35:38 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 142qGY-0006a5-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Dec 2000 07:42:26 +0000 Received: from hs-img-5.compuserve.com ([149.174.177.154] helo=sphmgaae.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 142qGX-0006a0-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Dec 2000 07:42:25 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by sphmgaae.compuserve.com (8.9.3/8.9.3/SUN-1.9) id CAA25478 for rsgb_lf_group@blacksheep.org; Mon, 4 Dec 2000 02:42:06 -0500 (EST) Date: Mon, 4 Dec 2000 02:41:12 -0500 From: "Holger 'Geri' Kinzel, DK8KW" Subject: LF: Looking for 2-3 Watt linear PA for LF To: rsgb_lf_group@blacksheep.org Message-ID: <200012040241_MC2-BD0B-D096@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF enthusiast, we had a nice Dutch/German LF meeting during the Dortmund rally last Saturday, consisting of Wil, PA0BWL, Wolf, operator of DF0WD, Ruediger, DK6JL and Hellmuth, DF7VX (the VHF/UHF manager of the DARC ...) and myself. On the fleemarket I got hold of an SSB exciter made by Hagenuk, called EX-1001. This exciter delivers CW/LSB/USB from 0.1 to 30 MHz in 100 Hz steps, so it is the ideal unit for BPSK/PSK31/HELL and similar experiments on LF that require linear modulation. The unit is supposed to deliver about 100 mW (7 Volts peak-to-peak@50 Ohm) from 400 kHz onwards, on 136 kHz unfortunately it is only 1 Volt peak-to-peak@50 Ohm, representing about 10 mW, not sufficient to drive the G0MRF-PA. Does anyone of you have a proven scheme of a small linear PA available, that delivers about 2 or 3 Watts from 10 mW, preferably from 18 Volts (which is the voltage used by the exciter)? I am sure a small audio amplifier would do ... Thank you very much, best 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 216 invoked from network); 5 Dec 2000 13:30:15 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Dec 2000 13:30:15 -0000 Received: (qmail 1769 invoked from network); 5 Dec 2000 13:25:19 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 13:25:19 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143Hyt-0007FL-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 13:18:03 +0000 Received: from ns1.swh.sk ([192.108.125.33]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143Hyq-0007FG-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 13:18:01 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from hermes.swh.sk (hermes [139.24.136.129]) by ns1.swh.sk (8.9.1/8.9.1) with ESMTP id OAA20934 for ; Tue, 5 Dec 2000 14:17:48 +0100 Received: from btss101a.swh.sk (btss.swh.sk [139.24.136.15]) by hermes.swh.sk (8.9.3/8.9.2) with ESMTP id OAA00145 for ; Tue, 5 Dec 2000 14:17:44 +0100 (MET) Received: by btss.swh.sk with Internet Mail Service (5.5.2448.0) id ; Tue, 5 Dec 2000 14:17:42 +0100 Message-ID: <29BDD4F529FCD311B631009027357C4E01AD87FC@btss103a.swh.sk> From: "Gasparik Richard" To: rsgb_lf_group@blacksheep.org Subject: RE: LF: Looking for 2-3 Watt Linear PA for LF Date: Tue, 5 Dec 2000 14:17:41 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2448.0) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Brian.. How did you drive two MRF linear amplifiers in parallel ? Rich OM2TW > -----Original Message----- > From: Brian Rogerson [SMTP:brian@esoterica.pt] > Sent: 5. december 2000 13:52 > To: rsgb_lf_group@blacksheep.org > Subject: Re: LF: Looking for 2-3 Watt Linear PA for LF > > Geri, > > >Does anyone of you have a proven scheme of a small linear PA available, > >that delivers about 2 or 3 Watts from 10 mW, preferably from 18 Volts > >(which is the voltage used by the exciter)? I am sure a small audio > >amplifier would do ... > > I have spent months fighting the TDA2030 which is only marginally stable. > > About three weeks ago I tried a LM1875, which has better bandwidth and > can be used down to a closed loop gain of 10dB. I am now using three > (one preamp and two in a bridge circuit) to drive two of David MRF > amplifiers in parallel. This IC is specified for +/- 24v but seems to > work quite happily on +/- 12v. > > 73, Brian > 73 Brian CT1DRP IN51QD 41 09 58N 08 39 11W > http://homepage.esoterica.pt/~brian > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16 invoked from network); 5 Dec 2000 13:26:04 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 5 Dec 2000 13:26:04 -0000 Received: (qmail 4987 invoked from network); 5 Dec 2000 13:28:46 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 13:28:46 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 142Bz1-0003Nr-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 02 Dec 2000 12:41:39 +0000 Received: from [212.239.30.36] (helo=mail.jumpy.it) by post.thorcom.com with esmtp (Exim 3.16 #1) id 142Bz0-0003Nm-00 for rsgb_lf_group@blacksheep.org; Sat, 02 Dec 2000 12:41:38 +0000 Received: from mailsrv.dii.unisi.it (213.213.9.182) by mail.jumpy.it (5.1.050) id 3A271D5400003707 for rsgb_lf_group@blacksheep.org; Sat, 2 Dec 2000 13:42:54 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A28EDD8.5F21AE0E@mailsrv.dii.unisi.it> Date: Sat, 02 Dec 2000 13:40:56 +0100 From: "Valerio" X-Mailer: Mozilla 4.61 [en] (X11; I; Linux 2.2.12-20 i586) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: 73kHz Activity Tonight References: <18564.200012011246@gemini> Content-Type: text/plain; charset=iso-8859-15; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear Jim, I received your beacon signal on 73 kHz last evening between 20.30-21.00 with strenght M to O. '73 ,Valerio (IK5ZPV) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12303 invoked from network); 5 Dec 2000 13:05:13 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Dec 2000 13:05:13 -0000 Received: (qmail 9919 invoked from network); 5 Dec 2000 13:00:17 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 13:00:17 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143HYT-00076c-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 12:50:45 +0000 Received: from orodruin.esoterica.pt ([195.22.0.166]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143HYP-00076V-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 12:50:42 +0000 Received: from ea.esoterica.pt (ea.esoterica.pt [195.22.0.204]) by orodruin.esoterica.pt (8.11.0/8.11.0) with ESMTP id eB5CoYe14415 for ; Tue, 5 Dec 2000 12:50:34 GMT X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from slave-6 (por097.esoterica.pt [195.22.5.97]) by ea.esoterica.pt (8.9.3/8.9.3) with SMTP id MAA07735 for ; Tue, 5 Dec 2000 12:50:32 GMT Message-ID: <3.0.5.32.20001205125228.00796b20@pop3.esoterica.pt> X-Sender: brian@pop3.esoterica.pt (Unverified) X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.5 (32) Date: Tue, 05 Dec 2000 12:52:28 +0000 To: rsgb_lf_group@blacksheep.org From: "Brian Rogerson" Subject: Re: LF: Looking for 2-3 Watt Linear PA for LF In-reply-to: <200012050541_MC2-BD39-AEBD@compuserve.