From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22315 invoked from network); 30 Jun 2001 21:12:04 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 30 Jun 2001 21:12:04 -0000 Received: (qmail 28437 invoked from network); 30 Jun 2001 21:10:53 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 30 Jun 2001 21:10:53 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15GRwO-0000kg-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Jun 2001 22:06:08 +0100 Received: from ds-img-7.compuserve.com ([149.174.206.153] helo=spdmbaaa.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15GRwN-0000kb-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Jun 2001 22:06:07 +0100 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 RAA03140 for rsgb_lf_group@blacksheep.org; Sat, 30 Jun 2001 17:04:55 -0400 (EDT) Date: Sat, 30 Jun 2001 17:04:18 -0400 From: "boffin1" Subject: LF: Re: DJ8WX kugelblitz.. To: rsgb_lf_group@blacksheep.org Message-ID: <200106301704_MC3-D7BE-59AA@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: Very interested to hear about the kugelblitz as I have to attend the International Conference on Ball Lightning in St Louis, USA at the end of this month. Please send details to my email address: boffin1@compuserve.com.uk . By the way my magnetic loop transmitting antenna was about 30 metres long and 10 metres high much shorter than Andy stated and 2 turns were better than one. 73 to all, Roger From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27162 invoked from network); 30 Jun 2001 20:49:39 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 30 Jun 2001 20:49:39 -0000 Received: (qmail 23386 invoked from network); 30 Jun 2001 20:48:28 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 30 Jun 2001 20:48:28 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15GRXW-0000ak-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Jun 2001 21:40:26 +0100 Received: from cmailg5.svr.pol.co.uk ([195.92.195.175]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15GRXR-0000af-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Jun 2001 21:40:21 +0100 Received: from modem-1019.javanese.dialup.pol.co.uk ([217.134.83.251] helo=robing) by cmailg5.svr.pol.co.uk with smtp (Exim 3.13 #0) id 15GRWi-0002v7-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Jun 2001 21:39:36 +0100 Message-ID: <000d01c1019c$a5aa1e40$fb5386d9@robing> From: "Robin T. Greenwood" To: rsgb_lf_group@blacksheep.org References: <001b01c1015b$92630860$0100007f@w8k3f0> Subject: LF: Re: Antenna grounding switch Date: Sat, 30 Jun 2001 20:41:13 +0100 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="------------080703060002060505090104" 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 multi-part message in MIME format. --------------080703060002060505090104 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: 8bit
Dick.
The  way the Euro is going it  may be fl12/2.20371 again...
Robin
----- Original Message -----
Sent: Saturday, June 30, 2001 12:54 PM
Subject: LF: Antenna grounding switch

To All from PA0SE
 
This picture comes from a 1929 price list. At that time one pound sterling was equivalent to about 12 Dutch guilders (ƒ).
 
I hope the picture will be properly reflected.
 
73, Dick, PA0SE
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39znP3/qs+PKbKAX3eiG1azOaX50pjfdnQd2emaiPnWqV93qV8d61smpda533etfB3vYxVc+ drKX3exnR3va1b52trc96j13e9zlXk+4z93ud8d73vW+d7733e9/B3zgBT94whfe8IdHPNIT v3jGl73ujYd85CU/+bWjlPKXx3zmNb95znfe858HfegMRT960pfe9KcnfEAAADs= --------------080703060002060505090104-- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17580 invoked from network); 30 Jun 2001 20:49:29 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 30 Jun 2001 20:49:29 -0000 Received: (qmail 17435 invoked from network); 30 Jun 2001 20:48:21 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 30 Jun 2001 20:48:21 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15GRYb-0000ar-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Jun 2001 21:41:33 +0100 Received: from cmailg5.svr.pol.co.uk ([195.92.195.175]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15GRYa-0000am-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Jun 2001 21:41:32 +0100 Received: from modem-63.lamark-angel.dialup.pol.co.uk ([62.137.36.191] helo=g3aqc) by cmailg5.svr.pol.co.uk with smtp (Exim 3.13 #0) id 15GRXw-00038k-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Jun 2001 21:40:52 +0100 Message-ID: <001801c101a5$0b483e00$bf24893e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: 73 KHz Beacon Date: Sat, 30 Jun 2001 21:40:49 +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
Hi All,
Thanks Ko for the report and pic.
Will run again tonight,for a little longer.Start 2330UTC until 0430
think the TX will cope!  73s Laurie. 
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25395 invoked from network); 30 Jun 2001 11:57:20 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 30 Jun 2001 11:57:20 -0000 Received: (qmail 21707 invoked from network); 30 Jun 2001 11:56:11 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 30 Jun 2001 11:56:11 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15GJH2-0004bN-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Jun 2001 12:50:52 +0100 Received: from rubellite.lion-access.net ([212.19.217.4]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15GJH1-0004bI-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Jun 2001 12:50:51 +0100 Received: from w8k3f0 (1Cust174.tnt9.rtm1.nl.uu.net [213.116.112.174]) by rubellite.lion-access.net (I-Lab) with SMTP id 6A65127C4 for ; Sat, 30 Jun 2001 11:49:20 +0000 (GMT) Message-ID: <001b01c1015b$92630860$0100007f@w8k3f0> From: "Dick Rollema" To: "LF-Group" Subject: LF: Antenna grounding switch Date: Sat, 30 Jun 2001 13:54:48 +0200 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="------------020600000602090306090608" 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: This is a multi-part message in MIME format. --------------020600000602090306090608 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: 8bit
To All from PA0SE
 
This picture comes from a 1929 price list. At that time one pound sterling was equivalent to about 12 Dutch guilders (ƒ).
 
I hope the picture will be properly reflected.
 
73, Dick, PA0SE
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39znP3/qs+PKbKAX3eiG1azOaX50pjfdnQd2emaiPnWqV93qV8d61smpda533etfB3vYxVc+ drKX3exnR3va1b52trc96j13e9zlXk+4z93ud8d73vW+d7733e9/B3zgBT94whfe8IdHPNIT v3jGl73ujYd85CU/+bWjlPKXx3zmNb95znfe858HfegMRT960pfe9KcnfEAAADs= --------------020600000602090306090608-- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5073 invoked from network); 30 Jun 2001 11:20:46 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 30 Jun 2001 11:20:46 -0000 Received: (qmail 25931 invoked from network); 30 Jun 2001 11:19:39 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 30 Jun 2001 11:19:39 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15GIha-0004L7-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Jun 2001 12:14:14 +0100 Received: from smtp2.wanadoo.nl ([194.134.35.138] helo=smtp.wanadoo.nl) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15GIhZ-0004L2-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Jun 2001 12:14:13 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from default (p040.vcu.wanadoo.nl [194.134.200.40]) by smtp.wanadoo.nl (8.11.3/8.11.3) with SMTP id f5UBDTj23209 for ; Sat, 30 Jun 2001 13:13:29 +0200 (MEST) Message-ID: <200106301113.f5UBDTj23209@smtp.wanadoo.nl> Date: Sat, 30 Jun 2001 13:13:37 +0100 From: "Ko Versteeg" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re. 73KHz Beacon X-Mailer: FoxMail 2.1 [en] MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from 8bit to quoted-printable by smtp.wanadoo.nl id f5UBDTj23209 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: At 6/30/01 9:23:00, you wrote: >Hi John,Jim, Alan,and all, >Beacon ran fine last night, from 0000 to 0400 no fires! >Alan reports fairly quiet conditions,so lets hope some copy >over there. Will run again tonight, might as well catch the good conditions. 73s Laurie. > Hi Laurie. Ur sigs using: Argo: -47.8dB Speclab: -48.8dB SpectroGram -40dB Image was sent directly to you. 73's Ko Versteeg, NL9222 [Grid: JO22KE - Lat: 52° 12' 15.0"N Long: 04° 51' 40.5"E] Home: http://home.wanadoo.nl/nl9222/index.htm http://leden.tref.nl/~nl9222tv/default.htm From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15917 invoked from network); 30 Jun 2001 09:44:59 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 30 Jun 2001 09:44:59 -0000 Received: (qmail 8055 invoked from network); 30 Jun 2001 09:43:45 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 30 Jun 2001 09:43:45 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15GHDK-0003Wz-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Jun 2001 10:38:54 +0100 Received: from siaag1ae.compuserve.com ([149.174.40.7]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15GHDJ-0003Wu-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Jun 2001 10:38:53 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by siaag1ae.compuserve.com (8.9.3/8.9.3/SUN-1.9) id FAA23573 for rsgb_lf_group@blacksheep.org; Sat, 30 Jun 2001 05:38:11 -0400 (EDT) Date: Sat, 30 Jun 2001 05:37:51 -0400 From: "'Geri' Kinzel, DK8KW" Subject: Re: LF: Lightning -- Knife Switch Source To: rsgb_lf_group@blacksheep.org Message-ID: <200106300538_MC3-D7AD-8F4@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, >Mabe some of the old 'bakelite' ones are pretty poor, but the ones I >remember were made of white porcelain (I think) which should have good >RF properties. > >73, Tom G3OLB < .... the one I use is definetely made of ceramics, no flashovers whatsoever observed ... bought it some years ago in Dayton and definetely paid less for it than advertised on the website (18.- US$ or so, as far as I can remember ...). 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24567 invoked from network); 30 Jun 2001 09:44:04 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 30 Jun 2001 09:44:04 -0000 Received: (qmail 9465 invoked from network); 30 Jun 2001 09:42:56 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 30 Jun 2001 09:42:56 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15GHA5-0003Q4-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Jun 2001 10:35:33 +0100 Received: from smtp1.vol.cz ([195.250.128.43] helo=majordomo.vol.cz) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15GHA4-0003Pz-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Jun 2001 10:35:32 +0100 Received: from OK1FIG (prahac-80.dialup.vol.cz [212.20.107.169]) by majordomo.vol.cz (8.11.3/8.11.3) with SMTP id f5U9Yeu27289 for ; Sat, 30 Jun 2001 11:34:40 +0200 (CEST) (envelope-from ok1fig@volny.cz) Message-ID: <002501c10182$8b13ee40$a96b14d4@OK1FIG> From: "Petr Maly" To: rsgb_lf_group@blacksheep.org Subject: LF: QRV this weekend Date: Sat, 30 Jun 2001 09:34:08 -0700 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2014.211 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: Content-transfer-encoding: 8bit
Hi all
I am QRV again from the cottage, just made the first QSO now. Any skeds for tomorrow (Sunday) morning? I will read again e-mail today abt 1900 utc and Sunday morning. Still missing F land and LX1PD. QRV Visual-CW too. Reply to ok1fig@volny.cz
 
 
73 Petr OK1FIG
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2072 invoked from network); 30 Jun 2001 08:31:40 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 30 Jun 2001 08:31:40 -0000 Received: (qmail 9321 invoked from network); 30 Jun 2001 08:30:27 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 30 Jun 2001 08:30:27 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15GG3Y-0002to-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Jun 2001 09:24:44 +0100 Received: from cmailg3.svr.pol.co.uk ([195.92.195.173]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15GG3S-0002tj-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Jun 2001 09:24:38 +0100 Received: from modem-20.aftercomers.dialup.pol.co.uk ([62.136.99.20] helo=g3aqc) by cmailg3.svr.pol.co.uk with smtp (Exim 3.13 #0) id 15GG2l-0002Jw-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Jun 2001 09:23:56 +0100 Message-ID: <000c01c1013e$176ffd60$1463883e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: Re. 73KHz Beacon Date: Sat, 30 Jun 2001 09:23:34 +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
Hi John,Jim, Alan,and all,
Beacon ran fine last night, from 0000 to 0400 no fires!
Alan reports fairly quiet conditions,so lets hope some copy
over there. Will run again tonight, might as well catch the good conditions.  73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11299 invoked from network); 30 Jun 2001 06:54:08 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 30 Jun 2001 06:54:08 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 3452 invoked from network); 30 Jun 2001 06:53:00 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 30 Jun 2001 06:53:00 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15GEYs-000226-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Jun 2001 07:48:58 +0100 Received: from anchor-post-30.mail.demon.net ([194.217.242.88]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15GEYr-000221-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Jun 2001 07:48:57 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from telemetry.demon.co.uk ([194.222.19.114]) by anchor-post-30.mail.demon.net with smtp (Exim 2.12 #1) id 15GEaC-000HpU-0U for rsgb_lf_group@blacksheep.org; Sat, 30 Jun 2001 07:50:21 +0100 Message-ID: Date: Sat, 30 Jun 2001 07:38:29 +0100 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: Re: LF: Lightning -- Knife Switch Source In-reply-to: <3B3C7C1B.E1D89D99@netins.net> 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: Mabe some of the old 'bakelite' ones are pretty poor, but the ones I remember were made of white porcelain (I think) which should have good RF properties. 73, Tom G3OLB Dr. Tom Gruis writes >I have read that these old knife switches have very poor RF insulation >qualities. Perhaps this effect is frequency and/or power sensitive (for >want of better terminology) to some extent. > >Doc. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9457 invoked from network); 29 Jun 2001 20:44:26 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 29 Jun 2001 20:44:26 -0000 Received: (qmail 24076 invoked from network); 29 Jun 2001 20:43:13 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 29 Jun 2001 20:43:13 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15G52D-0005O9-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Jun 2001 21:38:37 +0100 Received: from cmailg1.svr.pol.co.uk ([195.92.195.171]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15G52C-0005Na-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Jun 2001 21:38:36 +0100 Received: from modem-102.beleg.dialup.pol.co.uk ([62.136.136.230] helo=g3aqc) by cmailg1.svr.pol.co.uk with smtp (Exim 3.13 #0) id 15G51W-0005KU-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Jun 2001 21:37:55 +0100 Message-ID: <000c01c100db$7634e3a0$e688883e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: Re Re 73KHz Beacon Date: Fri, 29 Jun 2001 21:37:50 +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
Frequency nearer to 71,921.5KHz.  30 sec dots of course. 73, Laurie. 
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27583 invoked from network); 29 Jun 2001 20:19:33 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 29 Jun 2001 20:19:33 -0000 Received: (qmail 21124 invoked from network); 29 Jun 2001 20:19:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 29 Jun 2001 20:19:23 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15G4e6-0005E3-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Jun 2001 21:13:42 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from [167.142.226.22] (helo=smtp-out.netins.net) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15G4e5-0005Dy-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Jun 2001 21:13:41 +0100 Received: from netins.net (desm-32-118.dsl.netins.net [167.142.32.118]) by smtp-out.netins.net (8.9.3/8.9.3) with ESMTP id PAA06280; Fri, 29 Jun 2001 15:12:59 -0500 (CDT) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B3CE148.3F37E5E6@netins.net> Date: Fri, 29 Jun 2001 15:12:56 -0500 From: "Dr. Tom Gruis" Organization: =?iso-8859-1?Q?www.gruis.org_&_K=D8HTF?= X-Sender: "Dr. Tom Gruis" <@smtp.netins.net> (Unverified) X-Mailer: Mozilla 4.76 [en]C-gatewaynet (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org, lowfer@qth.net Subject: LF: Beacons off for vacation. Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from 8bit to quoted-printable by smtp-out.netins.net id PAA06280 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello from Iowa, EN31do. In a few minutes I'll be turning off all 5 of my amateur beacons until the 11th of July. We will be on a touring vacation. The house and pet sitters are not radio people. I will leave the 175KHz. "D" operating. "Bitte vergessen Sie nicht die Antenne zu erden!" Doc, KØHTF, KAF4381, and "D" on longwave. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16158 invoked from network); 29 Jun 2001 20:13:46 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 29 Jun 2001 20:13:46 -0000 Received: (qmail 26801 invoked from network); 29 Jun 2001 20:12:58 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 29 Jun 2001 20:12:58 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15G4Z1-00056o-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Jun 2001 21:08:27 +0100 Received: from mail1.svr.pol.co.uk ([195.92.193.18]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15G4Z0-00056j-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Jun 2001 21:08:26 +0100 Received: from modem-104.dimrill.dialup.pol.co.uk ([62.136.155.104] helo=g3aqc) by mail1.svr.pol.co.uk with smtp (Exim 3.13 #0) id 15G4YL-0000GX-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Jun 2001 21:07:45 +0100 Message-ID: <000c01c100d7$3f6c10e0$689b883e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: re 73KHz Beacon tonight. Date: Fri, 29 Jun 2001 21:07:36 +0100 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit
Hi John,
All set to run tonight from about 0000UTC until 0400 UTC.
Freq 71.922 DFCW. Hope the TX does'nt blow up Hi.
Best wishes.  73s Laurie. 
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4197 invoked from network); 29 Jun 2001 16:02:41 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 29 Jun 2001 16:02:41 -0000 Received: (qmail 24275 invoked from network); 29 Jun 2001 16:01:28 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 29 Jun 2001 16:01:28 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15G0cP-0002vs-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Jun 2001 16:55:41 +0100 Received: from irwell.zetnet.co.uk ([194.247.47.48] helo=zetnet.co.uk ident=root) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15G0cO-0002vn-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Jun 2001 16:55:40 +0100 Received: from oemcomputer (man-s217.dialup.zetnet.co.uk [194.247.45.88]) by zetnet.co.uk (8.11.3/8.11.3/Debian 8.11.2-1) with SMTP id f5TFsw826950 for ; Fri, 29 Jun 2001 16:54:58 +0100 Message-ID: <000201c100b3$a22404a0$582df7c2@oemcomputer> From: "John Rabson" To: rsgb_lf_group@blacksheep.org References: Subject: LF: Re: Antenna Grounding Switches Date: Fri, 29 Jun 2001 13:50:12 +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: Maplin do a 2 pole 10 to 15A knife switch (FK31J) at GBP 1.79. Would it do? ----- Original Message ----- From: "Tom Boucher" To: "RSGB LF Group" Sent: Friday, June 29, 2001 8:03 AM Subject: LF: Antenna Grounding Switches > Thanks Costas and Geri, 'Ye Olde Navy Knife Switch' looks ideal but 42 > dollars plus shipping is a bit expensive! > > 73, Tom G3OLB > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27047 invoked from network); 29 Jun 2001 15:44:25 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 29 Jun 2001 15:44:25 -0000 Received: (qmail 24161 invoked from network); 29 Jun 2001 15:43:16 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 29 Jun 2001 15:43:16 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15G0JK-0002n4-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Jun 2001 16:35:58 +0100 Received: from jubilee.ns.sympatico.ca ([142.177.1.6] helo=mail-ns00s0.ns.sympatico.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15G0JH-0002mz-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Jun 2001 16:35:55 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.41.141]) by mail-ns00s0.ns.sympatico.ca (Post.Office MTA v3.5.3 release 223 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Fri, 29 Jun 2001 12:34:33 -0300 Message-ID: <3B3D0277.3E37E395@ns.sympatico.ca> Date: Fri, 29 Jun 2001 15:34:33 -0700 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: Re. 73KHz Beacon References: <000e01c10072$db9dace0$f47e883e@g3aqc> 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 Hi Laurie es Jim ,  I shud be QRV tonight.  &# de John VE1ZJ

Laurie Mayhead wrote:

Hi John,Jim and all,I think that Solar conditions are now as good as they are going to get for a while,so I would like to try the beacon again for 2/3 nights.John will you be able to "look" starting tonight and perhaps Jim will keep us company?  73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1232 invoked from network); 29 Jun 2001 13:40:37 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 29 Jun 2001 13:40:37 -0000 Received: (qmail 24486 invoked from network); 29 Jun 2001 13:39:24 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 29 Jun 2001 13:39:24 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FyOS-0001ku-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Jun 2001 14:33:08 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from [167.142.226.22] (helo=smtp-out.netins.net) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15FyO3-0001ko-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Jun 2001 14:32:44 +0100 Received: from netins.net (desm-32-118.dsl.netins.net [167.142.32.118]) by smtp-out.netins.net (8.9.3/8.9.3) with ESMTP id IAA16257; Fri, 29 Jun 2001 08:31:41 -0500 (CDT) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B3C833C.31960293@netins.net> Date: Fri, 29 Jun 2001 08:31:40 -0500 From: "Dr. Tom Gruis" Organization: =?iso-8859-1?Q?www.gruis.org_&_K=D8HTF?= X-Sender: "Dr. Tom Gruis" <@smtp.netins.net> (Unverified) X-Mailer: Mozilla 4.76 [en]C-gatewaynet (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: Please unsubscribe for a bit References: <3B3B1418.21239.91CEAE@localhost> <001001c10065$b8b8cbe0$5b1b6cd5@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: We will be leaving on a family vacation tomorrow and will not return until 11 July. Please disconnect me until then! 73, Doc. "Bitte vergessen Sie nicht die Antenne zu erden!" <-- LOVE that phrase! From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11870 invoked from network); 29 Jun 2001 13:15:11 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 29 Jun 2001 13:15:11 -0000 Received: (qmail 17139 invoked from network); 29 Jun 2001 13:14:01 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 29 Jun 2001 13:14:01 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Fy03-0001Uo-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Jun 2001 14:07:55 +0100 X-MSMail-Priority: Normal Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Fy02-0001Uj-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Jun 2001 14:07:55 +0100 Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 15FxzN-0004dR-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Jun 2001 14:07:13 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.232.252] (helo=mj9ar) by gemini.herts.ac.uk with smtp (Exim 3.22 #2) id 15FxzM-00047f-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Jun 2001 14:07:12 +0100 From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Fri, 29 Jun 2001 14:08:35 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: QRV Sunday/Tuesday, QRO/QRP on LF X-Mailer: Pegasus Mail for Win32 (v3.11) Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF group, I am rather busy at work at the moment with deadlines to meet and so on, but I hope to be QRV on 136k on Sunday morning for the SAQ broadcast and event station. I'm not sure if I will have the energy to run my 73k beacon signal overnight, but I will if I can. I would also like to be QRV on 73kHz on Tuesday morning , but will probably be restricted to times before 0800utc - any good to anyone? Regarding the recent discussion on the use of QRP at LF, the transmitter power by itself does not mean much, without considering the antenna too. Most of the time during my "solo" trip to the Puckeridge Decca station last year, I was only running a fraction of a watt into the big antenna there, but was able to work D, SM and so on without great difficulty during the daytime. 5W to the antenna would have been close to the 1W ERP limit. Getting results with both low power and a small antenna is a significant achievement. But feeding kilowatts into a few metres of wire will get you a lot of corona and not much more signal. I would agree that building a TX and loading coil, etc, for 1 - 200W output is not really more complex or expensive than building a QRP LF station. Operating around the 1kW level brings a fresh set of problems... Using QRSS is quite a good way to extend the range of a low- power station - the computer you are reading this on is probably the only additional equipment needed. I did some tests with G3XDV a while ago where only a few milliwatts into my (at that time) 5m high inverted L gave Mike decent QRSS copy about 10km away. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6242 invoked from network); 29 Jun 2001 13:09:34 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 29 Jun 2001 13:09:34 -0000 Received: (qmail 13928 invoked from network); 29 Jun 2001 13:08:34 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 29 Jun 2001 13:08:34 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FxuN-0001UR-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Jun 2001 14:02:03 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from [167.142.226.22] (helo=smtp-out.netins.net) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15FxuK-0001UM-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Jun 2001 14:02:00 +0100 Received: from netins.net (desm-32-118.dsl.netins.net [167.142.32.118]) by smtp-out.netins.net (8.9.3/8.9.3) with ESMTP id IAA24492; Fri, 29 Jun 2001 08:01:17 -0500 (CDT) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B3C7C1B.E1D89D99@netins.net> Date: Fri, 29 Jun 2001 08:01:15 -0500 From: "Dr. Tom Gruis" Organization: =?iso-8859-1?Q?www.gruis.org_&_K=D8HTF?= X-Sender: "Dr. Tom Gruis" <@smtp.netins.net> (Unverified) X-Mailer: Mozilla 4.76 [en]C-gatewaynet (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Lightning -- Knife Switch Source References: <200106290250_MC3-D77E-9595@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: I have read that these old knife switches have very poor RF insulation qualities. Perhaps this effect is frequency and/or power sensitive (for want of better terminology) to some extent. Doc. "Holger 'Geri' Kinzel, DK8KW" wrote: > > Tom, G3OLB: > > >Years ago I remember my grandfather having a wireless aerial (as it was > >known then) down his garden which came through an insulator in the > >window frame and was connected to a ceramic knife switch on the window- > >sill. This allowed changeover of the aerial from the wireless to earth > >during thunder storms. Does anyone know of a source of such switches > >these days? > > ... have a look at > > http://www.surplussales.com/Antennas/Antennas-4.html > > ... the second item is similar to the switch that I use to ground my > umbrella antenna whenever not in use. Is this the kind of switch you are > looking for? > > Best 73 > > Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6667 invoked from network); 29 Jun 2001 08:45:55 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 29 Jun 2001 08:45:55 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 26091 invoked from network); 29 Jun 2001 08:45:28 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 29 Jun 2001 08:45:28 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FtlE-0007hY-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Jun 2001 09:36:20 +0100 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 #2) id 15FtkR-0007hP-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Jun 2001 09:35:32 +0100 Received: from telemetry.demon.co.uk ([194.222.19.114]) by anchor-post-33.mail.demon.net with smtp (Exim 2.12 #1) id 15FtkO-0008JD-0X for rsgb_lf_group@blacksheep.org; Fri, 29 Jun 2001 09:35:28 +0100 Message-ID: Date: Fri, 29 Jun 2001 08:03:58 +0100 To: "RSGB LF Group" From: "Tom Boucher" Subject: LF: Antenna Grounding Switches 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: Thanks Costas and Geri, 'Ye Olde Navy Knife Switch' looks ideal but 42 dollars plus shipping is a bit expensive! 73, Tom G3OLB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22332 invoked from network); 29 Jun 2001 08:18:29 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 29 Jun 2001 08:18:29 -0000 Received: (qmail 25770 invoked from network); 29 Jun 2001 08:18:38 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 29 Jun 2001 08:18:38 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FtLf-0007YQ-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Jun 2001 09:09:55 +0100 Received: from mail3.svr.pol.co.uk ([195.92.193.19]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15FtLb-0007YL-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Jun 2001 09:09:51 +0100 Received: from modem-116.arossiach.dialup.pol.co.uk ([62.136.126.244] helo=g3aqc) by mail3.svr.pol.co.uk with smtp (Exim 3.13 #0) id 15FtKv-0006Xa-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Jun 2001 09:09:09 +0100 Message-ID: <000e01c10072$db9dace0$f47e883e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: Re. 73KHz Beacon Date: Fri, 29 Jun 2001 09:08:29 +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
Hi John,Jim and all,
I think that Solar conditions are now as good as they are going to get for a while,so I would like to try the beacon again for 2/3 nights.John will you be able to "look" starting tonight and perhaps Jim will keep us company?  73s Laurie.  
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26350 invoked from network); 29 Jun 2001 06:56:47 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 29 Jun 2001 06:56:47 -0000 Received: (qmail 20070 invoked from network); 29 Jun 2001 06:56:58 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 29 Jun 2001 06:56:58 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Fs8M-0006oL-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Jun 2001 07:52:06 +0100 Received: from ds-img-7.compuserve.com ([149.174.206.153] helo=spdmbaaa.compuserve.com) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Fs8B-0006oG-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Jun 2001 07:51:55 +0100 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 CAA19870 for rsgb_lf_group@blacksheep.org; Fri, 29 Jun 2001 02:50:41 -0400 (EDT) Date: Fri, 29 Jun 2001 02:50:23 -0400 From: "Holger 'Geri' Kinzel, DK8KW" Subject: Re: LF: Lightning -- Knife Switch Source To: rsgb_lf_group@blacksheep.org Message-ID: <200106290250_MC3-D77E-9595@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: Tom, G3OLB: >Years ago I remember my grandfather having a wireless aerial (as it was >known then) down his garden which came through an insulator in the >window frame and was connected to a ceramic knife switch on the window- >sill. This allowed changeover of the aerial from the wireless to earth >during thunder storms. Does anyone know of a source of such switches >these days? ... have a look at http://www.surplussales.com/Antennas/Antennas-4.html ... the second item is similar to the switch that I use to ground my umbrella antenna whenever not in use. Is this the kind of switch you are looking for? Best 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2043 invoked from network); 29 Jun 2001 06:41:08 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 29 Jun 2001 06:41:08 -0000 Received: (qmail 18531 invoked from network); 29 Jun 2001 06:41:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 29 Jun 2001 06:41:23 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Frrt-0006gK-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Jun 2001 07:35:05 +0100 Received: from hermes-2.bizonline.net ([212.95.128.6] helo=publiconline.co.uk) by post.thorcom.com with smtp (Exim 3.16 #2) id 15Frrs-0006gF-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Jun 2001 07:35:04 +0100 Received: (qmail 11431 invoked from network); 29 Jun 2001 06:34:22 -0000 Received: from unknown (HELO default) (213.108.27.91) by hermes-2.bizonline.net with SMTP; 29 Jun 2001 06:34:22 -0000 Message-ID: <001001c10065$b8b8cbe0$5b1b6cd5@default> From: "Julian Hardstone" To: rsgb_lf_group@blacksheep.org References: <3B3B1418.21239.91CEAE@localhost> Subject: LF: 12in Pipe Date: Fri, 29 Jun 2001 07:33:59 +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: A factory renovation has resulted in some 315mm dia. UPVC pipe, with 6mm wall thickness, being thrown out. If anyone wants some for a coil former, let me know quickly, before the skip goes. Will saw to length, you will have to pay post or collect. Julian G3TFR, Stockport. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4807 invoked from network); 28 Jun 2001 19:52:28 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 28 Jun 2001 19:52:28 -0000 Received: (qmail 16854 invoked from network); 28 Jun 2001 19:52:39 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Jun 2001 19:52:39 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Fhjr-0001Nj-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Jun 2001 20:46:07 +0100 Received: from postfix1-2.free.fr ([213.228.0.130]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Fhjn-0001Ne-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Jun 2001 20:46:04 +0100 Received: from rci (nas-cbv-2-52-221.dial.proxad.net [212.27.52.221]) by postfix1-2.free.fr (Postfix) with SMTP id 317FC1028FF for ; Thu, 28 Jun 2001 21:45:21 +0200 (CEST) Message-ID: <00a701c1000c$42e695e0$dd341bd4@rci> From: "f6kaw radio club d'ivry" To: rsgb_lf_group@blacksheep.org Subject: LF: tks to all Date: Thu, 28 Jun 2001 21:54:45 +0200 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 Alan, Steve, Dick, Alberto, Dave's(both mrf es yxm), Marc, Mike, Reiner... I wish to thank you all for your quick answer and help.... And i totally agree with Steve comments about QRP...In fact, i found the idea of building a qrp tx on LF interesting for one thing : encourage the member of the radio club (and of course anyone who want to join us) to simply begin a new activity which change a little from normal operation : build themselves with their "big fingers", and practise a lot to understand how does it works !!!!! (i use to be very kind in QRPconstructions !!!)... I think that it's certainly better to begin a new activity with qrp to test in local (20 kms arround, not more, hi !!!), and have a chance to complete a qso and compare our diverse homebrew projects (learn how to build coil and variometer, and above all how to use it correctly; perform antennas in our small "parisian's garden", hi !!, and so on....), and then , keep on going to more power and biggest antennas for DX.....This could help to develop 136khz in our zone... Keep in mind that we are really NEWBIES !!! i think that we will have to open some books (and destroy some calculators, hi !!!) to follow your steps...without being electrocuted by a flashing light !!!......( no, i'm joking !!!!)... The next step will be the construction of the PA ( DAVE'style at ab.250Wtts)....When we will be ready to transmit, i think that our principal trafic will be in normal CW to simplify the things....QRSS, DFCW and other modes later as we are often "outside" (i mean "FIELDDAY", see the photographs on our website when we tried 10ghz ATV with GUNN diode from Jean-paul, F5EJZ's boat in Normandy)..... Thanks also for the infos about the loop...I have a piece of KX4 (same thing that RG213, i believe ???), so, i'm going to have a try on it...As my holidays begin within 2 weeks, i don't think that i will have enough time to be really qrv, but i will take my little 50 mhz converter, and have a try on this band from JN16LU in center FRANCE, near BOURGES first; and then, from JN23?? in NIMES (dept. 30)...Any takers ???... Question just for info: UTOPY: a 1/4 lambda dipole (say abt 2*500mtrs at 60 mtrs high) would it be easier to tune and the performance better, or would it be too low (ground capacity) and impossible to tune ???????? Sorry for this long mail, i promise to reduce a little next time, hi !!!!...Thanks again to all and hope to hear u soon...Pascal.. PS (in french): Salut ,Marc...bien content d'avoir de tes nouvelles car j'avais perdu l'adresse de ton site...De nouvelles bidouilles LF en cours ???? 73's et a bientot.... Radio club: http://f6kaw.free.fr/ mail: http://f6kaw@free.fr/ http://f5pnp@free.fr/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9062 invoked from network); 28 Jun 2001 15:12:19 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 28 Jun 2001 15:12:19 -0000 Received: (qmail 29773 invoked from network); 28 Jun 2001 15:11:06 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Jun 2001 15:11:06 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FdJq-0007YB-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Jun 2001 16:02:58 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from firewall.dii.unisi.it ([193.205.7.2] ident=postfix) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15FdJm-0007Y6-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Jun 2001 16:02:54 +0100 Received: from alpha.dii.unisi.it (alpha [10.1.0.1]) by firewall.dii.unisi.it (Postfix) with ESMTP id 93BA23C0A5 for ; Thu, 28 Jun 2001 17:01:37 +0200 (CEST) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from mailsrv.dii.unisi.it (pcfasec.dii.unisi.it [10.6.9.1]) by alpha.dii.unisi.it (Postfix) with ESMTP id C622AA5857 for ; Thu, 28 Jun 2001 17:00:53 +0200 (CEST) Message-ID: <3B3B47CC.18986911@mailsrv.dii.unisi.it> Date: Thu, 28 Jun 2001 17:05:48 +0200 From: "Valerio Gabbani" 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: Lightning References: <3B3AF18E.19154.AE39A@localhost> Content-Type: text/plain; charset=iso-8859-2; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Mike Dennison wrote: > Not another theoretical piece about lightning damage. This is for real. > > Last night we had a bad storm for about an hour - I even saw QRN dots on my > cable TV. > > At 0000 UTC there was a huge bang and the air smelled of burning. The > mains power went off for a second but came back. > > The antenna was undamaged, but my 136kHz pre-amp is not working and, > more seriously, the mains socket that runs the 'shack' has no power on it. The > fuses are fine so I suspect the wiring or the double socket! > > All domestic applicances are safe, including the computer which was running > at the time. > > The antenna runs into a toroidal transformer so is always earthed and DC > isolated from the Tx/Rx. I presume that the nearby lightning strike induced > enough 136kHz RF into the resonant antenna to blow the pre-amp up. This is > spark transmission at its most powerful. > > More info when I have done a post-mortem (autopsy). > > Mike, G3XDV (IO91VT) > http://www.lf.thersgb.net Dear Mike and All, i'm very sorry for your bad experience, i think that probably the ligthning hit an aerial power line (or one of its pylon) near you, this explain why the mains power went off for few seconds, the induced voltage made the rest. I red with interest all the past discussions on the reflector about Lightning protection because i have two pole, one about 15 mt high in the middle of a field, the other 12mt high but on the roof of my house. So i'm not afraid about possible damage to the radio equipment in case of a direct strike but about my and house integrity. About a couple of mounths ago we have a thunderstorm, the bell tower of a small church about 1 kilometers away from me was dirctly hit by a lightning, it expoled and some persons living in a house close to the church ran the risk to die. Three weeks ago another thunderstorm, i was looking through the windows and suddenly a cypress about 150 meters from me caught fire hit by a lightning, i heard a spark noise in my shack an the differential automatic switch of my mains power switched off but no damage. ( i always disconnect the antenna connectors and power mains in the shack). Now i have the pole on the roof earthed with a 35 mm2 section copper cord connected to the house and radio earth, and the cables entering in the house can be disconnected outdoor. I hope, in case of direct hit, this is sufficient to save at least the house and the persons inside. Good luck to all, Valerio(IK5ZPV) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13443 invoked from network); 28 Jun 2001 12:51:58 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 28 Jun 2001 12:51:58 -0000 Received: (qmail 22631 invoked from network); 28 Jun 2001 12:51:06 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Jun 2001 12:51:06 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FbBW-0006HN-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Jun 2001 13:46:14 +0100 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 #2) id 15FbBR-0006HI-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Jun 2001 13:46:10 +0100 Received: from miked by rsgb.org.uk with SMTP (MDaemon.PRO.v4.0.0.R) for ; Thu, 28 Jun 2001 13:32:35 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Thu, 28 Jun 2001 13:32:33 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: LF link page Message-ID: <3B3B31F1.21857.1066563@localhost> In-reply-to: <3.0.1.16.20010627140305.21a7b326@mail.cc.kuleuven.ac.be> References: <3B39A2E4.5BBEDD4E@usa.net> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-Return-Path: miked@mail X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: ON7YD wrote: > On most 136kHz websites there is a more or less extended link page. Anyone > who has his own website will have experienced that a link page needs a lot > of maintainance (changing URL's, new websites come, other go), so it occurs to > me that there is a lot of avoidable work done. What about the idea that one of > us puts a 'complete' link page on his website and the others just put a link to > that page ? All changes of URL, new sites etc.. would be needed to be done only > once. If the others would keep an eye on it (report broken links and new sites) > the amount of work for the 'sitekeeper' would be acceptable. A good idea if: (1) The person responsible is prepared to do a lot of work. there must be more than 150 links between all of our web sites - my site has over 70. (2) There is a mirror site just in case the person responsible for the page stops updating it, or gives up the site. (3) There are very few restrictions on what links are listed. If you look at LF sites, there are often links that are slightly off topic (for instance, I have a link to Tesla coil people). Another possibility is a webring, linking LF sites. In this way each site owner is responsible for keeping his link up to date. 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 26017 invoked from network); 28 Jun 2001 12:47:10 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 28 Jun 2001 12:47:10 -0000 Received: (qmail 18330 invoked from network); 28 Jun 2001 12:47:21 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Jun 2001 12:47:21 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Fb6o-0006H3-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Jun 2001 13:41:22 +0100 Received: from protactinium.btinternet.com ([194.73.73.176] helo=protactinium) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Fb6i-0006Gy-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Jun 2001 13:41:16 +0100 Received: from [217.35.36.35] (helo=mud) by protactinium with smtp (Exim 3.22 #9) id 15Fb64-00002b-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Jun 2001 13:40:36 +0100 Message-ID: <001301c0ffd0$58ed48c0$0100a8c0@home> From: "G3YXM" To: rsgb_lf_group@blacksheep.org References: <3B3B1418.21239.91CEAE@localhost> Subject: Re: LF: Lightning Date: Thu, 28 Jun 2001 13:46:27 +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: Dear all. The lesson to be learned about lightning is, no matter what you do regarding earthing antennas, unplugging things etc. is that it isn't going to make the slightest difference if you get struck! I leave everything eathed in the vain hope that the aerial will act like the lightning conductor of a church etc. i.e. it will discharge the local area and prevent a strike (which start from the ground) developing. The problem there is; to be effective it needs a sharp point, the very thing you don't want on an LF aerial! Sorry about the damage Mike, I hope too much plaster doesn't have to come off the walls! I am presently trying to get tuned up on 73k for the first time since the great fire. It always amazes me just how much more loading inductance you need, I have just got down to the top of the band and hope to be inside it soon.... Anyone interested in some 73k activity on Tuesday morning? Rugby will hopefully be off for maintenance. I just had a QSO with G3CCH on 136 and he will be listening on his new IC746. 73. Dave G3YXM. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10994 invoked from network); 28 Jun 2001 11:53:08 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 28 Jun 2001 11:53:08 -0000 Received: (qmail 20752 invoked from network); 28 Jun 2001 11:53:22 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 28 Jun 2001 11:53:22 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FaEO-0005sb-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Jun 2001 12:45:08 +0100 X-MSMail-Priority: Normal Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15FaEK-0005sW-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Jun 2001 12:45:04 +0100 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 NAA1035514 for ; Thu, 28 Jun 2001 13:44:22 +0200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3.0.1.16.20010628124432.087fbb9a@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, 28 Jun 2001 12:44:32 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: Lightning In-reply-to: <3B3B1418.21239.91CEAE@localhost> References: <3B3AF18E.19154.AE39A@localhost> 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 Mike, I doubt that the street light had a 'direct hit' from lightning. So far I have seen the remains of a direct hit on 2 occasions, one was a 15m high oak that was reduced to a pile of burnt wood. The other occasion was the shack of another ham that was hit by lightning, resulting in all electric wires trown out of the wall, all alumium framed windows broken. Further all electronic equipement was damaged, even those that were not connected to anything. The fact that the street lamp is still alive (not even signs of burn) make me believe that it was a case of 'induction', not a direct hit. 73, Rik ON7YD At 11:25 28/06/01 +0100, you wrote: >More on my near miss with lightning. > >I have spoken to several neighbours in my road. Two saw the strike which >appeared to hit a street lamp 50 yards from my house. There is no sign of >damage to the lamp. One witness said the lightning struck the ground and then >flashed across to everything in the road. > >Although there are no burn marks anywhere, one neighbour's modem was >destroyed and another had the inside of his video recorder turned to ashes. >Even stranger was someone who reported a singing Christmas decoration >switching itself on whilst in its storage box in a cupboard. > >I have checked my house wiring and it seems that one of the socket feeds >has gone open circuit. It did not blow the fuse, and I now have to trace the >wiring in case there is a fire risk from the burnt out wires. > >It seems I was very lucky to get away with just a wrecked pre-amp, as the >whole shack, including my computer, was switched on at the time of the strike. > >Luckily the neighbours saw the lightning strike the road or lamp. I was afraid >they would blame my masts for attracting it. > > > >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 20177 invoked from network); 28 Jun 2001 11:12:13 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 28 Jun 2001 11:12:13 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 20234 invoked from network); 28 Jun 2001 11:12:27 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 28 Jun 2001 11:12:27 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FZdT-0005WT-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Jun 2001 12:06:59 +0100 Received: from anchor-post-33.mail.demon.net ([194.217.242.91]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15FZdS-0005WO-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Jun 2001 12:06:58 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from telemetry.demon.co.uk ([194.222.19.114]) by anchor-post-33.mail.demon.net with smtp (Exim 2.12 #1) id 15FZdZ-000Ask-0X for rsgb_lf_group@blacksheep.org; Thu, 28 Jun 2001 12:07:06 +0100 Message-ID: Date: Thu, 28 Jun 2001 10:39:57 +0100 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: Re: LF: Lightning In-reply-to: <3B3AF18E.19154.AE39A@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: Sorry to hear about your lightning strike Mike. Hope there is not too much damage. This discussion is certainly causing me to think about the whole issue, especially as my shack is in a converted stable, completely made of wood! Years ago I remember my grandfather having a wireless aerial (as it was known then) down his garden which came through an insulator in the window frame and was connected to a ceramic knife switch on the window- sill. This allowed changeover of the aerial from the wireless to earth during thunder storms. Does anyone know of a source of such switches these days? Translation: 'wireless' = radio 'earth' = ground 'aerial' = antenna 73, Tom G3OLB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13839 invoked from network); 28 Jun 2001 10:44:01 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 28 Jun 2001 10:44:01 -0000 Received: (qmail 11439 invoked from network); 28 Jun 2001 10:42:52 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 28 Jun 2001 10:42:52 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FZBQ-0005F9-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Jun 2001 11:38:00 +0100 Received: from tungsten.btinternet.com ([194.73.73.81]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15FZBP-0005F4-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Jun 2001 11:37:59 +0100 Received: from [217.35.36.35] (helo=mud) by tungsten.btinternet.com with smtp (Exim 3.22 #9) id 15FZAk-0003DQ-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Jun 2001 11:37:19 +0100 Message-ID: <000601c0ffbf$1f970040$0100a8c0@home> From: "G3YXM" To: rsgb_lf_group@blacksheep.org References: <005d01c0fe76$e6a457e0$ad2c1bd4@rci> <3B397DCB.F87B6FD3@alg.demon.co.uk> <000601c0feee$ef663ba0$0100a8c0@home> <3B3A3EAC.EFB6008C@alg.demon.co.uk> <002801c0ffb7$53bf06e0$050e7bd5@dave> Subject: Re: LF: freq: monitor ?? Date: Thu, 28 Jun 2001 11:43:09 +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: Steve, Dave and all. Dave said >May be a bit different in the remote parts of > France though. > Yes indeed, this is the point I was trying to make. I know a couple of people who have started on the band with a few Watts and great hopes, only to have them dashed and give up. I'm just trying to be realistic. I disagree that 200W is QRO on LF however, it's the RADIATED power we're interested in, not the amount heating up the garden. Remember that it's no more difficult to build a 200W TX than a 5W one, you just use bigger bits! BTW, there's lots of activity on here and little on the band.... anyone want a QSO? Dave G3YXM. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2217 invoked from network); 28 Jun 2001 10:38:08 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 28 Jun 2001 10:38:08 -0000 Received: (qmail 20957 invoked from network); 28 Jun 2001 10:36:55 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Jun 2001 10:36:55 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FZ5N-0005EU-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Jun 2001 11:31:45 +0100 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 #2) id 15FZ5J-0005EO-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Jun 2001 11:31:42 +0100 Received: from miked by rsgb.org.uk with SMTP (MDaemon.PRO.v4.0.0.R) for ; Thu, 28 Jun 2001 11:25:14 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Thu, 28 Jun 2001 11:25:12 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: Lightning Message-ID: <3B3B1418.21239.91CEAE@localhost> In-reply-to: <3B3AF18E.19154.AE39A@localhost> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-Return-Path: miked@mail X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: More on my near miss with lightning. I have spoken to several neighbours in my road. Two saw the strike which appeared to hit a street lamp 50 yards from my house. There is no sign of damage to the lamp. One witness said the lightning struck the ground and then flashed across to everything in the road. Although there are no burn marks anywhere, one neighbour's modem was destroyed and another had the inside of his video recorder turned to ashes. Even stranger was someone who reported a singing Christmas decoration switching itself on whilst in its storage box in a cupboard. I have checked my house wiring and it seems that one of the socket feeds has gone open circuit. It did not blow the fuse, and I now have to trace the wiring in case there is a fire risk from the burnt out wires. It seems I was very lucky to get away with just a wrecked pre-amp, as the whole shack, including my computer, was switched on at the time of the strike. Luckily the neighbours saw the lightning strike the road or lamp. I was afraid they would blame my masts for attracting it. 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 8160 invoked from network); 28 Jun 2001 09:55:22 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 28 Jun 2001 09:55:22 -0000 Received: (qmail 7105 invoked from network); 28 Jun 2001 09:54:14 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 28 Jun 2001 09:54:14 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FYOG-0004qB-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Jun 2001 10:47:12 +0100 Received: from tungsten.btinternet.com ([194.73.73.81]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15FYO4-0004q4-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Jun 2001 10:47:01 +0100 Received: from [213.123.14.5] (helo=dave) by tungsten.btinternet.com with smtp (Exim 3.22 #9) id 15FYNO-0000Tr-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Jun 2001 10:46:19 +0100 Message-ID: <002801c0ffb7$53bf06e0$050e7bd5@dave> From: "Dave Sergeant" To: "rsgb_lf_group" References: <005d01c0fe76$e6a457e0$ad2c1bd4@rci> <3B397DCB.F87B6FD3@alg.demon.co.uk> <000601c0feee$ef663ba0$0100a8c0@home> <3B3A3EAC.EFB6008C@alg.demon.co.uk> Subject: Re: LF: freq: monitor ?? Date: Thu, 28 Jun 2001 10:38:44 +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: >From Dave G3YMC Steve GW4ALG wrote: >it is true that QRP might result in disappointment - although >this probably depends upon expectations. However, my first tests >on 136 kHz were actually conducted using quite low power. (I >completed my first 136 kHz CW QSO with Graham G3XTZ over a >distance of 157 km using 15 watts RF. At the time, I was using a >very poor single-turn loop antenna: tuned by very lossy >capacitors; and fed by a very lossy balun. But it was a start. >For me, QRO and better antennas came later.) I would endorse Steve's comments. Obviously those who run several hundred watts into a big antenna make a bigger impression on the band. Others like me have shown that it is still possible to have much pleasure on the band with much lower powers and modest antennas. I have worked very much further than across town with my 35W and a loop, and nobody should be put off getting on the band because they cannot afford or do not have access to QRO resources. May be a bit different in the remote parts of France though. I am currently invesigating a vertical antenna at my impossible qth, however at the moment it seems to be an evaluation exercise as to how 'impossible' the qth is!! 73s Dave G3YMC dsergeant@iee.org dsergeant@btinternet.com http://www.dsergeant.btinternet.co.uk From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2262 invoked from network); 28 Jun 2001 08:15:16 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 28 Jun 2001 08:15:16 -0000 Received: (qmail 11833 invoked from network); 28 Jun 2001 08:15:30 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 28 Jun 2001 08:15:30 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FWkW-0003zm-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 28 Jun 2001 09:02:04 +0100 X-MSMail-Priority: Normal Received: from [213.2.16.106] (helo=rsgb.org.uk) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15FWkT-0003zh-00 for rsgb_lf_group@blacksheep.org; Thu, 28 Jun 2001 09:02:01 +0100 Received: from miked by rsgb.org.uk with SMTP (MDaemon.PRO.v4.0.0.R) for ; Thu, 28 Jun 2001 08:57:51 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Thu, 28 Jun 2001 08:57:50 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: Lightning Message-ID: <3B3AF18E.19154.AE39A@localhost> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-Return-Path: miked@mail X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Not another theoretical piece about lightning damage. This is for real. Last night we had a bad storm for about an hour - I even saw QRN dots on my cable TV. At 0000 UTC there was a huge bang and the air smelled of burning. The mains power went off for a second but came back. The antenna was undamaged, but my 136kHz pre-amp is not working and, more seriously, the mains socket that runs the 'shack' has no power on it. The fuses are fine so I suspect the wiring or the double socket! All domestic applicances are safe, including the computer which was running at the time. The antenna runs into a toroidal transformer so is always earthed and DC isolated from the Tx/Rx. I presume that the nearby lightning strike induced enough 136kHz RF into the resonant antenna to blow the pre-amp up. This is spark transmission at its most powerful. More info when I have done a post-mortem (autopsy). 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 11508 invoked from network); 27 Jun 2001 20:16:32 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 27 Jun 2001 20:16:32 -0000 Received: (qmail 19126 invoked from network); 27 Jun 2001 20:15:20 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 27 Jun 2001 20:15:20 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FLdP-0006qx-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Jun 2001 21:09:59 +0100 X-MSMail-Priority: Normal Received: from finch-post-10.mail.demon.net ([194.217.242.38]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15FLdO-0006qs-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Jun 2001 21:09:58 +0100 Received: from alg.demon.co.uk ([194.222.171.80]) by finch-post-10.mail.demon.net with esmtp (Exim 2.12 #1) id 15FLcS-000LOJ-0A for rsgb_lf_group@blacksheep.org; Wed, 27 Jun 2001 20:09:01 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B3A3EAC.EFB6008C@alg.demon.co.uk> Date: Wed, 27 Jun 2001 21:14:36 +0100 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: freq: monitor ?? References: <005d01c0fe76$e6a457e0$ad2c1bd4@rci> <3B397DCB.F87B6FD3@alg.demon.co.uk> <000601c0feee$ef663ba0$0100a8c0@home> 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 G3YXM wrote: > Pascal, I would recommend building a TX with at least 200W output to begin > with. Once you have made a few contacts you can improve the antenna etc. and > then try QRP. I think you will be disappointed if you start with only 5W. > Steve has been improving his station for years before he tried his QRP > experiment and he has the advantage of quite a few stations about 100km away > to give reports. It is true that QRP might result in disappointment - although this probably depends upon expectations. However, my first tests on 136 kHz were actually conducted using quite low power. (I completed my first 136 kHz CW QSO with Graham G3XTZ over a distance of 157 km using 15 watts RF. At the time, I was using a very poor single-turn loop antenna: tuned by very lossy capacitors; and fed by a very lossy balun. But it was a start. For me, QRO and better antennas came later.) Although I would not want to mislead people into thinking that they can work all around Europe with low power CW on 136 kHz, I am concerned that would-be experimenters could be discouraged if they are told repeatedly that they need a computer; DSP; a 50 Hz IF filter; and a QRO TX before starting their journey on LF. Instead, I think that it is important to encourage newcomers to _begin_ their LF journey - even if their first excursion only results in a tuned antenna - and a SWL report from 10 km across town! For some experimenters, this might be enough success to hasten their journey toward QRO, and better antennas. Regards to all, Steve GW4ALG From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4479 invoked from network); 27 Jun 2001 19:38:15 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 27 Jun 2001 19:38:15 -0000 Received: (qmail 22180 invoked from network); 27 Jun 2001 19:37:07 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 27 Jun 2001 19:37:07 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FL2O-0006Nz-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Jun 2001 20:31:44 +0100 Received: from pop.gmx.net ([194.221.183.20] helo=mail.gmx.net) by post.thorcom.com with smtp (Exim 3.16 #2) id 15FL2N-0006Nu-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Jun 2001 20:31:43 +0100 Received: (qmail 5506 invoked by uid 0); 27 Jun 2001 19:30:27 -0000 Received: from aadb8.pppool.de (HELO dr.nabe) (213.6.173.184) by mail.gmx.net (mp001-rz3) with SMTP; 27 Jun 2001 19:30:27 -0000 Message-ID: <004e01c0ff3f$81022d80$b8ad06d5@dr.nabe> From: "Reiner Nabe" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: freq: monitor ??DF3LP -ant. Date: Wed, 27 Jun 2001 21:27:02 +0200 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: -----Ursprüngliche Nachricht----- Von: f6kaw radio club d'ivry An: rsgb_lf_group@blacksheep.org Datum: Dienstag, 26. Juni 2001 21:34 Betreff: LF: freq: monitor ?? >>>From Pascal, F5PNP.... > > I'm a very, very newcomer in the world of LF...I visited a lot of sites >on internet to collect some informations about the activity, and plan to >built the little transmitter from GW4ALG (the marathon...)when i will find >the way to change the 3c85 core by another one...hi !!! ('cause impossible >to find it in FRANCE...).... > I prepare also a little converter (10.136mhz/136khz), because i think >that with only the FT847 direct on 136khz, and a dipole on 40 m, it 's not >the right way to hear something on this band, or am i wrong ?????? > I prepared also a "DF3LP COAX LOOP" to use during my holidays between >july and august in south west FRANCE. >Does anyone use this little antenna wit succes??? (2.20m diameter...).... > Talking about holidays, i think it would be very interesting to have a >decametric frequency to know in real time if somebody is cqing on 136khz, >like the VHF NET on 14340 MHZ....WHY NOT A 136KHZ NET ????...or if this >already exists, witch frequency do i use ?????..... > Another and last question, which may be evident for expert, but not for >me although the photographs.... In a variometer, the coil inside is put in >serie between the two outer coil of the variometer; or we build first the >outer coil, and then, we connect the inside coil in serie to terminal...??? >(i don't know if i'm not a little too complex...!!!! hi!!!)... > please excuse my bad english language....best 73's to all, good dx, and >hope to hear you soon on 136khz...Pascal... > > http://f5pnp@free.fr > radio club mail: http://f6kaw@free.fr > > PS: i'm a member of the radio club of ivry, F6KAW, near PARIS...here is >our web site: http://f6kaw.free.fr/ > hope to be soon qrv on 136 khz !!! > >Dear Pascal, Hr I´m using a DF3LP Coax Loop ( RgG 213 ) a long time,but I have added a simpel amplifiere (BC 550C ) with about 12 dB.The ant wkds vy well,so I heard a stn from OH 1450 km,but from Italy once vy vy weak only. >I hope to hear you soon Vy 73 Reiner - DL3FDO- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5648 invoked from network); 27 Jun 2001 18:08:17 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 27 Jun 2001 18:08:17 -0000 Received: (qmail 14514 invoked from network); 27 Jun 2001 18:07:15 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 27 Jun 2001 18:07:15 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FJer-0005jo-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Jun 2001 19:03:21 +0100 Received: from mta06-svc.ntlworld.com ([62.253.162.46]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15FJeq-0005jj-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Jun 2001 19:03:20 +0100 Received: from oemcomputer ([213.104.105.209]) by mta06-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20010627180238.RCMV295.mta06-svc.ntlworld.com@oemcomputer> for ; Wed, 27 Jun 2001 19:02:38 +0100 Message-ID: <003701c0ff33$689cdee0$d26168d5@oemcomputer> From: "mike.dennison" To: rsgb_lf_group@blacksheep.org References: <005d01c0fe76$e6a457e0$ad2c1bd4@rci> Subject: LF: Re: freq: monitor ?? Date: Wed, 27 Jun 2001 19:02:11 +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: F5PNP wrote: > I prepare also a little converter (10.136mhz/136khz), because i think > that with only the FT847 direct on 136khz, and a dipole on 40 m, it 's not > the right way to hear something on this band, or am i wrong ?????? The best test is to see how you receive DBF39 on 138.830kHz. If this is S9+40 or nearly there, your receive set-up is good. If you need more gain, you may find a pre-amp is better than using a converter. 73 and welcome to the band Pascal. Mike, G3XDV http://www.lf.thersgb.net From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 292 invoked from network); 27 Jun 2001 17:35:33 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 27 Jun 2001 17:35:33 -0000 Received: (qmail 23588 invoked from network); 27 Jun 2001 17:35:44 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 27 Jun 2001 17:35:44 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FJ9x-0005Ro-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Jun 2001 18:31:25 +0100 Received: from postfix2-1.free.fr ([213.228.0.9]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15FJ9v-0005Rj-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Jun 2001 18:31:23 +0100 Received: from f5maf (toulouse-1-a7-41-121.dial.proxad.net [213.228.41.121]) by postfix2-1.free.fr (Postfix) with SMTP id 980B8C0C9 for ; Wed, 27 Jun 2001 19:30:35 +0200 (CEST) Message-ID: <002901c0ff2e$fc93d860$7929e4d5@f5maf> From: "f5maf" To: rsgb_lf_group@blacksheep.org References: <005d01c0fe76$e6a457e0$ad2c1bd4@rci> Subject: LF: Re: freq: monitor ?? Date: Wed, 27 Jun 2001 19:30:39 +0200 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: Cher Pascal, C'est une antenne qui fonctionne bien, mais hélas un peu juste pur le sud ouest! Pour ma part il y a 20 metres de perimetre avec un FET VN10. Pour le convertisseur, celui de DF3LP marche tres bien. Mais on peut aussi n'utiliser que la partie preselection. Avantage : la stabilite!. Bonne realisation. Marc F5MAF Toulouse www.qsl.net/f5maf ----- Original Message ----- From: f6kaw radio club d'ivry To: Sent: Tuesday, June 26, 2001 9:32 PM Subject: LF: freq: monitor ?? > From Pascal, F5PNP.... > > I'm a very, very newcomer in the world of LF...I visited a lot of sites > on internet to collect some informations about the activity, and plan to > built the little transmitter from GW4ALG (the marathon...)when i will find > the way to change the 3c85 core by another one...hi !!! ('cause impossible > to find it in FRANCE...).... > I prepare also a little converter (10.136mhz/136khz), because i think > that with only the FT847 direct on 136khz, and a dipole on 40 m, it 's not > the right way to hear something on this band, or am i wrong ?????? > I prepared also a "DF3LP COAX LOOP" to use during my holidays between > july and august in south west FRANCE. > Does anyone use this little antenna wit succes??? (2.20m diameter...).... > Talking about holidays, i think it would be very interesting to have a > decametric frequency to know in real time if somebody is cqing on 136khz, > like the VHF NET on 14340 MHZ....WHY NOT A 136KHZ NET ????...or if this > already exists, witch frequency do i use ?????..... > Another and last question, which may be evident for expert, but not for > me although the photographs.... In a variometer, the coil inside is put in > serie between the two outer coil of the variometer; or we build first the > outer coil, and then, we connect the inside coil in serie to terminal...??? > (i don't know if i'm not a little too complex...!!!! hi!!!)... > please excuse my bad english language....best 73's to all, good dx, and > hope to hear you soon on 136khz...Pascal... > > http://f5pnp@free.fr > radio club mail: http://f6kaw@free.fr > > PS: i'm a member of the radio club of ivry, F6KAW, near PARIS...here is > our web site: http://f6kaw.free.fr/ > hope to be soon qrv on 136 khz !!! > > > > --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.256 / Virus Database: 129 - Release Date: 31/05/01 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20132 invoked from network); 27 Jun 2001 13:10:20 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 27 Jun 2001 13:10:20 -0000 Received: (qmail 8778 invoked from network); 27 Jun 2001 13:09:09 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 27 Jun 2001 13:09:09 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FEyo-0003Ah-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Jun 2001 14:03:38 +0100 X-MSMail-Priority: Normal Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15FEyk-0003Ac-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Jun 2001 14:03:35 +0100 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 PAA1376286 for ; Wed, 27 Jun 2001 15:02:52 +0200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3.0.1.16.20010627140305.21a7b326@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, 27 Jun 2001 14:03:05 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: LF: LF link page In-reply-to: <3B39A2E4.5BBEDD4E@usa.net> References: <005d01c0fe76$e6a457e0$ad2c1bd4@rci> <3B397DCB.F87B6FD3@alg.demon.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: On most 136kHz websites there is a more or less extended link page. Anyone who has his own website will have experienced that a link page needs a lot of maintainance (changing URL's, new websites come, other go), so it occurs to me that there is a lot of avoidable work done. What about the idea that one of us puts a 'complete' link page on his website and the others just put a link to that page ? All changes of URL, new sites etc.. would be needed to be done only once. If the others would keep an eye on it (report broken links and new sites) the amount of work for the 'sitekeeper' would be acceptable. What say ? 73, Rik ON7YD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24451 invoked from network); 27 Jun 2001 12:38:00 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 27 Jun 2001 12:38:00 -0000 Received: (qmail 14203 invoked from network); 27 Jun 2001 12:37:30 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 27 Jun 2001 12:37:30 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FETl-0002uR-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Jun 2001 13:31:33 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from [32.97.182.101] (helo=e1.ny.us.ibm.com) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15FETh-0002tz-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Jun 2001 13:31:29 +0100 Received: from northrelay01.pok.ibm.com (northrelay01.pok.ibm.com [9.117.200.21]) by e1.ny.us.ibm.com (8.9.3/8.9.3) with ESMTP id IAA325302 for ; Wed, 27 Jun 2001 08:27:23 -0400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (ss9.bld.socks.ibm.com [9.14.4.75]) by northrelay01.pok.ibm.com (8.11.1m3/NCO v4.96) with ESMTP id f5RCTAT224252 for ; Wed, 27 Jun 2001 08:29:11 -0400 Message-ID: <3B39D15D.2AA5690D@usa.net> Date: Wed, 27 Jun 2001 14:28:13 +0200 From: "Alberto di Bene" X-Mailer: Mozilla 4.76 [en] (WinNT; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Ham Radio meeting frequencies References: Content-Type: text/html; charset=us-ascii 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, Stewart, Walter,
and everyone planning to go to the Ham Radio Fair in Friedrichshafen.

Some meeting frequencies..  very sorry that 136kHz is not included:
[...]

Hello Wolf,
   unfortunately this week I have non procrastinable job schedules that
do not allow me to take a couple of days off, as I had planned.
So I won't be able to be in Friedrichshafen.. :-(

But Vittorio IK2CZL will, and he told me he will partecipate at
your LF meeting. He speaks also some German, so he will be able
to better interact with you all. He will leave tomorrow Thursday
morning, and will stay there until Sunday morning. He has booked
a room in a gasthaus in Tettnang

I have passed him your message with the meeting frequencies.
He will bring with him a laptop with the all new version of Spectran
and he will demonstrate it to those interested.

Let's hope for the next year....

73  Alberto  I2PHD
  From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24296 invoked from network); 27 Jun 2001 11:49:18 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 27 Jun 2001 11:49:18 -0000 Received: (qmail 6811 invoked from network); 27 Jun 2001 11:48:06 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 27 Jun 2001 11:48:06 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FDh9-0002O3-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Jun 2001 12:41:19 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from imo-d06.mx.aol.com ([205.188.157.38]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15FDgq-0002Kd-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Jun 2001 12:41:01 +0100 Received: from DL4YHF@aol.com by imo-d06.mx.aol.com (mail_out_v30.22.) id l.e2.16b6313e (17385) for ; Wed, 27 Jun 2001 07:39:44 -0400 (EDT) From: DL4YHF@aol.com Message-ID: Date: Wed, 27 Jun 2001 07:39:43 EDT Subject: LF: Ham Radio meeting frequencies To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Mailer: AOL 6.0 for Windows DE sub 217 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit Hello Alberto, Stewart, Walter,
and everyone planning to go to the Ham Radio Fair in Friedrichshafen.

Some meeting frequencies..  very sorry that 136kHz is not included:
  430.025 MHz FM simplex (suggested by Walter, DJ2LF)
  439.475 MHz FM simplex (monitored by myself)
  144.475 MHz FM simplex (to meet KK7KA on 2mtrs)
  
FM repeaters in the area, with output frequency (600kHz shift):
  145.600 MHz, 145.625 MHz, 145.750 MHz,   possibly also on 70cm.
For visitors from outside DL: You need a 1750Hz tone signal to open a
repeater, it will then remain open for some time. I will put out occasional
"CQ LF"-calls on these repeaters in the evenings, if they are not too busy.

Hope to meet you personally after the "official part" of the at the LF
meeting  held by DJ2LF on Saturday, 10:00 local in hall 2, room B.

73   Wolf, DL4YHF. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21119 invoked from network); 27 Jun 2001 09:54:37 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 27 Jun 2001 09:54:37 -0000 Received: (qmail 18707 invoked from network); 27 Jun 2001 09:54:51 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 27 Jun 2001 09:54:51 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FBvS-0001Xj-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Jun 2001 10:47:58 +0100 Received: from protactinium.btinternet.com ([194.73.73.176] helo=protactinium) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15FBvN-0001Xb-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Jun 2001 10:47:54 +0100 Received: from [217.35.36.35] (helo=mud) by protactinium with smtp (Exim 3.22 #9) id 15FBub-00030c-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Jun 2001 10:47:05 +0100 Message-ID: <000601c0feee$ef663ba0$0100a8c0@home> From: "G3YXM" To: rsgb_lf_group@blacksheep.org References: <005d01c0fe76$e6a457e0$ad2c1bd4@rci> <3B397DCB.F87B6FD3@alg.demon.co.uk> Subject: Re: LF: freq: monitor ?? Date: Wed, 27 Jun 2001 10:52:53 +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 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, and welcome Pascal. Pascal, I would recommend building a TX with at least 200W output to begin with. Once you have made a few contacts you can improve the antenna etc. and then try QRP. I think you will be disappointed if you start with only 5W. Steve has been improving his station for years before he tried his QRP experiment and he has the advantage of quite a few stations about 100km away to give reports. Having said that, if you have a computer in the shack, it would be interesting to see how far you could go with QRSS.... On the subject of toroids: I discovered that Arrow electronics had put the price up to about £15 for the 58mm 3C85 cores when I last bought some, so beware the cost of the smaller ones too. I don't know the part numbers for the 3C90 versions. I still have some of the expensive big ones if anyone wants them. 73. Dave G3YXM g3yxm@wireless.org.uk > Hello and welcome to Pascal F5PNP! > > > To Everyone: > Many LFers in Europe and elsewhere have found local companies > that sell 3c85/3c90 ring cores, and I would be happy to update my > web-site with details of companies that sell these ring cores in > small quantities: Please Email me direct with the details! > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7378 invoked from network); 27 Jun 2001 09:19:02 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 27 Jun 2001 09:19:02 -0000 Received: (qmail 17526 invoked from network); 27 Jun 2001 09:18:32 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 27 Jun 2001 09:18:32 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FBMU-0001Bj-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Jun 2001 10:11:50 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from e21.nc.us.ibm.com ([32.97.136.227]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15FBMQ-0001Be-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Jun 2001 10:11:47 +0100 Received: from southrelay01.raleigh.ibm.com (southrelay01.raleigh.ibm.com [9.37.3.208]) by e21.nc.us.ibm.com (8.9.3/8.9.3) with ESMTP id FAA117208 for ; Wed, 27 Jun 2001 05:03:55 -0500 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (ss8.bld.socks.ibm.com [9.14.4.73]) by southrelay01.raleigh.ibm.com (8.11.1m3/NCO v4.96) with ESMTP id f5R9ArO19580 for ; Wed, 27 Jun 2001 05:10:58 -0400 Message-ID: <3B39A2E4.5BBEDD4E@usa.net> Date: Wed, 27 Jun 2001 11:09:56 +0200 From: "Alberto di Bene" 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: freq: monitor ?? References: <005d01c0fe76$e6a457e0$ad2c1bd4@rci> <3B397DCB.F87B6FD3@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: Steve Rawlings wrote: > To Everyone: > Many LFers in Europe and elsewhere have found local companies > that sell 3c85/3c90 ring cores, and I would be happy to update my > web-site with details of companies that sell these ring cores in > small quantities: Please Email me direct with the details! > Barend Hendriksen HF Elektronica BV used to sell Philips ferrite cores with international shipping. Look at : http://www.xs4all.nl/~barendh/Indexeng.htm I have never bought anything from them, so cannot speak about the quality of the service. 73 Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3018 invoked from network); 27 Jun 2001 08:19:40 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 27 Jun 2001 08:19:40 -0000 Received: (qmail 28790 invoked from network); 27 Jun 2001 08:19:12 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 27 Jun 2001 08:19:12 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FAQg-0000fd-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Jun 2001 09:12:06 +0100 X-MSMail-Priority: Normal Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15FAQd-0000fY-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Jun 2001 09:12:03 +0100 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 KAA908400 for ; Wed, 27 Jun 2001 10:11:20 +0200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3.0.1.16.20010627091134.2da7fb40@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, 27 Jun 2001 09:11:34 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: Re: RE: 3 phase ripple In-reply-to: <00a601c0fea5$f2a78e20$6655872c@david> References: <7D653C9C42F5D411A27C00508BF8803D55C512@pdw-mail-r1.dstl.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: >I think your can make 2x1.41x120 = 338 V dc but I don't want to risk >my life by not using a safety transformer! Of course savety is important, but there are other means to get there than just using a safety transformer. Even most of our household equipement runs directly on the mains. The key is to isolate the mains (or any other HV) from the 'touchable' parts of the equipement. For a PA this would mean that is is mounted within a box and that input and output are properly isolated from any HV. As in most cases the output of the PA has a transformer (impedance matching) the antenna out is well isolated. The driver input can either be isolated by another transformer (linear PA) or by an octocoupler (square wave driven class D PA). 73, Rik ON7YD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23657 invoked from network); 27 Jun 2001 08:19:27 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 27 Jun 2001 08:19:27 -0000 Received: (qmail 4342 invoked from network); 27 Jun 2001 08:19:36 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 27 Jun 2001 08:19:36 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15FASE-0000lZ-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Jun 2001 09:13:42 +0100 Received: from lepidachrosite.lion-access.net ([212.19.217.3]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15FASC-0000lU-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Jun 2001 09:13:40 +0100 Received: from w8k3f0 (1Cust219.tnt1.rtm1.nl.uu.net [213.116.96.219]) by lepidachrosite.lion-access.net (I-Lab) with SMTP id 0B819CB0B1 for ; Wed, 27 Jun 2001 08:11:52 +0000 (GMT) Message-ID: <003801c0fee1$ba950940$db6074d5@w8k3f0> From: "Dick Rollema" To: rsgb_lf_group@blacksheep.org References: <005d01c0fe76$e6a457e0$ad2c1bd4@rci> Subject: LF: Newcomer F5PNP Date: Wed, 27 Jun 2001 10:17:35 +0200 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 Pascal, F5PNP wrote: > Talking about holidays, i think it would be very interesting to have > a decametric frequency to know in real time if somebody is cqing on 136khz, > like the VHF NET on 14340 MHZ....WHY NOT A 136KHZ NET ????...or if this > already exists, witch frequency do i use ?????..... Their used to be a LF-net on MF/HF. It started on 80m on Saturday mornings; netcontroller was G4GVC. It later moved to 160m on Sunday evenings and G3YXM took over as netcontrol. Finally the net moved back to 80m on Sunday evenings, still with Dave, G3YXM, in the chair. But interest dropped away and the net died quietly. To all the good advice for Pascal I add buying the "Low frequency experimenters handbook", edited by Peter, G3LDO. It can be bought from RSGB. Make sure to regurlarly download corrections and additions from Peter's website: http://web.ukonline.co.uk/g3ldo 73, Dick, PA0SE From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12450 invoked from network); 27 Jun 2001 06:33:28 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 27 Jun 2001 06:33:28 -0000 Received: (qmail 21230 invoked from network); 27 Jun 2001 06:33:42 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 27 Jun 2001 06:33:42 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15F8n1-0008Sh-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Jun 2001 07:27:03 +0100 X-MSMail-Priority: Normal Received: from finch-post-11.mail.demon.net ([194.217.242.39]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15F8n0-0008Sc-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Jun 2001 07:27:02 +0100 Received: from alg.demon.co.uk ([194.222.171.80]) by finch-post-11.mail.demon.net with esmtp (Exim 2.12 #1) id 15F8mL-0008lu-0B for rsgb_lf_group@blacksheep.org; Wed, 27 Jun 2001 06:26:21 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B397DCB.F87B6FD3@alg.demon.co.uk> Date: Wed, 27 Jun 2001 07:31:39 +0100 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: freq: monitor ?? References: <005d01c0fe76$e6a457e0$ad2c1bd4@rci> 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 and welcome to Pascal F5PNP! I am sure that we were interested to learn of your plans for 136 kHz. During the design of the little 'Marathon' QRP TX, I did try to avoid the use of special ring cores like the 3c85 (or the alternative 3c90 material), but nothing worked as well! You could try using ring cores intended for EMC filters (often coloured yellow/white), but they will be more lossy. To Everyone: Many LFers in Europe and elsewhere have found local companies that sell 3c85/3c90 ring cores, and I would be happy to update my web-site with details of companies that sell these ring cores in small quantities: Please Email me direct with the details! (Pascal, I would be pleased to buy some 3c85 cores and send them to you - please Email me direct with your address.) I think that building a converter for 136 kHz is a good idea. It will work well with the 40 m dipole - but you will need to resonate the antenna using a loading coil. And the converter will need a good bandpass filter before the receive RF stage or mixer. At GW4ALG, I use only small antennas on LF, but I have never needed a pre-amp - the gain in my mixer is enough. The circuit of the receive converter section of my 136 kHz transverter can be seen at: http://www.alg.demon.co.uk/radio/136/transvtr.htm To find out more about building variometers, see: http://www.alg.demon.co.uk/radio/136/ldg_coil.htm > .... In a variometer, the coil inside is put in > serie between the two outer coil of the variometer; or we build first the > outer coil, and then, we connect the inside coil in serie to terminal...??? My preferred wiring configuration for variometers is shown at: http://www.alg.demon.co.uk/radio/136/ldg_coil.htm#mark2 You can build the outer and inner coils separately, and join the coils together later using soldered connections or 'chocolate block' terminal strip. It would be much more fun to experiment on 136 kHz (especially when running QRP) if you had some local OMs also wishing to explore LF. Discovery is much more exciting if it happens as part of a group activity - with everyone sharing ideas, and learning from each other! Perhaps this would make a good club project at F6KAW? Other active stations on 136 kHz are F6CNI and F6BWO. Good luck on 136! Regards to all, Steve GW4ALG From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8163 invoked from network); 27 Jun 2001 06:21:01 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 27 Jun 2001 06:21:01 -0000 Received: (qmail 51 invoked from network); 27 Jun 2001 06:19:50 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 27 Jun 2001 06:19:50 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15F8ZL-0008Ld-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Jun 2001 07:12:55 +0100 Received: from ns3.swh.sk ([192.108.125.37]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15F8ZJ-0008LY-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Jun 2001 07:12:54 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from hermes.swh.sk (hermes [192.108.125.60]) by ns3.swh.sk (8.11.0/8.11.0) with ESMTP id f5R6Ir804510 for ; Wed, 27 Jun 2001 08:18:53 +0200 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 IAA01452 for ; Wed, 27 Jun 2001 08:12:03 +0200 (MET DST) Received: by btss.swh.sk with Internet Mail Service (5.5.2653.19) id ; Wed, 27 Jun 2001 08:12:00 +0200 Message-ID: <29BDD4F529FCD311B631009027357C4E022587A5@btss103a.swh.sk> From: "Gasparik Richard" To: "Rsgb_Lf_Group \(E-mail\)" Subject: LF: SK6DK Date: Wed, 27 Jun 2001 08:11:59 +0200 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) 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... Yesterday I heard SK6DK with nice signal on 136.5kHz. I can't get him with my 300W. Anybody worked him ? 73 de Rich OM2TW From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28052 invoked from network); 27 Jun 2001 03:04:27 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 27 Jun 2001 03:04:27 -0000 Received: (qmail 14921 invoked from network); 27 Jun 2001 03:04:38 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 27 Jun 2001 03:04:38 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15F5Ry-0006hs-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Jun 2001 03:53:06 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from phobos.unica.co.uk ([208.239.240.147]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15F5Rw-0006hn-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Jun 2001 03:53:05 +0100 Received: from [212.70.193.140] (helo=asterix.tee.gr) by phobos.unica.co.uk with esmtp (Exim 3.13 #2) id 15F5RH-00023H-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Jun 2001 22:52:23 -0400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from teeserver.tee.gr (teeserver.tee.gr [212.70.193.130]) by asterix.tee.gr (8.11.4/8.11.4) with ESMTP id f5R2hUT19324 for ; Wed, 27 Jun 2001 05:43:30 +0300 Received: from odin ([212.70.200.43]) by teeserver.tee.gr (Netscape Messaging Server 4.1) with SMTP id GFKI9100.NFT for ; Wed, 27 Jun 2001 05:43:49 +0300 Message-ID: <3.0.2.32.20010626184953.006ee79c@aurora.eexi.gr> X-Sender: sv1xv@aurora.eexi.gr X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.2 (32) Date: Tue, 26 Jun 2001 18:49:53 +0300 To: rsgb_lf_group@blacksheep.org From: "Costas Krallis" Subject: LF: Re: 3 phase ripple In-reply-to: <002d01c0fe51$86b3a4a0$9029f7c2@oemcomputer> References: <7D653C9C42F5D411A27C00508BF8803D55C512@pdw-mail-r1.dstl.gov.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: At 13:49 26/06/2001 +0100, you wrote: >> The RMS value is not really appropriate for this purpose > Point taken. Whatever you do, be verrry careful about insulating things. Taking into account that both DC terminals fo these power supplies are floating at Vo/2 relative to the neutral AC terminal. Costas SV1XV +------------------------------------------------------------+ | Costas Krallis SV1XV * LOC KM18UA | | P.O.Box 3066 * E-Mail: sv1xv@eexi.gr | | GR-10210 Athens * PGP key: 0x3BDBBC34 | | GREECE * http://www.qsl.net/sv1xv/ | | * http://w4u.eexi.gr/~sv1xv/ | +------------------------------------------------------------+ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27688 invoked from network); 27 Jun 2001 02:16:28 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 27 Jun 2001 02:16:28 -0000 Received: (qmail 24996 invoked from network); 27 Jun 2001 02:16:39 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 27 Jun 2001 02:16:39 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15F4nP-0006TT-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 27 Jun 2001 03:11:11 +0100 Received: from tor-smtp4.attcanada.ca ([207.181.101.72] helo=attcanada.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15F4nN-0006TO-00 for rsgb_lf_group@blacksheep.org; Wed, 27 Jun 2001 03:11:09 +0100 Received: from david (ham-on51-161.netcom.ca [142.154.69.9]) by attcanada.ca (8.8.7-s-4/8.8.7) with SMTP id WAA12467 for ; Tue, 26 Jun 2001 22:10:27 -0400 (EDT) Message-ID: <00a601c0fea5$f2a78e20$6655872c@david> From: "Tenty" To: rsgb_lf_group@blacksheep.org References: <7D653C9C42F5D411A27C00508BF8803D55C512@pdw-mail-r1.dstl.gov.uk> Subject: LF: Re: RE: 3 phase ripple Date: Wed, 27 Jun 2001 02:10:24 +0100 Organization: Holland Data and Wireless 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 6.00.2462.0000 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 have 120 V, not 110 V.. Normal houses don't have 3 phases here as we have a very old fashion electricity system...:=( Every standard house here has 120 and 240 V (two phases)... 120 V (+90 degrees) <------------ 0 (neutral) --------------> 120 V (-90 degrees) So 180 degree difference The 240 V is for our electric ranges ..and maybe a linear :=) Only factories (in an industrial area) and large buildings have 3 phases Some small factories outside the cities convert from two to three phases to run their machines on.. I think your can make 2x1.41x120 = 338 V dc but I don't want to risk my life by not using a safety transformer! Was I confused when I arrived here :=) Bob, ve3tok >However, US and Canadian stations with their 110V mains (supplied as >effectively 6 phases - 3 phase with plus / minus each plus centre tap / >ground, seven wires in total, if I understand it correctly based on looking >at pictures of power cables in US towns) would result in a 270 V rail so, >much more realistic and safe using low cost 500V devices. >Andy G4JNT > -----Original Message----- > From: John Rabson [mailto:word.factory@zetnet.co.uk] > Sent: 2001-06-25 19:05 > To: rsgb_lf_group@blacksheep.org > Subject: LF: 3 phase ripple (was Re: Re: RE: LX1PD) > > > Sorry, I meant rms. > > For a 3 phase full wave bridge > > RMS ripple/mean OP = 4.2% > > (Ref Data for Radio Engs 5th ed p 13-5) > > 73 de > John Rabson G3PAI > > > -- 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 15217 invoked from network); 26 Jun 2001 22:55:11 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 26 Jun 2001 22:55:11 -0000 Received: (qmail 17628 invoked from network); 26 Jun 2001 22:55:25 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 26 Jun 2001 22:55:25 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15F1ex-0004mu-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Jun 2001 23:50:15 +0100 Received: from protactinium.btinternet.com ([194.73.73.176] helo=protactinium) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15F1ew-0004mp-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Jun 2001 23:50:14 +0100 Received: from [62.7.24.172] (helo=default) by protactinium with smtp (Exim 3.22 #9) id 15F1eH-0001mU-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Jun 2001 23:49:33 +0100 Message-ID: <002901c0fe92$0f0d8b00$ac18073e@default> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: freq: monitor ?? Date: Tue, 26 Jun 2001 23:44:13 +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 Pascal I am sure you will get lots of answers to your question so I will reply to you directly. The secret of 136 operation is in the antenna. Most particularly in reducing the ground loss to as low as possible. Your 40m dipole with the feeders strapped and then fed via a loading coil and variometer should work ok. You will need some work on grounding (earthing....such as counterpoise or buried earth wires) just like for an HF vertical but it is even more important to good signals on 136kHz. Often receiving is the most difficult to solve. Many receivers are insensitive on 136kHz. You should be able to hear the idle tone of the German utility Station DCF39 on 138.830kHz at about 20db over S9 (or about 500uV at the input from the antenna) if you system is working properly Please remember that Steve has been active for about 3 years on LF and has optimised his antenna system, but his maximum distance on the 'Marathon' was about 100miles (160kms) In France you do not have many active stations so you may not be within range of a qso with only 5watts. I would suggest you should think of at least 50watts, which is fairly easy to generate. In the early stages as you optimise your antenna and tuning you may find QRSS operation usefull. It is very much easier to copy in the summer when the band is full of static. 3 second 'dot-length' QRS can be copied on a computer DSP with a 0.3Hz filter bandwidth at about 20dB lower level than audible morse-code. Steve's transmitter has it's uses also for antenna experiments, and measurements, and is fun if there are stations in range you can work. Like QRP on other bands, it may not be the easiest way to start making qsos on 136kHz. I recommend you look at Rik's web site (I am sure you already have done this) he has a very good 'tutorial' on antennas and also on DSP reception. www.qsl.net/on7yd There is no coordinating frequency on HF for 136. Activity levels are low at the moment, but most announcements of activity are made on this reflector, also there is some information via the DX Cluster. My local DX Cluster distributes 'spots' right across Europe. Some Cluster software allows the frequenciy to be entered correctly ( 136.5 ) some older software only allows the 'spots' to be entered at 1800.0 with the detail in the comment field, so look at both if you decide to use the DX Cluster. Best activity times are Saturday and Sunday mornings. It was thought that the best time was early when the noise was low. My propagation studies are showing that this may not be so. The quietness may be due to a collapse of the propagation at dawn. Signals are usually quite good from 0700z until 1200z. Whilst loop antennas may be usefull for a noisy location, or if you have strong qrm. There is a general agreement amongst the UK amateurs that a good wire antenna will give a better signal to noise on a very weak signal that a loop. It is difficult to retain enthusiasm when you are struggling alone with a band like 136kHz. Please use the reflector as a 'club' and ask for help when you need it. There is a lot of experienced operators reading the mail here, who are available to help you. Dont worry about your English....you would probably not understand my French at all !! I am available most of the day and listening most days. Please try to give us about 24hours notice of your activity period and I am sure there will be stations looking for you. 73 de Alan G3NYK Alan.Melia@btinternet.com -----Original Message----- From: f6kaw radio club d'ivry To: rsgb_lf_group@blacksheep.org Date: 26 June 2001 20:25 Subject: LF: freq: monitor ?? >>>From Pascal, F5PNP.... > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12534 invoked from network); 26 Jun 2001 22:38:26 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 26 Jun 2001 22:38:26 -0000 Received: (qmail 7260 invoked from network); 26 Jun 2001 22:38:40 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 26 Jun 2001 22:38:40 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15F1Oo-0004f4-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Jun 2001 23:33:34 +0100 Received: from tvout.mail.uk.easynet.net ([194.6.96.5]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15F1On-0004ez-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Jun 2001 23:33:33 +0100 Received: from ericadodd (tnt-13-238.easynet.co.uk [212.134.22.238]) by tvout.mail.uk.easynet.net (Postfix) with SMTP id 7394062FC1 for ; Tue, 26 Jun 2001 23:30:51 +0100 (BST) Message-ID: <000701c0fe90$80249240$ee1686d4@ericadodd> From: "g3ldo" To: rsgb_lf_group@blacksheep.org References: <000701c0fd9e$a89b8b40$d929f7c2@oemcomputer> Subject: LF: Re: LF reference website Date: Tue, 26 Jun 2001 23:35:17 +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 5.50.4522.1200 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 John, > I am updating the Cave Radio & Electronics Group website at > http://www.bcra.org.uk/creg/ > and would like to include a link to a site which deals with conventional (!) > LF amateur radio. May I have your suggestions please? In addition to the sites that have already been suggested, you might find mine of interest. It includes Addendum and Errata to 'The LF Experimenters Handbook" . In addition there is a synopsis of material that has appeared on the LF reflector in the past. It has not been updated for a couple of months but I hope to remedy this soon. Regards, Peter, G3LDO e-mail Web From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3493 invoked from network); 26 Jun 2001 20:44:49 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 26 Jun 2001 20:44:49 -0000 Received: (qmail 9642 invoked from network); 26 Jun 2001 20:43:38 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 26 Jun 2001 20:43:38 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Eza8-0003hW-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Jun 2001 21:37:08 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from mailout02.sul.t-online.com ([194.25.134.17] helo=mailout02.sul.t-online.de) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Eza6-0003hQ-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Jun 2001 21:37:07 +0100 Received: from fwd00.sul.t-online.de by mailout02.sul.t-online.de with smtp id 15EzZO-00033M-06; Tue, 26 Jun 2001 22:36:22 +0200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from (0482183881-0001@[193.159.25.231]) by fwd00.sul.t-online.com with smtp id 15EzZC-1UzYRMC; Tue, 26 Jun 2001 22:36:10 +0200 From: "jannsen" <0482183881-0001@t-online.de> To: rsgb_lf_group@blacksheep.org References: <3B3882DB.22709.BD1883@localhost> Subject: Re: LF: Loop antenna by DF3LP... 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: Tue, 26 Jun 2001 22:36:10 +0200 Message-ID: <15EzZC-1UzYRMC@fwd00.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: Mike Dennison schrieb: > > I built Peters loop but changed it in four steps. at the end it was a uge > > copper-pipe rotary octaeder 15,2 m round. 4,6 to 5,0 m in diam. > > Uwe, > > I have looked at your web site and can see the loop antenna but I would like > to > know how you match it to coax or a pre-amp. Can you help? > > Your antenna farm looks good, my 18m long antenna will fit into a small space > in your garden. > > 73 > > > Mike, G3XDV (IO91VT) > http://www.lf.thersgb.net > Hi Mike es all, yes I can help. pse look up Peters site: www.qsl.net/df3lp/137kHz/rx-loop.html. the simple pre-amp works vy good, no IMs. instead of the power supply via coax I do use an accu. matching the loop by inserting a wire of 3/4 to 1/2 length of the loop round (find the 50 ohm point by try and error) proposed on this reflector did not satisfy: the sensitivity has gone (but the nulls were some what sharper). regards Uwe/dj8wx From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21190 invoked from network); 26 Jun 2001 19:28:56 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 26 Jun 2001 19:28:56 -0000 Received: (qmail 27398 invoked from network); 26 Jun 2001 19:29:10 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 26 Jun 2001 19:29:10 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15EyRt-000374-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Jun 2001 20:24:33 +0100 Received: from postfix2-1.free.fr ([213.228.0.9]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15EyRq-00036z-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Jun 2001 20:24:30 +0100 Received: from rci (nas-cbv-5-44-173.dial.proxad.net [212.27.44.173]) by postfix2-1.free.fr (Postfix) with SMTP id 1E569C275 for ; Tue, 26 Jun 2001 21:23:47 +0200 (CEST) Message-ID: <005d01c0fe76$e6a457e0$ad2c1bd4@rci> From: "f6kaw radio club d'ivry" To: rsgb_lf_group@blacksheep.org Subject: LF: freq: monitor ?? Date: Tue, 26 Jun 2001 21:32:52 +0200 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: >From Pascal, F5PNP.... I'm a very, very newcomer in the world of LF...I visited a lot of sites on internet to collect some informations about the activity, and plan to built the little transmitter from GW4ALG (the marathon...)when i will find the way to change the 3c85 core by another one...hi !!! ('cause impossible to find it in FRANCE...).... I prepare also a little converter (10.136mhz/136khz), because i think that with only the FT847 direct on 136khz, and a dipole on 40 m, it 's not the right way to hear something on this band, or am i wrong ?????? I prepared also a "DF3LP COAX LOOP" to use during my holidays between july and august in south west FRANCE. Does anyone use this little antenna wit succes??? (2.20m diameter...).... Talking about holidays, i think it would be very interesting to have a decametric frequency to know in real time if somebody is cqing on 136khz, like the VHF NET on 14340 MHZ....WHY NOT A 136KHZ NET ????...or if this already exists, witch frequency do i use ?????..... Another and last question, which may be evident for expert, but not for me although the photographs.... In a variometer, the coil inside is put in serie between the two outer coil of the variometer; or we build first the outer coil, and then, we connect the inside coil in serie to terminal...??? (i don't know if i'm not a little too complex...!!!! hi!!!)... please excuse my bad english language....best 73's to all, good dx, and hope to hear you soon on 136khz...Pascal... http://f5pnp@free.fr radio club mail: http://f6kaw@free.fr PS: i'm a member of the radio club of ivry, F6KAW, near PARIS...here is our web site: http://f6kaw.free.fr/ hope to be soon qrv on 136 khz !!! From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6285 invoked from network); 26 Jun 2001 17:55:04 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 26 Jun 2001 17:55:04 -0000 Received: (qmail 20653 invoked from network); 26 Jun 2001 17:55:15 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 26 Jun 2001 17:55:15 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15EwyM-0002HT-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Jun 2001 18:49:58 +0100 Received: from riker.skynet.be ([195.238.3.132]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15EwyJ-0002HO-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Jun 2001 18:49:55 +0100 Received: from mh70i ([62.4.222.172]) by riker.skynet.be (8.11.2/8.11.2/Skynet-OUT-2.11) with SMTP id f5QHnCO13550 for ; Tue, 26 Jun 2001 19:49:12 +0200 (MET DST) (envelope-from ) Message-ID: <000b01c0fe68$7a4574c0$acde043e@mh70i> From: "DE BONDT WERNER" To: rsgb_lf_group@blacksheep.org Subject: LF: LX1PD Date: Tue, 26 Jun 2001 19:50:23 +0200 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
 