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Geri, >Does anyone of you have a proven scheme of a small linear PA available, >that delivers about 2 or 3 Watts from 10 mW, preferably from 18 Volts >(which is the voltage used by the exciter)? I am sure a small audio >amplifier would do ... I have spent months fighting the TDA2030 which is only marginally stable. About three weeks ago I tried a LM1875, which has better bandwidth and can be used down to a closed loop gain of 10dB. I am now using three (one preamp and two in a bridge circuit) to drive two of David MRF amplifiers in parallel. This IC is specified for +/- 24v but seems to work quite happily on +/- 12v. 73, Brian 73 Brian CT1DRP IN51QD 41 09 58N 08 39 11W http://homepage.esoterica.pt/~brian From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1733 invoked from network); 5 Dec 2000 11:42:35 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Dec 2000 11:42:35 -0000 Received: (qmail 25393 invoked from network); 5 Dec 2000 11:37:39 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 11:37:39 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143GHa-0006gS-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 11:29:14 +0000 Received: from ns1.swh.sk ([192.108.125.33]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143GHY-0006gN-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 11:29:12 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from hermes.swh.sk (hermes [139.24.136.129]) by ns1.swh.sk (8.9.1/8.9.1) with ESMTP id MAA16256 for ; Tue, 5 Dec 2000 12:29:01 +0100 Received: from btss101a.swh.sk (btss.swh.sk [139.24.136.15]) by hermes.swh.sk (8.9.3/8.9.2) with ESMTP id MAA13294 for ; Tue, 5 Dec 2000 12:28:58 +0100 (MET) Received: by btss.swh.sk with Internet Mail Service (5.5.2448.0) id ; Tue, 5 Dec 2000 12:28:55 +0100 Message-ID: <29BDD4F529FCD311B631009027357C4E01AD871D@btss103a.swh.sk> From: "Gasparik Richard" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: Looking for 2-3 Watt Linear PA for LF Date: Tue, 5 Dec 2000 12:28:55 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2448.0) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Geri... Look on my web site http://www.qsl.net/om2tw in Technical project page (in main menu on the left side). Best regards... 73 de Rich OM2TW > -----Original Message----- > From: Holger 'Geri' Kinzel, DK8KW [SMTP:DK8KW@compuserve.com] > Sent: 5. december 2000 11:41 > To: INTERNET:rsgb_lf_group@blacksheep.org > Subject: LF: Looking for 2-3 Watt Linear PA for LF > > Dear LF enthusiast, > > nice to see that the reflector is back on again! > > We had a nice Dutch/German LF meeting during the Dortmund rally last > Saturday, consisting of Wil, PA0BWL, Wolf, DL4YHF (the operator of DF0WD), > Ruediger, DK6JL, Hellmuth, DF7VX (the VHF/UHF manager of the DARC ...) and > myself. > > On the fleemarket I got hold of an SSB exciter made by Hagenuk, called > EX-1001. This exciter delivers CW/LSB/USB from 0.1 to 30 MHz in 100 Hz > steps, so it is the ideal unit for BPSK/PSK31/HELL/FAX and similar > experiments on LF that require linear modulation. > > The unit is supposed to deliver about 100 mW (7 Volts peak-to-peak@50 > Ohm) > from 400 kHz onwards, on 136 kHz unfortunately it is only 1 Volt > peak-to-peak@50 Ohm, representing about 10 mW, not sufficient to drive the > G0MRF-PA. > > Does anyone of you have a proven scheme of a small linear PA available, > that delivers about 2 or 3 Watts from 10 mW, preferably from 18 Volts > (which is the voltage used by the exciter)? I am sure a small audio > amplifier would do ... > > Thank you very much, best 73 > > Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27290 invoked from network); 5 Dec 2000 11:29:21 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Dec 2000 11:29:21 -0000 Received: (qmail 14688 invoked from network); 5 Dec 2000 11:24:25 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 11:24:25 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 142ux8-00086K-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Dec 2000 12:42:42 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #1) id 142ux3-00086D-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Dec 2000 12:42:39 +0000 Received: from central.zetnet.co.uk (central.zetnet.co.uk [194.247.47.20]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id MAA11735 for ; Mon, 4 Dec 2000 12:42:27 GMT X-ZSender: g3ldo@zetnet.co.uk Message-ID: <2000120412544068199@zetnet.co.uk> Date: Mon, 4 Dec 2000 12:54:40 GMT To: rsgb_lf_group@blacksheep.org From: "Peter Dodd" X-Mailer: ZIMACS Version 1.20c 10000836 Subject: LF: Low Frequency Experimenter's Handbook Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit An update, comprising errata and addendum, for the Low Frequency Experimenter's Handbook will be posted on the RSGB website shortly. This material comprises mostly of information sent in by readers via e-mail, for which I thank you. I understand that the original MC1496G (can version) specified for the G4GVC converter is not available. I also understand that some of you may have built the converter using a chip with a different packaging. If so could you let me know how it worked out. -- Regards, Peter, G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1851 invoked from network); 5 Dec 2000 11:19:13 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Dec 2000 11:19:13 -0000 Received: (qmail 5574 invoked from network); 5 Dec 2000 11:14:18 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 11:14:18 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143Fvi-0006Zf-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 11:06:38 +0000 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143Fvf-0006Za-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 11:06:36 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.200.44] (helo=gemini) by hestia.herts.ac.uk with esmtp (Exim 3.16 #4) id 143FtB-00043z-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 11:04:01 +0000 Message-ID: <15831.200012051106@gemini> From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Tue, 5 Dec 2000 11:09:31 +0000 MIME-Version: 1.0 Content-Type: text/enriched; charset=US-ASCII Content-Transfer-Encoding: 8bit Subject: LF: G0AKY's Virus X-Mailer: Pegasus Mail for Win32 (v3.11) Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF group,