Very nice to hear LX1PD is on the LW again.
On 6 Sept 1998 18,50 UTC We made first ON - LX  Jules was 5-9-9   and give me 4-5-9 QRM
2nd QSO on 22 November 10, 45 UTC Jules still 5-5-9 my sig. 4-4-9  lot of QRN.
Vy friendly OM with a lot of info abt equipment . Power was 1000w with 8+8 pl36 in push-pull .
Hope to suagn Jules.
 
MNI  73  to all ON6ND Werner
 
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13560 invoked from network); 26 Jun 2001 15:52:10 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 26 Jun 2001 15:52:10 -0000 Received: (qmail 10578 invoked from network); 26 Jun 2001 15:51:02 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 26 Jun 2001 15:51:02 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Ev2U-0001Q3-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Jun 2001 16:46:06 +0100 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 #2) id 15Ev2S-0001Py-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Jun 2001 16:46:05 +0100 Received: from miked by rsgb.org.uk with SMTP (MDaemon.PRO.v4.0.0.R) for ; Tue, 26 Jun 2001 16:42:59 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Tue, 26 Jun 2001 16:42:56 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: LF reference website Message-ID: <3B38BB90.14514.19A9B71@localhost> In-reply-to: <000701c0fd9e$a89b8b40$d929f7c2@oemcomputer> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-Return-Path: miked@mail X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > I am updating the Cave Radio & Electronics Group website at > http://www.bcra.org.uk/creg/ > and would like to include a link to a site which deals with conventional (!) LF > amateur radio. May I have your suggestions please? > John Rabson G3PAI The ones I use most often are: G3YXM http://www.wireless.org.uk GW4ALG http://www.alg.demon.co.uk/radio/136/intro.htm DK8KW http://www.qru.de/ and of course G3XDV http://www.lf.thersgb.net 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 12722 invoked from network); 26 Jun 2001 15:17:36 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 26 Jun 2001 15:17:36 -0000 Received: (qmail 15217 invoked from network); 26 Jun 2001 15:17:47 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 26 Jun 2001 15:17:47 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15EuSE-00013q-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Jun 2001 16:08:38 +0100 Received: from irwell.zetnet.co.uk ([194.247.47.48] helo=zetnet.co.uk ident=root) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15EuSA-00013j-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Jun 2001 16:08:35 +0100 Received: from oemcomputer (man-s017.dialup.zetnet.co.uk [194.247.41.144]) by zetnet.co.uk (8.11.3/8.11.3/Debian 8.11.2-1) with SMTP id f5QF7qI06588 for ; Tue, 26 Jun 2001 16:07:53 +0100 Message-ID: <002d01c0fe51$86b3a4a0$9029f7c2@oemcomputer> From: "John Rabson" To: rsgb_lf_group@blacksheep.org References: <7D653C9C42F5D411A27C00508BF8803D55C512@pdw-mail-r1.dstl.gov.uk> Subject: LF: Re: RE: 3 phase ripple Date: Tue, 26 Jun 2001 13:49:48 +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: ----- Original Message ----- From: "Talbot Andrew" To: Sent: Tuesday, June 26, 2001 10:15 AM Subject: LF: RE: 3 phase ripple > The RMS value is not really appropriate for this purpose Point taken. Whatever you do, be verrry careful about insulating things. John From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16226 invoked from network); 26 Jun 2001 12:20:35 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 26 Jun 2001 12:20:35 -0000 Received: (qmail 15341 invoked from network); 26 Jun 2001 12:19:27 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 26 Jun 2001 12:19:27 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15ErkY-0008EM-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Jun 2001 13:15:22 +0100 Received: from lepidachrosite.lion-access.net ([212.19.217.3]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15ErkX-0008EH-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Jun 2001 13:15:22 +0100 Received: from w8k3f0 (Toetanchamon.Leaders.dialin.freeler.nl [212.26.212.207]) by lepidachrosite.lion-access.net (I-Lab) with SMTP id AEC77CAEE1 for ; Tue, 26 Jun 2001 12:13:30 +0000 (GMT) Message-ID: <003301c0fe3a$50849b80$8cd91ad4@w8k3f0> From: "Dick Rollema" To: rsgb_lf_group@blacksheep.org References: <7D653C9C42F5D411A27C00508BF8803D55C512@pdw-mail-r1.dstl.gov.uk> Subject: LF: Re: RE: 3 phase ripple Date: Tue, 26 Jun 2001 14:19:03 +0200 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 Andy, G4JNT, wrote: > Using the standard mean UK supply of 234V rms nominal (405V phase voltage, > peak = 573V) the rectified supply would be 573 volts max, so my earlier > statement that 600V FETs could be used was of course rubbish, as the margin > is much too low. Apparantly those vacuum FETs used by LX1PD is not such a bad idea .... 73, Dick, PA0SE From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25222 invoked from network); 26 Jun 2001 12:08:42 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 26 Jun 2001 12:08:42 -0000 Received: (qmail 6167 invoked from network); 26 Jun 2001 12:07:34 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 26 Jun 2001 12:07:34 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15ErWx-000872-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Jun 2001 13:01:19 +0100 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 #2) id 15ErWt-00086x-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Jun 2001 13:01:15 +0100 Received: from miked by rsgb.org.uk with SMTP (MDaemon.PRO.v4.0.0.R) for ; Tue, 26 Jun 2001 12:53:11 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Tue, 26 Jun 2001 12:53:08 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: Weekend activity Message-ID: <3B3885B4.32285.C83815@localhost> In-reply-to: <29BDD4F529FCD311B631009027357C4E0225879B@btss103a.swh.sk> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-Return-Path: miked@mail X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > I was surprised that the QRN on 136kHz was very low this weekend, > but the activity too. I spent a lot of hours on CW and QRSS, but no trace > (except I5TGC on QRSS). That's all. The only interesting QSOs I did on 2m > via sporadic E with UA3 stations...well, better to stay on higher bands at > this time of year... > 73 and enjoy LF...de Rich OM2TW I was active on QRSS over the weekend, so sorry to have missed Rich. We had very hot and sunny Wx in the UK so I think most hams were in the garden or at the seaside. As has been reported, I called LX1PD several times with no success. It is difficult to see what else I can do to make my signal strong enough for him to hear me. LX is one of the very few countries I need for the full set. 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 13653 invoked from network); 26 Jun 2001 09:46:18 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 26 Jun 2001 09:46:18 -0000 Received: (qmail 22705 invoked from network); 26 Jun 2001 09:45:51 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 26 Jun 2001 09:45:51 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Ep1g-0006ms-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Jun 2001 10:20:52 +0100 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Ep1W-0006mn-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Jun 2001 10:20:42 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id KAA22972; Tue, 26 Jun 2001 10:25:04 +0100 (BST) Received: (qmail 30215 invoked from network); 26 Jun 2001 10:12:47 -0000 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 26 Jun 2001 10:12:47 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: by gauntlet.mail.dera.gov.uk; id KAA29617; Tue, 26 Jun 2001 10:03:20 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma028615; Tue, 26 Jun 01 10:00:50 GMT Received: from mailex.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with SMTP id for ; Tue, 26 Jun 2001 10:14:24 +0100 Received: (qmail 24801 invoked from network); 26 Jun 2001 09:05:58 +0100 Received: from softdnserror (HELO cchecker.dstl.gov.uk) (192.168.248.52) by mailex.dstl.gov.uk with SMTP; 26 Jun 2001 08:05:58 -0000 Received: from FRN-MAIL-R1.dstl.gov.uk (unverified) by cchecker.dstl.gov.uk (Content Technologies SMTPRS 4.1.2) with ESMTP id for ; Tue, 26 Jun 2001 09:06:14 +0100 Received: by frn-mail-r1.dstl.gov.uk with Internet Mail Service (5.5.2650.21) id ; Tue, 26 Jun 2001 10:15:09 +0100 Message-ID: <7D653C9C42F5D411A27C00508BF8803D55C512@pdw-mail-r1.dstl.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: 3 phase ripple Date: Tue, 26 Jun 2001 10:15:10 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) 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: John et al - Consulted the reference you gave (page 14-4 in the 6th edition) and can see where the figure comes from. The value of 4.2% quoted is, as you said, the RMS value of the ripple / mean output voltage. The RMS value is not really appropriate for this purpose and in fact is rather meaningless; ie. providing a DC supply to a PA. The circuits in the book assumes a series DC choke - something the heavy electrical people would use routinely but unnecessary for our purposes. The actual instantaneous value of the full wave rectified waveform using the 6 diode equivalent of a bridge rectifier, (no connection to the star point) is as follows : Minimum value is 1.5 Vpk at the crest of one phase, current returning to the other two phases at their 30 degree points, at amplitude -0.5. Maximum voltage is at the 60 degree point of two phases, where the respective amplitudes are SQRT(3) / 2 Vpk and -SQRT(3) / 2 giving 1.732 Vpk. The third phase has a value of 0 here. Hence max possible ripple is 1.732 - 1.5 = 0.232 Vpk, pk-pk having a fullwave rectified shape at 300Hz. Mean output voltage is obtained by integrating over this 1.5 to 1.732 waveform, giving 1.65 Vpk, and a Peak / Mean ratio of the 1.05 quoted in the Data Book. Can't be bothered calculating the RMS ripple value as it is of little value, (and is complicated to do) but it looks as if a figure of 4.2% would be in the right sort of region. If using a capacitive PSU input, the unloaded voltage would just be Vpk, and ripple would be determined by capacitance and load current, but now at 300Hz prf meaning lower values caps. Using the standard mean UK supply of 234V rms nominal (405V phase voltage, peak = 573V) the rectified supply would be 573 volts max, so my earlier statement that 600V FETs could be used was of course rubbish, as the margin is much too low. (Unless using a half wave rectified supply giving the same 340V as available from a single phase + neutral supply, with 150Hz ripple frequency - not a good idea) 800 - 1000v FETs are only just beginning to appear and are very expensive compared with 500V devices, so the idea of using full wave rectified 3 phase supply for a mosfet PA is definitely not on. However, US and Canadian stations with their 110V mains (supplied as effectively 6 phases - 3 phase with plus / minus each plus centre tap / ground, seven wires in total, if I understand it correctly based on looking at pictures of power cables in US towns) would result in a 270 V rail so, much more realistic and safe using low cost 500V devices. Andy G4JNT > -----Original Message----- > From: John Rabson [mailto:word.factory@zetnet.co.uk] > Sent: 2001-06-25 19:05 > To: rsgb_lf_group@blacksheep.org > Subject: LF: 3 phase ripple (was Re: Re: RE: LX1PD) > > > Sorry, I meant rms. > > For a 3 phase full wave bridge > > RMS ripple/mean OP = 4.2% > > (Ref Data for Radio Engs 5th ed p 13-5) > > 73 de > John Rabson G3PAI > > > -- 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 12029 invoked from network); 26 Jun 2001 08:29:04 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 26 Jun 2001 08:29:04 -0000 Received: (qmail 9630 invoked from network); 26 Jun 2001 08:28:38 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 26 Jun 2001 08:28:38 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Eo7s-0006Ib-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Jun 2001 09:23:12 +0100 Received: from irwell.zetnet.co.uk ([194.247.47.48] helo=zetnet.co.uk ident=root) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Eo7o-0006IW-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Jun 2001 09:23:08 +0100 Received: from oemcomputer (man-s312.dialup.zetnet.co.uk [194.247.45.183]) by zetnet.co.uk (8.11.3/8.11.3/Debian 8.11.2-1) with SMTP id f5Q8MQF06556 for ; Tue, 26 Jun 2001 09:22:26 +0100 Message-ID: <000301c0fe18$e5a8f7a0$b72df7c2@oemcomputer> From: "John Rabson" To: rsgb_lf_group@blacksheep.org References: Subject: LF: Re: Re: LF Reference website Date: Tue, 26 Jun 2001 09:14:48 +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: Hello Wolf, Thank you for your suggestions. I shall add them to the new site. >Looks as if I should add your site to my favorite links too, as I am very >interested in cave radio (being on of those "earth worms" myself :-) Do you get the CREG Journal? See 'Publications' on the current site, or E-mail Rob Gill, G8DSU on creg@bcra.org.uk 73 de John Rabson G3PAI From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29207 invoked from network); 26 Jun 2001 07:36:09 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 26 Jun 2001 07:36:09 -0000 Received: (qmail 25702 invoked from network); 26 Jun 2001 07:35:39 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 26 Jun 2001 07:35:39 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15EnHi-0005ul-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 26 Jun 2001 08:29:18 +0100 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15EnHh-0005ug-00 for rsgb_lf_group@blacksheep.org; Tue, 26 Jun 2001 08:29:17 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id IAA32522; Tue, 26 Jun 2001 08:33:38 +0100 (BST) Received: (qmail 17475 invoked from network); 26 Jun 2001 08:21:22 -0000 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 26 Jun 2001 08:21:22 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: by gauntlet.mail.dera.gov.uk; id IAA15400; Tue, 26 Jun 2001 08:11:57 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma015372; Tue, 26 Jun 01 08:11:35 GMT Received: from mailex.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with SMTP id for ; Tue, 26 Jun 2001 08:37:43 +0100 Received: (qmail 27190 invoked from network); 26 Jun 2001 07:18:14 +0100 Received: from softdnserror (HELO cchecker.dstl.gov.uk) (192.168.248.52) by mailex.dstl.gov.uk with SMTP; 26 Jun 2001 06:18:14 -0000 Received: from FRN-MAIL-R1.dstl.gov.uk (unverified) by cchecker.dstl.gov.uk (Content Technologies SMTPRS 4.1.2) with ESMTP id for ; Tue, 26 Jun 2001 07:18:30 +0100 Received: by frn-mail-r1.dstl.gov.uk with Internet Mail Service (5.5.2650.21) id ; Tue, 26 Jun 2001 08:27:25 +0100 Message-ID: <7D653C9C42F5D411A27C00508BF8803D55C510@pdw-mail-r1.dstl.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: 3 phase ripple Date: Tue, 26 Jun 2001 08:27:24 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) 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: Think I'm going to spend some time looking at rectified 3 phase waveforms - can't just accept a something until I know exactly why and can derive it from first principles. : The engineering mentality :-) Andy G4JNT > -----Original Message----- > From: John Rabson [mailto:word.factory@zetnet.co.uk] > Sent: 2001-06-25 19:05 > To: rsgb_lf_group@blacksheep.org > Subject: LF: 3 phase ripple (was Re: Re: RE: LX1PD) > > > Sorry, I meant rms. > > For a 3 phase full wave bridge > > RMS ripple/mean OP = 4.2% > > (Ref Data for Radio Engs 5th ed p 13-5) > > 73 de > John Rabson G3PAI > > > -- 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 11176 invoked from network); 25 Jun 2001 22:18:55 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 25 Jun 2001 22:18:55 -0000 Received: (qmail 20900 invoked from network); 25 Jun 2001 18:12:19 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 25 Jun 2001 18:12:19 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15EamM-00089P-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Jun 2001 19:08:06 +0100 Received: from irwell.zetnet.co.uk ([194.247.47.48] helo=zetnet.co.uk ident=root) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15EamL-00089K-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Jun 2001 19:08:05 +0100 Received: from oemcomputer (man-s352.dialup.zetnet.co.uk [194.247.45.223]) by zetnet.co.uk (8.11.3/8.11.3/Debian 8.11.2-1) with SMTP id f5PI7Lw22706 for ; Mon, 25 Jun 2001 19:07:22 +0100 Message-ID: <000801c0fda1$75ee7e20$df2df7c2@oemcomputer> From: "John Rabson" To: rsgb_lf_group@blacksheep.org References: <000e01c0fd9b$ac246b40$8d9401d4@g4jnt> Subject: LF: 3 phase ripple (was Re: Re: RE: LX1PD) Date: Mon, 25 Jun 2001 19:05:05 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2919.6600 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Sorry, I meant rms. For a 3 phase full wave bridge RMS ripple/mean OP = 4.2% (Ref Data for Radio Engs 5th ed p 13-5) 73 de John Rabson G3PAI From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15284 invoked from network); 25 Jun 2001 22:05:47 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 25 Jun 2001 22:05:47 -0000 Received: (qmail 26817 invoked from network); 25 Jun 2001 17:43:27 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 25 Jun 2001 17:43:27 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15EaE5-0007tM-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Jun 2001 18:32:41 +0100 Received: from smtp-1.visp.telinco.net ([212.1.130.1]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15EaE1-0007tH-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Jun 2001 18:32:37 +0100 Received: from [212.1.148.141] (helo=g4jnt) by smtp-1.visp.telinco.net with smtp (Exim 3.22 #1) id 15EZwN-0003LQ-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Jun 2001 18:14:23 +0100 Message-ID: <000e01c0fd9b$ac246b40$8d9401d4@g4jnt> From: "Andrew Talbot" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Re: RE: LX1PD Date: Mon, 25 Jun 2001 18:24:20 +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 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: Why ? I did look at this, and came to the conculsion : Peak of one cycle falling to the 60 degree point, SIN(60) = 0.866. So ripple = 1 - 0.866 = .134 hence 13.4% I did hear once that some high power transmitters do not use decoupling caps in their PSUs, and if the 3-phase ripple is only 4% that may explain how they can get away with it. Andy - off to have a look at a textbook on heavy electrical power engineering. -----Original Message----- From: John Rabson To: rsgb_lf_group@blacksheep.org Date: 25 June 2001 16:22 Subject: LF: Re: RE: LX1PD >I think its 4%! > >73 de >John Rabson G3PAI > >----- Original Message ----- >From: "Talbot Andrew" >To: >Sent: Monday, June 25, 2001 2:03 PM >Subject: LF: RE: LX1PD > > >> That's set me thinking evil thoughts ....... >> >> 600V Mosfets in bridge. 3 phase rectifier giving 13% ripple even without >> any decoupling caps, at a ripple freq of 300Hz. 10kW perhaps ! >> >> Andy G4JNT >> >> >> > voltage comes from six-phase rectification of the >> > 220/380V mains >> > without a transformer. >> > >> > >> >> >> -- >> 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 15099 invoked from network); 25 Jun 2001 18:37:06 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 25 Jun 2001 18:37:06 -0000 Received: (qmail 2245 invoked from network); 25 Jun 2001 15:08:41 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 25 Jun 2001 15:08:41 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15EXnu-0006cz-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Jun 2001 15:57:30 +0100 Received: from [204.202.140.198] (helo=webmailmta.go.com) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15EXnp-0006cu-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Jun 2001 15:57:26 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gomailjtp01 ([10.212.0.161]) by mta06.seamail.go.com (Sun Internet Mail Server sims.4.0.2000.10.12.16.25.p8) with ESMTP id <0GFH00MDSQTBVK@mta06.seamail.go.com> for rsgb_lf_group@blacksheep.org; Mon, 25 Jun 2001 07:55:59 -0700 (PDT) Date: Mon, 25 Jun 2001 07:56:01 -0700 (PDT) From: "John Sexton" Subject: Re: LF: LX1PD To: rsgb_lf_group@blacksheep.org Message-ID: <5154751.993480961701.JavaMail.computernetworks@gomailjtp01> MIME-Version: 1.0 X-Mailer: GoMail 3.0.0 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: Thanks Dick, That sounds like an interesting station. Perhaps he needs a different type of antenna for receive? John, G4CNN -----Original Message----- From: "Dick Rollema" To: rsgb_lf_group@blacksheep.org Date: Mon Jun 25 05:00:08 PDT 2001 Subject: LF: LX1PD >To All from PA0SE> >John, G4CNN, wrote: > >> A good strong signal from LX1PD this afternoon. This is the first time I >have heard him. >> Heard Mike XDV calling him later, but with no success. >> If you are on the Reflector, please tell us a bit about your setup. Dont >know the name, sri. > >Jules is not on the reflector I think. >He must be one of the first, if not THE first, continental station on 136kHz >with a signal that could be heard all over Europe. >I worked him 14 March 1999. He has send me QSL, circuit diagram and >photographs via mail. > >LX1PD uses a beatifully looking valve transmitter with 8 pentodes PL36 >parallel-pushpull in the final. >Output 1.2kW. >The anode voltage comes from six-phase rectification of the 220/380V mains >without a transformer. > >L-type aerial of 200ft, base loaded. > >Receivers DrakeR7A and JPS NIR 12 DSP. Jules suffers from a high local noise >level so his reception is not too good. > >Jules Braun lives at Hesperange in Luxemburg, JN39BN. > >73, Dick, PA0SE >JO22GD > > ___________________________________________________ GO.com Mail Get Your Free, Private E-mail at http://mail.go.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27121 invoked from network); 25 Jun 2001 18:14:01 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 25 Jun 2001 18:14:01 -0000 Received: (qmail 16364 invoked from network); 25 Jun 2001 18:12:59 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 25 Jun 2001 18:12:59 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15EanV-00089W-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Jun 2001 19:09:17 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from imo-d02.mx.aol.com ([205.188.157.34]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15EanT-00089R-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Jun 2001 19:09:16 +0100 Received: from DL4YHF@aol.com by imo-d02.mx.aol.com (mail_out_v30.22.) id l.f3.c036272 (3700) for ; Mon, 25 Jun 2001 14:07:57 -0400 (EDT) From: DL4YHF@aol.com Message-ID: Date: Mon, 25 Jun 2001 14:07:56 EDT Subject: LF: Re: LF Reference website To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Mailer: AOL 6.0 for Windows DE sub 217 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit Hi John,

I would suggest Dave G3YXM's website, because his site has a well maintained
link list to all other LF sites, including Steve, Peter and all the others.