Had a phone call from Bill, G0AKY, last Friday night. Amongst other
things, he asked me if I could send this message to subscribers to
the RSGB LF reflector - Bill is aware that his computer is infected
with a virus, and apologizes for any problems this may have
caused. He is currently taking steps to remedy the problem, and
will wait until it is fixed before sending further E-mail to the LF
group.

I sent this initially around the time the LF reflector stopped working - apologies if this is the second time you have received this message.

Cheers, Jim Moritz
73 de M0BMU

From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29473 invoked from network); 5 Dec 2000 11:18:20 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Dec 2000 11:18:20 -0000 Received: (qmail 4586 invoked from network); 5 Dec 2000 11:13:24 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 11:13:24 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143Fva-0006ZY-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 11:06:30 +0000 Received: from anchor-post-31.mail.demon.net ([194.217.242.89]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143FvZ-0006ZT-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 11:06:29 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from jalowe.demon.co.uk ([158.152.173.18]) by anchor-post-31.mail.demon.net with esmtp (Exim 2.12 #1) id 143FvT-000396-0V for rsgb_lf_group@blacksheep.org; Tue, 5 Dec 2000 11:06:24 +0000 Message-ID: <0BML7NA8tML6Ewu3@jalowe.demon.co.uk> Date: Tue, 5 Dec 2000 11:03:24 +0000 To: rsgb_lf_group@blacksheep.org From: "J. Alan Lowe" Disposition-Notification-To: "J. Alan Lowe" Subject: Re: LF: MF Beacons References: <005f01c05add$a5b13420$3121893e@default> <5.0.0.25.2.20001201095349.00a271b0@mail.pncl.co.uk> In-reply-to: <5.0.0.25.2.20001201095349.00a271b0@mail.pncl.co.uk> MIME-Version: 1.0 X-Mailer: Turnpike Integrated Version 5.01 U Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: correction, sorry: see http://web.inter.nl.net/hcc/Shortwave/B001.htm and subsequent pages for a list of beacons logged in the Netherlands. 73, Alan, G3XZX From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28930 invoked from network); 5 Dec 2000 11:18:12 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Dec 2000 11:18:12 -0000 Received: (qmail 4424 invoked from network); 5 Dec 2000 11:13:16 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 11:13:16 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 142Ggn-0004fJ-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 02 Dec 2000 17:43:09 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from m11.boston.juno.com ([63.211.172.74]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 142Ggi-0004fB-00 for rsgb_lf_group@blacksheep.org; Sat, 02 Dec 2000 17:43:04 +0000 Received: from cookie.juno.com by cookie.juno.com for <"yokUgcxCbtTP7XLrpefewJo7ovlraImIuTp+0lNk4RSd/IAp5ydiVg=="> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from riese-k3djc@juno.com) by m11.boston.juno.com (queuemail) id FQA6C5JK; Sat, 02 Dec 2000 12:42:10 EST To: rsgb_lf_group@blacksheep.org Date: Sat, 2 Dec 2000 12:38:57 -0500 Subject: Re: LF: NDB listing Message-ID: <20001202.123919.-187445.1.riese-k3djc@juno.com> X-Mailer: Juno 2.0.11 X-Juno-Line-Breaks: 0-1,3-21 X-Juno-Att: 0 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit From: "Bob RIESE" Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: On Fri, 1 Dec 2000 08:05:31 -0000 "Peter Cleall" writes: >suggest you look at the following URL, it includes all the beacons and >their >locations >it can be saved as an excel spreadsheet and then sorted and or >filtered for >your requirements. > >http://www.web-ie.com/irishav/wand.htm > >regards > >peter G8AFN Peter I find that this file has moved and am unable to locate it does anyone have the new / correct location Bob From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25404 invoked from network); 5 Dec 2000 10:49:10 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by extortion.plus.net with SMTP; 5 Dec 2000 10:49:10 -0000 Received: (qmail 12846 invoked from network); 5 Dec 2000 10:51:18 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 5 Dec 2000 10:51:18 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143Fa4-0006Q3-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 10:44:16 +0000 Received: from ds-img-7.compuserve.com ([149.174.206.153] helo=spdmbaaa.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143Fa0-0006Pq-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 10:44:13 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by spdmbaaa.compuserve.com (8.9.3/8.9.3/SUN-1.9) id FAA04654 for rsgb_lf_group@blacksheep.org; Tue, 5 Dec 2000 05:43:37 -0500 (EST) Date: Tue, 5 Dec 2000 05:40:59 -0500 From: "Holger 'Geri' Kinzel, DK8KW" Subject: LF: Looking for 2-3 Watt Linear PA for LF To: rsgb_lf_group@blacksheep.org Message-ID: <200012050541_MC2-BD39-AEBD@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF enthusiast, nice to see that the reflector is back on again! We had a nice Dutch/German LF meeting during the Dortmund rally last Saturday, consisting of Wil, PA0BWL, Wolf, DL4YHF (the operator of DF0WD), Ruediger, DK6JL, Hellmuth, DF7VX (the VHF/UHF manager of the DARC ...) and myself. On the fleemarket I got hold of an SSB exciter made by Hagenuk, called EX-1001. This exciter delivers CW/LSB/USB from 0.1 to 30 MHz in 100 Hz steps, so it is the ideal unit for BPSK/PSK31/HELL/FAX and similar experiments on LF that require linear modulation. The unit is supposed to deliver about 100 mW (7 Volts peak-to-peak@50 Ohm) from 400 kHz onwards, on 136 kHz unfortunately it is only 1 Volt peak-to-peak@50 Ohm, representing about 10 mW, not sufficient to drive the G0MRF-PA. Does anyone of you have a proven scheme of a small linear PA available, that delivers about 2 or 3 Watts from 10 mW, preferably from 18 Volts (which is the voltage used by the exciter)? I am sure a small audio amplifier would do ... Thank you very much, best 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28019 invoked from network); 5 Dec 2000 10:48:30 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 5 Dec 2000 10:48:30 -0000 Received: (qmail 4660 invoked from network); 5 Dec 2000 10:43:37 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 5 Dec 2000 10:43:37 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 142z7N-00011I-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Dec 2000 17:09:33 +0000 Received: from postfix1.free.fr ([212.27.32.21] ident=postfix) by post.thorcom.com with esmtp (Exim 3.16 #1) id 142z7J-00011D-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Dec 2000 17:09:30 +0000 Received: from MarcVidal (toulouse-1-52-22.dial.proxad.net [213.228.52.22]) by postfix1.free.fr (Postfix) with SMTP id 1944828182 for ; Mon, 4 Dec 2000 18:09:21 +0100 (MET) Message-ID: <000a01c05e14$fca36f20$1634e4d5@MarcVidal> From: "f5maf" To: rsgb_lf_group@blacksheep.org Subject: LF: What's appening on the LF group Date: Mon, 4 Dec 2000 18:09:35 +0100 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Since Sunday morning , I havn't any message!
Marc
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23259 invoked from network); 5 Dec 2000 10:31:43 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by extortion.plus.net with SMTP; 5 Dec 2000 10:31:43 -0000 Received: (qmail 6356 invoked from network); 5 Dec 2000 10:33:51 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 5 Dec 2000 10:33:51 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143FFi-0006Jr-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 10:23:14 +0000 Received: from anchor-post-32.mail.demon.net ([194.217.242.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143FFh-0006Jm-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 10:23:13 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from jalowe.demon.co.uk ([158.152.173.18]) by anchor-post-32.mail.demon.net with esmtp (Exim 2.12 #1) id 143FFb-0002Ts-0W for rsgb_lf_group@blacksheep.org; Tue, 5 Dec 2000 10:23:08 +0000 Message-ID: Date: Tue, 5 Dec 2000 10:22:04 +0000 To: rsgb_lf_group@blacksheep.org From: "J. Alan Lowe" Disposition-Notification-To: "J. Alan Lowe" Subject: Re: LF: MF Beacons References: <005f01c05add$a5b13420$3121893e@default> <5.0.0.25.2.20001201095349.00a271b0@mail.pncl.co.uk> In-reply-to: <5.0.0.25.2.20001201095349.00a271b0@mail.pncl.co.uk> MIME-Version: 1.0 X-Mailer: Turnpike Integrated Version 5.01 U Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In message <5.0.0.25.2.20001201095349.00a271b0@mail.pncl.co.uk>, Walter Blanchard writes > >BTW, I tried the "Irish Air" website G8AFN recommended and couldn't find any >beacon listing there except on an individual basis airfield by airfield. >Anyway, >it only lists air beacons, not maritime. It also badly needs updating >as a website - most of the links they give don't exist anymore! >The SWM lists are a lot better. see hhtp://web.inter.nl.net/hcc/Shortwave/B001.htm and subsequent pages for a list of beacons logged in the Netherlands. 73, Alan, G3XZX From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26932 invoked from network); 1 Dec 2000 21:42:23 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 1 Dec 2000 21:42:23 -0000 Received: (qmail 15995 invoked from network); 1 Dec 2000 21:44:27 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 1 Dec 2000 21:44:27 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 141xtx-0007vL-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Dec 2000 21:39:29 +0000 Received: from fortune-rwcmta.excite.com ([198.3.99.203] helo=fortune.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 141xtv-0007vG-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Dec 2000 21:39:28 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from bubbles.excite.com ([199.172.153.29]) by fortune.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001201213850.FOF20934.fortune.excite.com@bubbles.excite.com> for ; Fri, 1 Dec 2000 13:38:50 -0800 Message-ID: <24101169.975706730549.JavaMail.imail@bubbles.excite.com> Date: Fri, 1 Dec 2000 13:38:47 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: 73kHz tonight 1.12.2000 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 213.104.152.7 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Jim, A good solid S6-7 here as usual with no fading. John, G4CNN _______________________________________________________ Tired of slow Internet? Get @Home Broadband Internet http://www.home.com/xinbox/signup.html From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26906 invoked from network); 1 Dec 2000 21:16:22 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 1 Dec 2000 21:16:22 -0000 Received: (qmail 27254 invoked from network); 1 Dec 2000 21:18:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 1 Dec 2000 21:18:26 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 141xTO-0007nF-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Dec 2000 21:12:02 +0000 Received: from mail11.svr.pol.co.uk ([195.92.193.23]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 141xTN-0007nA-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Dec 2000 21:12:01 +0000 Received: from modem-101.edoras.dialup.pol.co.uk ([62.136.171.101] helo=lvm) by mail11.svr.pol.co.uk with smtp (Exim 3.13 #0) id 141xTH-0003HS-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Dec 2000 21:11:55 +0000 Message-ID: <000201c05bdb$c5a898a0$65ab883e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. 73kHz activity Date: Fri, 1 Dec 2000 21:12:02 -0000 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Hi Jim,
No big deal I guess but ur sigs seen here 20:15 to 20:45, seem to have faded now.