Copied and pasted from my favorite LF links:

GW4ALG's homepage
G3YXM's homepage
DK8KW's LF homepage
ON7YD's homepage  

Looks as if I should add your site to my favorite links too, as I am very
interested in cave radio (being on of those "earth worms" myself :-)

73 Wolf.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18661 invoked from network); 25 Jun 2001 17:51:46 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 25 Jun 2001 17:51:46 -0000 Received: (qmail 15614 invoked from network); 25 Jun 2001 17:51:58 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 25 Jun 2001 17:51:58 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15EaSv-00080I-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Jun 2001 18:48:01 +0100 Received: from irwell.zetnet.co.uk ([194.247.47.48] helo=zetnet.co.uk ident=root) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15EaSu-00080D-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Jun 2001 18:48:00 +0100 Received: from oemcomputer (man-s090.dialup.zetnet.co.uk [194.247.41.217]) by zetnet.co.uk (8.11.3/8.11.3/Debian 8.11.2-1) with SMTP id f5PHlIw19148 for ; Mon, 25 Jun 2001 18:47:18 +0100 Message-ID: <000701c0fd9e$a89b8b40$d929f7c2@oemcomputer> From: "John Rabson" To: rsgb_lf_group@blacksheep.org Subject: LF: LF reference website Date: Mon, 25 Jun 2001 18:44:43 +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 5.00.2919.6600 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: I am updating the Cave Radio & Electronics Group website at http://www.bcra.org.uk/creg/ and would like to include a link to a site which deals with conventional (!) LF amateur radio. May I have your suggestions please? 73 de John Rabson G3PAI From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24915 invoked from network); 25 Jun 2001 16:03:13 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 25 Jun 2001 16:03:13 -0000 Received: (qmail 15047 invoked from network); 25 Jun 2001 14:38:10 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 25 Jun 2001 14:38:10 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15EXMr-0006OB-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Jun 2001 15:29:33 +0100 Received: from jubilee.ns.sympatico.ca ([142.177.1.6] helo=mail-ns00s0.ns.sympatico.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15EXMW-0006O3-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Jun 2001 15:29:12 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.98.42]) by mail-ns00s0.ns.sympatico.ca (Post.Office MTA v3.5.3 release 223 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Mon, 25 Jun 2001 11:27:39 -0300 Message-ID: <3B37053F.E22BAF13@ns.sympatico.ca> Date: Mon, 25 Jun 2001 02:32:48 -0700 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: Re.73kHz References: <000e01c0fce1$db62cba0$9992883e@g3aqc> Content-Type: text/html; charset=windows-1252 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit Hi Laurie,   I am  half in Sydney and half in Big Pond.  Won't be operational until next weekend.  73 de John VE1ZJ
Laurie Mayhead wrote:
Hi John,I hope to have my TX operational again by next weekend,so if you will have a recieve capability I will try to join Jim with some transmissions.Hopefully the present high Sunspot No's. will have dropped by then. 73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 255 invoked from network); 25 Jun 2001 15:49:57 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 25 Jun 2001 15:49:57 -0000 Received: (qmail 11166 invoked from network); 25 Jun 2001 15:18:25 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 25 Jun 2001 15:18:25 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15EY2f-0006mH-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Jun 2001 16:12:45 +0100 Received: from irwell.zetnet.co.uk ([194.247.47.48] helo=zetnet.co.uk ident=root) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15EY2M-0006m6-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Jun 2001 16:12:27 +0100 Received: from oemcomputer (man-s301.dialup.zetnet.co.uk [194.247.45.172]) by zetnet.co.uk (8.11.3/8.11.3/Debian 8.11.2-1) with SMTP id f5PFBbw16133 for ; Mon, 25 Jun 2001 16:11:38 +0100 Message-ID: <000f01c0fd88$e9b7f2a0$ac2df7c2@oemcomputer> From: "John Rabson" To: rsgb_lf_group@blacksheep.org References: <7D653C9C42F5D411A27C00508BF8803D55C50E@pdw-mail-r1.dstl.gov.uk> Subject: LF: Re: RE: LX1PD Date: Mon, 25 Jun 2001 16:04:53 +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 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: I think its 4%! 73 de John Rabson G3PAI ----- Original Message ----- From: "Talbot Andrew" To: Sent: Monday, June 25, 2001 2:03 PM Subject: LF: RE: LX1PD > That's set me thinking evil thoughts ....... > > 600V Mosfets in bridge. 3 phase rectifier giving 13% ripple even without > any decoupling caps, at a ripple freq of 300Hz. 10kW perhaps ! > > Andy G4JNT > > > > voltage comes from six-phase rectification of the > > 220/380V mains > > without a transformer. > > > > > > > -- > 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 22925 invoked from network); 25 Jun 2001 13:58:13 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 25 Jun 2001 13:58:13 -0000 Received: (qmail 28643 invoked from network); 25 Jun 2001 13:57:46 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 25 Jun 2001 13:57:46 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15EWld-00061W-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Jun 2001 14:51:05 +0100 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15EWlP-00061K-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Jun 2001 14:50:51 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id OAA19698; Mon, 25 Jun 2001 14:55:12 +0100 (BST) Received: (qmail 31726 invoked from network); 25 Jun 2001 14:42:59 -0000 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 25 Jun 2001 14:42:59 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: by gauntlet.mail.dera.gov.uk; id OAA12518; Mon, 25 Jun 2001 14:33:37 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma011261; Mon, 25 Jun 01 14:30:24 GMT Received: from mailex.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with SMTP id for ; Mon, 25 Jun 2001 14:13:57 +0100 Received: (qmail 13080 invoked from network); 25 Jun 2001 12:54:32 +0100 Received: from softdnserror (HELO cchecker.dstl.gov.uk) (192.168.248.52) by mailex.dstl.gov.uk with SMTP; 25 Jun 2001 11:54:32 -0000 Received: from FRN-MAIL-R1.dstl.gov.uk (unverified) by cchecker.dstl.gov.uk (Content Technologies SMTPRS 4.1.2) with ESMTP id for ; Mon, 25 Jun 2001 12:54:49 +0100 Received: by frn-mail-r1.dstl.gov.uk with Internet Mail Service (5.5.2650.21) id ; Mon, 25 Jun 2001 14:03:42 +0100 Message-ID: <7D653C9C42F5D411A27C00508BF8803D55C50E@pdw-mail-r1.dstl.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: LX1PD Date: Mon, 25 Jun 2001 14:03:45 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) 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's set me thinking evil thoughts ....... 600V Mosfets in bridge. 3 phase rectifier giving 13% ripple even without any decoupling caps, at a ripple freq of 300Hz. 10kW perhaps ! Andy G4JNT > voltage comes from six-phase rectification of the > 220/380V mains > without a transformer. > > -- 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 16458 invoked from network); 25 Jun 2001 12:08:47 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 25 Jun 2001 12:08:47 -0000 Received: (qmail 21064 invoked from network); 25 Jun 2001 12:05:30 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 25 Jun 2001 12:05:30 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15EUyk-00059T-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Jun 2001 12:56:30 +0100 Received: from rubellite.lion-access.net ([212.19.217.4]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15EUyg-00059O-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Jun 2001 12:56:27 +0100 Received: from w8k3f0 (Fiat.Cars.dialup.freeler.nl [212.26.216.168]) by rubellite.lion-access.net (I-Lab) with SMTP id EEAA2297A for ; Mon, 25 Jun 2001 11:55:04 +0000 (GMT) Message-ID: <006f01c0fd6e$81930620$a8d81ad4@w8k3f0> From: "Dick Rollema" To: rsgb_lf_group@blacksheep.org References: <1357139.993311698053.JavaMail.computernetworks@gomailjtp01> Subject: LF: LX1PD Date: Mon, 25 Jun 2001 14:00:08 +0200 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 John, G4CNN, wrote: > A good strong signal from LX1PD this afternoon. This is the first time I have heard him. > Heard Mike XDV calling him later, but with no success. > If you are on the Reflector, please tell us a bit about your setup. Dont know the name, sri. Jules is not on the reflector I think. He must be one of the first, if not THE first, continental station on 136kHz with a signal that could be heard all over Europe. I worked him 14 March 1999. He has send me QSL, circuit diagram and photographs via mail. LX1PD uses a beatifully looking valve transmitter with 8 pentodes PL36 parallel-pushpull in the final. Output 1.2kW. The anode voltage comes from six-phase rectification of the 220/380V mains without a transformer. L-type aerial of 200ft, base loaded. Receivers DrakeR7A and JPS NIR 12 DSP. Jules suffers from a high local noise level so his reception is not too good. Jules Braun lives at Hesperange in Luxemburg, JN39BN. 73, Dick, PA0SE JO22GD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7504 invoked from network); 25 Jun 2001 11:07:36 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 25 Jun 2001 11:07:36 -0000 Received: (qmail 2794 invoked from network); 25 Jun 2001 11:07:47 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 25 Jun 2001 11:07:47 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15EU6o-0004ec-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Jun 2001 12:00:46 +0100 X-MSMail-Priority: Normal Received: from ns3.swh.sk ([192.108.125.37]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15EU6k-0004eX-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Jun 2001 12:00:42 +0100 Received: from hermes.swh.sk (hermes [192.108.125.60]) by ns3.swh.sk (8.11.0/8.11.0) with ESMTP id f5PB6f025600 for ; Mon, 25 Jun 2001 13:06:41 +0200 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 MAA10856 for ; Mon, 25 Jun 2001 12:59:51 +0200 (MET DST) Received: by btss.swh.sk with Internet Mail Service (5.5.2653.19) id ; Mon, 25 Jun 2001 12:59:49 +0200 Message-ID: <29BDD4F529FCD311B631009027357C4E022587A0@btss103a.swh.sk> From: "Gasparik Richard" To: rsgb_lf_group@blacksheep.org Subject: RE: LF: Weekend activity...NIL Date: Mon, 25 Jun 2001 12:59:44 +0200 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) 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: Hi Ko and all... Yes, it's true, but I'm away from the highest activity...more than 1000km from you... 73 de Rich OM2TW -----Original Message----- From: Ko Versteeg [mailto:nl9222@wanadoo.nl] Sent: Monday, June 25, 2001 1:24 PM To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Weekend activity...NIL At 6/25/01 10:59:00, you wrote: >Hi LF-ers... > > I was surprised that the QRN on 136kHz was very low this weekend, >but the activity too, >better to stay on higher bands at this time of year... > >73 and enjoy LF...de Rich OM2TW Hi Rich.. and all Not all true, it must have been odd inversions as activity here was high enough to stay in the shack. Heard in Cw: F6CNI, DJ9IE, DJ5DI, G3OLB, F6BWO, PA3CPM. Heard in Qrss: G3XDV several times. Did not hear "LX" [Heard LX1PD 12th of June 2000] 73's Ko Versteeg, NL9222 [Grid: JO22KE - Lat: 52° 12' 15.0"N Long: 04° 51' 40.5"E] http://home.wanadoo.nl/nl9222/index.htm http://leden.tref.nl/~nl9222tv/default.htm From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22919 invoked from network); 25 Jun 2001 10:31:58 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 25 Jun 2001 10:31:58 -0000 Received: (qmail 29190 invoked from network); 25 Jun 2001 10:32:09 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 25 Jun 2001 10:32:09 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15ETXY-0004IW-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Jun 2001 11:24:20 +0100 Received: from smtp.wanadoo.nl ([194.134.193.6]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15ETXX-0004IR-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Jun 2001 11:24:19 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from default (p322.vcu.wanadoo.nl [194.134.200.214]) by smtp.wanadoo.nl (8.11.2/8.11.2) with SMTP id f5PANYJ21903 for ; Mon, 25 Jun 2001 12:23:34 +0200 (MET DST) Message-ID: <200106251023.f5PANYJ21903@smtp.wanadoo.nl> Date: Mon, 25 Jun 2001 12:23:38 +0100 From: "Ko Versteeg" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Weekend activity...NIL X-Mailer: FoxMail 2.1 [en] MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from 8bit to quoted-printable by smtp.wanadoo.nl id f5PANYJ21903 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: At 6/25/01 10:59:00, you wrote: >Hi LF-ers... > > I was surprised that the QRN on 136kHz was very low this weekend, >but the activity too, >better to stay on higher bands at this time of year... > >73 and enjoy LF...de Rich OM2TW Hi Rich.. and all Not all true, it must have been odd inversions as activity here was high enough to stay in the shack. Heard in Cw: F6CNI, DJ9IE, DJ5DI, G3OLB, F6BWO, PA3CPM. Heard in Qrss: G3XDV several times. Did not hear "LX" [Heard LX1PD 12th of June 2000] 73's Ko Versteeg, NL9222 [Grid: JO22KE - Lat: 52° 12' 15.0"N Long: 04° 51' 40.5"E] http://home.wanadoo.nl/nl9222/index.htm http://leden.tref.nl/~nl9222tv/default.htm From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19381 invoked from network); 25 Jun 2001 10:16:11 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 25 Jun 2001 10:16:11 -0000 Received: (qmail 26345 invoked from network); 25 Jun 2001 10:15:41 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 25 Jun 2001 10:15:41 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15ETHJ-0004Ae-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Jun 2001 11:07:33 +0100 Received: from protactinium.btinternet.com ([194.73.73.176] helo=protactinium) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15ETHG-0004AZ-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Jun 2001 11:07:30 +0100 Received: from [62.7.74.169] (helo=default) by protactinium with smtp (Exim 3.22 #9) id 15ETGa-0005OU-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Jun 2001 11:06:49 +0100 Message-ID: <000e01c0fd5e$54246b80$a94a073e@default> From: "Alan Melia" To: "LF-Group" Subject: LF: DX Cluster spots for June at GB7DXM Date: Mon, 25 Jun 2001 11:04:18 +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, I have not been listening too seriously recently but the list of stations spotted on the cluster may give a flavour of the activity to the East of me. I have been surprised to listen on some days and hear that the static background was very low even for this time of year. Regulars like G8RW, G6RO, G6NB, and G3OLB can be heard most afternoons..... from further east DJ9IE. F6CNI seems to be fairly active in the evenings, and is doing a good job to make that country available on the band. One interesting opinion I gleaned during the week was from an attendee at the Time/Frequency seminar at Rutherford-Appleton Labs. It seems that though it was being considered for use as a 'distributed' standard, no-one is now doing any serious work on Loran-C. One person's opinion was that due to political/economic circumstances the system now has a limited life.....he did not expect it to continue beyond 2007, and did not rule out earlier closure. There is also some disquiet about the future situation of the BT-operated Rugby standards. Another snippet was that the state-of-the-art GPS timing is now, since the removal of S/A, reaching an uncertainty level of a mere +/- 10nsecs !! It would seem that GPS standards are here to stay. There is so much of the worlds telecom systems dependent upon GPS distributed time for clock synchronisation that it will be very difficult for the it ever to be removed. Cluster spots follow:- 136.6 F6BWO 24-Jun-2001 1000Z in QSO dj1rl 136.9 DL3FDO 24-Jun-2001 0949Z cq cq 137.7 I5TGC 24-Jun-2001 0910Z CQ QRSS 136.6 OZ1KMR 23-Jun-2001 1843Z cq cq 137.6 OM2TW 23-Jun-2001 1134Z slow CQ... 136.4 G6RO 22-Jun-2001 1956Z cq 569 136.5 F6CNI 22-Jun-2001 1914Z 519 clair dans Paris 11hme 136.5 F6CNI 22-Jun-2001 1907Z wkg G3OLB 136.5 G3OLB 22-Jun-2001 1416Z cq 589 136.5 DJ9IE 21-Jun-2001 1645Z cq 579 136.5 DK6NI 17-Jun-2001 0937Z cq 137.6 OM2TW 17-Jun-2001 0916Z qrss 10 sec/dot 137.6 OM2TW 17-Jun-2001 0809Z cq qrss 137.6 OM2TW 16-Jun-2001 0957Z qrss 137.2 OM2TW 16-Jun-2001 0821Z with new PA. BIG sigs 136.4 DL3FDO 14-Jun-2001 1701Z in qso dk6ni 136.4 DK6NI 14-Jun-2001 1700Z 136.6 DL3FDO 14-Jun-2001 0904Z CQ 59 as usual in JO42 136.6 DF0WD 14-Jun-2001 0832Z 569 in JO02PB 136.4 OM2TW 13-Jun-2001 1654Z cq...strong 136.5 OM2TW 12-Jun-2001 1657Z cq cq no takers 136.6 DL3FDO 10-Jun-2001 1645Z in qso df6nm 136.6 DF6NM 10-Jun-2001 1631Z in qso dk6ni 136.5 OM2TW 10-Jun-2001 1304Z 136.5 DL3FDO 9-Jun-2001 1443Z 549 wkg dk6ni 519 136.5 OK1FIG 9-Jun-2001 1327Z weak 136.5 F6CNI 9-Jun-2001 1159Z with DK6NM 136.8 F6CNI 9-Jun-2001 1145Z 136.4 F6CNI 9-Jun-2001 1137Z 419 wkg df6nm (579) 136.3 F6CNI 9-Jun-2001 1137Z with DK6NM G3NYK de GB7MRS 25-Jun-2001 0944Z > 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 8248 invoked from network); 25 Jun 2001 09:09:31 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 25 Jun 2001 09:09:31 -0000 Received: (qmail 524 invoked from network); 25 Jun 2001 09:08:22 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 25 Jun 2001 09:08:22 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15ESEA-0003et-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 25 Jun 2001 10:00:14 +0100 Received: from ns3.swh.sk ([192.108.125.37]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15ESE6-0003eo-00 for rsgb_lf_group@blacksheep.org; Mon, 25 Jun 2001 10:00:10 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from hermes.swh.sk (hermes [192.108.125.60]) by ns3.swh.sk (8.11.0/8.11.0) with ESMTP id f5P968019055 for ; Mon, 25 Jun 2001 11:06:08 +0200 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 KAA01294 for ; Mon, 25 Jun 2001 10:59:18 +0200 (MET DST) Received: by btss.swh.sk with Internet Mail Service (5.5.2653.19) id ; Mon, 25 Jun 2001 10:59:15 +0200 Message-ID: <29BDD4F529FCD311B631009027357C4E0225879B@btss103a.swh.sk> From: "Gasparik Richard" To: "Rsgb_Lf_Group \(E-mail\)" Subject: LF: Weekend activity...NIL Date: Mon, 25 Jun 2001 10:59:12 +0200 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) 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 was surprised that the QRN on 136kHz was very low this weekend, but the activity too. I spent a lot of hours on CW and QRSS, but no trace (except I5TGC on QRSS). That's all. The only interesting QSOs I did on 2m via sporadic E with UA3 stations...well, better to stay on higher bands at this time of year... 73 and enjoy LF...de Rich OM2TW From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5371 invoked from network); 24 Jun 2001 19:19:32 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 24 Jun 2001 19:19:32 -0000 Received: (qmail 11343 invoked from network); 24 Jun 2001 19:19:46 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 24 Jun 2001 19:19:46 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15EFL2-0005jz-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Jun 2001 20:14:28 +0100 Received: from cmailg7.svr.pol.co.uk ([195.92.195.177]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15EFL1-0005ju-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Jun 2001 20:14:27 +0100 Received: from modem-25.celebrimbor.dialup.pol.co.uk ([62.136.146.153] helo=g3aqc) by cmailg7.svr.pol.co.uk with smtp (Exim 3.13 #0) id 15EFKL-0005J3-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Jun 2001 20:13:45 +0100 Message-ID: <000e01c0fce1$db62cba0$9992883e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: Re.73kHz Date: Sun, 24 Jun 2001 20:13:29 +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
Hi John,
I hope to have my TX operational again by next weekend,so if you will have a recieve capability I will try to join Jim with some transmissions.Hopefully the present high Sunspot No's. will have dropped by then. 73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3479 invoked from network); 24 Jun 2001 16:43:07 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 24 Jun 2001 16:43:07 -0000 Received: (qmail 18915 invoked from network); 24 Jun 2001 16:43:20 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 24 Jun 2001 16:43:20 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15ECtk-0004Sk-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Jun 2001 17:38:08 +0100 Received: from smtp.snet.net ([204.60.6.55]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15ECti-0004Sf-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Jun 2001 17:38:07 +0100 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 f5OGbNC16671; Sun, 24 Jun 2001 12:37:23 -0400 (EDT) Received: from rescueelect (nrwl-sh6-port216.snet.net [204.60.239.216]) by pop.snet.net (8.11.1/8.11.1/SNET-pop-1.5/D-1.8/O-1.6) with SMTP id f5OGbBr03424; Sun, 24 Jun 2001 12:37:13 -0400 (EDT) Message-ID: <001001c0fccc$12e37b80$0100a8c0@mshome.net> From: "Paul A. Cianciolo" To: rsgb_lf_group@blacksheep.org, lowfer@qth.net Subject: LF: antenna modeling of loops? Why not at 136 Khz Date: Sun, 24 Jun 2001 12:38:03 -0400 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, I am still not convinced that I should not try the loop antenna first, before the vertical. Although most off the replies I have gotten have been to the contrary. Here are my reasons: Please take issue with any that do not seem to be correct. 1) I have a pulley on my tower at 120' which gives a good location for the apex of the loop. 2) The house and shack is 150 feet away from the tower which would allow me to feed the antenna at approx the middle of the base so feed line would be minimal. 3) The perimeter of the loop (triangle shape ) would be approx 766' more if I can get my accommodating neighbor to allow me access to her property. This is considerable bigger than most of the other loops I have read about on 136 KHz.. So hopefully the efficiency would be better. I have not yet experimented with different size wires or wire cages. Also I am looking for anyone who look at my models with EZNEC 3,0 and see if my results look credible. I could email the files. Thank you all for reading this Here's hoping 136 Khz band arrives in the USA before winter!!!!!! 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 Air Rifle Target Shooting Enthusiast From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10160 invoked from network); 24 Jun 2001 07:25:56 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 24 Jun 2001 07:25:56 -0000 Received: (qmail 29113 invoked from network); 24 Jun 2001 07:26:10 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 24 Jun 2001 07:26:10 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15E4Ba-00004y-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 24 Jun 2001 08:19:58 +0100 Received: from tele-post-20.mail.demon.net ([194.217.242.20]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15E4BZ-00004t-00 for rsgb_lf_group@blacksheep.org; Sun, 24 Jun 2001 08:19:57 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from alg.demon.co.uk ([194.222.171.80]) by tele-post-20.mail.demon.net with esmtp (Exim 2.12 #2) id 15E4At-000J7y-0K for rsgb_lf_group@blacksheep.org; Sun, 24 Jun 2001 07:19:15 +0000 Message-ID: <3B3595AE.8E5E5261@alg.demon.co.uk> Date: Sun, 24 Jun 2001 08:24:30 +0100 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: Noise canceller revisited 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, In early June, and within a few days of each other, John G3CCH; Ron G6RO; and Bob G8RW all mentioned to me how new sources of local QRM on 136 kHz had suddenly appeared at their respective QTHs. The increasing number of LF operators experiencing QRM problems in suburban locations prompted me to see if I could redesign my noise canceller so that the phase-shift network could be built using readily available RF chokes, instead of using custom coils wound on 3C85 cores. Well, to cut a long story short, three weeks of effort (and virtually no operating!) has resulted in no alternative to using the custom coils, without incurring a significant re-design of the canceller. Of course, after all the trial and error attempts to get the RF chokes to work, my original (previously, neat and tidy) noise canceller now looks like a bird's nest. So it will take a few days to restore it! Nevertheless, I now know the way I'd like to proceed when I get time to build a new version of my dual noise canceller. I won't clog up the Reflector with the detail, but I have posted my thoughts at: http://www.alg.demon.co.uk/radio/136/noise_can.htm#ideas I've also updated the constructional details for my QRP LF TX at: http://www.alg.demon.co.uk/radio/136/qrptx.htm Regards to all, Steve GW4ALG From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19480 invoked from network); 23 Jun 2001 14:21:49 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 23 Jun 2001 14:21:49 -0000 Received: (qmail 23023 invoked from network); 23 Jun 2001 14:20:43 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 23 Jun 2001 14:20:43 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Do2E-0000OT-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Jun 2001 15:05:14 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from mailout01.sul.t-online.com ([194.25.134.80] helo=mailout01.sul.t-online.de) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Do2D-0000OO-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Jun 2001 15:05:13 +0100 Received: from fwd02.sul.t-online.de by mailout01.sul.t-online.de with smtp id 15Do1S-0008C5-02; Sat, 23 Jun 2001 16:04:26 +0200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from (087321565-0001@[217.2.68.1]) by fwd02.sul.t-online.com with smtp id 15Do1M-0xHgkCC; Sat, 23 Jun 2001 16:04:20 +0200 From: "Hans-Joachim Brandt" To: rsgb_lf_group@blacksheep.org References: <00c501c0ef45$d61a3ec0$5774ccd4@194.95.193.10.fen.baynet.de> <001601c0fbe7$58466740$0700000a@parissn2> Subject: Re: LF: Re: LF Meeting at the Ham Radio, June 30th X-Mailer: T-Online eMail 2.34 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Date: Sat, 23 Jun 2001 16:04:20 +0200 Message-ID: <15Do1M-0xHgkCC@fwd02.sul.t-online.com> X-Sender: 087321565-0001@t-dialin.net Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear Steward, at this date, less than one week before the beginning of the mess, I guess it is too late to expect to find a hotel within walking distance of railway station and Messe. I do not know where You will come from, and by what means You will travel, but I propose You should have a car available, to be prepared to live with a hotel in the vicinity of Friedrichshafen. The exhibition offers a large parking area. OK? 73 Ha-Jo, DJ1ZB Stewart Nelson schrieb: > Hi all, > > I've been thinking about coming to Friedrichshafen, and would probably arrive > Fri. evening and leave Sun. morning. > > Can someone recommend a decent hotel (~ DM 150) within walking distance of the > Banhof and/or Messe? > > At http://www.messe-fn.de/messen/ham_radio/index.php3 , if you click on > Unterkunft, there is an on-line booking form, but it only seems to > guarantee a place within 30 km :( . But if others have used this with > good results, I'll give it a shot. > > Thanks, > > Stewart KK7KA > > ----- Original Message ----- > From: "Walter Staubach" > To: > Sent: Thursday, June 07, 2001 1:33 PM > Subject: LF: Re: Re: LF Meeting at the Ham Radio, June 30th > > > Hallo Alberto - and all other friends who intend to come to the HAMRADIO, > we would be glad to welcome you at our LF-meeting. But sorry we will still > hold it in German. Maybe in the next years we`ll be > more international and speak more or less English more or less good. > (Meanwhile you should learn a few terms or sentences in the > bavarian dialect, that could help a lot ;-) > If you want to tell us something about your software - that would be > welcome, even in English. > And after the official two hours let`s meet in the "Dorfkrug" (restaurant), > 200meters apart, for an open end chat. Food, beer and > wine recommended. > 73 Walter DJ2LF > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19620 invoked from network); 23 Jun 2001 13:24:35 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 23 Jun 2001 13:24:35 -0000 Received: (qmail 29762 invoked from network); 23 Jun 2001 13:23:29 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 23 Jun 2001 13:23:29 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15DnJ6-0008W6-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Jun 2001 14:18:36 +0100 Received: from cobalt4.source.net ([206.100.10.38]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15DnJ4-0008W1-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Jun 2001 14:18:34 +0100 Received: from parissn2 (AMontsouris-101-1-4-162.abo.wanadoo.fr [193.253.216.162]) by cobalt4.source.net (8.9.3/8.9.3) with SMTP id GAA08114 for ; Sat, 23 Jun 2001 06:17:51 -0700 Message-ID: <001601c0fbe7$58466740$0700000a@parissn2> From: "Stewart Nelson" To: rsgb_lf_group@blacksheep.org References: <00c501c0ef45$d61a3ec0$5774ccd4@194.95.193.10.fen.baynet.de> Subject: LF: Re: LF Meeting at the Ham Radio, June 30th Date: Sat, 23 Jun 2001 15:20:58 +0200 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, I've been thinking about coming to Friedrichshafen, and would probably arrive Fri. evening and leave Sun. morning. Can someone recommend a decent hotel (~ DM 150) within walking distance of the Banhof and/or Messe? At http://www.messe-fn.de/messen/ham_radio/index.php3 , if you click on Unterkunft, there is an on-line booking form, but it only seems to guarantee a place within 30 km :( . But if others have used this with good results, I'll give it a shot. Thanks, Stewart KK7KA ----- Original Message ----- From: "Walter Staubach" To: Sent: Thursday, June 07, 2001 1:33 PM Subject: LF: Re: Re: LF Meeting at the Ham Radio, June 30th Hallo Alberto - and all other friends who intend to come to the HAMRADIO, we would be glad to welcome you at our LF-meeting. But sorry we will still hold it in German. Maybe in the next years we`ll be more international and speak more or less English more or less good. (Meanwhile you should learn a few terms or sentences in the bavarian dialect, that could help a lot ;-) If you want to tell us something about your software - that would be welcome, even in English. And after the official two hours let`s meet in the "Dorfkrug" (restaurant), 200meters apart, for an open end chat. Food, beer and wine recommended. 73 Walter DJ2LF From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23752 invoked from network); 23 Jun 2001 13:12:24 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 23 Jun 2001 13:12:24 -0000 Received: (qmail 14799 invoked from network); 23 Jun 2001 13:11:56 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 23 Jun 2001 13:11:56 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Dn9C-0008Ov-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Jun 2001 14:08:22 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from mailout06.sul.t-online.com ([194.25.134.19] helo=mailout06.sul.t-online.de) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Dn9B-0008Oq-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Jun 2001 14:08:21 +0100 Received: from fwd00.sul.t-online.de by mailout06.sul.t-online.de with smtp id 15Dn8S-00011C-08; Sat, 23 Jun 2001 15:07:36 +0200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from (087321565-0001@[217.2.40.227]) by fwd00.sul.t-online.com with smtp id 15Dn8L-0zuThJC; Sat, 23 Jun 2001 15:07:29 +0200 From: "Hans-Joachim Brandt" To: rsgb_lf_group@blacksheep.org References: <29BDD4F529FCD311B631009027357C4E02258788@btss103a.swh.sk> <15DYqc-0yu3ayC@fwd01.sul.t-online.com> <001401c0fbbe$bfe52f40$436274d5@w8k3f0> Subject: Re: LF: "Kugelblitz" X-Mailer: T-Online eMail 2.34 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Date: Sat, 23 Jun 2001 15:07:29 +0200 Message-ID: <15Dn8L-0zuThJC@fwd00.sul.t-online.com> X-Sender: 087321565-0001@t-dialin.net Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear all, in my big-volume Langenscheid's dictionary Kugelblitz is translated as "ball lightning", as John Rabson G3PAI has already proposed. 73 Ha-Jo, DJ1ZB Dick Rollema schrieb: > To All from PA0SE > > Uwe, DJ8WX wrote: > . > > > ah, whats "kugelblitz" on english? flash of lightning biting its tail? > > Well, I don't know what it is in English (couild not find it in a > dictionary) but what your wife saw could have been what in Dutch is called a > "bolbliksem". It is a rather rare phenomenom and is described as a ball of > fire, perhaps some 30cm in diameter, that slowly moves along overhead lines > or other objects and after several seconds explodes. It can cause extensive > damage in its surrounding, sometimes over a larger area than a "normal" > stroke of lightning would do. > > 73, Dick, PA0SE > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10783 invoked from network); 23 Jun 2001 12:21:18 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 23 Jun 2001 12:21:18 -0000 Received: (qmail 13014 invoked from network); 23 Jun 2001 12:20:12 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 23 Jun 2001 12:20:12 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15DmLC-00080e-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Jun 2001 13:16:42 +0100 Received: from jubilee.ns.sympatico.ca ([142.177.1.6] helo=mail-ns00s0.ns.sympatico.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15DmLB-00080Z-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Jun 2001 13:16:41 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.77.66]) by mail-ns00s0.ns.sympatico.ca (Post.Office MTA v3.5.3 release 223 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Sat, 23 Jun 2001 09:15:16 -0300 Message-ID: <3B34C1B7.E4A2AC05@ns.sympatico.ca> Date: Sat, 23 Jun 2001 12:20:07 -0400 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: 73 kHz 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 Jim we will be at cottage this weekend no LF there yet. Can,t look for you on weekend. Should have LF receive capability there by next weekend 73 de John VE1ZJ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6450 invoked from network); 23 Jun 2001 12:18:38 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 23 Jun 2001 12:18:38 -0000 Received: (qmail 8561 invoked from network); 23 Jun 2001 12:17:31 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 23 Jun 2001 12:17:31 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15DmHo-00080O-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Jun 2001 13:13:12 +0100 X-MSMail-Priority: Normal Received: from jubilee.ns.sympatico.ca ([142.177.1.6] helo=mail-ns00s0.ns.sympatico.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15DmHn-00080J-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Jun 2001 13:13:11 +0100 Received: from ns.sympatico.ca ([142.177.77.66]) by mail-ns00s0.ns.sympatico.ca (Post.Office MTA v3.5.3 release 223 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Sat, 23 Jun 2001 09:11:47 -0300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B34C0E5.758E9E9C@ns.sympatico.ca> Date: Sat, 23 Jun 2001 12:16:38 -0400 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: "Kugelblitz" References: <29BDD4F529FCD311B631009027357C4E02258788@btss103a.swh.sk> <15DYqc-0yu3ayC@fwd01.sul.t-online.com> <001401c0fbbe$bfe52f40$436274d5@w8k3f0> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all I think that might be what we call " ball lightening here" 73 de John VE1ZJ Dick Rollema wrote: > To All from PA0SE > > Uwe, DJ8WX wrote: > . > > ah, whats "kugelblitz" on english? flash of lightning biting its tail? > > Well, I don't know what it is in English (couild not find it in a > dictionary) but what your wife saw could have been what in Dutch is called a > "bolbliksem". It is a rather rare phenomenom and is described as a ball of > fire, perhaps some 30cm in diameter, that slowly moves along overhead lines > or other objects and after several seconds explodes. It can cause extensive > damage in its surrounding, sometimes over a larger area than a "normal" > stroke of lightning would do. > > 73, Dick, PA0SE From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16763 invoked from network); 23 Jun 2001 08:29:19 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 23 Jun 2001 08:29:19 -0000 Received: (qmail 9348 invoked from network); 23 Jun 2001 08:29:33 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 23 Jun 2001 08:29:33 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Dijq-0006DK-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Jun 2001 09:25:54 +0100 Received: from lepidachrosite.lion-access.net ([212.19.217.3]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Dijq-0006DF-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Jun 2001 09:25:54 +0100 Received: from w8k3f0 (1Cust67.tnt2.rtm1.nl.uu.net [213.116.98.67]) by lepidachrosite.lion-access.net (I-Lab) with SMTP id 1BA91CB13F for ; Sat, 23 Jun 2001 08:24:07 +0000 (GMT) Message-ID: <001401c0fbbe$bfe52f40$436274d5@w8k3f0> From: "Dick Rollema" To: rsgb_lf_group@blacksheep.org References: <29BDD4F529FCD311B631009027357C4E02258788@btss103a.swh.sk> <15DYqc-0yu3ayC@fwd01.sul.t-online.com> Subject: LF: "Kugelblitz" Date: Sat, 23 Jun 2001 10:29:01 +0200 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 Uwe, DJ8WX wrote: . > ah, whats "kugelblitz" on english? flash of lightning biting its tail? Well, I don't know what it is in English (couild not find it in a dictionary) but what your wife saw could have been what in Dutch is called a "bolbliksem". It is a rather rare phenomenom and is described as a ball of fire, perhaps some 30cm in diameter, that slowly moves along overhead lines or other objects and after several seconds explodes. It can cause extensive damage in its surrounding, sometimes over a larger area than a "normal" stroke of lightning would do. 73, Dick, PA0SE From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20877 invoked from network); 23 Jun 2001 07:57:10 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 23 Jun 2001 07:57:10 -0000 Received: (qmail 19430 invoked from network); 23 Jun 2001 07:56:04 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 23 Jun 2001 07:56:05 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Di6i-0005rA-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Jun 2001 08:45:28 +0100 Received: from irwell.zetnet.co.uk ([194.247.47.48] helo=zetnet.co.uk ident=root) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Di6h-0005r5-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Jun 2001 08:45:27 +0100 Received: from oemcomputer (man-s342.dialup.zetnet.co.uk [194.247.45.213]) by zetnet.co.uk (8.11.3/8.11.3/Debian 8.11.2-1) with SMTP id f5N7ihw29246 for ; Sat, 23 Jun 2001 08:44:43 +0100 Message-ID: <002c01c0fbb8$29fd6340$d52df7c2@oemcomputer> From: "John Rabson" To: rsgb_lf_group@blacksheep.org References: <29BDD4F529FCD311B631009027357C4E02258788@btss103a.swh.sk> <15DYqc-0yu3ayC@fwd01.sul.t-online.com> Subject: Re: LF: Loop antenna by DF3LP... Date: Sat, 23 Jun 2001 08:39:24 +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 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 ----- From: "jannsen" <0482183881-0001@t-online.de> To: Sent: Friday, June 22, 2001 10:52 PM Subject: Re: LF: Loop antenna by DF3LP... > ah, whats "kugelblitz" on english? flash of lightning biting its tail? Possily 'ball lightning'? 73 de John Rabson G3PAI From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17524 invoked from network); 23 Jun 2001 04:57:56 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 23 Jun 2001 04:57:56 -0000 Received: (qmail 7380 invoked from network); 23 Jun 2001 03:41:21 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 23 Jun 2001 03:41:21 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15DeDL-0003vp-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 23 Jun 2001 04:36:03 +0100 Received: from imo-m06.mx.aol.com ([64.12.136.161]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15DeDK-0003vk-00 for rsgb_lf_group@blacksheep.org; Sat, 23 Jun 2001 04:36:02 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from WarmSpgs@aol.com by imo-m06.mx.aol.com (mail_out_v30.22.) id l.12b.6f1947 (3965) for ; Fri, 22 Jun 2001 23:34:44 -0400 (EDT) From: WarmSpgs@aol.com Message-ID: <12b.6f1947.28656854@aol.com> Date: Fri, 22 Jun 2001 23:34:44 EDT Subject: Re: LF: static build up on aerials 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 6/20/01 3:58:37 AM Eastern Daylight Time, rik.strobbe@fys.kuleuven.ac.be writes: << Based on that I decided never ever to leave a coax connected to a 'floating' wire antenna in the shack. The arcs probably won't hurt anyone, but they could start a fire. >> They certainly could do that! I dread to think where the current would have flowed during my little lightning mishap last September if the antenna hadn't been grounded. There was some minor scorching of wood anyway, but it could have been much worse if the spark had needed to find its own path. 73, John From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10103 invoked from network); 23 Jun 2001 02:12:56 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 23 Jun 2001 02:12:56 -0000 Received: (qmail 19314 invoked from network); 22 Jun 2001 21:58:09 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 22 Jun 2001 21:58:09 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15DYrR-00017m-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 22 Jun 2001 22:53:05 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from mailout01.sul.t-online.com ([194.25.134.80] helo=mailout01.sul.t-online.de) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15DYrQ-00017h-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Jun 2001 22:53:04 +0100 Received: from fwd01.sul.t-online.de by mailout01.sul.t-online.de with smtp id 15DYql-0004sd-03; Fri, 22 Jun 2001 23:52:23 +0200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from (0482183881-0001@[62.157.50.5]) by fwd01.sul.t-online.com with smtp id 15DYqc-0yu3ayC; Fri, 22 Jun 2001 23:52:14 +0200 From: "jannsen" <0482183881-0001@t-online.de> To: rsgb_lf_group@blacksheep.org References: <29BDD4F529FCD311B631009027357C4E02258788@btss103a.swh.sk> Subject: Re: LF: Loop antenna by DF3LP... 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: Fri, 22 Jun 2001 23:52:14 +0200 Message-ID: <15DYqc-0yu3ayC@fwd01.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: Gasparik Richard schrieb: > Hi LF-ers... > > I have build an loop antenna (project of DF3LP). I find that the > sensitivity of the loop with preamp is very low. DFC39 is normaly 50-60dB > over S9 on my LW antenna, but with loop antenna it's 30dB less. I tuned it > for the maximu with serial caps. Directivity is very good (more than 40dB at > 90 degrees). It's normal or not ? > > 73 de Rich OM2TW > > Hi Rich, Peter es all I built Peters loop but changed it in four steps. at the end it was a uge copper-pipe rotary octaeder 15,2 m round. 4,6 to 5,0 m in diam. from step to step the nulls got clearer. but the main reason for building such a monstrum was: With the smaller ones I could not receive for example SVX, i.e. the sensitivity was bad, ur observation, Rich. today I am vy proud of this magnetic loop: never before had such a nice s/n ratio on lf. I will do some measurements conc. the s/n ratio. but guess I have to wait until winter. pse have a look at www.qsl.net/dj8wx/00010.html. BTW. have had heavy thunderstorm the last days. xyl: there was a "kugelplitz" in the garden. next day I controlled the magnetic loop. black marks on the pipesurface es some soldering drops I did not notice before but nothing damaged. ah, whats "kugelblitz" on english? flash of lightning biting its tail? regards Uwe/dj8wx From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23582 invoked from network); 22 Jun 2001 20:21:21 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 22 Jun 2001 20:21:21 -0000 Received: (qmail 17641 invoked from network); 22 Jun 2001 20:20:13 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 22 Jun 2001 20:20:13 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15DXFE-0000GY-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 22 Jun 2001 21:09:32 +0100 Received: from carbon.btinternet.com ([194.73.73.92]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15DXFD-0000GT-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Jun 2001 21:09:31 +0100 Received: from [62.7.8.212] (helo=j1r9b7) by carbon.btinternet.com with smtp (Exim 3.22 #9) id 15DXEX-0005qf-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Jun 2001 21:08:49 +0100 Message-ID: <002b01c0fb56$5f421760$3f507ad5@j1r9b7> From: "Derek Atter" To: rsgb_lf_group@blacksheep.org References: Subject: LF: Re: Source for Litz wire at the Ham Radio ? Date: Fri, 22 Jun 2001 21:02:20 +0100 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2919.6600 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
Dear Wolf,
 
The Crawley Club have a quantity of "HF" Litz wire available with different diameters and number of separately insulated strands suitable for making high Q loops.  Probably the best would be the type with approximately 2mm diameter which has about 140 strands and double silk covered. The cost of that is 2.0 UK pounds per 10 metres plus postage cost.  You will probably need around 100m.
   The club did have some 2mm diam Litz with outer polthyene weather proof plastic covering but that has now all gone.  Contact me if you wish to obtain some of the Litz
 
                         Vy 73,   Derek Atter,  G3GRO    
 
                          E-mail  -  datter@btinternet.co,uk  or Tel  (44)1293 520 424
 
 
----- Original Message ----- 
Sent: Friday, June 22, 2001 6:49 AM
Subject: LF: Source for Litz wire at the Ham Radio ?

Dear LF group,

for an active or passive RX loop antenna (G3LDO design or similar) I am
looking for the "Litz" wire mentioned several times on this reflector.
As far as I understood, it contains a number of thin copper wires
electrically insulated against each other to reduce the skin effect.
(BTW in DL, when you order "Litze" you just get flexible wire for
installation purposes. An other kind called "HF Litze" is very expensive,
very thin and sold in lenghts of a few meters only).

Has anyone ever compared the Q factor of a loop antenna built with Litz wire
to one with simple stranded wire ?

Any possibility to get the "good Litz" at the Ham Radio in Friedrichshafen ?