73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20184 invoked from network); 1 Dec 2000 21:08:05 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by excalibur.plus.net with SMTP; 1 Dec 2000 21:08:05 -0000 Received: (qmail 536 invoked from network); 1 Dec 2000 21:03:19 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 1 Dec 2000 21:03:19 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 141xES-0007hI-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Dec 2000 20:56:36 +0000 Received: from gadolinium.btinternet.com ([194.73.73.111]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 141xER-0007hD-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Dec 2000 20:56:35 +0000 Received: from [213.1.70.29] (helo=default) by gadolinium.btinternet.com with smtp (Exim 3.03 #83) id 141xEI-0006Ih-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Dec 2000 20:56:26 +0000 Message-ID: <000601c05bd8$9a34f7c0$1d4601d5@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: Useful trick?? DEL B4 Read Date: Fri, 1 Dec 2000 20:51:28 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all, I suppose you all know about this but as a bit of an inveterate DOS hacker, it was a while before I found out how to delete messages in the inbox without reading or displaying them in the review panel. It does entail losing the messages either side, but I suppose they could be copied (note copied, NOT Moved, or else the select bar will drop to the unwanted message, which will then appear in the review window ) out to another folder so their header stays in the list. It goes like this:- 1. Read the files either side in the review panel 2. Select the file above the unwanted or suspect message 3. Move the cursor to the message below the suspect message and left-click with the shift-button held down This selects all messages between the two 'clicked-on', but it only displays the message below the suspect message in the review panel. 4. Press, or click DELETE I use this for removing any suspect messages, junk-mail, and unsolicited mail with attachments. After messages from Dave YMC, I also only use only text messages, though HTML will display in the review window. One thing I found to be a problem was updating Office, because it changed a lot of my Outlook settings without informing me. Probably old hat but might just be useful. Cheers de Alan G3NYK Alan.Melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19021 invoked from network); 1 Dec 2000 20:38:58 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by excalibur.plus.net with SMTP; 1 Dec 2000 20:38:58 -0000 Received: (qmail 10622 invoked from network); 1 Dec 2000 20:34:11 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 1 Dec 2000 20:34:11 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 141whG-0007ZK-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Dec 2000 20:22:18 +0000 Received: from mailman.zeta.org.au ([203.26.10.16]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 141whE-0007ZF-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Dec 2000 20:22:16 +0000 Received: from steve (ppp244.dyn154.pacific.net.au [210.23.154.244]) by mailman.zeta.org.au (8.8.7/8.8.7) with SMTP id HAA02855; Sat, 2 Dec 2000 07:22:04 +1100 Message-ID: <008a01c05bd4$7bb18600$0301a8c0@steve> From: "Steve Olney" To: "RSGB LF Group" , "LowFerQTH" Subject: LF: Synchronised QRSS... Date: Sat, 2 Dec 2000 07:22:33 +1100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: G'day All, With all the interest in synchronised QRSS it might be a good time to draw your collective attentions to some of the experimental modes I have been pushing for over a year now. Go to the URL below and scroll down to "Experimental Communications Modes". The FDK method described there uses synchronised tone transmissions of 60 secs for each character. Actual tests (as against armchair analysis) have shown that the usual method of trying to discern 60 sec lines on the spectrograph is inferior to dumping all the signal into two bins and deciding which are the two strongest tones in the channel. The software then calculates the difference and decodes this difference as a character. Have a look - you might consider if it has some merit. 73s Steve Olney (VK2ZTO/AXSO - QF56IK : Lat -33 34 07, Long +150 44 40) ============================================= HomePage URLs: http://www.qsl.net/vk2zto http://www.zeta.org.au/~ollaneg Containing:- ULF, ELF, VLF & LF Experimentation InfraSonic Experimentation Laser Comms DX Amateur Radio Astronomy ============================================= From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18846 invoked from network); 1 Dec 2000 18:41:23 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 1 Dec 2000 18:41:23 -0000 Received: (qmail 4920 invoked from network); 1 Dec 2000 18:44:01 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 1 Dec 2000 18:44:01 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 141v3u-00075Q-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Dec 2000 18:37:34 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from d06lmsgate.uk.ibm.com ([195.212.29.1]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 141v3r-00075J-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Dec 2000 18:37:31 +0000 Received: from d06relay01.portsmouth.uk.ibm.com (d06relay01.portsmouth.uk.ibm.com [9.166.84.147]) by d06lmsgate.uk.ibm.COM (1.0.0) with ESMTP id SAA40166 for ; Fri, 1 Dec 2000 18:22:39 GMT X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (ss6.bld.socks.ibm.com [9.14.4.71]) by d06relay01.portsmouth.uk.ibm.com (8.8.8m3/NCO v4.95) with ESMTP id SAA211526 for ; Fri, 1 Dec 2000 18:36:53 GMT Message-ID: <3A27EF8E.96035C91@usa.net> Date: Fri, 01 Dec 2000 19:35:58 +0100 From: "Alberto di Bene" Organization: Undisclosed X-Mailer: Mozilla 4.76 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Virus posted here (was Re: G4CNN QRSS) References: <000201ccb03b$335884e0$287001d5@z0w6t5> <001e01c05bb2$632e7830$0700000a@parissn2> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Stewart