73, Wolf  DL4YHF.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22433 invoked from network); 22 Jun 2001 06:23:49 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 22 Jun 2001 06:23:49 -0000 Received: (qmail 6820 invoked from network); 22 Jun 2001 06:23:30 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 22 Jun 2001 06:23:30 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15DKGi-0001aJ-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 22 Jun 2001 07:18:12 +0100 Received: from ns3.swh.sk ([192.108.125.37]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15DKGf-0001aE-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Jun 2001 07:18:09 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from hermes.swh.sk (hermes [192.108.125.60]) by ns3.swh.sk (8.11.0/8.11.0) with ESMTP id f5M6O9S32337 for ; Fri, 22 Jun 2001 08:24:09 +0200 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 IAA03220 for ; Fri, 22 Jun 2001 08:17:19 +0200 (MET DST) Received: by btss.swh.sk with Internet Mail Service (5.5.2653.19) id ; Fri, 22 Jun 2001 08:17:16 +0200 Message-ID: <29BDD4F529FCD311B631009027357C4E0225878C@btss103a.swh.sk> From: "Gasparik Richard" To: rsgb_lf_group@blacksheep.org Subject: RE: LF: Loop antenna by DF3LP... Date: Fri, 22 Jun 2001 08:17:15 +0200 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset=iso-8859-2; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Peter and LF-group... That's OK. Sorry for my mistake, tuning cap is parallel. For the frame I'm using RG58 coax, so not very good one. With my radio IC-761 is an preamp needed...so, thank you very much for your information...best regards and I hope to see you sometimes on 136... 73 de Rich OM2TW -----Original Message----- From: Peter W. Schnoor [mailto:pwsch@nephro.uni-kiel.de] Sent: Thursday, June 21, 2001 6:31 PM To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Loop antenna by DF3LP... Hello Richard, Gasparik Richard wrote: > I have build an loop antenna (project of DF3LP). I find that the > sensitivity of the loop with preamp is very low. DFC39 is normaly 50-60dB > over S9 on my LW antenna, but with loop antenna it's 30dB less. The "gain" of this antenna is approx. -60 dB, approx. 30 dB down compared to my vertical. So the simple preamp as described *plus* a Dual-Gate MosFet in front of my first mixer stage are sufficient for hearing/seeing reasonable background noise levels even on "quiet" winter mornings. > I tuned it for the maximu with serial caps. Hmm... I remember using *parallel* caps so that the loop acts as parallel tuned circuit! Do you apply rigid Flexwell cable or similar for the frame? I found a significant difference using rugged air insulated cable compared to thin coax (60 Ohms) of unknown origin at the same geometry. RG213 or better are recommended. Compared to other loop designs the bandwidth is *broad* and it was difficult tuning the mid frequency right on the amateur band by fixed caps. > Directivity is very good (more than 40dB at > 90 degrees). It's normal or not ? Yes, I found more than 50 dB of directivity at ground wave (!) propagation. The main goal for building this loop was (i) nulling out the LORAN splatter from SYLT as sharp as possible and (ii) shielding the E-field as much as possible. 73 es gl de DF3LP Peter From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21458 invoked from network); 22 Jun 2001 05:57:11 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 22 Jun 2001 05:57:11 -0000 Received: (qmail 16153 invoked from network); 22 Jun 2001 05:57:02 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 22 Jun 2001 05:57:02 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15DJqd-0001KY-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 22 Jun 2001 06:51:15 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from imo-r01.mx.aol.com ([152.163.225.97]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15DJqA-0001KT-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Jun 2001 06:50:46 +0100 Received: from DL4YHF@aol.com by imo-r01.mx.aol.com (mail_out_v31.6.) id l.e3.167b8ae3 (3928) for ; Fri, 22 Jun 2001 01:49:55 -0400 (EDT) From: DL4YHF@aol.com Message-ID: Date: Fri, 22 Jun 2001 01:49:54 EDT Subject: LF: Source for Litz wire at the Ham Radio ? To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Mailer: AOL 6.0 for Windows DE sub 217 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit Dear LF group,

for an active or passive RX loop antenna (G3LDO design or similar) I am
looking for the "Litz" wire mentioned several times on this reflector.
As far as I understood, it contains a number of thin copper wires
electrically insulated against each other to reduce the skin effect.
(BTW in DL, when you order "Litze" you just get flexible wire for
installation purposes. An other kind called "HF Litze" is very expensive,
very thin and sold in lenghts of a few meters only).

Has anyone ever compared the Q factor of a loop antenna built with Litz wire
to one with simple stranded wire ?

Any possibility to get the "good Litz" at the Ham Radio in Friedrichshafen ?

73, Wolf  DL4YHF.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11995 invoked from network); 22 Jun 2001 01:04:44 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 22 Jun 2001 01:04:44 -0000 Received: (qmail 10960 invoked from network); 22 Jun 2001 01:04:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 22 Jun 2001 01:04:26 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15DFIg-0007ZE-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 22 Jun 2001 01:59:54 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from public2.thorcom.com ([212.172.148.20] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15DFIe-0007Z5-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Jun 2001 01:59:52 +0100 Received: from hestia.herts.ac.uk ([147.197.200.9]) by public2.thorcom.com with esmtp (Exim 3.02 #1) id 15D7OM-0007IJ-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 17:33:15 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 15D879-0000fJ-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 18:19:31 +0100 Received: from [147.197.232.252] (helo=mj9ar) by gemini.herts.ac.uk with smtp (Exim 3.22 #2) id 15D878-0003YH-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 18:19:30 +0100 From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Thu, 21 Jun 2001 18:20:45 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: 73kHz Beacon tonight X-Mailer: Pegasus Mail for Win32 (v3.11) Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF Group, I plan to operate a beacon signal on 71.924kHz from 0000 until 0300 utc again tonight. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25090 invoked from network); 21 Jun 2001 23:20:09 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 21 Jun 2001 23:20:09 -0000 Received: (qmail 21827 invoked from network); 21 Jun 2001 23:19:52 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 21 Jun 2001 23:19:52 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15DDeQ-0006iL-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 22 Jun 2001 00:14:14 +0100 Received: from public1.thorcom.com ([212.172.148.10] ident=root) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15DDeM-0006i6-00 for rsgb_lf_group@blacksheep.org; Fri, 22 Jun 2001 00:14:10 +0100 Received: from rhenium.btinternet.com ([194.73.73.93] helo=rhenium) by public1.thorcom.com with esmtp (Exim 3.20 #1) id 15DCK9-00034B-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 22:49:13 +0100 Received: from [213.122.64.197] (helo=default) by rhenium with smtp (Exim 3.22 #9) id 15DCK7-0002N0-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 22:49:11 +0100 Message-ID: <005101c0faa4$ecff2aa0$c5407ad5@default> From: "Fred Rattray" To: rsgb_lf_group@blacksheep.org References: Conversation <01bd55b2$e0097de0$0100007f@localhost> with last message <01bd55b2$e0097de0$0100007f@localhost> <3B3189F5.53FC11C7@alg.demon.co.uk> Subject: LF: Re: G4SPR/G6RO QSO Date: Thu, 21 Jun 2001 21:05:32 -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 5.50.4133.2400 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 Gear this end is a G3TDZ phasing receiver normally used for my caving experiments, but retuned to 136Khz. Picture of receiver (actually a ssb transceiver) can be seen in 73 Khz LF SSTV article in the June 1997 RadCom. (picture of me with gear but unfortunetly incorrect callsign and name against it. It reads G0TFS, who is my brother Jimmy.) Receiving aerial is a 26 turn series tuned 90cm square loop Transmitter is quite basic. Xtal controlled 4060 to a 4011 where the keying is applied also. Output of this goes through an RC filter to make the square wave a little more sinusoidal looking. Next stage is a BC548 with toko coil tuning in the collector which then drives a TIP31 running at 38 volts and that feeds a pair of 2SJ119 FETS in parallel with a -38 volts supply. Transmit aerial is a loading coil wound on a plastic 10 gallon drum to an ex-army telescopic mast (with insulating base) which has a 80metre centre loaded mobile aerial fitted to the top to make it longer.(approx overall height 10 metres). During my QSO with Ron the feed point started to arc to the grass which had grown up around it, and then the loading coil started to breakdown. A quick spread of the turns affected, and a bit of sticky tape and I was back on the air. It was all panic but good fun. Need to brush up on my CW as not so good at receiving. Regards all Fred G4SPR ----- Original Message ----- From: "Steve Rawlings" To: Sent: 21 June 2001 05:45 Subject: LF: G4SPR/G6RO QSO > > A long time ago (March 1998), Peter G3PLX wrote: > > . . . Worked my neighbour G4SPR at Kirkby Stephen, about 40km > > away, 559 both ways. Fred is better known for his caving VLF > > activities. > Well, I was pleased to learn that Fred G4SPR (Cumbria) is active > again on 136 kHz! > > Ron G6RO had a QSO with Fred on Tuesday evening, exchanging RST > 339/599 reports. I heard Ron's side of the QSO on my loop > antenna, but the deep antenna null to the north of me meant that > I had little chance of detecting Fred's signal. > > So - what gear are you using, Fred? (I wonder, were you loading > the antenna with that big Proton Magnetometer coil?!) > > Regards to all, > Steve GW4ALG > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27881 invoked from network); 21 Jun 2001 16:58:48 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 21 Jun 2001 16:58:48 -0000 Received: (qmail 19014 invoked from network); 21 Jun 2001 16:58:32 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 21 Jun 2001 16:58:32 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15D7iU-0003BX-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Jun 2001 17:54:02 +0100 Received: from smtp.wanadoo.nl ([194.134.193.6]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15D7iR-0003BS-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 17:53:59 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from default (p1044.vcu.wanadoo.nl [194.134.203.25]) by smtp.wanadoo.nl (8.11.2/8.11.2) with SMTP id f5LGrH621080 for ; Thu, 21 Jun 2001 18:53:17 +0200 (MET DST) Message-ID: <200106211653.f5LGrH621080@smtp.wanadoo.nl> Date: Thu, 21 Jun 2001 18:53:19 +0100 From: "Ko Versteeg" To: rsgb_lf_group@blacksheep.org Subject: Re: Re: LF: Re: Commercial TX for 136 X-Mailer: FoxMail 2.1 [en] MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from 8bit to quoted-printable by smtp.wanadoo.nl id f5LGrH621080 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: At 6/21/01 16:40:00, you wrote: > >> PS. is there a morse character for @ ? Mike.. @ would be ........ [8 dots] 73's Ko Versteeg, NL9222 [Grid: JO22KE - Lat: 52° 12' 15.0"N Long: 04° 51' 40.5"E] http://home.wanadoo.nl/nl9222/index.htm http://leden.tref.nl/~nl9222tv/default.htm From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17650 invoked from network); 21 Jun 2001 16:37:16 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 21 Jun 2001 16:37:16 -0000 Received: (qmail 26279 invoked from network); 21 Jun 2001 16:36:56 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Jun 2001 16:36:56 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15D7NS-00032s-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Jun 2001 17:32:18 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from ims.rz.uni-kiel.de ([134.245.1.88]) by post.thorcom.com with smtp (Exim 3.16 #2) id 15D7NN-00032l-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 17:32:14 +0100 Received: from srv1.mail.uni-kiel.de by ims.rz.uni-kiel.de with Local-SMTP (PP); Thu, 21 Jun 2001 18:30:57 +0200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from nephro.uni-kiel.de (PC108194.dial.uni-kiel.de [134.245.108.194]) by srv1.mail.uni-kiel.de (8.9.3+Sun/8.9.1) with ESMTP id SAA07007 for ; Thu, 21 Jun 2001 18:30:53 +0200 (MET DST) Message-ID: <3B322147.DA381EE0@nephro.uni-kiel.de> Date: Thu, 21 Jun 2001 18:31:03 +0200 From: "Peter W. Schnoor" Organization: Clinic of Nephrology, University of Kiel X-Mailer: Mozilla 4.74 [en] (X11; U; Linux 2.2.16 i586) X-Accept-Language: de-DE, en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Loop antenna by DF3LP... References: <29BDD4F529FCD311B631009027357C4E02258788@btss103a.swh.sk> 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 Richard, Gasparik Richard wrote: > I have build an loop antenna (project of DF3LP). I find that the > sensitivity of the loop with preamp is very low. DFC39 is normaly 50-60dB > over S9 on my LW antenna, but with loop antenna it's 30dB less. The "gain" of this antenna is approx. -60 dB, approx. 30 dB down compared to my vertical. So the simple preamp as described *plus* a Dual-Gate MosFet in front of my first mixer stage are sufficient for hearing/seeing reasonable background noise levels even on "quiet" winter mornings. > I tuned it for the maximu with serial caps. Hmm... I remember using *parallel* caps so that the loop acts as parallel tuned circuit! Do you apply rigid Flexwell cable or similar for the frame? I found a significant difference using rugged air insulated cable compared to thin coax (60 Ohms) of unknown origin at the same geometry. RG213 or better are recommended. Compared to other loop designs the bandwidth is *broad* and it was difficult tuning the mid frequency right on the amateur band by fixed caps. > Directivity is very good (more than 40dB at > 90 degrees). It's normal or not ? Yes, I found more than 50 dB of directivity at ground wave (!) propagation. The main goal for building this loop was (i) nulling out the LORAN splatter from SYLT as sharp as possible and (ii) shielding the E-field as much as possible. 73 es gl de DF3LP Peter From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20499 invoked from network); 21 Jun 2001 15:54:24 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 21 Jun 2001 15:54:24 -0000 Received: (qmail 26970 invoked from network); 21 Jun 2001 15:54:12 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Jun 2001 15:54:12 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15D6ez-0002eD-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Jun 2001 16:46:21 +0100 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 #2) id 15D6ev-0002e8-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 16:46:18 +0100 Received: from miked by rsgb.org.uk with SMTP (MDaemon.PRO.v4.0.0.R) for ; Thu, 21 Jun 2001 16:40:37 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Thu, 21 Jun 2001 16:40:35 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: Re: Commercial TX for 136 Message-ID: <3B322383.12219.1A2AE34@localhost> In-reply-to: <002001c0fa5a$a66966e0$fe00a8c0@martin> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-Return-Path: miked@mail X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > PS. is there a morse character for @ ? AT seems short and to the point! Mike, G3XDV (IO91VT) http://www.lf.thersgb.net From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 417 invoked from network); 21 Jun 2001 14:19:23 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 21 Jun 2001 14:19:23 -0000 Received: (qmail 8491 invoked from network); 21 Jun 2001 14:18:24 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 21 Jun 2001 14:18:24 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15D5CG-0001sd-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Jun 2001 15:12:36 +0100 Received: from scutter.tele2.net.uk ([212.19.64.5] helo=scutter.tele2.co.uk) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15D5CC-0001sY-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 15:12:32 +0100 Received: from martin (wireless-066-114.tele2.co.uk [212.19.66.114]) by scutter.tele2.co.uk (Postfix) with SMTP id 86CCC13F12 for ; Thu, 21 Jun 2001 15:17:00 +0100 (BST) Message-ID: <002001c0fa5a$a66966e0$fe00a8c0@martin> From: "m5cix" To: rsgb_lf_group@blacksheep.org References: <118.698000.285d4165@aol.com> <3B2D3DD4.D3E62691@ns.sympatico.ca> <001b01c0f9d5$d9406440$7b102cc3@computer> Subject: LF: Re: Commercial TX for 136 Date: Thu, 21 Jun 2001 15:01:20 +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 5.50.4522.1200 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: Thank you for your comments. Nevada had one left in stock which I duly purchased. Regards Martin M5CIX PS. is there a morse character for @ ? From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29452 invoked from network); 21 Jun 2001 13:32:06 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 21 Jun 2001 13:32:06 -0000 Received: (qmail 17820 invoked from network); 21 Jun 2001 13:31:57 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 21 Jun 2001 13:31:57 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15D4TD-0001Uv-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Jun 2001 14:26:03 +0100 Received: from ns3.swh.sk ([192.108.125.37]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15D4T8-0001Uq-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 14:25:59 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from hermes.swh.sk (hermes [192.108.125.60]) by ns3.swh.sk (8.11.0/8.11.0) with ESMTP id f5LDVtS11057 for ; Thu, 21 Jun 2001 15:31:55 +0200 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 PAA21328 for ; Thu, 21 Jun 2001 15:25:05 +0200 (MET DST) Received: by btss.swh.sk with Internet Mail Service (5.5.2653.19) id ; Thu, 21 Jun 2001 15:25:03 +0200 Message-ID: <29BDD4F529FCD311B631009027357C4E02258788@btss103a.swh.sk> From: "Gasparik Richard" To: "Rsgb_Lf_Group \(E-mail\)" Subject: LF: Loop antenna by DF3LP... Date: Thu, 21 Jun 2001 15:25:02 +0200 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) 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 have build an loop antenna (project of DF3LP). I find that the sensitivity of the loop with preamp is very low. DFC39 is normaly 50-60dB over S9 on my LW antenna, but with loop antenna it's 30dB less. I tuned it for the maximu with serial caps. Directivity is very good (more than 40dB at 90 degrees). It's normal or not ? 73 de Rich OM2TW From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18047 invoked from network); 21 Jun 2001 12:56:17 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 21 Jun 2001 12:56:17 -0000 Received: (qmail 5765 invoked from network); 21 Jun 2001 12:55:57 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Jun 2001 12:55:57 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15D3rO-00017k-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Jun 2001 13:46:58 +0100 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 #2) id 15D3rN-00017f-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 13:46:58 +0100 Received: from miked by rsgb.org.uk with SMTP (MDaemon.PRO.v4.0.0.R) for ; Thu, 21 Jun 2001 13:45:20 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Thu, 21 Jun 2001 13:45:17 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: Re: Commercial TX for 136 Message-ID: <3B31FA6D.18583.102331B@localhost> In-reply-to: <001d01c0fa47$8e824d20$1c6e78d5@btopenworld.com> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-Return-Path: miked@mail X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > I have put my Ropex review on the web now. > http://www.wireless.org.uk/ropex.htm > I didn't know they were still for sale! > 73 Dave G3YXM. Whilst there are still appreciable stocks of The First, the designer won't produce 'The Second' which might address some of our criticisms, so it is in all our interests to promote this one! 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 24547 invoked from network); 21 Jun 2001 11:59:27 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 21 Jun 2001 11:59:27 -0000 Received: (qmail 27086 invoked from network); 21 Jun 2001 11:59:07 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Jun 2001 11:59:07 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15D312-0000dg-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Jun 2001 12:52:52 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from smtp6vepub.gte.net ([206.46.170.27] helo=smtp6ve.mailsrvcs.net) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15D30y-0000dY-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 12:52:48 +0100 Received: from ieee.org (client-151-200-118-203.bellatlantic.net [151.200.118.203]) by smtp6ve.mailsrvcs.net (8.9.1/8.9.1) with ESMTP id LAA33196635; Thu, 21 Jun 2001 11:51:27 GMT X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B31DFDD.5B820F72@ieee.org> Date: Thu, 21 Jun 2001 07:51:57 -0400 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: "lf-amrad" , "AMRAD Tacos" Subject: Re: LF: Commercial TX - Ropex Info References: Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from 8bit to quoted-printable by smtp6ve.mailsrvcs.net id LAA33196635 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello LF Gang, Since my original review of "The First" Ropex transmitter has been quoted on this reflector, let me add a few comments: a) our unit actually produces 170 watts rather than the 130 watts advertised, b) our unit has been used 24/7 for the past two years as a beacon, (now QRSS) and has never failed, c) its output circuit protection scheme works flawlessly, d) the output waveform is excellent, e) my negative comments (about crystal changing, etc.) still apply when it comes to trying to change the Ropex' operating frequency. As a beacon though, on a fixed frequency, it is perfect and has been a very good investment. 73 Andre' N4ICK ***************************************************************************** James Moritz wrote: > > Dear Martin, LF Group, > > Nevada have the Ropex "The First" TX listed for £189. N4ICK did a > brief review of it that you can see on the AMRAD web pages at: > > http://www.amrad.org/projects/lf/FirstRvw.html > > Quite a few of these seem to be in use, especially on the > continent; the main problem seems to be the fixed frequency - I > believe some people have modified them for VFO operation. > > Cheers, Jim Moritz > 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 40 invoked from network); 21 Jun 2001 11:47:06 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 21 Jun 2001 11:47:06 -0000 Received: (qmail 22646 invoked from network); 21 Jun 2001 11:46:50 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 21 Jun 2001 11:46:50 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15D2ok-0000WJ-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Jun 2001 12:40:10 +0100 Received: from gadolinium.btinternet.com ([194.73.73.111]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15D2og-0000WE-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 12:40:06 +0100 Received: from [213.120.110.28] (helo=mud) by gadolinium.btinternet.com with smtp (Exim 3.22 #9) id 15D2o0-0000qn-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 12:39:25 +0100 Message-ID: <001d01c0fa47$8e824d20$1c6e78d5@btopenworld.com> From: "G3YXM" To: rsgb_lf_group@blacksheep.org References: <118.698000.285d4165@aol.com> <3B2D3DD4.D3E62691@ns.sympatico.ca> <001b01c0f9d5$d9406440$7b102cc3@computer> Subject: LF: Re: Commercial TX for 136 Date: Thu, 21 Jun 2001 12:44:32 +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: Martin and all. I have put my Ropex review on the web now. http://www.wireless.org.uk/ropex.htm I didn't know they were still for sale! 73 Dave G3YXM. ----- Original Message ----- From: Martin M5CIX To: Sent: Wednesday, June 20, 2001 11:10 PM Subject: LF: Commercial TX for 136 > > > I have heard that there is a company offering an off the shelf TX around > £110. Am unable to track it down and was wodering if any one can confirm? > > Martin M5CIX > > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27308 invoked from network); 21 Jun 2001 11:10:08 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 21 Jun 2001 11:10:08 -0000 Received: (qmail 21427 invoked from network); 21 Jun 2001 11:09:04 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Jun 2001 11:09:04 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15D2As-0000Eq-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Jun 2001 11:58:58 +0100 X-MSMail-Priority: Normal Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15D2Am-0000El-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 11:58:53 +0100 Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 15D2A6-0005el-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 11:58:10 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.232.252] (helo=mj9ar) by gemini.herts.ac.uk with smtp (Exim 3.22 #2) id 15D2A6-0006wJ-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 11:58:10 +0100 From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Thu, 21 Jun 2001 11:59:24 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: Commercial TX - Ropex Info X-Mailer: Pegasus Mail for Win32 (v3.11) Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear Martin, LF Group, Nevada have the Ropex "The First" TX listed for £189. N4ICK did a brief review of it that you can see on the AMRAD web pages at: http://www.amrad.org/projects/lf/FirstRvw.html Quite a few of these seem to be in use, especially on the continent; the main problem seems to be the fixed frequency - I believe some people have modified them for VFO operation. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25236 invoked from network); 21 Jun 2001 10:22:13 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 21 Jun 2001 10:22:13 -0000 Received: (qmail 21067 invoked from network); 21 Jun 2001 10:21:09 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Jun 2001 10:21:09 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15D1TF-0008Oq-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Jun 2001 11:13:53 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from imo-r02.mx.aol.com ([152.163.225.98]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15D1TD-0008Ol-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 11:13:52 +0100 Received: from DL4YHF@aol.com by imo-r02.mx.aol.com (mail_out_v30.22.) id l.92.1652fc74 (4249) for ; Thu, 21 Jun 2001 06:13:07 -0400 (EDT) From: DL4YHF@aol.com Message-ID: <92.1652fc74.286322b3@aol.com> Date: Thu, 21 Jun 2001 06:13:07 EDT Subject: LF: Re: Commercial TX for 136 To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Mailer: AOL 6.0 for Windows DE sub 217 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit Hi Martin,

Look at

http://www.amrad.org/projects/lf/FirstRvw.html

I don't know the "Ropex First" Transceiver myself, but I think its main
disadvantage is the lack of a VFO.

There have also been articles by Peter (G3LDO) and Dave (G3YXM) but I could
not find them in "electronic" form.

Best regards,

Wolf DL4YHF. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10912 invoked from network); 21 Jun 2001 07:32:30 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 21 Jun 2001 07:32:30 -0000 Received: (qmail 12827 invoked from network); 21 Jun 2001 07:31:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Jun 2001 07:31:26 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Cyp7-0006xQ-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Jun 2001 08:24:17 +0100 Received: from latimer.mail.uk.easynet.net ([195.40.1.40]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Cyp6-0006xL-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 08:24:16 +0100 Received: from ericadodd (tnt-18-135.easynet.co.uk [212.134.224.135]) by latimer.mail.uk.easynet.net (Postfix) with SMTP id D7520536ED for ; Thu, 21 Jun 2001 08:23:32 +0100 (BST) Message-ID: <002201c0fa23$de3e5440$87e086d4@ericadodd> From: "g3ldo" To: rsgb_lf_group@blacksheep.org References: <000f01c0f8a6$b6efc3c0$f57674d5@w8k3f0> Subject: LF: Re: Protection against lightning Date: Thu, 21 Jun 2001 08:24:03 +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 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: Dick Rollema said: > When not in the shack I leave the aerial floating in the hope that it will > be charged to the voltage potential of its surrounding so that lightning > won't "see" it. > Or is that a misconception? In a discussion with Arnie, CO2KK, regarding this subject he said that in areas of tropical storms antennas were best ungrounded and all equipment disconnected from the antenna, ac supplies and even from ground. However there should be provision for flashover to ground (at some distance from the shack if possible) if the antenna static potential becomes excessive. An ungrounded antenna reduces the potential gradient in the area above the antenna. In Kenya I used a rhombic which used to collect static that flashed over to the metal window frame if there was a wind (and sometimes rain). If there was a thunderstorm in the vicinity I used to disconnect the feeders from the ATU and throw them out onto the ground outside. My 60ft mast in Sierra Leone was hit by lightning one night - it seemed that the room was filled with a blinding blue flash accompanied by a loud crack. All the lights went out. I went into the pantry (to check the electrical fuse boxes etc ) and all that I could see were wires sticking out of the wall and bits of bakelite and annealed copper on the floor. All electrical equipment not connected to the ac supply, including the radio, survived. The ac supply was fed to the house via overhead wires that probably made the situation worse. At this QTH the mast is folded over most of the time so the same sort of situation does not arise. Although the above experience had made me rather paranoid about lightning I try to tell myself that the chances of a normal QTH with a TV antenna being hit (in the UK) has been estimated to be once every 400 years. Regards, Peter, G3LDO e-mail Web From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27302 invoked from network); 21 Jun 2001 07:30:17 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 21 Jun 2001 07:30:17 -0000 Received: (qmail 19591 invoked from network); 21 Jun 2001 07:30:02 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 21 Jun 2001 07:30:02 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Cyog-0006xJ-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Jun 2001 08:23:50 +0100 Received: from mta01-svc.ntlworld.com ([62.253.162.41]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Cyod-0006xE-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 08:23:47 +0100 Received: from oemcomputer ([213.104.98.121]) by mta01-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20010621072304.ONKH351.mta01-svc.ntlworld.com@oemcomputer> for ; Thu, 21 Jun 2001 08:23:04 +0100 Message-ID: <003201c0fa23$116672e0$796268d5@oemcomputer> From: "mike.dennison" To: rsgb_lf_group@blacksheep.org References: <118.698000.285d4165@aol.com> <3B2D3DD4.D3E62691@ns.sympatico.ca> <001b01c0f9d5$d9406440$7b102cc3@computer> Subject: LF: Re: Commercial TX for 136 Date: Thu, 21 Jun 2001 08:10:56 +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: > I have heard that there is a company offering an off the shelf TX around > £110. Am unable to track it down and was wodering if any one can confirm? > > Martin M5CIX A 12V 120W Tx called "The First" is available from Nevada Communications. It is crystal controlled. Mike, G3XDV http://www.lf.thersgb.net From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20345 invoked from network); 21 Jun 2001 05:45:44 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 21 Jun 2001 05:45:44 -0000 Received: (qmail 25276 invoked from network); 21 Jun 2001 05:45:33 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 21 Jun 2001 05:45:33 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CxDB-0006FP-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 21 Jun 2001 06:41:01 +0100 X-MSMail-Priority: Normal Received: from finch-post-12.mail.demon.net ([194.217.242.41]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CxD7-0006FK-00 for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 06:40:57 +0100 Received: from alg.demon.co.uk ([194.222.171.80]) by finch-post-12.mail.demon.net with esmtp (Exim 2.12 #1) id 15CxCR-000ORT-0C for rsgb_lf_group@blacksheep.org; Thu, 21 Jun 2001 05:40:15 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B3189F5.53FC11C7@alg.demon.co.uk> Date: Thu, 21 Jun 2001 06:45:25 +0100 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: LF: G4SPR/G6RO QSO References: Conversation <01bd55b2$e0097de0$0100007f@localhost> with last message <01bd55b2$e0097de0$0100007f@localhost> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: A long time ago (March 1998), Peter G3PLX wrote: > . . . Worked my neighbour G4SPR at Kirkby Stephen, about 40km > away, 559 both ways. Fred is better known for his caving VLF > activities. Well, I was pleased to learn that Fred G4SPR (Cumbria) is active again on 136 kHz! Ron G6RO had a QSO with Fred on Tuesday evening, exchanging RST 339/599 reports. I heard Ron's side of the QSO on my loop antenna, but the deep antenna null to the north of me meant that I had little chance of detecting Fred's signal. So - what gear are you using, Fred? (I wonder, were you loading the antenna with that big Proton Magnetometer coil?!) Regards to all, Steve GW4ALG From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29851 invoked from network); 20 Jun 2001 22:09:32 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 20 Jun 2001 22:09:32 -0000 Received: (qmail 8795 invoked from network); 20 Jun 2001 22:08:30 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 20 Jun 2001 22:08:30 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Cq63-0002cA-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Jun 2001 23:05:11 +0100 Received: from email.cwcom.net ([195.44.0.152] helo=cwcom.net) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Cq60-0002c5-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 23:05:08 +0100 Received: from computer ([195.44.16.123]) by cwcom.net with Microsoft SMTPSVC(5.5.1877.537.53); Wed, 20 Jun 2001 23:04:20 +0100 Message-ID: <001b01c0f9d5$d9406440$7b102cc3@computer> From: "Martin M5CIX" To: rsgb_lf_group@blacksheep.org References: <118.698000.285d4165@aol.com> <3B2D3DD4.D3E62691@ns.sympatico.ca> Subject: LF: Commercial TX for 136 Date: Wed, 20 Jun 2001 23:10:13 +0100 Organization: M5CIX / G8CIX MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I have heard that there is a company offering an off the shelf TX around £110. Am unable to track it down and was wodering if any one can confirm? Martin M5CIX From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1690 invoked from network); 20 Jun 2001 19:32:21 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 20 Jun 2001 19:32:21 -0000 Received: (qmail 10085 invoked from network); 20 Jun 2001 19:31:19 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 20 Jun 2001 19:31:19 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CnbN-0001Fy-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Jun 2001 20:25:21 +0100 Received: from picard.skynet.be ([195.238.3.131]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CnbF-0001Ft-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 20:25:13 +0100 Received: from mh70i ([62.4.219.245]) by picard.skynet.be (8.11.2/8.11.2/Skynet-OUT-2.11) with SMTP id f5KJOLY29358 for ; Wed, 20 Jun 2001 21:24:21 +0200 (MET DST) (envelope-from ) Message-ID: <000b01c0f9be$c4015ce0$f5db043e@mh70i> From: "DE BONDT WERNER" To: rsgb_lf_group@blacksheep.org Subject: LF: Statics? Date: Wed, 20 Jun 2001 21:25:27 +0200 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
 
I think we are all very lucky,we did not met the real thing .
Static must not be a problem for a radio ham, here we talk abt little current and some kilovolts.
But a strike ,direct on your antenna is something different.
If the antenna is grounded with a good ground.Avery rig that is in use ore even just plugged in, is damaged.
And if the antenna is not grounded,and the wire go to the shack,It will blow out the wall of your shack.
You just show the lightening the way ,even with a thin wire.
If we take the resistens of a wet wall, abt 1Meg, and a direct stroke some are 100 kilo-Amp with an nearly
unlimited voltage . I will not be the resistor.
But a 10mm copper bar can hold the 100 kilo-Amp fore a few ms.
I have a friend working on radio equipment of a ship.He sow the radio-room partly painted with solid copper
from the variometer, because the haveduty switch to bypass the variometer was open .
I have a tic wire from my vertical, and when I see thunder clouds I bring it to the base of the mast.away from the shack.
  