Nelson wrote: > Hi Bill and all, > > If you have not yet opened today's message from William Staples, don't - it has > the VBS.KakWorm virus attached. If you have already opened it and didn't get > an error message, you may have been infected; if your hard drive contains a file > called kak.hta you are in trouble, see > http://www.symantec.com/avcenter/venc/data/wscript.kakworm.html or your > favorite anti-virus site. > Hi all, just a note to say that the KakWorm virus is effective only if you use Outlook for your mail. With Netscape mail it seems to be unable to infect your PC. 73, Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20897 invoked from network); 1 Dec 2000 18:30:58 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 1 Dec 2000 18:30:58 -0000 Received: (qmail 19092 invoked from network); 1 Dec 2000 18:26:09 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 1 Dec 2000 18:26:09 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 141um0-00070P-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Dec 2000 18:19:04 +0000 Received: from mta4-svc.virgin.net ([194.168.54.145]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 141uly-00070K-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Dec 2000 18:19:02 +0000 Received: from p.cleal ([62.252.40.45]) by mta4-svc.virgin.net (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20001201181920.WPYO18977.mta4-svc.virgin.net@p.cleal> for ; Fri, 1 Dec 2000 18:19:20 +0000 Message-ID: <000201c05bc3$31a633a0$2d28fc3e@p.cleal> From: "Peter Cleall" To: "RSGB LF group" Subject: LF: Coaa radio clock and beaconsee software Date: Fri, 1 Dec 2000 15:27:22 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I have used this software on MSF on 60kHz as a means of manually setting my PCclock, I have not tried it on the mode that electronically sets your PC. There is obviously no timing errors or enormous errors with this manual method, depending on your interpretation of "accuracy". It is also worth looking at the same site for their "Beaconsee" software that checks reception of the NCDXF HF beacon network and indicates in real time the HF conditions. It also has a nice map of the world with real-time darkness and daylight footprints. regards peter cleall G8AFN -----Original Message----- From: JJ To: rsgb_lf_group@blacksheep.org Date: 01 December 2000 04:23 Subject: Re: LF: DCF77 to synchronize QRSS transmitter / receiver >>A decoder for these signals (using the soundcard) built inside a QRSS >>transmitting/receiving program could be a nice, simple and accurate >>synchronization source for synchronized or "coherent" modes. You would only >>have to feed that signal into the A/D-converter (soundcard) for a minute and >>could then tune the RX to the operating frequency. The PC's internal >>real-time clock will be accurate enough to generate the "second marks" for >>some hours. > >There is a program at this URL http://sapp.telepac.pt/coaa/radioclock.htm >called Radio Clock. Uses the soundcard to decode time signals. Tested it >here in the US and found that for some reason it is 1 minute off. > > >73, >Jon >W1JHJ >Plymouth, MA >FN41qw >http://geocities.com/ws1k.rm > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10699 invoked from network); 1 Dec 2000 16:37:53 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 1 Dec 2000 16:37:53 -0000 Received: (qmail 10598 invoked from network); 1 Dec 2000 16:39:57 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 1 Dec 2000 16:39:57 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 141t7O-0006SB-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Dec 2000 16:33:02 +0000 Received: from cmailg1.svr.pol.co.uk ([195.92.195.171]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 141t7L-0006Rz-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Dec 2000 16:33:00 +0000 Received: from modem-10.neon.dialup.pol.co.uk ([62.136.9.10] helo=default) by cmailg1.svr.pol.co.uk with smtp (Exim 3.13 #0) id 141t79-00062e-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Dec 2000 16:32:48 +0000 Message-ID: <003001c05bb3$a828e5a0$0a09883e@default> From: "MAL HAMILTON" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Re: Date: Fri, 1 Dec 2000 10:42:00 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: -----Original Message----- From: Rik Strobbe To: rsgb_lf_group@blacksheep.org Date: 27 November 2000 09:13 Subject: LF: Re: >GI3KEV is 549 (daytime) upto 579 (dark) here, but I wasn't able to raise >his attention yet. >BTW KEV's signal is about 6dB down on MM0ALM > >73, Rik ON7YD Thanks Rik for the observation on my signals, sorry I did not hear you for some reason. But I worked OH1TN both daytime and night also SM6PXJ and heard these stations quite a lot of the time while in GI. Had good reports each way with both. 73 de Mal/G3KEV/GI3KEV > >At 23:28 22/11/00 +0100, you wrote: >>Hrd GI/G3KEV/p at 16.40 with 429, also gud fer QRSS. When does he go QRSS? >>73 Walter DJ2LF >> >>--------------------------------------------- >>Walter.Staubach@fen-net.de >> >> >> > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6179 invoked from network); 1 Dec 2000 16:37:19 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 1 Dec 2000 16:37:19 -0000 Received: (qmail 10652 invoked from network); 1 Dec 2000 16:40:00 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 1 Dec 2000 16:40:00 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 141t7O-0006SD-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Dec 2000 16:33:02 +0000 Received: from cmailg1.svr.pol.co.uk ([195.92.195.171]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 141t7M-0006S0-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Dec 2000 16:33:00 +0000 Received: from modem-10.neon.dialup.pol.co.uk ([62.136.9.10] helo=default) by cmailg1.svr.pol.co.uk with smtp (Exim 3.13 #0) id 141t7B-00062e-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Dec 2000 16:32:49 +0000 Message-ID: <003101c05bb3$a91b8300$0a09883e@default> From: "MAL