 Lets hope it never com in
 MNI  73 ON6ND Werner
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28481 invoked from network); 20 Jun 2001 15:24:13 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 20 Jun 2001 15:24:13 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 8118 invoked from network); 20 Jun 2001 15:23:13 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 20 Jun 2001 15:23:13 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Cjhg-0007p6-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Jun 2001 16:15:36 +0100 Received: from anchor-post-31.mail.demon.net ([194.217.242.89]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Cjhf-0007p0-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 16:15:35 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from telemetry.demon.co.uk ([194.222.19.114]) by anchor-post-31.mail.demon.net with smtp (Exim 2.12 #1) id 15Cji8-0008iI-0V for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 16:16:04 +0100 Message-ID: <2awXzCA50JM7MwyD@telemetry.demon.co.uk> Date: Wed, 20 Jun 2001 13:55:21 +0100 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: Re: LF: Re: Static effects In-reply-to: <7D653C9C42F5D411A27C00508BF8803D55C4FA@pdw-mail-r1.dstl.gov.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: Andy G4JNT wrote: > > >Use the formula Vrms = 4.44.F.N.A.B to calculate the Minimum turns >needed on any given core, using a B of around 0.1 Tesla for a good safety >margin. All non-gapped ferrites designed for SMPSU transformers will have >more than enough inductance - up in the tens to hundreds of milli-henries - >when wound with enough turns to satisfy this equation. > Thanks Andy. I suspect I am not the only one on this reflector who regards the design of cored inductors as something of a black art! 73, Tom G3OLB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11093 invoked from network); 20 Jun 2001 12:11:06 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 20 Jun 2001 12:11:06 -0000 Received: (qmail 4419 invoked from network); 20 Jun 2001 12:10:04 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 20 Jun 2001 12:10:04 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Cgk6-0006Ff-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Jun 2001 13:05:54 +0100 Received: from smtp.im.cz ([195.39.10.4] helo=email.seznam.cz) by post.thorcom.com with smtp (Exim 3.16 #2) id 15Cgk5-0006FX-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 13:05:53 +0100 Received: (qmail 7726 invoked from network); 20 Jun 2001 12:04:37 -0000 Received: from unknown (HELO p) (195.47.69.2) by smtp.im.cz with SMTP; 20 Jun 2001 12:04:37 -0000 Message-ID: <02af01c0f980$c75f1000$1601a8c0@maly.cz.gmc.net> From: "Petr Maly \(Seznam\)" To: rsgb_lf_group@blacksheep.org References: <3B3084F2.613D4874@usa.net> Subject: LF: Re: Re: Protection against lightning Date: Wed, 20 Jun 2001 14:01:39 +0200 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 have the experience with 150 m high T-ant. All the antenna works I did with the antenna grounded (you can see some details at http://www.sweb.cz/ok1fig/gallery.htm). Once I had to disconnect it and connect again to my small loading coil. It only burned slightly in my hand, nothing serious happened. No fireworks. I even did dare to connect RX EKD300 directly to loading coil, without any attenuation (normally I used 36 or 48 dB). RX survived and there was only a slight cross-modulation. But I am sure I wouldn't be so brave during summer period... 73 Petr OK1FIG ----- Original Message ----- From: Alberto di Bene To: Sent: Wednesday, June 20, 2001 1:11 PM Subject: LF: Re: Protection against lightning > > When he reached for the coax and his hand was > > still about 10cm from the coax there was a large arc (between hand and > > coax). > > I wonder what did happen when those brave souls disconnected > from ground the Decca mast at Puckeridge last year ?? :-) > > 73 Alberto I2PHD > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10734 invoked from network); 20 Jun 2001 12:10:58 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 20 Jun 2001 12:10:58 -0000 Received: (qmail 10926 invoked from network); 20 Jun 2001 12:09:59 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 20 Jun 2001 12:09:59 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CggQ-0006FN-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Jun 2001 13:02:06 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Cgfz-0006FI-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 13:01:39 +0100 Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 15CgfK-0002Ww-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 13:00:58 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.232.252] (helo=mj9ar) by gemini.herts.ac.uk with smtp (Exim 3.22 #2) id 15CgfJ-0006N3-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 13:00:57 +0100 From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Wed, 20 Jun 2001 13:02:08 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: Re: Protection against lightning In-reply-to: <3B3084F2.613D4874@usa.net> X-Mailer: Pegasus Mail for Win32 (v3.11) Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > I wonder what did happen when those brave souls disconnected > from ground the Decca mast at Puckeridge last year ?? :-) > > 73 Alberto I2PHD > Dear Alberto, LF group, I tried this - The Decca ant downlead was provided with a movable spark gap with 2 electrodes that could be shorted together when not in use. There did not seem to be any sparking when the gap was opened and closed. However, the weather was quite damp at the time of both expeditions, so probably not much chance for static to build up. I believe static on antennas can be caused by friction with the wind blowing past, so does not neccessarily need any thunderstorm activity to appear. I remember when flying kites as a yougster, getting small shocks off the line sometimes, even with clear skies. I also recall that it is an endemic problem with aircraft, which are often fitted with pointed discharging electrodes to prevent the charge building up excessively. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25062 invoked from network); 20 Jun 2001 11:38:18 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 20 Jun 2001 11:38:18 -0000 Received: (qmail 7061 invoked from network); 20 Jun 2001 11:37:57 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 20 Jun 2001 11:37:57 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CgDH-0005y7-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Jun 2001 12:31:59 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from mserv1f.u-net.net ([195.102.249.207] helo=mserv1f.vianw.co.uk) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CgD8-0005xs-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 12:31:50 +0100 Received: from [213.2.16.106] (helo=rsgb.org.uk) by mserv1f.vianw.co.uk with esmtp (Exim 3.22 #5) id 15CgCR-0000QI-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 12:31:08 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from miked by rsgb.org.uk with SMTP (MDaemon.PRO.v4.0.0.R) for ; Wed, 20 Jun 2001 12:16:28 +0100 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Wed, 20 Jun 2001 12:16:26 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: Re: Static effects Message-ID: <3B30941A.17545.A501A3@localhost> In-reply-to: <001501c0f8e5$640c49a0$6655872c@david> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-Return-Path: miked@mail X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: VE3TOK wrote: > My very thick coax was running true the living room to the shack and I > heard from time to time...tick... tick and my wife didn't know where it was > coming from...No storm was audible .. > Well it was.... little sparks jumping between the shield > and the inner conductor! > Also did see sparks jumping between the center of a PL259 connector > and the outside ring at other times!.. When I used to run a three-eighths-wave on 160m, tuned with an ex- broadcast receiver air-spaced variable capacitor, I would hear similar clicking noises when no obvious storm was present. This was caused by sparks across the capacitor. For any non-earthed antenna (my LF one is earthed through the matching transformer) I would advise using a bleed resistor of a few hundred kilohms to earth just to avoid this static build-up. 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 29848 invoked from network); 20 Jun 2001 11:31:46 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 20 Jun 2001 11:31:46 -0000 Received: (qmail 6308 invoked from network); 20 Jun 2001 11:31:34 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 20 Jun 2001 11:31:34 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Cg4z-0005pw-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Jun 2001 12:23:25 +0100 Received: from lepidachrosite.lion-access.net ([212.19.217.3]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Cg4x-0005pr-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 12:23:24 +0100 Received: from w8k3f0 (1Cust202.tnt1.rtm1.nl.uu.net [213.116.96.202]) by lepidachrosite.lion-access.net (I-Lab) with SMTP id EC3E6CAE54 for ; Wed, 20 Jun 2001 11:21:29 +0000 (GMT) Message-ID: <005001c0f97c$011fdc20$ca6074d5@w8k3f0> From: "Dick Rollema" To: rsgb_lf_group@blacksheep.org References: <000f01c0f8a6$b6efc3c0$f57674d5@w8k3f0> <15CVYp-0Pc1RIC@fwd07.sul.t-online.com> Subject: Re: LF: Protection against lightning Date: Wed, 20 Jun 2001 13:20:28 +0200 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 Uwe and All, Many thanks for your message that supports my own view. Interesting that your father also advocated to leave the aerial floating. That surprises me a bit because German broadcast transmitters in the twenties and perhaps early thirties ended their daily transmission with the warning "Bitte vergessen Sie nicht die Antenne zu erden!". 73, Dick, PA0SE ----- Oorspronkelijk bericht ----- Van: jannsen <0482183881-0001@t-online.de> Aan: Verzonden: woensdag 20 juni 2001 2:09 Onderwerp: Re: LF: Protection against lightning > Dick Rollema schrieb: > > To All from PA0SE > > > > Tom, G3OLB, wrote: > > > > >I suppose a better idea would be > > > to get into the habit of grounding the antenna when I leave the shack! > > > > When not in the shack I leave the aerial floating in the hope that it will > > be charged to the voltage potential of its surrounding so that lightning > > won't "see" it. > > Or is that a misconception? > > > > When grounded it could act as a lightning conductor and it certainly can't > > stand up to a stroke without causing heavy damage. > > > > 73, Dick, PA0SE > > > > > > > Hi Dick es all, > I`m 30 years on the "wireless" - job. I never grounded lw - antennas, neither > short ones nor long ones (400m straight or 1600m rhomboid). "after operation you > have to disconnect lws (incl wire dipoles) from all equipments but never ground > them" was an order of my father. that makes an other plus 30 years of > experience. the vicinity of the end of the wire (feeder) must be free of objects > for one metre. > > the sense was, ungrounded antennas (litze) never go down in conductivity. > > but if there are children or laymens (xyl) arround you have to ground them! > > regards > Uwe/dj8wx > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21470 invoked from network); 20 Jun 2001 11:27:39 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 20 Jun 2001 11:27:39 -0000 Received: (qmail 2898 invoked from network); 20 Jun 2001 11:27:28 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 20 Jun 2001 11:27:28 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Cg2M-0005pK-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Jun 2001 12:20:42 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Cg2L-0005pD-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 12:20:41 +0100 Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 15Cg1f-0001lD-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 12:19:59 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.232.252] (helo=mj9ar) by gemini.herts.ac.uk with smtp (Exim 3.22 #2) id 15Cg1e-0005tn-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 12:19:58 +0100 From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Wed, 20 Jun 2001 12:21:12 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: 73kHz beacon/antenna problems In-reply-to: <$HlFkHAs8EM7Mwi9@telemetry.demon.co.uk> References: X-Mailer: Pegasus Mail for Win32 (v3.11) Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > Jim, M0BMU wrote: > > > After lots of > >experimentation I ended up with only 75% of the original amount of > >wire I had in the air, but with about twice the original ERP for the same > >TX power. > > How do you know this Jim? By far field measurements? Surely there can be > no computer programme clever enough to take into account all the factors > you mention like leaves on trees, building proximity etc. > > 73, Tom G3OLB > > Dear Tom, LF Group, I wish there was a computer program that could do the job .... but I had to compare the antennas using actual field strength measurements. This involved a lot of driving around and setting up the measuring gear in odd places, mostly late at night, and got some very strange looks. Once, I was apprehended by a squad of security guards, who were convinced I was trying to eavesdrop on their radio communications for some dubious purpose - it took quite a lot of explaining away :-) The 71.924 kHz beacon ran OK last night from 0005 until 0310utc - I will give it a rest tonight, and try again tomorrow. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13196 invoked from network); 20 Jun 2001 11:24:44 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 20 Jun 2001 11:24:44 -0000 Received: (qmail 24606 invoked from network); 20 Jun 2001 11:23:40 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 20 Jun 2001 11:23:40 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Cfxy-0005o9-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Jun 2001 12:16:10 +0100 Received: from cmailg7.svr.pol.co.uk ([195.92.195.177]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Cfxx-0005o4-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 12:16:09 +0100 Received: from modem-122.annuminas.dialup.pol.co.uk ([62.136.116.250] helo=g3aqc) by cmailg7.svr.pol.co.uk with smtp (Exim 3.13 #0) id 15CfxF-00046r-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 12:15:26 +0100 Message-ID: <001e01c0f97a$5aaeb7e0$fa74883e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: Re. 73kHz beacon/ant.problems Date: Wed, 20 Jun 2001 12:15:10 +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
Hi Tom and Jim,
I can contribute to this discussion. I terminate all wires at least 2M from any leaves etc and notice no change when they are wet or dry,also no difference when the trees came into leaf. So hopefully this is a "safe" distance. However FS measurments at 3.3 Km indicate that only half the power fed to the ant. (current squared times calculated R res)  is radiated!  I dont think any greater spacing would help much,because the entire Ant system is enclosed by trees on all sides, a sort of Faraday shield Hi. I dont suppose my XYL, the local authority or anyone else would approve if I cut down all the trees, and if I did what would I hang all my Ants. on. 73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7496 invoked from network); 20 Jun 2001 11:20:43 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 20 Jun 2001 11:20:43 -0000 Received: (qmail 26804 invoked from network); 20 Jun 2001 11:20:32 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 20 Jun 2001 11:20:32 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CfvZ-0005o1-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Jun 2001 12:13:41 +0100 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 #2) id 15CfvW-0005nu-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 12:13:38 +0100 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 MAA202826 for ; Wed, 20 Jun 2001 12:03:20 +0100 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 (8.11.1m3/NCO v4.96) with ESMTP id f5KBCLf66698 for ; Wed, 20 Jun 2001 12:12:22 +0100 Message-ID: <3B3084F2.613D4874@usa.net> Date: Wed, 20 Jun 2001 13:11:46 +0200 From: "Alberto di Bene" 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: Protection against lightning 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: > When he reached for the coax and his hand was > still about 10cm from the coax there was a large arc (between hand and > coax). I wonder what did happen when those brave souls disconnected from ground the Decca mast at Puckeridge last year ?? :-) 73 Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12480 invoked from network); 20 Jun 2001 09:52:02 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 20 Jun 2001 09:52:02 -0000 Received: (qmail 22751 invoked from network); 20 Jun 2001 09:51:51 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 20 Jun 2001 09:51:51 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CeYb-00054X-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Jun 2001 10:45:53 +0100 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CeYZ-00054S-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 10:45:52 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id KAA22413; Wed, 20 Jun 2001 10:50:08 +0100 (BST) Received: (qmail 21433 invoked from network); 20 Jun 2001 10:38:14 -0000 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 20 Jun 2001 10:38:14 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: by gauntlet.mail.dera.gov.uk; id KAA14224; Wed, 20 Jun 2001 10:29:18 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma014125; Wed, 20 Jun 01 10:28:42 GMT Received: from mailex.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with SMTP id for ; Wed, 20 Jun 2001 10:53:53 +0100 Received: (qmail 27044 invoked from network); 20 Jun 2001 09:34:53 +0100 Received: from softdnserror (HELO cchecker.dstl.gov.uk) (192.168.248.52) by mailex.dstl.gov.uk with SMTP; 20 Jun 2001 08:34:53 -0000 Received: from FRN-MAIL-R1.dstl.gov.uk (unverified) by cchecker.dstl.gov.uk (Content Technologies SMTPRS 4.1.2) with ESMTP id for ; Wed, 20 Jun 2001 09:35:14 +0100 Received: by frn-mail-r1.dstl.gov.uk with Internet Mail Service (5.5.2650.21) id ; Wed, 20 Jun 2001 10:43:57 +0100 Message-ID: <7D653C9C42F5D411A27C00508BF8803D55C4FA@pdw-mail-r1.dstl.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: RE: LF: Re: Static effects Date: Wed, 20 Jun 2001 10:43:58 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) 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: But much better still a bleed choke, making sure the inductance is high enough not to affect the matching. A good choke would be made from a ferrite core and as it is not carrying any power a smaller core can be used than would be the case for a matching transformer. Make sure there are enough turns to not saturate the ferrite with the highest RF voltage present. Saturation was almost certainly the case in an earlier posting where a choke 'got hot'. Use the formula Vrms = 4.44.F.N.A.B to calculate the Minimum turns needed on any given core, using a B of around 0.1 Tesla for a good safety margin. All non-gapped ferrites designed for SMPSU transformers will have more than enough inductance - up in the tens to hundreds of milli-henries - when wound with enough turns to satisfy this equation. Andy G4JNT > -----Original Message----- > From: Tom Boucher [mailto:tom@telemetry.demon.co.uk] > Sent: 2001-06-20 08:40 > To: rsgb_lf_group@blacksheep.org > Subject: Re: LF: Re: Static effects > > > > Dave G3YMC wrote: > > > >If you feed your antenna, as many do, via a matching > transformer (3C85 core) > >then the > >antenna and the line to the tx/rx will be automatically > grounded. Another > >advantage > >of this method of feeding antennas. > > Well I do Dave but I have rather an odd T/R relay arrangement based on > single pole on/off relays which I had available. This means > that when Tx > supply is switched off, the antenna is connected to neither > transmitter > nor receiver. > > I didn't fit a bleed resistor as Andy suggests because I figured it > would have to dissipate a fair bit of power unless it was a > high value, > however even a high value will be adequate to discharge any > build up of > static, I guess. > > 73, Tom > -- 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 19040 invoked from network); 20 Jun 2001 09:42:44 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 20 Jun 2001 09:42:44 -0000 Received: (qmail 11684 invoked from network); 20 Jun 2001 09:42:29 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 20 Jun 2001 09:42:29 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CeOP-0004xE-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Jun 2001 10:35:21 +0100 Received: from siaag1aa.compuserve.com ([149.174.40.3]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CeNx-0004w4-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 10:34:54 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (from mailgate@localhost) by siaag1aa.compuserve.com (8.9.3/8.9.3/SUN-1.9) id FAA00423 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 05:34:10 -0400 (EDT) Date: Wed, 20 Jun 2001 05:33:41 -0400 From: "Holger 'Geri' Kinzel, DK8KW" Subject: LF: Static effects To: rsgb_lf_group@blacksheep.org Message-ID: <200106200534_MC3-D657-2E07@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: Alan, G3NYK wrote >Being a coward, I ensure that if possible, the end of the aerial is outside >the house and grounded during a storm. ... I do this each time, not only during a storm but each time when I don't use the antenna. See my homepage (http://www.qru.de/station.htm, about half way down on the right hand side) for a picture of the heavy duty switch. The ground part of the switch is led by a large diameter (16 square mm) aluminium wire to a 4m deep ground rod. I know that doing this my LF antenna is part of my lightning protection system and I know that it surely will not survive a real striking lightning. But static charges and minor charges from nearby hits are directly led into the ground, hopefully protecting my house and the gear in my shack. Best 73 Geri, DK8KW (W1KW) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17591 invoked from network); 20 Jun 2001 09:12:36 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 20 Jun 2001 09:12:36 -0000 Received: (qmail 11311 invoked from network); 20 Jun 2001 09:12:22 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 20 Jun 2001 09:12:22 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Cdwt-0004hz-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Jun 2001 10:06:55 +0100 Received: from [204.202.140.198] (helo=webmailmta.go.com) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Cdwr-0004hu-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 10:06:54 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gomailjtp01 ([10.212.0.161]) by mta06.seamail.go.com (Sun Internet Mail Server sims.4.0.2000.10.12.16.25.p8) with ESMTP id <0GF8009B51A7C8@mta06.seamail.go.com> for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 02:06:07 -0700 (PDT) Date: Wed, 20 Jun 2001 02:06:08 -0700 (PDT) From: "John Sexton" Subject: Re: LF: Protection against lightning To: rsgb_lf_group@blacksheep.org Message-ID: <3540787.993027968816.JavaMail.computernetworks@gomailjtp01> MIME-Version: 1.0 X-Mailer: GoMail 3.0.0 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: Hi Tom, Very amusing :-) for us Brits, but if we had to write our emails in German, I bet we'd make many more howlers, hi :-( Nevertheless great fun. John, G4CNN And before Andy complains - the original message is not included by my email service (probably a setup parameter somewhere) and in any case in my opinion it is just a lot of clutter. That should start an argument! ___________________________________________________ GO.com Mail Get Your Free, Private E-mail at http://mail.go.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8305 invoked from network); 20 Jun 2001 08:53:43 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 20 Jun 2001 08:53:43 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 22547 invoked from network); 20 Jun 2001 08:53:29 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 20 Jun 2001 08:53:29 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Cdec-0004Y5-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Jun 2001 09:48:02 +0100 Received: from finch-post-10.mail.demon.net ([194.217.242.38]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CdeY-0004Y0-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 09:47:58 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from telemetry.demon.co.uk ([194.222.19.114]) by finch-post-10.mail.demon.net with smtp (Exim 2.12 #1) id 15Cddp-000Icq-0A for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 08:47:13 +0000 Message-ID: Date: Wed, 20 Jun 2001 08:40:10 +0100 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: Re: LF: Re: Static effects In-reply-to: <001b01c0f958$1fba1160$059e01d5@dave> 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: Dave G3YMC wrote: > >If you feed your antenna, as many do, via a matching transformer (3C85 core) >then the >antenna and the line to the tx/rx will be automatically grounded. Another >advantage >of this method of feeding antennas. Well I do Dave but I have rather an odd T/R relay arrangement based on single pole on/off relays which I had available. This means that when Tx supply is switched off, the antenna is connected to neither transmitter nor receiver. I didn't fit a bleed resistor as Andy suggests because I figured it would have to dissipate a fair bit of power unless it was a high value, however even a high value will be adequate to discharge any build up of static, I guess. 73, Tom From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10278 invoked from network); 20 Jun 2001 08:36:25 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 20 Jun 2001 08:36:25 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 4731 invoked from network); 20 Jun 2001 08:35:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 20 Jun 2001 08:35:23 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CdMl-0004P1-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Jun 2001 09:29:35 +0100 Received: from tele-post-20.mail.demon.net ([194.217.242.20]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CdMj-0004Or-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 09:29:34 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from telemetry.demon.co.uk ([194.222.19.114]) by tele-post-20.mail.demon.net with smtp (Exim 2.12 #2) id 15CdM3-0006yv-0K for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 08:28:52 +0000 Message-ID: Date: Wed, 20 Jun 2001 08:27:42 +0100 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: Re: LF: Protection against lightning In-reply-to: <15CVYp-0Pc1RIC@fwd07.sul.t-online.com> 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: DJ8WX wrote: >but if there are children or laymens (xyl) arround you have to ground them! > Thanks Uwe. I will make sure I ground my XYL! 73, Tom G3OLB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3575 invoked from network); 20 Jun 2001 08:36:12 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 20 Jun 2001 08:36:12 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 4567 invoked from network); 20 Jun 2001 08:36:02 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 20 Jun 2001 08:36:02 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CdMl-0004P2-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Jun 2001 09:29:35 +0100 Received: from tele-post-20.mail.demon.net ([194.217.242.20]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CdMj-0004Os-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 09:29:34 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from telemetry.demon.co.uk ([194.222.19.114]) by tele-post-20.mail.demon.net with smtp (Exim 2.12 #2) id 15CdM4-0006ys-0K for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 08:28:52 +0000 Message-ID: <$HlFkHAs8EM7Mwi9@telemetry.demon.co.uk> Date: Wed, 20 Jun 2001 08:22:20 +0100 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: Re: LF: 73kHz beacon/antenna problems In-reply-to: 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: Jim, M0BMU wrote: > After lots of >experimentation I ended up with only 75% of the original amount of >wire I had in the air, but with about twice the original ERP for the >same TX power. How do you know this Jim? By far field measurements? Surely there can be no computer programme clever enough to take into account all the factors you mention like leaves on trees, building proximity etc. 73, Tom G3OLB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25336 invoked from network); 20 Jun 2001 08:01:19 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 20 Jun 2001 08:01:19 -0000 Received: (qmail 324 invoked from network); 20 Jun 2001 08:01:08 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 20 Jun 2001 08:01:08 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CcpY-000438-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Jun 2001 08:55:16 +0100 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CcpU-000433-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 08:55:12 +0100 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 JAA1379686 for ; Wed, 20 Jun 2001 09:54:32 +0200 Message-ID: <3.0.1.16.20010620085451.2c5f1012@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 Jun 2001 08:54:51 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: static build up on aerials In-reply-to: <001e01c0f8a4$848afc80$7f5c7ad5@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: All the discussions about static build up remind me of something that happened abt. 20 years ago when I was quite active in HF contesting : We were putting up some antennas at the club station to run one of the major contests. One of our club members worked for a contructor and could convince him to put 2 mobile towers (cranes) near the clubhouse, each 50m high and 100m apart so we could place a 160m dipole at 50m above ground (would have been a nice LF antenna). The coax end of the coax was laying on the roof of a (polyester) caravan when one of the club members wanted to connect it to the tranceiver. When he reached for the coax and his hand was still about 10cm from the coax there was a large arc (between hand and coax). He hadn't any burns, so current must have been minimal, but it was quite impressive (the poor guy wasn't seen near any coax cable for a long time). The above occured on a calm winter day, no thunderstorm arround, so imagine what statics can built up in summer. Based on that I decided never ever to leave a coax connected to a 'floating' wire antenna in the shack. The arcs probably won't hurt anyone, but they could start a fire. 73, Rik ON7YD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24973 invoked from network); 20 Jun 2001 07:19:03 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 20 Jun 2001 07:19:03 -0000 Received: (qmail 17426 invoked from network); 20 Jun 2001 07:18:05 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 20 Jun 2001 07:18:05 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Cc8b-0003ny-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Jun 2001 08:10:53 +0100 Received: from rhenium.btinternet.com ([194.73.73.93] helo=rhenium) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Cc8X-0003nO-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 08:10:49 +0100 Received: from [213.1.158.5] (helo=dave) by rhenium with smtp (Exim 3.22 #9) id 15Cc7s-0007Im-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 08:10:09 +0100 Message-ID: <001b01c0f958$1fba1160$059e01d5@dave> From: "Dave Sergeant" To: "rsgb_lf_group" References: <000201c0f8e3$74c7f520$736401d5@default> Subject: LF: Re: Static effects Date: Wed, 20 Jun 2001 08:09:04 +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: >From Dave G3YMC If you feed your antenna, as many do, via a matching transformer (3C85 core) then the antenna and the line to the tx/rx will be automatically grounded. Another advantage of this method of feeding antennas. My receive converter also has link coupling at its input. Cheers Dave dsergeant@iee.org dsergeant@connectfree.co.uk http://www.dsergeant.btinternet.co.uk From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29368 invoked from network); 20 Jun 2001 00:15:58 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 20 Jun 2001 00:15:58 -0000 Received: (qmail 25688 invoked from network); 20 Jun 2001 00:15:44 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 20 Jun 2001 00:15:44 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CVZV-0000QH-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 20 Jun 2001 01:10:13 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from mailout02.sul.t-online.com ([194.25.134.17] helo=mailout02.sul.t-online.de) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CVZU-0000QC-00 for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2001 01:10:12 +0100 Received: from fwd07.sul.t-online.de by mailout02.sul.t-online.de with smtp id 15CVYq-00026A-00; Wed, 20 Jun 2001 02:09:32 +0200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from (0482183881-0001@[62.226.237.7]) by fwd07.sul.t-online.com with smtp id 15CVYp-0Pc1RIC; Wed, 20 Jun 2001 02:09:31 +0200 From: "jannsen" <0482183881-0001@t-online.de> To: rsgb_lf_group@blacksheep.org References: <000f01c0f8a6$b6efc3c0$f57674d5@w8k3f0> Subject: Re: LF: Protection against lightning 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, 20 Jun 2001 02:09:31 +0200 Message-ID: <15CVYp-0Pc1RIC@fwd07.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: Dick Rollema schrieb: > To All from PA0SE > > Tom, G3OLB, wrote: > > >I suppose a better idea would be > > to get into the habit of grounding the antenna when I leave the shack! > > When not in the shack I leave the aerial floating in the hope that it will > be charged to the voltage potential of its surrounding so that lightning > won't "see" it. > Or is that a misconception? > > When grounded it could act as a lightning conductor and it certainly can't > stand up to a stroke without causing heavy damage. > > 73, Dick, PA0SE > > > Hi Dick es all, I`m 30 years on the "wireless" - job. I never grounded lw - antennas, neither short ones nor long ones (400m straight or 1600m rhomboid). "after operation you have to disconnect lws (incl wire dipoles) from all equipments but never ground them" was an order of my father. that makes an other plus 30 years of experience. the vicinity of the end of the wire (feeder) must be free of objects for one metre. the sense was, ungrounded antennas (litze) never go down in conductivity. but if there are children or laymens (xyl) arround you have to ground them! regards Uwe/dj8wx From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4121 invoked from network); 19 Jun 2001 22:48:31 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 19 Jun 2001 22:48:31 -0000 Received: (qmail 6004 invoked from network); 19 Jun 2001 22:47:31 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 19 Jun 2001 22:47:31 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CUC6-0008Ix-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Jun 2001 23:41:58 +0100 X-MSMail-Priority: Normal Received: from jubilee.ns.sympatico.ca ([142.177.1.6] helo=mail-ns00s0.ns.sympatico.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CUC5-0008Is-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Jun 2001 23:41:58 +0100 Received: from ns.sympatico.ca ([142.177.91.98]) by mail-ns00s0.ns.sympatico.ca (Post.Office MTA v3.5.3 release 223 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Tue, 19 Jun 2001 19:40:33 -0300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B300E3F.4070BAEB@ns.sympatico.ca> Date: Tue, 19 Jun 2001 22:45:19 -0400 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: 73kHz beacon/antenna problems 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 Jim , I'll be watching 73 de John VE1ZJ James Moritz wrote: > Dear LF group, > > Thanks to those who have been looking for my 73kHz beacon > signal, and to Ko, NL9222, for the screen shot. I have been unable > to run the 73kHz beacon for the last couple of days, due to > problems with the antenna, or rather the loading coil. The > increased power level I have been using has made the coil run > much hotter (it is probably dissipating 200 - 300W with the key > down), and this together with the tension in the wire has caused > the PVC tube former to shrink. This in turn caused the windings to > come loose, and made it impossible to maintain the antenna in tune > due to changing inductance and arcing between turns. I have fixed > the problem with the aid of tape and a cooling fan, but this can only > be a temporary solution - a more efficient 73kHz loading coil is now > on the list of things to do. > > Assuming there are no further problems, I hope to run the beacon > tonight, from 0000 - 0300 utc, on 71.924kHz again. > > I can confirm some of G3XDV's observations about trimming > antennas - I went through a similar excercise about a year ago. > Having a larger top load on an antenna is an advantage in that > voltage is reduced, effective height is slightly increased, and > smaller loading coils are required, which have less critical tuning. > G3AQC has shown that under his circumstances, increasing the > top loading can significantly reduce losses. However, if the top > loading wires run close to trees and buildings, increased losses > may outweigh the benefits. Also, the physical height of the antenna > may be reduced by the sag in the longer wires. After lots of > experimentation I ended up with only 75% of the original amount of > wire I had in the air, but with about twice the original ERP for the > same TX power. Obviously, there is a best compromise for each > individual situation. > > Cheers, Jim Moritz > 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9015 invoked from network); 19 Jun 2001 19:17:08 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 19 Jun 2001 19:17:08 -0000 Received: (qmail 29850 invoked from network); 19 Jun 2001 19:16:11 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 19 Jun 2001 19:16:11 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CQtk-0006U4-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Jun 2001 20:10:48 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from [167.142.226.22] (helo=smtp-out.netins.net) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CQtg-0006Tz-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Jun 2001 20:10:44 +0100 Received: from netins.net (desm-32-118.dsl.netins.net [167.142.32.118]) by smtp-out.netins.net (8.9.3/8.9.3) with ESMTP id OAA17400; Tue, 19 Jun 2001 14:10:02 -0500 (CDT) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B2FA388.E4ADBAB1@netins.net> Date: Tue, 19 Jun 2001 14:10:00 -0500 From: "Dr. Tom Gruis" Organization: =?iso-8859-1?Q?www.gruis.org_&_K=D8HTF?= X-Sender: "Dr. Tom Gruis" <@smtp.netins.net> (Unverified) X-Mailer: Mozilla 4.76 [en]C-gatewaynet (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re: Static effects References: <000201c0f8e3$74c7f520$736401d5@default> <001501c0f8e5$640c49a0$6655872c@david> 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 from Iowa in the US - EN31! As a personal opinion and preference and based on a long period of time of radio experimentation, NEVER have ANY antenna without some type of a DC path to ground at ALL times! Static drain resistors are a must, unless the whole antenna is at earth potential as in the case of a VHF J-pole or such. Spark gaps are good. Neon lamps are good. Grounding switches are good. Etc... Remember, if the lightning bolt can jump a mile or three through the atmosphere, a few inches, or a number of feet, ot even most insulation will be effectively a non impediment to the strike. If there is a direct hit - then that is apt to be that! I have worked at many broadcast stations, AM, FM, and TV and have been near the tower when it/they have been struck. They are "built to take it." Usually I have felt very safe there. But such massive structures and extensive ground arrays are not likely to be found in the amateur/experimenter sector! The incident of old Ben Franklin and his flying a kite in an electrical storm illustrates many scientific principles, to be sure. One other and usually overlooked principle is that of blind luck!!! 73, Doc. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26497 invoked from network); 19 Jun 2001 18:36:42 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 19 Jun 2001 18:36:42 -0000 Received: (qmail 21916 invoked from network); 19 Jun 2001 18:36:25 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 19 Jun 2001 18:36:25 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CQGo-0006Cz-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Jun 2001 19:30:34 +0100 Received: from tor-smtp4.attcanada.ca ([207.181.101.72] helo=attcanada.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CQGj-0006Cu-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Jun 2001 19:30:29 +0100 Received: from david (ham-on54-161.netcom.ca [142.154.69.33]) by attcanada.ca (8.8.7-s-4/8.8.7) with SMTP id OAA09445 for ; Tue, 19 Jun 2001 14:29:46 -0400 (EDT) Message-ID: <001501c0f8e5$640c49a0$6655872c@david> From: "Tenty" To: rsgb_lf_group@blacksheep.org References: <000201c0f8e3$74c7f520$736401d5@default> Subject: LF: Re: Static effects Date: Tue, 19 Jun 2001 18:29:24 +0100 Organization: Holland Data and Wireless 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 6.00.2462.0000 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 had this problem when I was still living in the Netherlands and my antenna for HF was on top of a 13 story building.. My very thick coax was running true the living room to the shack and I heard from time to time...tick... tick and my wife didn't know where it was coming from...No storm was audible .. Well it was.... little sparks jumping between the shield and the inner conductor! Also did see sparks jumping between the center of a PL259 connector and the outside ring at other times!.. So be aware! 73, Bob ve3tok / pa0tok ----- Original Message ----- From: "Alan Melia" To: "LF-Group" Sent: June 19, 2001 14:48 PM Subject: LF: Static effects Hi All, I am not too sure about Dick's theory. During a period when electrically charged clouds are passing overhead there are extremely high vertical gradients. Imagine a cloud at 3000m charged to 900kV (a modest amount) .....underneath it there would be a gradient of 300V /m thus a wire at 10m would acquire a charge of 3kV wrt gound (This may be modified by the fact the the cloud will induce an equal and opposite charge in the ground so the field may be 600V/m) Thus even Dick's floating wire will become charged up to about 3kV and a 600pF cap charged to 3kV makes quite a nice flash when shorted. I have certainly seem little sparks bridging from a disconnected aerial wire to earthed metallic trunking and central heating radiators, even when there was no storm audible. This is why TV braid breaker filters have a bleeder resistor installed. Rik's bleeder resistors would do the job nicely. Being a coward, I ensure that if possible, the end of the aerial is outside the house and grounded during a storm. This is probably one time when lossy wet trees around the aerial are a positive benefit !! Cheers de Alan G3NYK Alan.Melia@btinternet.com Cheers de Alan G3NYK From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21520 invoked from network); 19 Jun 2001 17:22:33 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 19 Jun 2001 17:22:33 -0000 Received: (qmail 6650 invoked from network); 19 Jun 2001 17:21:36 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 19 Jun 2001 17:21:36 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CP6P-0005ZH-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Jun 2001 18:15:45 +0100 X-MSMail-Priority: Normal Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CP6L-0005ZC-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Jun 2001 18:15:41 +0100 Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 15CP5h-0007X1-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Jun 2001 18:15:01 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.232.252] (helo=mj9ar) by gemini.herts.ac.uk with smtp (Exim 3.22 #2) id 15CP5g-0000L5-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Jun 2001 18:15:00 +0100 From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Tue, 19 Jun 2001 18:16:13 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: 73kHz beacon/antenna problems X-Mailer: Pegasus Mail for Win32 (v3.11) Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF group, Thanks to those who have been looking for my 73kHz beacon signal, and to Ko, NL9222, for the screen shot. I have been unable to run the 73kHz beacon for the last couple of days, due to problems with the antenna, or rather the loading coil. The increased power level I have been using has made the coil run much hotter (it is probably dissipating 200 - 300W with the key down), and this together with the tension in the wire has caused the PVC tube former to shrink. This in turn caused the windings to come loose, and made it impossible to maintain the antenna in tune due to changing inductance and arcing between turns. I have fixed the problem with the aid of tape and a cooling fan, but this can only be a temporary solution - a more efficient 73kHz loading coil is now on the list of things to do. Assuming there are no further problems, I hope to run the beacon tonight, from 0000 - 0300 utc, on 71.924kHz again. I can confirm some of G3XDV's observations about trimming antennas - I went through a similar excercise about a year ago. Having a larger top load on an antenna is an advantage in that voltage is reduced, effective height is slightly increased, and smaller loading coils are required, which have less critical tuning. G3AQC has shown that under his circumstances, increasing the top loading can significantly reduce losses. However, if the top loading wires run close to trees and buildings, increased losses may outweigh the benefits. Also, the physical height of the antenna may be reduced by the sag in the longer wires. After lots of experimentation I ended up with only 75% of the original amount of wire I had in the air, but with about twice the original ERP for the same TX power. Obviously, there is a best compromise for each individual situation. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5794 invoked from network); 19 Jun 2001 17:21:46 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 19 Jun 2001 17:21:46 -0000 Received: (qmail 6642 invoked from network); 19 Jun 2001 17:21:36 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 19 Jun 2001 17:21:36 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CP7y-0005ZO-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Jun 2001 18:17:22 +0100 Received: from rhenium.btinternet.com ([194.73.73.93] helo=rhenium) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CP7x-0005ZJ-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Jun 2001 18:17:21 +0100 Received: from [213.1.100.115] (helo=default) by rhenium with smtp (Exim 3.22 #9) id 15CP7I-0004xj-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Jun 2001 18:16:40 +0100 Message-ID: <000201c0f8e3$74c7f520$736401d5@default> From: "Alan Melia" To: "LF-Group" Subject: LF: Static effects Date: Tue, 19 Jun 2001 14:48:35 +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 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 am not too sure about Dick's theory. During a period when electrically charged clouds are passing overhead there are extremely high vertical gradients. Imagine a cloud at 3000m charged to 900kV (a modest amount) .....underneath it there would be a gradient of 300V /m thus a wire at 10m would acquire a charge of 3kV wrt gound (This may be modified by the fact the the cloud will induce an equal and opposite charge in the ground so the field may be 600V/m) Thus even Dick's floating wire will become charged up to about 3kV and a 600pF cap charged to 3kV makes quite a nice flash when shorted. I have certainly seem little sparks bridging from a disconnected aerial wire to earthed metallic trunking and central heating radiators, even when there was no storm audible. This is why TV braid breaker filters have a bleeder resistor installed. Rik's bleeder resistors would do the job nicely. Being a coward, I ensure that if possible, the end of the aerial is outside the house and grounded during a storm. This is probably one time when lossy wet trees around the aerial are a positive benefit !! Cheers de Alan G3NYK Alan.Melia@btinternet.com Cheers de Alan G3NYK From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11661 invoked from network); 19 Jun 2001 14:57:18 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 19 Jun 2001 14:57:18 -0000 Received: (qmail 18237 invoked from network); 19 Jun 2001 14:56:21 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 19 Jun 2001 14:56:21 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CMpm-0004JW-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Jun 2001 15:50:26 +0100 X-MSMail-Priority: Normal Received: from gateg.kw.bbc.co.uk ([132.185.132.16]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CMpi-0004JR-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Jun 2001 15:50:23 +0100 Received: from sunf0.rd.bbc.co.uk (ddmailgate.rd.bbc.co.uk [132.185.128.104]) by gateg.kw.bbc.co.uk (8.11.2/8.11.2) with SMTP id f5JEnfA05829 for ; Tue, 19 Jun 2001 15:49:41 +0100 (BST) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from pc523 by sunf0.rd.bbc.co.uk; Tue, 19 Jun 01 15:49:40 BST Message-ID: <3.0.5.32.20010619154936.010d1060@pop3> X-Sender: simonlh@pop3 X-Mailer: QUALCOMM Windows Eudora Pro Version 3.0.5 (32) Date: Tue, 19 Jun 2001 15:49:36 +0100 To: rsgb_lf_group@blacksheep.org From: "Simon Lloyd-Hughes" Subject: Re: LF: Need In-reply-to: <3B222609.F4122492@netscapeonline.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: If its the one with the unswitch preamp I believe I have. The main problem I had with mine was the bias transistor BD129 ( I think) going open circuit. This lead to distortion on the output. Only one person complained ( gave an honest signal report). The amplifier did have problems with rf getting onto the power leads. I had to put in a suitable filter. I bypassed the preamp with my own design. When I get home I'll try and find it in the attic. At 14:35 09/06/01 +0100, you wrote: >Hi All >Sorry not LF. >Does anyone have a cct diagram of a Microwave Modules 2m 100w lin amp >type >MML 144/100-S. >Your help would be much appreciated and if possible send it as an >attachment to me direct on here. My amp has a fault and a diagram would >speed the repair up instead of having to trace the cct. >Thanks in advance. >de Mal/G3KEV/Scarborough > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28674 invoked from network); 19 Jun 2001 10:23:18 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 19 Jun 2001 10:23:18 -0000 Received: (qmail 24111 invoked from network); 19 Jun 2001 10:23:01 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 19 Jun 2001 10:23:01 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CISx-0001p6-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Jun 2001 11:10:35 +0100 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CISw-0001p1-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Jun 2001 11:10:34 +0100 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 MAA1004000 for ; Tue, 19 Jun 2001 12:09:49 +0200 Message-ID: <3.0.1.16.20010619111010.0b3fa932@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, 19 Jun 2001 11:10:10 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: RE: SWR Bridge Diode Failures In-reply-to: <7D653C9C42F5D411A27C00508BF8803D55C4F3@pdw-mail-r1.dstl.go v.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: I am using a bleed resistor (2 times 47k/2W in parallel). The resistors get handwarm after a long QRSS session (at 350W RF), they consume less than 1W (there goes another 0.01dB of my signal). I tried a choke but even a 20mH choke affected the antenna resonance too much and got pretty hot while transmitting so I trew it out. For savety reasons the antenna is grounded when I am not QRV on 136, especialy in summer. 73, Rik ON7YD At 10:26 19/06/01 +0100, you wrote: >Wouldn't you be better off feeding a bleed resistor as well, to stop the >static building up in the first place ? >Or better still, a choke to make sure there is a proper DC path. > >Andy G4JNT > >> I have now fitted a 300 VRMS varistor (capable of passing 8000 amps >> peak!) across the antenna connector on the SWR bridge. Nothing will >> protect against a direct strike but perhaps this will >> discharge some of >> the static build up on my 1100 ft wire. > > >-- >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 15718 invoked from network); 19 Jun 2001 10:11:47 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 19 Jun 2001 10:11:47 -0000 Received: (qmail 14489 invoked from network); 19 Jun 2001 10:10:50 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 19 Jun 2001 10:10:50 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CIFM-0001m2-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Jun 2001 10:56:32 +0100 Received: from rubellite.lion-access.net ([212.19.217.4]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CIFL-0001lc-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Jun 2001 10:56:31 +0100 Received: from w8k3f0 (1Cust222.tnt3.rtm1.nl.uu.net [213.116.100.222]) by rubellite.lion-access.net (I-Lab) with SMTP id E1C082A90 for ; Tue, 19 Jun 2001 09:55:12 +0000 (GMT) Message-ID: <000f01c0f8a6$b6efc3c0$f57674d5@w8k3f0> From: "Dick Rollema" To: rsgb_lf_group@blacksheep.org References: Subject: LF: Protection against lightning Date: Tue, 19 Jun 2001 11:59:53 +0200 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 Tom, G3OLB, wrote: >I suppose a better idea would be > to get into the habit of grounding the antenna when I leave the shack! When not in the shack I leave the aerial floating in the hope that it will be charged to the voltage potential of its surrounding so that lightning won't "see" it. Or is that a misconception? When grounded it could act as a lightning conductor and it certainly can't stand up to a stroke without causing heavy damage. 