HAMILTON" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Datong VLF Converter Date: Fri, 1 Dec 2000 11:15:10 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: -----Original Message----- From: Martin Evans To: rsgb_lf_group@blacksheep.org Date: 25 November 2000 13:26 Subject: LF: Datong VLF Converter >Hi all! > >Just as a matter of interest, I've compared the direct reception of 136kHz >using a TS950SD, with a Datong converter using the TS950 as the ten-metre >IF. Using a 40 metre inverted L antenna, untuned, and with 9db attenuation >in front of the Datong to eliminate overloading, I can see no significant >difference in the reception of CFH between the two methods- so the 950 seems >to be a decent 136kHz receiver! Anybody got any comments on this? I would be >interested in hearing of other opinions of the 950 as a receiver on this >band. Having tamed a datong converter by adding about 40 db attenuation between antenna and converter it seemed to work very well. Without the attenuation it was terrible with severe overload. I understand they were meant to be used with short antennas and not my 120 ft vertical inv L system. With my antenna I have tried several receivers direct from antenna and there is very little difference amongst them. IC746, FT1000MP, TS50, IC706 ( pre amp on ) TS570. These receivers are all fitted with the narrowest cw filters available. With a smaller antenna things might be different regarding signal over noise and sensitivity. I also tried a FT847 with narrow filters and it was not as good as the others. The IC 706 is almost on par with the others with pre amp on and a large antenna, but you do need the 250 hz cw filter and an external DSP unit for the required selectivity. I tried a smaller antenna and the sensitivity was low. I also use the 706 as a stable driver for the tx on 13.6 mhz and divide down by 100. Use vfo A for tx and vfo B for rx. All controlled from one switch. The same procedure can be used on 73 khz. Divide down from 7.3 mhz. I have arranged an extra rx output for another rx if necessary. This is old hat, others are probably doing the same thing but it is the most convenient way of driving your big PA and guarantees a stable signal, no wobbly or jumpy signals. I key the PA and not the transceiver drive. 73 de Mal/G3KEV > >Martin Evans GW3UCJ > > > > > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15788 invoked from network); 1 Dec 2000 16:27:37 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by excalibur.plus.net with SMTP; 1 Dec 2000 16:27:37 -0000 Received: (qmail 15261 invoked from network); 1 Dec 2000 16:22:49 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 1 Dec 2000 16:22:49 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 141snO-0006J2-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Dec 2000 16:12:22 +0000 Received: from bucky-rwcmex.excite.com ([198.3.99.218] helo=bucky.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #1) id 141snN-0006Ix-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Dec 2000 16:12:21 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from bubbles.excite.com ([199.172.153.29]) by bucky.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20001201161143.DBTT12914.bucky.excite.com@bubbles.excite.com> for ; Fri, 1 Dec 2000 08:11:43 -0800 Message-ID: <20104986.975687103835.JavaMail.imail@bubbles.excite.com> Date: Fri, 1 Dec 2000 08:11:38 -0800 (PST) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: G4CNN QRSS MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Excite Inbox X-Sender-Ip: 213.104.151.124 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Bill, Yes we must try. If you are on tonight 137.72 +/- will give you a call. Actually I did see your sigs on wednesday evening, but I had promised Marc to try a QSO with him, so I didn't answer. As it happened Jim was already in QSO with him and I think I might have messed up things for them by calling nearby, not realising what was going on at first. Stupidly I had not set up Spectrogram properly so I didn't actually see Marc's signals. Sri guys, first faltering steps. Last night managed a successful call with Rik ON7YD and was very impressed with his skill and the efficiency of his two tone Visual CW. Best 73 John _______________________________________________________ Tired of slow Internet? Get @Home Broadband Internet http://www.home.com/xinbox/signup.html From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21316 invoked from network); 1 Dec 2000 16:22:57 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 1 Dec 2000 16:22:57 -0000 Received: (qmail 27482 invoked from network); 1 Dec 2000 16:25:01 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 1 Dec 2000 16:25:01 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 141stI-0006MI-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Dec 2000 16:18:28 +0000 Received: from [206.100.10.38] (helo=cobalt4.source.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 141stH-0006MD-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Dec 2000 16:18:27 +0000 Received: from parissn2 (AMontsouris-101-1-4-91.abo.wanadoo.fr [193.253.216.91]) by cobalt4.source.net (8.9.3/8.9.3) with SMTP id IAA13172 for ; Fri, 1 Dec 2000 08:18:14 -0800 Message-ID: <001e01c05bb2$632e7830$0700000a@parissn2> From: "Stewart Nelson" To: rsgb_lf_group@blacksheep.org References: <000201ccb03b$335884e0$287001d5@z0w6t5> Subject: LF: Virus posted here (was Re: G4CNN QRSS) Date: Fri, 1 Dec 2000 17:18:45 +0100 Organization: SC Group MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2919.6700 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Bill and all, If you have not yet opened today's message from William Staples, don't - it has the VBS.KakWorm virus attached. If you have already opened it and didn't get an error message, you may have been infected; if your hard drive contains a file called kak.hta you are in trouble, see http://www.symantec.com/avcenter/venc/data/wscript.kakworm.html or your favorite anti-virus site. Bill, please disinfect your machine. Everyone, please don't post H_T_M_L to a mailing list unless your message will really benefit from such formatting and you are sure that you are not sending malicious content. I just joined this list, as I am quite interested in the current QRSS thread. My apologies that my first post is off topic. 73, Stewart KK7KA ----- Original Message ----- From: "William Staples" To: Sent: Thursday, December 01, 2011 4:07 PM Subject: LF: G4CNN QRSS Hi John Nice Sigs hr last night as soon as I learn qso format perhaps Ill be able to answer 73 Bill G0AKY From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12818 invoked from network); 1 Dec 2000 15:54:19 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 1 Dec 2000 15:54:19 -0000 Received: (qmail 1512 invoked from network); 1 Dec 2000 15:56:23 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 1 Dec 2000 15:56:23 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 141sQ7-00068o-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Dec 2000 15:48:19 +0000 Received: from tungsten.btinternet.com ([194.73.73.81]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 141sQ6-00068j-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Dec 2000 15:48:18 +0000 Received: from [213.1.189.233] (helo=anuna-one.btinternet.com) by tungsten.btinternet.com with esmtp (Exim 3.03 #83) id 141sQ0-0005e1-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Dec 2000 15:48:13 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <5.0.2.1.0.20001201154437.025f0d90@pop3.norton.antivirus> X-Sender: andrew.nunn/mail.btinternet.com@pop3.norton.antivirus X-Mailer: QUALCOMM Windows Eudora Version 5.0.2 Date: Fri, 01 Dec 2000 15:47:42 +0000 To: rsgb_lf_group@blacksheep.org From: "Andrew Nunn" Subject: Re: LF: 73kHz Activity Tonight In-reply-to: <3A27B341.20231.11A6FBB@localhost> References: <18564.200012011246@gemini> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Mike, My virus checker (Norton AntiVirus 2001) indicates that the kak worm was associated with your last e-mail. Andrew G8AXO ------------------ At 14:18 01/12/2000 +0000, you wrote: > > I hope to be QRV on 73kHz tonight, by about 2000 at latest. If > > no other stations are around, I will send beacon signals in > > QRSS/normal CW for a few hours. Any listener reports will be very > > welcome. > >Sorry, nothing from me tonight. I am working this evening. Will be >on next Friday, or any time by request. > >Mike, G3XDV (IO91VT) >http://www.lf.thersgb.net From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22542 invoked from network); 1 Dec 2000 15:44:27 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 1 Dec 2000 15:44:27 -0000 Received: (qmail 22517 invoked from network); 1 Dec 2000 15:47:08 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 1 Dec 2000 15:47:08 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 141sHS-00067B-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Dec 2000 15:39:22 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from d06lmsgate-3.uk.ibm.com ([195.212.29.3]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 141sHH-000672-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Dec 2000 15:39:14 +0000 Received: from d06relay01.portsmouth.uk.ibm.com (d06relay01.portsmouth.uk.ibm.com [9.166.84.147]) by d06lmsgate-3.uk.ibm.com (1.0.0) with ESMTP id PAA52832 for ; Fri, 1 Dec 2000 15:30:12 GMT X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (ss6.bld.socks.ibm.com [9.14.4.71]) by d06relay01.portsmouth.uk.ibm.com (8.8.8m3/NCO v4.95) with ESMTP id PAA112706 for ; Fri, 1 Dec 2000 15:38:24 GMT Message-ID: <3A27C5B1.74B04845@usa.net> Date: Fri, 01 Dec 2000 16:37:21 +0100 From: "Alberto di Bene" Organization: Undisclosed X-Mailer: Mozilla 4.76 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Synchronised QRSS : another (stupid ?) idea References: <3.0.1.16.20001201145804.2c971846@mail.cc.kuleuven.ac.be> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Rik Strobbe wrote: > [snip] > If the FFT window slides over a transmitted dot the FFT result (for that > specific frequency) will increase, reach a maximum when the FTT bin > completely overlaps with the dot and then will decrease again. With other > words, a certain pattern will be created and if we know when the dot begins > (synchronisation) and the duration of the dot it might be possible to do a > kind of pattern recognition. > [snip] Rik, IMHO, if the SNR is high enough to allow for such a pattern recognition, then you won't have any need for it... if the goal is to be able to extract dots and dashes from static crashes, it is hard to beat the pattern recognition features of the humain brain. But I may be plainly wrong (it happened before...) 73 Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17465 invoked from network); 1 Dec 2000 15:40:34 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 1 Dec 2000 15:40:34 -0000 Received: (qmail 18518 invoked from network); 1 Dec 2000 15:43:15 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 1 Dec 2000 15:43:15 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 141sD2-00066V-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Dec 2000 15:34:48 +0000 Received: from fep02.swip.net ([130.244.199.130] helo=fep02-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.16 #1) id 141sD1-00066Q-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Dec 2000 15:34:47 +0000 Received: from oemcomputer ([212.151.31.149]) by fep02-svc.swip.net (InterMail vM.5.01.01.01 201-252-104) with SMTP id <20001201153407.DUTQ27169.fep02-svc.swip.net@oemcomputer> for ; Fri, 1 Dec 2000 16:34:07 +0100 Message-ID: <002d01c05bac$2faf6420$951f97d4@oemcomputer> From: "Johan Bodin" To: rsgb_lf_group@blacksheep.org Subject: LF: Warning! Kak worm! Date: Fri, 1 Dec 2000 16:34:24 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all My computer warned about possibly dangerous content in the message LF:G4CNN QRSS from William Staples. I had a quick look into the raw message code and it seems to contain the "kak virus". Be careful! 73 Johan SM6LKM