73, Dick, PA0SE From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5225 invoked from network); 19 Jun 2001 09:57:23 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 19 Jun 2001 09:57:23 -0000 Received: (qmail 5341 invoked from network); 19 Jun 2001 09:57:03 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 19 Jun 2001 09:57:03 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CI6D-0001dq-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Jun 2001 10:47:05 +0100 Received: from rhenium.btinternet.com ([194.73.73.93] helo=rhenium) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CI69-0001dl-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Jun 2001 10:47:02 +0100 Received: from [213.122.214.184] (helo=default) by rhenium with smtp (Exim 3.22 #9) id 15CI5S-00022s-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Jun 2001 10:46:19 +0100 Message-ID: <001e01c0f8a4$848afc80$7f5c7ad5@default> From: "Alan Melia" To: "LF-Group" Subject: LF: static build up on aerials Date: Tue, 19 Jun 2001 10:40:20 +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 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, Tom mentioned damage to the diodes in his SWR bridge, the possible damage to the RX front end doesnt bear thinking about. On this front I recently found a source of the small wire-ended neons that I am sure we all were familiar with wired across the input transformers of Command Receivers and the like (I'm showing my age again !!) Neons take a few millisecs to fire but anyone who has them fitted with be aware of the little flashes with a non-earthed aerial that occur even when there is not any nearby thunder. I think they fire at about 70v. The neons are order code Z2459 from Greenweld at £2-50 for 10 www.greenweld.co.uk from the March 2001 cat. They often have odd values of high voltage (250V to 1kV) capacitors at reasonable prices. 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 20887 invoked from network); 19 Jun 2001 09:35:30 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 19 Jun 2001 09:35:30 -0000 Received: (qmail 18458 invoked from network); 19 Jun 2001 09:35:13 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 19 Jun 2001 09:35:13 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CHoI-0001Oa-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Jun 2001 10:28:34 +0100 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CHoD-0001OV-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Jun 2001 10:28:30 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id KAA23306; Tue, 19 Jun 2001 10:32:40 +0100 (BST) Received: (qmail 8075 invoked from network); 19 Jun 2001 10:20:50 -0000 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 19 Jun 2001 10:20:50 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: by gauntlet.mail.dera.gov.uk; id KAA29550; Tue, 19 Jun 2001 10:11:58 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma029499; Tue, 19 Jun 01 10:11:49 GMT Received: from mailex.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with SMTP id for ; Tue, 19 Jun 2001 10:36:46 +0100 Received: (qmail 17667 invoked from network); 19 Jun 2001 09:17:52 +0100 Received: from softdnserror (HELO cchecker.dstl.gov.uk) (192.168.248.52) by mailex.dstl.gov.uk with SMTP; 19 Jun 2001 08:17:52 -0000 Received: from FRN-MAIL-R1.dstl.gov.uk (unverified) by cchecker.dstl.gov.uk (Content Technologies SMTPRS 4.1.2) with ESMTP id for ; Tue, 19 Jun 2001 09:18:14 +0100 Received: by frn-mail-r1.dstl.gov.uk with Internet Mail Service (5.5.2650.21) id ; Tue, 19 Jun 2001 10:26:55 +0100 Message-ID: <7D653C9C42F5D411A27C00508BF8803D55C4F3@pdw-mail-r1.dstl.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: SWR Bridge Diode Failures Date: Tue, 19 Jun 2001 10:26:56 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) 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: Wouldn't you be better off feeding a bleed resistor as well, to stop the static building up in the first place ? Or better still, a choke to make sure there is a proper DC path. Andy G4JNT > I have now fitted a 300 VRMS varistor (capable of passing 8000 amps > peak!) across the antenna connector on the SWR bridge. Nothing will > protect against a direct strike but perhaps this will > discharge some of > the static build up on my 1100 ft wire. -- 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 17944 invoked from network); 19 Jun 2001 08:48:36 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 19 Jun 2001 08:48:36 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 17437 invoked from network); 19 Jun 2001 08:48:17 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 19 Jun 2001 08:48:17 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CGwg-0000yk-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Jun 2001 09:33:10 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from anchor-post-32.mail.demon.net ([194.217.242.90]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CGwb-0000yc-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Jun 2001 09:33:06 +0100 Received: from telemetry.demon.co.uk ([194.222.19.114]) by anchor-post-32.mail.demon.net with smtp (Exim 2.12 #1) id 15CGwV-0001KD-0W for rsgb_lf_group@blacksheep.org; Tue, 19 Jun 2001 09:33:00 +0100 Message-ID: Date: Tue, 19 Jun 2001 07:44:17 +0100 To: "RSGB LF Group" From: "Tom Boucher" Subject: LF: SWR Bridge Diode Failures 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 LFers A while ago I had an unexplained failure of the diodes in my LF SWR bridge. These were high voltage, fast diodes and I put it down to some kind of random failure. Last week end I noticed the SWR meter was again not working and found that the diodes had failed again. Bit puzzled until my wife mentioned there had been a thunderstorm while I was away! My long wire antenna is not dc grounded and is resonated on 136 by a simple series variometer. Also the T/R relay is wired such that there is no DC path from antenna to ground when power to Tx is off. The capacitive divider in the bridge had obviously arced across with static build up. I have now fitted a 300 VRMS varistor (capable of passing 8000 amps peak!) across the antenna connector on the SWR bridge. Nothing will protect against a direct strike but perhaps this will discharge some of the static build up on my 1100 ft wire. I suppose a better idea would be to get into the habit of grounding the antenna when I leave the shack! 73, Tom G3OLB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9244 invoked from network); 19 Jun 2001 07:21:50 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 19 Jun 2001 07:21:50 -0000 Received: (qmail 19440 invoked from network); 19 Jun 2001 07:21:36 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 19 Jun 2001 07:21:36 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15CFez-0000DO-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Jun 2001 08:10:49 +0100 Received: from carbon.btinternet.com ([194.73.73.92]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15CFeo-0000DI-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Jun 2001 08:10:39 +0100 Received: from [213.1.137.19] (helo=dave) by carbon.btinternet.com with smtp (Exim 3.22 #9) id 15CFe8-0003PN-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Jun 2001 08:09:56 +0100 Message-ID: <002501c0f88e$eba864e0$138901d5@dave> From: "Dave Sergeant" To: "rsgb_lf_group" References: <001501c0f7f3$8b3083e0$0100a8c0@mshome.net> Subject: LF: Re: Anyone using a magnetic loop for 136 Khz? Date: Tue, 19 Jun 2001 08:09:22 +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: >From Dave G3YMC Paul WA1VLF wrote >I have had a sudden interest in small manetic transmitting loops lately. >Have seen manty designs for 160 meters and above but not too much on LF. >Anyone running one of these at 136Khz? How is the feeding done?\\ Myself and GW4ALG have both successfully used loops on 136 - small in the context of the size of my garden, but much bigger than the normal receive loop. Have a look at my site (address below) and Steve's which is linked from mine. Despite being despised by some, they are an excellent way of getting on the band from impossible QTHs. I do note some qsb on some signals (eg GW4ALG) at times - whether that would be apparant on a Marconi I do not know, when I get my vertical up I may be able to do comparisons. However my 100ft circumference loop is certainly an excellent receive antenna (apart from in its null) regardless of whether there is occasional qsb. 73s Dave G3YMC dsergeant@iee.org dsergeant@connectfree.co.uk http://www.dsergeant.btinternet.co.uk From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27916 invoked from network); 19 Jun 2001 00:43:48 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 19 Jun 2001 00:43:48 -0000 Received: (qmail 16548 invoked from network); 19 Jun 2001 00:43:37 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 19 Jun 2001 00:43:37 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15C9WG-0005Oh-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 19 Jun 2001 01:37:24 +0100 Received: from imo-m04.mx.aol.com ([64.12.136.7]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15C9WF-0005Ob-00 for rsgb_lf_group@blacksheep.org; Tue, 19 Jun 2001 01:37:23 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from MarkusVester@aol.com by imo-m04.mx.aol.com (mail_out_v30.22.) id l.80.bdc4ee9 (18255) for ; Mon, 18 Jun 2001 20:36:18 -0400 (EDT) From: MarkusVester@aol.com Message-ID: <80.bdc4ee9.285ff881@aol.com> Date: Mon, 18 Jun 2001 20:36:17 EDT Subject: LF: Steep skywaves, polarisation, non-reciprocity 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 72 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi John, Alan, Mike, Rik and all, >> I remember hearing slow QSB on the transmissions of G2AJV (when I was in >> GW) and GW4ALG, both at about 300km. They both used loops and I have >> not heard QSB at less than 450km with Marconi antennas. > I can confirm that Roger, G2AJV, had a lot of QSB while othere G's at > about the same distance (but using verticals) had no QSB. One point may be polarisation: While the groundwave must have vertical E-field and transverse H to propagate, a skywave from above can have two independent polarisations of its horizontal magnetic field (and no E-field over conducting ground). We could surely think about re-using bandwidth by polarisation multiplexing ;-) In a coordinate system with z pointing vertical and x towards the receiver, the skywave of a vertical Tx antenna can be received by its Ez and Hy fields. The same would apply for a Tx loop oriented to the maximum (ie loop-plane in x-z) or a horizontal x-dipole. In the minimum orientation (ie in y-z), these would produce only Hx at the receiver and be undetectable by a vertical. And in the in-between case of near-minimum orientation, the skywave would be preferred and fading emphasized. > But there is one thing that I never really understood : > Even if a (transmitting) loop produces a lot of 'steep angle' radiation a > vertical antenna (for receiving) should be rather insensitive for the > incoming 'steep angle' signal. One would expect to notice the QSB only with > both TX and RX side are using loops. > But I could notice the QSB with a vertical as RX antenna. > If the reciprocal principle works then any antenna that can receive 'steep > angle' transmission should also transmit at these angles. > > 73, Rik ON7YD Yes, even though theoretically a path may be non-reciprocal at a given instant due to Faraday rotation in earth's field, on a long-term average the swapping of Rx and Tx antennas should give equal results. For 300km separation, the elevation would be around 35 deg, low enough for a vertical to be effective. How about that possible short-term non-reciprocity: Apparently it is common in moonbounce work, but can it really be observed at LF? As a simple experiment, one could (perhaps automatically) transmit periodic signal reports in a fading situation, and look for discrepancies at the other end. Regards Markus, DF6NM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6180 invoked from network); 18 Jun 2001 22:23:57 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 18 Jun 2001 22:23:57 -0000 Received: (qmail 17582 invoked from network); 18 Jun 2001 22:23:01 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Jun 2001 22:23:01 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15C7JJ-000488-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Jun 2001 23:15:53 +0100 Received: from fep03.swip.net ([130.244.199.131] helo=fep03-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15C7JI-000483-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 23:15:53 +0100 Received: from oemcomputer ([212.151.88.72]) by fep03-svc.swip.net with SMTP id <20010618221616.JYID15867.fep03-svc.swip.net@oemcomputer> for ; Tue, 19 Jun 2001 00:16:16 +0200 Message-ID: <000701c0f83b$c70f4700$485897d4@oemcomputer> From: "Johan Bodin" To: rsgb_lf_group@blacksheep.org Subject: LF: SV: Magnetometer uses Date: Tue, 19 Jun 2001 00:15:18 +0300 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Andy, perhaps someone at http://www.aurorawatch.york.ac.uk/ has the answer. 73 Johan SM6LKM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26672 invoked from network); 18 Jun 2001 20:11:09 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 18 Jun 2001 20:11:09 -0000 Received: (qmail 9722 invoked from network); 18 Jun 2001 20:10:58 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Jun 2001 20:10:58 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15C5HI-0002y4-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Jun 2001 21:05:40 +0100 Received: from carbon.btinternet.com ([194.73.73.92]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15C5HH-0002xz-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 21:05:39 +0100 Received: from [213.122.248.229] (helo=default) by carbon.btinternet.com with smtp (Exim 3.22 #9) id 15C5GZ-0001H0-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 21:04:55 +0100 Message-ID: <003601c0f831$d1dbc1e0$a7e87ad5@default> From: "Alan Melia" To: "LF-Group" Subject: LF: delays Date: Mon, 18 Jun 2001 21:04:00 +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: Hi all, my message did arrive for me to view but took 5 hours and 40 mins so maybe that is the problem that Andy is seeing as well. Cheers de Alan G3NYK From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 265 invoked from network); 18 Jun 2001 20:09:13 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 18 Jun 2001 20:09:13 -0000 Received: (qmail 19226 invoked from network); 18 Jun 2001 20:08:51 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 18 Jun 2001 20:08:52 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15C5EN-0002xr-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Jun 2001 21:02:39 +0100 Received: from protactinium.btinternet.com ([194.73.73.176] helo=protactinium) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15C5EM-0002xm-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 21:02:38 +0100 Received: from [213.122.248.229] (helo=default) by protactinium with smtp (Exim 3.22 #9) id 15C5Dh-0002Ok-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 21:01:58 +0100 Message-ID: <002f01c0f831$681d23c0$a7e87ad5@default> From: "Alan Melia" To: "LF-Group" Subject: LF: return-to-sender .... Date: Mon, 18 Jun 2001 19:10:47 +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 can confirm that I have not had the reply back that I posted via the reflector to Andy's query ablout magnetometers. If this is a operational change for the reflector I fear it could lead to a lot of duplicate postings. 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 9800 invoked from network); 18 Jun 2001 18:00:33 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 18 Jun 2001 18:00:33 -0000 Received: (qmail 12827 invoked from network); 18 Jun 2001 18:00:19 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 18 Jun 2001 18:00:19 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15C3DZ-0001pR-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Jun 2001 18:53:41 +0100 Received: from rhenium.btinternet.com ([194.73.73.93] helo=rhenium) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15C3DY-0001pM-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 18:53:40 +0100 Received: from [213.122.232.167] (helo=default) by rhenium with smtp (Exim 3.22 #9) id 15C3Cm-0002Cy-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 18:52:53 +0100 Message-ID: <000201c0f81f$5dd09800$a7e87ad5@default> From: "Alan Melia" To: "LF-Group" Subject: LF: re Magnetometers Date: Mon, 18 Jun 2001 13:16:16 +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, I am afraid I have no real knowledge of Magetometers, other than contact for help for people who have wanted to build them. I believe that the Ap and Kp indexes (indicies ??) are a measure of the changes of the earth field due to interaction with solar disturbances. I am not sure whether the field is measured at ground level or not. The other complication is that the major changes do no correlate directly with propagation conditions but I do believe that it may be possible to get up to 24 hours notice of a possible collapse in good conditions........a sort of negative forecast. I'm still working on that one. I will now go and read the gen on the sites quoted by Dick and see if I can learn something too. 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 27021 invoked from network); 18 Jun 2001 17:08:15 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 18 Jun 2001 17:08:15 -0000 Received: (qmail 1614 invoked from network); 18 Jun 2001 17:07:54 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 18 Jun 2001 17:07:54 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15C2KT-0001Pr-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Jun 2001 17:56:45 +0100 Received: from mail6.svr.pol.co.uk ([195.92.193.212]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15C2KS-0001Pk-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 17:56:44 +0100 Received: from modem-177.phosphorus.dialup.pol.co.uk ([62.136.14.177] helo=robing) by mail6.svr.pol.co.uk with smtp (Exim 3.13 #0) id 15C2Jm-00079U-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 17:56:02 +0100 Message-ID: <001801c0f80f$668d2d60$b10e883e@robing> From: "Robin T. Greenwood" To: rsgb_lf_group@blacksheep.org References: <7D653C9C42F5D411A27C00508BF8803D55C4F1@pdw-mail-r1.dstl.gov.uk> Subject: LF: Re: RE: Anyone using a magnetic loop for 13 6 Khz? Date: Mon, 18 Jun 2001 16:57:31 +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 5.50.4133.2400 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: There was a nice design recently (2yrs?) in RadCom. Robin G3LBA ----- Original Message ----- From: "Talbot Andrew" To: Sent: Monday, June 18, 2001 4:19 PM Subject: LF: RE: Anyone using a magnetic loop for 13 6 Khz? > Another example of a reply without the original posting being returned, what > is going on ? > Anyway ... > > I'll send the spreadsheet direct. > > Turns were spaced about 50mm apart - defined by the standard pipe clips for > this tubing. > The effect of N turns over a single turn loop is to : > Increase the Radiation resistance by N^2 > Increase the loss resistance by N > Increase the inductance by very nearly N^2 > Increase the copper in the air by N > > Hence efficiency goes up roughly proportional to N. Efficiency is also > proportional to amount of copper in the air - which seemed to be a > reasonably acucrate rule of thumb true whatever combination of turns, wire > thickness, wire type I tried to use in the calculations. > > The loop was series resonated with around 110nF (for 73kHz) of high voltage > polystyrene caps and passed as one turn through an ETD44 ferrite core. This > winding was made from the braid from UR67 coax, but its length was short so > didn't add much extra loss. The feed was into the multiturn primary of this > transformer. In those days I was using an audio amplifier, feeding the > primary direct from its 8 ohm output via home made Litz wire. Calculated > loss resistance of this loop was around 0.06 ohms, based on skin depth > calculations. The actual loss resistance figure measured as less than 0.1 > ohms so I was confident in the calculations - the extra was due to series R > in the caps and proximity effects to ground. Measuring parameters on a > loop antenna are very straightforward - simple application of equations for > Q / Bandwidth can soon show how close theory is to practice, and I always > found good correlation between the two. > > When the loop becomes very big there comes a point where its efficiency > begins to rival or even exceed that of wire antennas. Only one or two > operators have ever got that far on LF - G2AJV was one of them with a huge > loop over several hundred m long, seem to recall, by several metres high. > > But as stated in the last EMail - small loops have nothing to offer against > wire antennas where space is limited. > > Andy G4JNT > > > > -----Original Message----- > > From: Paul A. Cianciolo [mailto:paulc@snet.net] > > Sent: 2001-06-18 14:56 > > To: rsgb_lf_group@blacksheep.org > > Subject: LF: Re: RE: Anyone using a magnetic loop for 136 Khz? > > > > > > Andy, > > Thanks for the response!!!!! > > WOW ! Do you still have a copy of the spreadsheet? > > I would love to see a copy. > > > > It seems like 10 Db down was not so bad considering how small > > the loop was. > > I have the means to support a loop with the apex at over 100 feet. > > > > I have not seen any info on multiturn magloops. Please help I am very > > interested. > > > > > > > > > > > > -----Original Message----- > > > > From: Paul A. Cianciolo [mailto:paulc@snet.net] > > > > Sent: 2001-06-18 13:38 > > > > To: rsgb_lf_group@blacksheep.org > > > > Subject: LF: Anyone using a magnetic loop for 136 Khz? > > > > > > > > > > > > Hello Folk. > > > > > > > > I have had a sudden interest in small manetic transmitting > > > > loops lately. > > > > Have seen manty designs for 160 meters and above but not too > > > > much on LF. > > > > > > > > Anyone running one of these at 136Khz? How is the > > feeding done?\\ > > > > > > > > Most designs that I have seen use tubing to reduce the I*R > > > > losses. Do to > > > > skin effect I realize that current flows only on the > > > > surface of the conductor. This maseem like a very basic > > > > question but do > > > > current flow on the inside of the tubing? > > > > And if it does of what use is it? Seems to me like it would > > > > not be useful > > > > for radiating purposes since it is inside of a shielded pipe. > > > > > > > > Would not a flat strap cable be better? > > > > > > > > Thank you > > > > > > > > Looking toward 136 Khz!!!!!!! > > > > > > > > > > > > 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 > > > > Air Rifle Target Shooting Enthusiast > > > > > > > > > > > > > > > > > > > > > -- > > > 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. > > > > > > > > > > -- > 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 26507 invoked from network); 18 Jun 2001 15:55:57 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 18 Jun 2001 15:55:57 -0000 Received: (qmail 29619 invoked from network); 18 Jun 2001 15:55:42 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 18 Jun 2001 15:55:42 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15C1In-0000mq-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Jun 2001 16:50:57 +0100 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15C1Ij-0000ml-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 16:50:53 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id QAA09535; Mon, 18 Jun 2001 16:55:04 +0100 (BST) Received: (qmail 21931 invoked from network); 18 Jun 2001 16:43:18 -0000 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 18 Jun 2001 16:43:17 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: by gauntlet.mail.dera.gov.uk; id QAA26936; Mon, 18 Jun 2001 16:34:29 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma026844; Mon, 18 Jun 01 16:33:54 GMT Received: from mailex.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with SMTP id for ; Mon, 18 Jun 2001 16:29:07 +0100 Received: (qmail 3867 invoked from network); 18 Jun 2001 15:10:15 +0100 Received: from softdnserror (HELO cchecker.dstl.gov.uk) (192.168.248.52) by mailex.dstl.gov.uk with SMTP; 18 Jun 2001 14:10:15 -0000 Received: from FRN-MAIL-R1.dstl.gov.uk (unverified) by cchecker.dstl.gov.uk (Content Technologies SMTPRS 4.1.2) with ESMTP id for ; Mon, 18 Jun 2001 15:10:37 +0100 Received: by frn-mail-r1.dstl.gov.uk with Internet Mail Service (5.5.2650.21) id ; Mon, 18 Jun 2001 16:19:17 +0100 Message-ID: <7D653C9C42F5D411A27C00508BF8803D55C4F1@pdw-mail-r1.dstl.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: Anyone using a magnetic loop for 13 6 Khz? Date: Mon, 18 Jun 2001 16:19:16 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) 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: Another example of a reply without the original posting being returned, what is going on ? Anyway ... I'll send the spreadsheet direct. Turns were spaced about 50mm apart - defined by the standard pipe clips for this tubing. The effect of N turns over a single turn loop is to : Increase the Radiation resistance by N^2 Increase the loss resistance by N Increase the inductance by very nearly N^2 Increase the copper in the air by N Hence efficiency goes up roughly proportional to N. Efficiency is also proportional to amount of copper in the air - which seemed to be a reasonably acucrate rule of thumb true whatever combination of turns, wire thickness, wire type I tried to use in the calculations. The loop was series resonated with around 110nF (for 73kHz) of high voltage polystyrene caps and passed as one turn through an ETD44 ferrite core. This winding was made from the braid from UR67 coax, but its length was short so didn't add much extra loss. The feed was into the multiturn primary of this transformer. In those days I was using an audio amplifier, feeding the primary direct from its 8 ohm output via home made Litz wire. Calculated loss resistance of this loop was around 0.06 ohms, based on skin depth calculations. The actual loss resistance figure measured as less than 0.1 ohms so I was confident in the calculations - the extra was due to series R in the caps and proximity effects to ground. Measuring parameters on a loop antenna are very straightforward - simple application of equations for Q / Bandwidth can soon show how close theory is to practice, and I always found good correlation between the two. When the loop becomes very big there comes a point where its efficiency begins to rival or even exceed that of wire antennas. Only one or two operators have ever got that far on LF - G2AJV was one of them with a huge loop over several hundred m long, seem to recall, by several metres high. But as stated in the last EMail - small loops have nothing to offer against wire antennas where space is limited. Andy G4JNT > -----Original Message----- > From: Paul A. Cianciolo [mailto:paulc@snet.net] > Sent: 2001-06-18 14:56 > To: rsgb_lf_group@blacksheep.org > Subject: LF: Re: RE: Anyone using a magnetic loop for 136 Khz? > > > Andy, > Thanks for the response!!!!! > WOW ! Do you still have a copy of the spreadsheet? > I would love to see a copy. > > It seems like 10 Db down was not so bad considering how small > the loop was. > I have the means to support a loop with the apex at over 100 feet. > > I have not seen any info on multiturn magloops. Please help I am very > interested. > > > > > > > > -----Original Message----- > > > From: Paul A. Cianciolo [mailto:paulc@snet.net] > > > Sent: 2001-06-18 13:38 > > > To: rsgb_lf_group@blacksheep.org > > > Subject: LF: Anyone using a magnetic loop for 136 Khz? > > > > > > > > > Hello Folk. > > > > > > I have had a sudden interest in small manetic transmitting > > > loops lately. > > > Have seen manty designs for 160 meters and above but not too > > > much on LF. > > > > > > Anyone running one of these at 136Khz? How is the > feeding done?\\ > > > > > > Most designs that I have seen use tubing to reduce the I*R > > > losses. Do to > > > skin effect I realize that current flows only on the > > > surface of the conductor. This maseem like a very basic > > > question but do > > > current flow on the inside of the tubing? > > > And if it does of what use is it? Seems to me like it would > > > not be useful > > > for radiating purposes since it is inside of a shielded pipe. > > > > > > Would not a flat strap cable be better? > > > > > > Thank you > > > > > > Looking toward 136 Khz!!!!!!! > > > > > > > > > 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 > > > Air Rifle Target Shooting Enthusiast > > > > > > > > > > > > > > > -- > > 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. > > > > -- 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 15646 invoked from network); 18 Jun 2001 15:03:02 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 18 Jun 2001 15:03:02 -0000 Received: (qmail 6091 invoked from network); 18 Jun 2001 15:02:44 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Jun 2001 15:02:44 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15C0T8-0000Mk-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Jun 2001 15:57:34 +0100 X-MSMail-Priority: Normal Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15C0T4-0000Mf-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 15:57:31 +0100 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 QAA1269152 for ; Mon, 18 Jun 2001 16:56:49 +0200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3.0.1.16.20010618155713.0fa756cc@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 Jun 2001 15:57:13 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: Re: RE: Anyone using a magnetic loop for 136 Khz? In-reply-to: <001d01c0f7fe$78b29fe0$57ddfc40@mshome.net> References: <7D653C9C42F5D411A27C00508BF8803D55C4ED@pdw-mail-r1.dstl.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: >I have not seen any info on multiturn magloops. Please help I am very >interested. Hello Paul, I remember a discussion on this reflector about multiturn loops. When I rember well the conclusion was that there was no difference between a 10 turn loop or a single turn loop with 10 wires in parallel, it just seemed a matter of getting a certain 'weight' of copper up in the air. But there seemed to be an advantage to have 2 turn loop that was symmetrical loaded, I don't remind details but it had something to do with induced current in the ground. Maybe the above rings a bell to some reader with a better memory (or better knowledge of loop antennas) who can tell a bit more about this. 73, Rik ON7YD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25162 invoked from network); 18 Jun 2001 14:56:08 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 18 Jun 2001 14:56:08 -0000 Received: (qmail 29005 invoked from network); 18 Jun 2001 14:55:12 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Jun 2001 14:55:12 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15C0MN-0000FX-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Jun 2001 15:50:35 +0100 X-MSMail-Priority: Normal Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15C0MI-0000FN-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 15:50:31 +0100 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 QAA1075290 for ; Mon, 18 Jun 2001 16:49:50 +0200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3.0.1.16.20010618155014.0bbf9ea2@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 Jun 2001 15:50:14 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: Loops and steep skywaves In-reply-to: <3B2E0A3B.4081.1092E2B@localhost> References: <118.698000.285d4165@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 14:03 18/06/01 +0100, G3XDV wrote: >I remember hearing slow QSB on the transmissions of G2AJV (when I was in >GW) and GW4ALG, both at about 300km. They both used loops and I have >not heard QSB at less than 450km with Marconi antennas. I can confirm that Roger, G2AJV, had a lot of QSB while othere G's at about the same distance (but using verticals) had no QSB. But there is one thing that I never really understood : Even if a (transmitting) loop produces a lot of 'steep angle' radiation a vertical antenna (for receiving) should be rather insensitive for the incoming 'steep angle' signal. One would expect to notice the QSB only with both TX and RX side are using loops. But I could notice the QSB with a vertical as RX antenna. If the reciprocal principle works then any antenna that can receive 'steep angle' transmission should also transmit at these angles. 73, Rik ON7YD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5630 invoked from network); 18 Jun 2001 14:02:43 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 18 Jun 2001 14:02:43 -0000 Received: (qmail 14031 invoked from network); 18 Jun 2001 14:02:25 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Jun 2001 14:02:25 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15BzWO-0008I4-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Jun 2001 14:56:52 +0100 Received: from smtp.snet.net ([204.60.6.55]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15BzW7-0008Fn-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 14:56:35 +0100 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 f5IDtgC08092 for ; Mon, 18 Jun 2001 09:55:42 -0400 (EDT) Received: from rescueelect (87.221.252.64.snet.net [64.252.221.87]) by pop.snet.net (8.11.1/8.11.1/SNET-pop-1.5/D-1.8/O-1.6) with SMTP id f5IDtej14391 for ; Mon, 18 Jun 2001 09:55:40 -0400 (EDT) Message-ID: <001d01c0f7fe$78b29fe0$57ddfc40@mshome.net> From: "Paul A. Cianciolo" To: rsgb_lf_group@blacksheep.org References: <7D653C9C42F5D411A27C00508BF8803D55C4ED@pdw-mail-r1.dstl.gov.uk> Subject: LF: Re: RE: Anyone using a magnetic loop for 136 Khz? Date: Mon, 18 Jun 2001 09:56:26 -0400 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: Andy, Thanks for the response!!!!! WOW ! Do you still have a copy of the spreadsheet? I would love to see a copy. It seems like 10 Db down was not so bad considering how small the loop was. I have the means to support a loop with the apex at over 100 feet. I have not seen any info on multiturn magloops. Please help I am very interested. How far were your turns spaced? Also how didyou feed it? So many questions... Sorry Andy Thank you again Pauil A. Cianciolo 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 Air Rifle Target Shooting Enthusiast ----- Original Message ----- From: "Talbot Andrew" To: Sent: Monday, June 18, 2001 9:11 AM Subject: LF: RE: Anyone using a magnetic loop for 136 Khz? > I initially used one on 73kHz. Two turns of 10mm diameter water pipe, > overall loop dia 3m. Efficiency was about -50dB compared with -40dB for a > modest 7m high T antenna so the loop went in the bin. However, did manage > to communicate on 73kHz over a 20km path to a portable Rx, which was a > record distance then - using wideband CW ! > > I produced a spreadsheet to calculate loop parameters; at these frequencies > small loops were very difficult to get down to reasonable losses - there was > certainly no comparison with the same amount of copper when used as a wire > antenna. > > A pity I threw out the 3m dia loop, it would probably have done quite a good > job on Topband. > =============== > On another matter - does this reflector now not reflect messages to the > originator ? This morning I posted the earlier note about magnetometers, > but it never came back to me, but replies did so it obviously got out. > Noticed this at other times too. Other messages seem to be coming in OK. > Lets see if this one comes back.......... > > Andy G4JNT > > > > -----Original Message----- > > From: Paul A. Cianciolo [mailto:paulc@snet.net] > > Sent: 2001-06-18 13:38 > > To: rsgb_lf_group@blacksheep.org > > Subject: LF: Anyone using a magnetic loop for 136 Khz? > > > > > > Hello Folk. > > > > I have had a sudden interest in small manetic transmitting > > loops lately. > > Have seen manty designs for 160 meters and above but not too > > much on LF. > > > > Anyone running one of these at 136Khz? How is the feeding done?\\ > > > > Most designs that I have seen use tubing to reduce the I*R > > losses. Do to > > skin effect I realize that current flows only on the > > surface of the conductor. This maseem like a very basic > > question but do > > current flow on the inside of the tubing? > > And if it does of what use is it? Seems to me like it would > > not be useful > > for radiating purposes since it is inside of a shielded pipe. > > > > Would not a flat strap cable be better? > > > > Thank you > > > > Looking toward 136 Khz!!!!!!! > > > > > > 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 > > Air Rifle Target Shooting Enthusiast > > > > > > > > > -- > 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 15865 invoked from network); 18 Jun 2001 13:22:36 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 18 Jun 2001 13:22:36 -0000 Received: (qmail 19609 invoked from network); 18 Jun 2001 13:22:22 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 18 Jun 2001 13:22:22 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15ByuW-0007yT-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Jun 2001 14:17:44 +0100 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15ByuV-0007yO-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 14:17:43 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id OAA01089; Mon, 18 Jun 2001 14:21:58 +0100 (BST) Received: (qmail 29835 invoked from network); 18 Jun 2001 14:10:11 -0000 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 18 Jun 2001 14:10:11 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: by gauntlet.mail.dera.gov.uk; id OAA26766; Mon, 18 Jun 2001 14:01:21 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma026548; Mon, 18 Jun 01 14:00:26 GMT Received: from mailex.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with SMTP id for ; Mon, 18 Jun 2001 14:21:28 +0100 Received: (qmail 14897 invoked from network); 18 Jun 2001 13:02:38 +0100 Received: from softdnserror (HELO cchecker.dstl.gov.uk) (192.168.248.52) by mailex.dstl.gov.uk with SMTP; 18 Jun 2001 12:02:38 -0000 Received: from FRN-MAIL-R1.dstl.gov.uk (unverified) by cchecker.dstl.gov.uk (Content Technologies SMTPRS 4.1.2) with ESMTP id for ; Mon, 18 Jun 2001 13:03:00 +0100 Received: by frn-mail-r1.dstl.gov.uk with Internet Mail Service (5.5.2650.21) id ; Mon, 18 Jun 2001 14:11:40 +0100 Message-ID: <7D653C9C42F5D411A27C00508BF8803D55C4ED@pdw-mail-r1.dstl.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: Anyone using a magnetic loop for 136 Khz? Date: Mon, 18 Jun 2001 14:11:41 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) 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 initially used one on 73kHz. Two turns of 10mm diameter water pipe, overall loop dia 3m. Efficiency was about -50dB compared with -40dB for a modest 7m high T antenna so the loop went in the bin. However, did manage to communicate on 73kHz over a 20km path to a portable Rx, which was a record distance then - using wideband CW ! I produced a spreadsheet to calculate loop parameters; at these frequencies small loops were very difficult to get down to reasonable losses - there was certainly no comparison with the same amount of copper when used as a wire antenna. A pity I threw out the 3m dia loop, it would probably have done quite a good job on Topband. =============== On another matter - does this reflector now not reflect messages to the originator ? This morning I posted the earlier note about magnetometers, but it never came back to me, but replies did so it obviously got out. Noticed this at other times too. Other messages seem to be coming in OK. Lets see if this one comes back.......... Andy G4JNT > -----Original Message----- > From: Paul A. Cianciolo [mailto:paulc@snet.net] > Sent: 2001-06-18 13:38 > To: rsgb_lf_group@blacksheep.org > Subject: LF: Anyone using a magnetic loop for 136 Khz? > > > Hello Folk. > > I have had a sudden interest in small manetic transmitting > loops lately. > Have seen manty designs for 160 meters and above but not too > much on LF. > > Anyone running one of these at 136Khz? How is the feeding done?\\ > > Most designs that I have seen use tubing to reduce the I*R > losses. Do to > skin effect I realize that current flows only on the > surface of the conductor. This maseem like a very basic > question but do > current flow on the inside of the tubing? > And if it does of what use is it? Seems to me like it would > not be useful > for radiating purposes since it is inside of a shielded pipe. > > Would not a flat strap cable be better? > > Thank you > > Looking toward 136 Khz!!!!!!! > > > 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 > Air Rifle Target Shooting Enthusiast > > > -- 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 10686 invoked from network); 18 Jun 2001 13:21:01 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 18 Jun 2001 13:21:01 -0000 Received: (qmail 18219 invoked from network); 18 Jun 2001 13:20:40 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 18 Jun 2001 13:20:40 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15BytL-0007yM-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Jun 2001 14:16:31 +0100 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 #2) id 15BytJ-0007yH-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 14:16:30 +0100 Received: from miked by rsgb.org.uk with SMTP (MDaemon.PRO.v4.0.0.R) for ; Mon, 18 Jun 2001 14:03:41 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Mon, 18 Jun 2001 14:03:39 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: Loops and steep skywaves Message-ID: <3B2E0A3B.4081.1092E2B@localhost> In-reply-to: <118.698000.285d4165@aol.com> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-Return-Path: miked@mail X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: DF6NM wrote: > However, transmitting with a magnetic loop over ground will produce vertical > skywave and groundwave radiation with equal efficiency. I remember hearing slow QSB on the transmissions of G2AJV (when I was in GW) and GW4ALG, both at about 300km. They both used loops and I have not heard QSB at less than 450km with Marconi antennas. 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 19268 invoked from network); 18 Jun 2001 12:53:37 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 18 Jun 2001 12:53:37 -0000 Received: (qmail 26814 invoked from network); 18 Jun 2001 12:53:22 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 18 Jun 2001 12:53:22 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15BySo-0007hS-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Jun 2001 13:49:06 +0100 X-MSMail-Priority: Normal Received: from asterix.tee.gr ([212.70.193.140]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15BySk-0007hN-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 13:49:02 +0100 Received: from teeserver.tee.gr (teeserver.tee.gr [212.70.193.130]) by asterix.tee.gr (8.11.4/8.11.4) with ESMTP id f5ICmba07570 for ; Mon, 18 Jun 2001 15:48:38 +0300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from odin ([212.70.201.216]) by teeserver.tee.gr (Netscape Messaging Server 4.1) with SMTP id GF4MA100.GS7; Mon, 18 Jun 2001 15:49:13 +0300 Message-ID: <3.0.2.32.20010618154745.00711288@aurora.eexi.gr> X-Sender: sv1xv@aurora.eexi.gr (Unverified) X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.2 (32) Date: Mon, 18 Jun 2001 15:47:45 +0300 To: rsgb_lf_group@blacksheep.org, lowfer@qth.net From: "Costas Krallis" Subject: LF: QSL for GBR CW tranmission In-reply-to: <5.0.2.1.2.20010527233337.00a02b10@mail.pncl.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: Today I received my QSL card from BT Rugby Radio Station for my reception report for the Special Transmission of 29 May on 16 kHz. It is signed by M J Hancock and the address on the card is: BT Rugby Radio Station Hilmorton RUGBY Warwickshire CV23 0AS which means that the station is opearated by Brish Telecom on behalff of the Royal Navy. Costas +------------------------------------------------------------+ | Costas Krallis SV1XV * LOC KM18UA | | P.O.Box 3066 * E-Mail: sv1xv@eexi.gr | | GR-10210 Athens * PGP key: 0x3BDBBC34 | | GREECE * http://www.qsl.net/sv1xv/ | | * http://w4u.eexi.gr/~sv1xv/ | +------------------------------------------------------------+ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17158 invoked from network); 18 Jun 2001 12:44:46 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 18 Jun 2001 12:44:46 -0000 Received: (qmail 7585 invoked from network); 18 Jun 2001 12:43:50 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Jun 2001 12:43:50 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15ByII-0007a9-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Jun 2001 13:38:14 +0100 Received: from smtp.snet.net ([204.60.6.55]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15ByIE-0007a4-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 13:38:10 +0100 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 f5ICbRC25046 for ; Mon, 18 Jun 2001 08:37:28 -0400 (EDT) Received: from rescueelect (nwhn-sh22-port77.snet.net [204.60.247.77]) by pop.snet.net (8.11.1/8.11.1/SNET-pop-1.5/D-1.8/O-1.6) with SMTP id f5ICbRj10265 for ; Mon, 18 Jun 2001 08:37:27 -0400 (EDT) Message-ID: <001501c0f7f3$8b3083e0$0100a8c0@mshome.net> From: "Paul A. Cianciolo" To: rsgb_lf_group@blacksheep.org Subject: LF: Anyone using a magnetic loop for 136 Khz? Date: Mon, 18 Jun 2001 08:38:14 -0400 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 Folk. I have had a sudden interest in small manetic transmitting loops lately. Have seen manty designs for 160 meters and above but not too much on LF. Anyone running one of these at 136Khz? How is the feeding done?\\ Most designs that I have seen use tubing to reduce the I*R losses. Do to skin effect I realize that current flows only on the surface of the conductor. This maseem like a very basic question but do current flow on the inside of the tubing? And if it does of what use is it? Seems to me like it would not be useful for radiating purposes since it is inside of a shielded pipe. Would not a flat strap cable be better? Thank you Looking toward 136 Khz!!!!!!! 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 Air Rifle Target Shooting Enthusiast From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21163 invoked from network); 18 Jun 2001 11:38:12 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 18 Jun 2001 11:38:12 -0000 Received: (qmail 2153 invoked from network); 18 Jun 2001 11:37:54 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 18 Jun 2001 11:37:54 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15BxFl-00074e-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Jun 2001 12:31:33 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from mserv1d.vianw.co.uk ([195.102.240.96]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15BxFh-00074Z-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 12:31:29 +0100 Received: from [213.2.16.106] (helo=rsgb.org.uk) by mserv1d.vianw.co.uk with esmtp (Exim 3.22 #5) id 15BxEz-0006iC-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 12:30:45 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from miked by rsgb.org.uk with SMTP (MDaemon.PRO.v4.0.0.R) for ; Mon, 18 Jun 2001 12:29:58 +0100 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Mon, 18 Jun 2001 12:29:56 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: Antenna losses Message-ID: <3B2DF444.31687.B360FD@localhost> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-Return-Path: miked@mail X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: My inverted-L has been faulty for several weeks now. It started with one of the top wires coming away from its perspex insulator. Because of the way the three wires are connected, this was not a disaster, but the spacing of the three top wires was reduced, and hence the capacitance was reduced. I compensated for this by removing a series capacitor I have at the feedpoint. The current dropped from 2.2A before the failure to 2A. Over the next few weeks, the leaves grew on the trees under the far end of the antenna, and this lowered the resonant frequency so I had to add the series capacitor again. By this time the current had dropped to 1.8A. This weekend I lowered the mast and checked why the original failure had occurred. I had a cable tie connecting a loop of antenna wire and the insulator. This had become brittle and showed signs of heating. I concluded that this was due to corona. I now have a short loop of wire instead of the cable tie. On raising the repaired antenna, I found it resonated at 134kHz, and because most of the inductance is at the top of the mast I could not bring it up in frequency! This was a direct result of the leaves as the antenna was resonant inband throughout the winter. Next I dropped the mast at the far end and removed 1m of wire from each of the top wires - actually I inserted an insulator 1m from the ends. This small change raised the resonant frequency to 139kHz, so I had to add a small inductor at the feedpoint to bring it onto the band. I assume this was not only because the antenna was shorter, but that its capacitance to the tree tops was much less. This was confirmed by the current going up to 2.2A, the same as when the trees were bare. Three lessons here: 1) Don't put so much inductance at the top of the mast that you run out of flexibility. 2) Never use cable ties at high voltage points - even corona destroys them. 3) Leaves are bad news. Even 1m increase in separation reduces the losses. Now to get back on 73kHz. 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 28103 invoked from network); 18 Jun 2001 10:46:05 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 18 Jun 2001 10:46:05 -0000 Received: (qmail 19678 invoked from network); 18 Jun 2001 10:45:09 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Jun 2001 10:45:09 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15BwQb-0006Zw-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Jun 2001 11:38:41 +0100 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15BwQW-0006Zq-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 11:38:36 +0100 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 MAA203752 for ; Mon, 18 Jun 2001 12:37:55 +0200 Message-ID: <3.0.1.16.20010618113819.1b7f36c6@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 Jun 2001 11:38:19 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: Magnetometer uses In-reply-to: <7D653C9C42F5D411A27C00508BF8803D55C4E9@pdw-mail-r1.dstl.go v.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: Andy, have a look at these sides for some homebuilt magnetometers : http://www.regulusastro.com/regulus/papers/magnetometer/index.html http://image.gsfc.nasa.gov/poetry/workbook/page9.html http://www.portup.com/~dfount/proton.htm http://www.astro.uni-bonn.de/~kbagschi/magnet-e.html maybe there is something usefull for you. 73, Rik ON7YD At 09:54 18/06/01 +0100, you wrote: >I have been given a small compass module that, apart from magnetic heading, >gives a serial digital high resolution output of X and Y components of the >Earths magnetic field. Added a simple PIC + S/W to give the outputs in text >formatted RS232 for connection to a PC. Whilst idly thinking of something >to do with this (apart from a remote compass on my antenna) I wondered >about a 2 axis magnetometer monitoring for solar storms etc. > >Does anyone on this reflector (Alan ?) know what sort of magnetic field >changes are a precursor to magnetic storms, and what sort of sampling >interval it is worth averaging over to automatically alert on these. I >could easily log X / Y data to disc at a regular interval, write an alerting >function etc etc. if there is any worthwhile research advantage in doing >so. Otherwise the module will be relegated to being used on 10GHz portable >operations, for aiming my dish remotely. > >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. > >Attachment Converted: "C:\EUDORA\ATTACH\LFMagnet.htm" > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15369 invoked from network); 18 Jun 2001 09:42:55 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 18 Jun 2001 09:42:55 -0000 Received: (qmail 8908 invoked from network); 18 Jun 2001 09:42:37 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Jun 2001 09:42:37 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15BvMK-00064E-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Jun 2001 10:30:12 +0100 Received: from kuku-rwcmta.excite.com ([198.3.99.63] helo=kuku.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15BvMG-00063m-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 10:30:08 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from zero.excite.com ([199.172.152.241]) by kuku.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20010618092855.FWKS14474.kuku.excite.com@zero.excite.com> for ; Mon, 18 Jun 2001 02:28:55 -0700 Message-ID: <23490152.992856535967.JavaMail.imail@zero.excite.com> Date: Mon, 18 Jun 2001 02:28:25 -0700 (PDT) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Weekend 16/17.6.2001 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 Rich, If you publish a schedule especially for QRSS (with params) with times and exact frequencies for next weekend, I will certainly listen and who knows we might even make a QSO. 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 14785 invoked from network); 18 Jun 2001 09:01:35 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 18 Jun 2001 09:01:35 -0000 Received: (qmail 9204 invoked from network); 18 Jun 2001 09:00:35 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 18 Jun 2001 09:00:35 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15BupF-0005gs-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Jun 2001 09:56:01 +0100 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15BupD-0005gn-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 09:56:00 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id KAA16414; Mon, 18 Jun 2001 10:00:13 +0100 (BST) Received: (qmail 22947 invoked from network); 18 Jun 2001 09:48:27 -0000 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 18 Jun 2001 09:48:27 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: by gauntlet.mail.dera.gov.uk; id JAA09633; Mon, 18 Jun 2001 09:39:41 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma009568; Mon, 18 Jun 01 09:39:14 GMT Received: from mailex.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with SMTP id for ; Mon, 18 Jun 2001 10:04:02 +0100 Received: (qmail 13962 invoked from network); 18 Jun 2001 08:45:08 +0100 Received: from softdnserror (HELO cchecker.dstl.gov.uk) (192.168.248.52) by mailex.dstl.gov.uk with SMTP; 18 Jun 2001 07:45:08 -0000 Received: from FRN-MAIL-R1.dstl.gov.uk (unverified) by cchecker.dstl.gov.uk (Content Technologies SMTPRS 4.1.2) with ESMTP id for ; Mon, 18 Jun 2001 08:45:30 +0100 Received: by frn-mail-r1.dstl.gov.uk with Internet Mail Service (5.5.2650.21) id ; Mon, 18 Jun 2001 09:54:09 +0100 Message-ID: <7D653C9C42F5D411A27C00508BF8803D55C4E9@pdw-mail-r1.dstl.gov.uk> From: "Talbot Andrew" To: "LF Group \(E-mail\)" Subject: LF: Magnetometer uses Date: Mon, 18 Jun 2001 09:54:15 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) 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
I have been given a small compass module that, apart from magnetic heading, gives a serial digital high resolution output of X and Y components of the Earths magnetic field.  Added a simple PIC + S/W to give the outputs in text formatted RS232 for connection to a PC.  Whilst idly thinking of something to do with this (apart from a remote compass on my antenna)  I wondered about a 2 axis magnetometer monitoring for solar storms etc.
 
Does anyone on this reflector (Alan ?) know what sort of magnetic field changes are a precursor to magnetic storms, and what sort of sampling interval it is worth averaging over to automatically alert on these.  I could easily log X / Y data to disc at a regular interval, write an alerting function etc etc.  if there is any worthwhile research advantage in doing so.   Otherwise the module will be relegated to being used on 10GHz portable operations, for aiming my dish remotely.
 
Andy  G4JNT
 
 


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 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5799 invoked from network); 18 Jun 2001 08:22:04 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 18 Jun 2001 08:22:04 -0000 Received: (qmail 14174 invoked from network); 18 Jun 2001 08:21:43 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 18 Jun 2001 08:21:43 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15BuCs-0005QJ-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Jun 2001 09:16:22 +0100 Received: from ns3.swh.sk ([192.108.125.37]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15BuCn-0005QD-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Jun 2001 09:16:18 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from hermes.swh.sk (hermes [192.108.125.60]) by ns3.swh.sk (8.11.0/8.11.0) with ESMTP id f5I8MFS14160 for ; Mon, 18 Jun 2001 10:22:16 +0200 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 KAA17929 for ; Mon, 18 Jun 2001 10:15:33 +0200 (MET DST) Received: by btss.swh.sk with Internet Mail Service (5.5.2653.19) id ; Mon, 18 Jun 2001 10:15:30 +0200 Message-ID: <29BDD4F529FCD311B631009027357C4E02258772@btss103a.swh.sk> From: "Gasparik Richard" To: "Rsgb_Lf_Group \(E-mail\)" Subject: LF: Weekend 16/17.6.2001 Date: Mon, 18 Jun 2001 10:15:26 +0200 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) 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 was QRV on 136kHz last weekend. I CQ-ing all the time on CW and QRSS (trying 3s and 10s dots too) and looking for any other stations, but nothing. I worked only HA6PC and received SWL reports from DL6SN. QRN level was very high. Just testing my new 300 W transmitter. Maybe next weekend will be better. 73 de Rich OM2TW From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10239 invoked from network); 17 Jun 2001 19:34:22 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 17 Jun 2001 19:34:22 -0000 Received: (qmail 4582 invoked from network); 17 Jun 2001 19:34:04 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 17 Jun 2001 19:34:04 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15BiDc-0007RW-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 17 Jun 2001 20:28:20 +0100 X-MSMail-Priority: Normal Received: from jubilee.ns.sympatico.ca ([142.177.1.6] helo=mail-ns00s0.ns.sympatico.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15BiDa-0007RR-00 for rsgb_lf_group@blacksheep.org; Sun, 17 Jun 2001 20:28:19 +0100 Received: from ns.sympatico.ca ([142.177.83.6]) by mail-ns00s0.ns.sympatico.ca (Post.Office MTA v3.5.3 release 223 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Sun, 17 Jun 2001 16:26:48 -0300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B2D3DD4.D3E62691@ns.sympatico.ca> Date: Sun, 17 Jun 2001 19:31:32 -0400 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: Loops and steep skywaves References: <118.698000.285d4165@aol.com> 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: Hi Markus, As I have stated before I believe Loran could be used to obtain much skywave information. I have personally done many observations of Loran signals with ranges of 300 to5000 nautical mile. . Unfortunately most of my notes have been lost. I do , however , remember that at 300 nm range the night time skywave delay is about 600 microseconds. The delay of the first hop skywave is near 30 microseconds in the daytime and 60 microseconds at night. this is at a latitude of 40 to 50 degrees north and at a range of 800 nautical miles. At higher latitudes where the reflecting layer may be lower the minimum daytime delay may be 25 microseconds or less. The 25 microsecond # also can be observed when the ionosphere is disturbed. The above data were obtained when the groundwave was propagating over salt water. When propagating over ground of extremely low ground wave conductivity, the grounwave can be both extremely attenuated and delayed. Oslo Norway could be a very good place to observe loran skywaves, because the Ejde groundwave is severely attenuated and the skywaves are more easily seen . Observing loran -C ground and skywaves are also interesting to observe during a solar eclipse. The methode I used for observing ground and skywaves was as follows : 1 You need to phase lock to the incoming signals. 2 The front end filtering is important. We used the same ant coupler I'm using now with a 5 pole elliptical filter ( low Pass) cutting off at 150 kHz. The input is untuned. It has high impedance, very low (5 pico Farad) capacitance to ground at the input 3 The receiver must have a wide bandwidth prior to sampling. We had 23 kHz This can result in heavey interference problems. The Decca Master and red stations were always a problem. So notch filtors were used to help. 4 In most Loran receivers there is a trigger which comes out just before each of the 8 pulses is received. This can be used to trigger the scope and with the scope set for 50 or 100 microseconds/cm The received pulse train can be easily seen and photographed. 5 It is not easey as the Loran pulse at the output of the receiver filtor is 250 microseconds wide and the various hops can be 60 microseconds apart and therefore they can overlap. Still much info can be gained. It might be easier to try on a close-by loran tx as the first hop skywave will be separated by at least 250 microseconds and there will be no overlap. One last tinkle from my memory banks. At more southern latitudes like 15 or 20 degrees, the ionosphere is so reflective that one can see a whole train of skywaves first , second. up to sixth or seventh all with strong signal to noise ratios . Thats enough for now all I can say is that when I was busy designing and selling navigation aids for LF skywaves were a pain in the butt. Of course now for amateur communications they are a necessity. One last memory drop At A range of around 800 nm over seawater, the daytime skywave was 6 to 10 db over the ground wave. The night time first hop was 20 to 30 db over the groundwave 73 de John VE1ZJ MarkusVester@aol.com wrote: > Hi LF-group, > > yesterday I put together a small receiving loop for DF, and did a check > tonight on the broadband DGPS signal above 122.5 kHz from Frankfurt. I was > quite surprised to find that close to the loop minimum, the sound of the > noise-like modulation very much varied with the pointing angle, and the > effect was similar to selective fading on shortwave. In one position about 5 > degrees offset, the spectrum contained a deep null, which moved across the > band and changed its depth over a few minutes. Apparently I am seeing the > superposition of the (attenuated) groundwave plus a variing-delay skywave, > whose polarisation has either been modified by Faraday rotation along the > path or by a horizontal current-component in the transmitting antenna. > > This observation brings up another thought: Has someone tried to measure > skywave reflection on LF at near-vertical incidence? > > Difficulties could be expected in separating the skywave from the > well-propagating groundwave, and sub-millisecond time resolution will be > ineffective with a narrowband amateur signal. LORAN could possibly provide > that, but their Marconi antennas are useless here due to their zenith null. > > However, transmitting with a magnetic loop over ground will produce vertical > skywave and groundwave radiation with equal efficiency. For example, Walter > (DJ2LF) has successfully operated a large rotatable tx-loop in his garden two > years ago. The attached graph lines out a proposed experiment to measure > skywave phase and amplitude at steep incidence: > > The transmitting station orients its loop close to the ground-wave minimum, > e.g. 5 deg offset would provide 21 dB reduction. The receiver, say 20 km > away, operates two antennas, > - a magnetic antenna, precisely nulled to the groundwave, but almost > maximally sensitive to the (unrotated) skywave polarization (cos 5° = 0.996), > - a vertical electrical antenna which picks up the weak groundwave as a phase > reference. If needed, it may be decoupled from the loop using a > high-impedance rx input. > > With a skywave path on the order of 200 km, both components will have > comparable fieldstrength. Amplitude and differential-doppler measurements > over several hours should show the reflectivity and changing altitude of the > D-layer. > > If both stations can share a common clock (eg TV stn, VHF link), the > groundwave reference would be expandable, and the TX loop could also be > directed towards the minimum, providing further isolation. > > 73 > Markus, DF6NM > > ------------------------------------------------------------------------ > [Image] From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1782 invoked from network); 17 Jun 2001 18:35:14 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 17 Jun 2001 18:35:14 -0000 Received: (qmail 3869 invoked from network); 17 Jun 2001 18:34:57 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 17 Jun 2001 18:34:57 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15BhJO-0006vA-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 17 Jun 2001 19:30:14 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from imo-m05.mx.aol.com ([64.12.136.8]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15BhJM-0006ub-00 for rsgb_lf_group@blacksheep.org; Sun, 17 Jun 2001 19:30:12 +0100 Received: from DL4YHF@aol.com by imo-m05.mx.aol.com (mail_out_v30.22.) id l.18.e098b5c (4254) for ; Sun, 17 Jun 2001 14:28:59 -0400 (EDT) From: DL4YHF@aol.com Message-ID: <18.e098b5c.285e50ea@aol.com> Date: Sun, 17 Jun 2001 14:28:58 EDT Subject: LF: Test - don't read To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Mailer: AOL 6.0 for Windows DE sub 217 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit Hello,

reflector struck by lightning...? only one mail for the whole weekend..

73 Wolf. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27516 invoked from network); 17 Jun 2001 18:32:42 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 17 Jun 2001 18:32:42 -0000 Received: (qmail 2696 invoked from network); 17 Jun 2001 18:32:24 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 17 Jun 2001 18:32:24 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15BhFt-0006uR-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 17 Jun 2001 19:26:37 +0100 Received: from jubilee.ns.sympatico.ca ([142.177.1.6] helo=mail-ns00s0.ns.sympatico.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15BhFq-0006uM-00 for rsgb_lf_group@blacksheep.org; Sun, 17 Jun 2001 19:26:34 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.83.6]) by mail-ns00s0.ns.sympatico.ca (Post.Office MTA v3.5.3 release 223 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Sun, 17 Jun 2001 15:25:14 -0300 Message-ID: <3B2D2F65.50C7A273@ns.sympatico.ca> Date: Sun, 17 Jun 2001 18:29:58 -0400 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 Jim sri saw no signals last night , the night before, or 2 nights before that 73 de John VE1ZJ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21867 invoked from network); 17 Jun 2001 07:13:09 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 17 Jun 2001 07:13:09 -0000 Received: (qmail 2791 invoked from network); 17 Jun 2001 07:12:50 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 17 Jun 2001 07:12:50 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15BWeF-00013m-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 17 Jun 2001 08:07:03 +0100 Received: from irwell.zetnet.co.uk ([194.247.47.48] helo=zetnet.co.uk ident=root) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15BWeE-00013h-00 for rsgb_lf_group@blacksheep.org; Sun, 17 Jun 2001 08:07:02 +0100 Received: from oemcomputer (man-s106.dialup.zetnet.co.uk [194.247.41.233]) by zetnet.co.uk (8.11.3/8.11.3/Debian 8.11.2-1) with SMTP id f5H76LZ03785 for ; Sun, 17 Jun 2001 08:06:21 +0100 Message-ID: <004d01c0f6fb$ca6959e0$e929f7c2@oemcomputer> From: "John Rabson" To: rsgb_lf_group@blacksheep.org References: <118.698000.285d4165@aol.com> Subject: LF: Re: Loops and steep skywaves Date: Sun, 17 Jun 2001 08:04:01 +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: ----- Original Message ----- From: To: Sent: Sunday, June 17, 2001 12:10 AM Subject: LF: Loops and steep skywaves [...] >Apparently I am seeing the >superposition of the (attenuated) groundwave plus a variing-delay skywave, >whose polarisation has either been modified by [...] or by a horizontal >current-component in the transmitting antenna. If the skywave is of useful strength does this mean that it is worth trying a horizontal radiator, which could be as much as a half wave in length if you have the real estate available? There is a disused airfield near here. Now if I spoke nicely to the owner... 73 de John Rabson G3PAI From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3430 invoked from network); 16 Jun 2001 23:18:31 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 16 Jun 2001 23:18:31 -0000 Received: (qmail 269 invoked from network); 16 Jun 2001 23:18:11 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 16 Jun 2001 23:18:11 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15BPEL-0005kP-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 17 Jun 2001 00:11:49 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from imo-m07.mx.aol.com ([64.12.136.162]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15BPEJ-0005dm-00 for rsgb_lf_group@blacksheep.org; Sun, 17 Jun 2001 00:11:47 +0100 Received: from MarkusVester@aol.com by imo-m07.mx.aol.com (mail_out_v30.22.) id l.118.698000 (18255) for ; Sat, 16 Jun 2001 19:10:29 -0400 (EDT) From: MarkusVester@aol.com Message-ID: <118.698000.285d4165@aol.com> Date: Sat, 16 Jun 2001 19:10:29 EDT Subject: LF: Loops and steep skywaves To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="------------050503060601060307070707" X-Mailer: AOL 4.0.i for Windows 95 sub 72 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: This is a multi-part message in MIME format. --------------050503060601060307070707 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit Hi LF-group, yesterday I put together a small receiving loop for DF, and did a check tonight on the broadband DGPS signal above 122.5 kHz from Frankfurt. I was quite surprised to find that close to the loop minimum, the sound of the noise-like modulation very much varied with the pointing angle, and the effect was similar to selective fading on shortwave. In one position about 5 degrees offset, the spectrum contained a deep null, which moved across the band and changed its depth over a few minutes. Apparently I am seeing the superposition of the (attenuated) groundwave plus a variing-delay skywave, whose polarisation has either been modified by Faraday rotation along the path or by a horizontal current-component in the transmitting antenna. This observation brings up another thought: Has someone tried to measure skywave reflection on LF at near-vertical incidence? Difficulties could be expected in separating the skywave from the well-propagating groundwave, and sub-millisecond time resolution will be ineffective with a narrowband amateur signal. LORAN could possibly provide that, but their Marconi antennas are useless here due to their zenith null. However, transmitting with a magnetic loop over ground will produce vertical skywave and groundwave radiation with equal efficiency. For example, Walter (DJ2LF) has successfully operated a large rotatable tx-loop in his garden two years ago. The attached graph lines out a proposed experiment to measure skywave phase and amplitude at steep incidence: The transmitting station orients its loop close to the ground-wave minimum, e.g. 5 deg offset would provide 21 dB reduction. The receiver, say 20 km away, operates two antennas, - a magnetic antenna, precisely nulled to the groundwave, but almost maximally sensitive to the (unrotated) skywave polarization (cos 5° = 0.996), - a vertical electrical antenna which picks up the weak groundwave as a phase reference. If needed, it may be decoupled from the loop using a high-impedance rx input. With a skywave path on the order of 200 km, both components will have comparable fieldstrength. Amplitude and differential-doppler measurements over several hours should show the reflectivity and changing altitude of the D-layer. If both stations can share a common clock (eg TV stn, VHF link), the groundwave reference would be expandable, and the TX loop could also be directed towards the minimum, providing further isolation. 73 Markus, DF6NM --------------050503060601060307070707 Content-Type: image/gif; name="SKYWAVE.GIF" Content-Transfer-Encoding: base64 Content-Disposition: inline; filename="SKYWAVE.GIF" R0lGODdhQAGgALMAAAAAAL8AAAC/AL+/AAAAv78AvwC/v8DAwICAgP8AAAD/AP//AAAA//8A /wD//////ywAAAAAQAGgAAAE/vDJSau9OOvNu/9gKI5kaZ5oqq5s675wLGtADUx2Ldk7dd++ mXBILBqPJeADqOz1dE8lFEmtWq9YUfNXaS6/3+k0Sy6bz7LtkreGcsNwL3pOr9svaq8UzO2D 74CBglh5XTh8cXCDi4yNMHt/TopriJGOl5iZHTmHXW5BTJIeOWwzcoykGKeaPqknq6ydR5CC ahawsXqxaVS0gbqGu3jBwi6FbYdjpT9MezzLYpZWwEG30ZLL0tPEpcg40ZDZuHRboU6ff807 5ubpnWOExLKy7fXrZ8Dh7/vO7+Pk1YLp47bPHTZRWajNu5WMHsKErgzKGfhmYCNb69Cluybx YEaN/mR0sTnF6cm3kWh8uZpYMlQzlI4wWpzosRItmmYUPrxpMGAZmQzlnavkcxFQSh2HerS3 FF/RnffmWfwZcGbTmu1Q+dTB1FtPduoyLiRU0lrLNwizOa2qrC3Pk2OLyc05t67du0Lx6t0b 8x/fv4ADCx5MuLDhw4gTK17MuLHjx5AjS55MubLly5gza97MubPnz6BDix5NuvSsYR/8xjXN OglqGiRUt569Qaeq2LRzu2brDKZXr7J1C3e4lKlVbcOTv37LHDZy5dAbntQ4dfrD6NgnSWtO 8Hl25dS6Go8a/HtrljfrtSVqvr379/Djy59Pv779+/hrwyqfP3u3b/0F/ggPUgH2t55n/BWY hBQJMtaggiNw1WACiz0IoRYDfkChYiS5lYyF9pUVQgIbJoYTUWGBCB8pLAZHIgUkxvgiByVm cuJ41ynY4o7/XUBhjTVqmEtQKNb01wFIJqnkARfB42SGE8T4AJAjBHnJjVd5V8ySXHKpCZQZ bPgjjB1IKUGJYkZZC5HGZVVXl3DCeWWCaUYp44xknqnnlGruCQiLYsEVBV5xFionKnT6yecG Vo5JppVzqQiIoZR6aRR/aObJKJ5mqgmpXJLWUemolv6CaZ+K0rgnlZ8WE+ocpMaqZC2n+qjq qqm2GqCsvCJp6ohh3glpp5miiomIfPWqbF26/rLQ7J8R7aXstHI9u4K1dgCa7LTUCoPtCXjO GS2h3C67y7cmaqtXudyei5m65LLbrSboIgbvXfK2S++7976Zr76Y1HtYi9L+O68jAg88rr8G H8xIwoURvG7DDi8CMWES40sxwBCBmSpl/c61McdXhGxsZSZvObK5Hfd4Msgpb8BABTPTsTLL ZCGr6Qk1T9CzBj+burAHQQf9gNFIjMoAAzcvGdLQH5NQdAdIZws11TRbULURsS69dNNP6xy1 1FlzsDU5V5tdts9LS9Dz2S4o6/XIYbu8aApTa9222z7z7fdPMcvstddaUzAz3HFzO7ihTJNa d4YXXzA44WvXbHnf/n/LQMDmBOiXtsxrY8434i38OzecjVf6+CmRF264669PTTq4CXBue+dm 2U106JkfnXTDpy/5NaWrW8D5CnnTvPfRy48uxIy33/6R7li/HvrhR6y8uJKpx1l8BbjbzjPv ZV/e9+wldDpB9JtnvMHx1osuP/ZcN31A8N13GcKrreiMOwXiE0HyRGe+AcJAfcbjXOAACL/e GW1vb6uf/ZA0uULt7wX9+t8FAlg9+bEtgplDX/q+xSIOZkB6i5ggl4JXqlFgcGEa1IAJT6gC EZIgXDQoIftOOMM7qJCCw7MgCDpUjt7gAYYi6CEDUWBDESAwAxJjXwMZuLkUNo2FQhwi/puK sxMklkCJD4ghCJp3QBxCcWhSrOL6pujDm+WPeBfsznH61yMxkmCGdjSDGVURuDR2Doxo+OGo tLDFpGzHiywIoBrR8EQ+fo6KfpyUIOGoRTkW5JD+0xwgjcCpPR5RbB3wYx7LMMksVrIqXMRk HV2AwjCOsgidTM0jObBDO5TSexg6SxE/9MlVrmCRdIjlJhbIQylK8pazMgIuMiiYGSFwj+6T oSiB2UZkJuk0Z8xkYJzZSWjOUgJpxASv8vdGSs0NCctE5F+4aadGEhOcr2zEOIUnq8YxLSXq 5MuLzCQjR4LySF2jZ0Dvh7YMxXMuwrpTNv8JUKUJlHv3A6I9/r/WRCJA6aDVSqgnp8e/S3Rt cm8cXursSUFHYDSjCs3hNydWKXKuMEkjpSCTKoqFkxZDWByIpmEcCtGHVpCgvmuETb3Vz5yu dFuMeyhMlyq83gliqOfaaO48RhhzKlWmWI1oUGl6BajGopG9pF5hktrTst7va37jqhX+59VL gHWqVN2pwTKhwfABRqqeYGhi/sUKtoIzMu88TLl24dcwSkavjpGVXArbVsDENTKGuotdG3sh 6EyWd2olW2Ub80fDxs+pQsjsZhfrStiBdgaiHa0w/ihGA7qNfrBdHggP97O2pVa1hKUm8ybn Ogiab6uYg2Bab4vbvurWtbMl4N9+/svc4i7GjsgNrnKDCty0etC5hYEu+ZK73O5St7kuSCh2 GxFd5nm3uugFbwue1brxysC15v3tbg1HORDulrg7w0B73UsG/M6gWfx8GX/nYN9AiLcCrBqw ICg3CPY+SsGzcXB+IUwaCetpvxR2jIX5hOEMM+bAMKrT3TxM4hKb+MQoTrGKV8ziFrv4xTCO sYxnXIUBBRYi+2NJjq3Ri47e4bHK1LFRoiJLHg9RyLPwsdUwuCAj06rJj1CyUUMD5CM62cpu KSKDDoSUsuyIQF6GhpElREcik/kjAMqydXJHHmhwxA0jYRCaewmgLjOjzGiGMzLUfA84V9kT VzaLnclT/mcby1nPYE6ROuRMoEKfWc+QRrSfB00JRDu60neec5w3kmhKt6LNbc60pBn9jEcr WtQPMrTORk3kNoQF0KzutKfxbGhQN5rSsY71pfuHZ0z3+cyaRnWrbe3qXes614q29Z8BzWw+ hlrMlv60nzetbB1Hu9rDRvZZiM1RNhf7130Ow6EX/ZIewetA07Y0sruN61Qj2cqzxrZYTO1k Xcv70+1mtr3vPexP+vrfnNj2oK/d7F7vW9br1verMRRohcub4IHK98OFfWuJR/rXybY4xS8N 7G6UmtRb3jW+ta1xY2c84RFaSTrN7HGBC3rNje64mwl+bGr/+9ueDnOGBD7pLjrHXOe9zivI wQ1zMZx8y0PvN43zuuSlX+rHUnZ6CxBbsqhL/epYz7rWt06aCAAAOw== --------------050503060601060307070707-- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27078 invoked from network); 16 Jun 2001 01:37:41 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by excalibur.plus.net with SMTP; 16 Jun 2001 01:37:41 -0000 Received: (qmail 25153 invoked from network); 16 Jun 2001 01:24:36 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 16 Jun 2001 01:24:36 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15B4vo-0003Wn-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Jun 2001 02:31:20 +0100 Received: from larry.euronet.nl ([194.134.35.138] helo=smtp.wanadoo.nl) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15B4vn-0003Wi-00 for rsgb_lf_group@blacksheep.org; Sat, 16 Jun 2001 02:31:19 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from default (p1200.vcu.wanadoo.nl [194.134.203.181]) by smtp.wanadoo.nl (8.11.3/8.11.3) with SMTP id f5G1UXN09211 for ; Sat, 16 Jun 2001 03:30:33 +0200 (MEST) Message-ID: <200106160130.f5G1UXN09211@smtp.wanadoo.nl> Date: Sat, 16 Jun 2001 3:30:38 +0100 From: "Ko Versteeg" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: 73kHz beacon X-Mailer: FoxMail 2.1 [en] X-FoxAttach: C:\My Documents\M0BMU.jpg MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="------------040708070608080609040204" Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: This is a multi-part message in MIME format. --------------040708070608080609040204 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit At 6/15/01 18:06:00, you wrote: >Dear LF group, > >Thunderstorms permitting, I will be running the 71.924kHz beacon >again tonight from 0000 until 0300 utc. QRSS, 30s dots as usual. > >Cheers, Jim Moritz >73 de M0BMU Hi Jim.. Received ur signal on ±71924.18Khz very well, -54.2dB over 218.2 Miles. No preamp / was used to supress the loud carrier above you, no filter used either as i just forgot to switch it on. See small image attached... 73's Ko Versteeg, NL9222 [Grid: JO22KE - Lat: 52° 12' 15.0"N Long: 04° 51' 40.5"E] http://home.wanadoo.nl/nl9222/index.htm http://leden.tref.nl/~nl9222tv/default.htm --------------040708070608080609040204 Content-Type: image/jpeg; name="M0BMU.jpg" Content-Transfer-Encoding: base64 Content-Disposition: inline; filename="M0BMU.jpg" /9j/4AAQSkZJRgABAQEASABIAAD/2wBDAA0JCgsKCA0LCgsODg0PEyAVExISEyccHhcgLikx MC4pLSwzOko+MzZGNywtQFdBRkxOUlNSMj5aYVpQYEpRUk//2wBDAQ4ODhMREyYVFSZPNS01 T09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT0//wAAR CAAvAlsDASIAAhEBAxEB/8QAGwABAAIDAQEAAAAAAAAAAAAAAAEGAgMFBwT/xABCEAABAwMC AggEAgcECwAAAAABAAIDBAUREiEGMQcTFCJBUWGBMnGRoRUjF0JiscHR0iQ1dLMzUlSCkpOk ssLi8P/EABcBAQEBAQAAAAAAAAAAAAAAAAABAgP/xAAeEQEBAQACAgMBAAAAAAAAAAAAAREC IRIxQVFhA//aAAwDAQACEQMRAD8A8wREQEREBEU7eCCEU81CAiIgIiICIiAiIgIiICIiCcKE RARFOCghEUgeuEEIikY8UEIpUICKQC44H71LmlpwcexyrlzRiiLIMJGdh8yklvoYoiKAiIgI 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bmDZNPLO8yTyvkedy57i4n3Kw2UImgsmjVzcB81iiS4J3byP0KEk8yoRNEhxHJQiJokeqk4H wnPssUSUZg4ILmkjy5LN87nM0N7rfIZ/mtSha87JkTBERYUREQFkHuAwHED5rFFdsE5yd8lD jwyoRNBSTlQimgiIgIiIM2mMA62uJ9HY/gsT6KEVt0ERFAWbCwHL2l3oDhYIrLg6Mdyp44tD LPQ6/CVxlc76F+n7L4ZXuleXuDAT4NAaPoFgivlbMTBERZUWepxbpDR7NGVgistgncHcfVQi JaCIigLbBM+F2pksjD+w7BWpFZcuwZyyGR5c5z3E+LnZKxBwchQiW23RsdNM5ul0ry3yJ2Vw 6LGVb+JagUM8EMnY3ZdNCZARrZtgObvy3yqWrZ0cUnbL/PH+HUNfilc7qqx2GDvs7w7jt98c vE7pbb7Hr0tBX1dHJTXCtppGvfGfyaZ0YLGvBexwL3ag4DT8ic55L6auj7TU0M3WaeyTmbGM 6sxvZj0+PPsvqRQcmrtldUza/wATaxsLpJKVwpwXxSOY5gLjnS5rQ92BpB2bknfOMFkLqWOm uMsUjIH9ZAaQS072PIcHOLxIXOJ1HJzvkk5yuwiCs3agba+Cqa3tkdKKeSkj1uJJcRNHk7k4 HkM4A2GwXyrrcXf3C7/E03+fGuSunBjk/9k= --------------040708070608080609040204-- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17180 invoked from network); 15 Jun 2001 21:11:41 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 15 Jun 2001 21:11:41 -0000 Received: (qmail 3695 invoked from network); 15 Jun 2001 20:58:42 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 15 Jun 2001 20:58:42 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15B0mQ-0001DS-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Jun 2001 22:05:22 +0100 Received: from fep04.swip.net ([130.244.199.132] helo=fep04-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15B0mP-0001DN-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Jun 2001 22:05:21 +0100 Received: from W98 ([212.151.14.232]) by fep04-svc.swip.net with SMTP id <20010615210418.VYF9554.fep04-svc.swip.net@W98> for ; Fri, 15 Jun 2001 23:04:18 +0200 Message-ID: <005701c0f5de$bd6f32a0$041a97d4@W98.swipnet.se> From: "C Andersson" To: rsgb_lf_group@blacksheep.org Subject: LF: SV: SK6DK Reception Date: Fri, 15 Jun 2001 23:03:36 +0200 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 got the following information from Bengt, SM6OEW concerning the operation from SK6DK: TX PWR was in the region of 100W. The receivers in use was an Icom 745 and an Icom R75, none of them with narrow filters. They had brought a frame loop for reception but unfortunately something happened with it during the transport and it was not working when they arrived at Grimeton. The inv L antenna was therefore used also for reception. There will be another try on JUNE 26, approx. between 17-19 UTC. 73 Christer sm6pxj From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 949 invoked from network); 15 Jun 2001 20:31:56 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by excalibur.plus.net with SMTP; 15 Jun 2001 20:31:56 -0000 Received: (qmail 4972 invoked from network); 15 Jun 2001 20:18:18 -0000 Content-Transfer-Encoding: 8bit Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 15 Jun 2001 20:18:18 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15B0A4-0000q8-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Jun 2001 21:25:44 +0100 Received: from k2.pncl.co.uk ([212.35.226.183]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15B0A3-0000q3-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Jun 2001 21:25:43 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from 233.pncl.co.uk (147.235.35.212.in-addr.arpa.ip-pool.cix.co.uk [212.35.235.147]) by k2.pncl.co.uk (8.11.3/8.11.3) with ESMTP id f5FKP2Z01471 for ; Fri, 15 Jun 2001 21:25:03 +0100 Message-ID: <5.0.2.1.2.20010615212411.00a01090@mail.pncl.co.uk> X-Sender: blanch@mail.pncl.co.uk X-Mailer: QUALCOMM Windows Eudora Version 5.0.2 Date: Fri, 15 Jun 2001 21:26:20 +0100 To: rsgb_lf_group@blacksheep.org From: "Walter Blanchard" Subject: Re: LF: Decca 80325 In-reply-to: <200106151956.f5FJuXb24029@smtp.wanadoo.nl> 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 21:56 15/06/01 Friday, Ko wrote: >Hi all.. > > [Due to blocking the sun from the Xyl] >I am searching for info on the "Decca 80325" [active lf antenna] >Info on performance, is it noisy like the DX-One, or links would be great. I have the cct diagram and handbook write-up. It's very good. Will send when I've scanned it in. Walter G3JKV. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2039 invoked from network); 15 Jun 2001 20:03:25 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by excalibur.plus.net with SMTP; 15 Jun 2001 20:03:25 -0000 Received: (qmail 8275 invoked from network); 15 Jun 2001 19:50:20 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 15 Jun 2001 19:50:20 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Azif-0000fy-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Jun 2001 20:57:25 +0100 Received: from smtp.wanadoo.nl ([194.134.193.6]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Azie-0000ft-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Jun 2001 20:57:25 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from default (p1390.vcu.wanadoo.nl [194.134.170.115]) by smtp.wanadoo.nl (8.11.2/8.11.2) with SMTP id f5FJuXb24029; Fri, 15 Jun 2001 21:56:33 +0200 (MET DST) Message-ID: <200106151956.f5FJuXb24029@smtp.wanadoo.nl> Date: Fri, 15 Jun 2001 21:56:37 +0100 From: "Ko Versteeg" To: "LWCA Board" Cc: "Lf Amrad" , "LF RSGB" , "Lofexp" , "LongwaveRadio" , "Lowfer" , "LowFer" , "Canadian LowFer" Subject: LF: Decca 80325 X-Mailer: FoxMail 2.1 [en] 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: Hi all.. [Due to blocking the sun from the Xyl] I am searching for info on the "Decca 80325" [active lf antenna] Info on performance, is it noisy like the DX-One, or links would be great. 73 de Ko, NL9222 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 130 invoked from network); 15 Jun 2001 20:00:06 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 15 Jun 2001 20:00:06 -0000 Received: (qmail 1574 invoked from network); 15 Jun 2001 19:47:07 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 15 Jun 2001 19:47:07 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Azep-0000ZT-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Jun 2001 20:53:27 +0100 Received: from k2.pncl.co.uk ([212.35.226.183]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Azen-0000ZO-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Jun 2001 20:53:26 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from 233.pncl.co.uk (163.235.35.212.in-addr.arpa.ip-pool.cix.co.uk [212.35.235.163]) by k2.pncl.co.uk (8.11.3/8.11.3) with ESMTP id f5FJqZe31545 for ; Fri, 15 Jun 2001 20:52:35 +0100 Message-ID: <5.0.2.1.2.20010615204953.009f1ec0@mail.pncl.co.uk> X-Sender: blanch@mail.pncl.co.uk (Unverified) X-Mailer: QUALCOMM Windows Eudora Version 5.0.2 Date: Fri, 15 Jun 2001 20:53:23 +0100 To: rsgb_lf_group@blacksheep.org From: "Walter Blanchard" Subject: LF: Loran 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: Flg refers to Loran Soustons (near Biarritz) so not directly of interest here but might be to any F stations. CONTROL CENTER OF BREST North Europe LORAN System loranccb@cedocar.fr Fax 33 298276054 Tél 33 298230248 33 298230249 33 298276044 NELS' USERS INFORMATION : AUTM Pages Telefax Number Date 1 N 128/01/CCB 15/06/01 20:43 NORTHWEST EUROPEAN LORAN-C SYSTEM, NELS WARNING OF AUTHORIZED UNUSABLE TIME (AUTM). LORAN-C TRANSMITTER SOUSTONS Base line concerning : GRI 6731 M - X Reason: ANTENNA CHECK Subject : LORAN C STATION SOUSTONS, WILL BE UNUSABLE Periods : WEEK DAY DATE PERIOD ALTERNATIVE - PERIOD 25 WEDNESDAY 20.06.01 0600Z - 1600Z 25 THURSDAY 21.06.01 0600Z - 1600Z Points of contact : Control Center of Brest : Reference above Loran station Soustons : Tel : +335 58 41 55 32 Fax : +335 58 41 29 12 Rémi Ansquer Chief Operator From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9171 invoked from network); 15 Jun 2001 17:10:53 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 15 Jun 2001 17:10:53 -0000 Received: (qmail 22683 invoked from network); 15 Jun 2001 17:10:01 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 15 Jun 2001 17:10:01 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Ax2v-0007jg-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Jun 2001 18:06:09 +0100 X-MSMail-Priority: Normal Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Ax2u-0007jb-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Jun 2001 18:06:08 +0100 Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 15Ax2G-0005zt-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Jun 2001 18:05:28 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.232.252] (helo=mj9ar) by gemini.herts.ac.uk with smtp (Exim 3.22 #2) id 15Ax2G-0005Ec-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Jun 2001 18:05:28 +0100 From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Fri, 15 Jun 2001 18:06:37 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: 73kHz beacon X-Mailer: Pegasus Mail for Win32 (v3.11) Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF group, Thunderstorms permitting, I will be running the 71.924kHz beacon again tonight from 0000 until 0300 utc. QRSS, 30s dots as usual. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24747 invoked from network); 15 Jun 2001 16:09:04 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 15 Jun 2001 16:09:04 -0000 Received: (qmail 4789 invoked from network); 15 Jun 2001 16:08:43 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 15 Jun 2001 16:08:43 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Aw34-0007CR-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Jun 2001 17:02:14 +0100 Received: from mail.ifx.com.br ([200.201.133.66] helo=audi.ifx.com.br) by post.thorcom.com with smtp (Exim 3.16 #2) id 15Aw32-0007CM-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Jun 2001 17:02:13 +0100 Received: (qmail 8720 invoked from network); 15 Jun 2001 16:01:10 -0000 Received: from unknown (HELO PIII800) (200.201.143.30) by mail.ifxbrasil.com.br with SMTP; 15 Jun 2001 16:01:10 -0000 Message-ID: <001401c0f5b4$b8d8aca0$1e8fc9c8@PIII800> From: "PY3CRX PY2PLL" To: rsgb_lf_group@blacksheep.org References: <3e.d1e079b.285b50e8@aol.com> Subject: LF: Re: Spectrum Lab uploaded again Date: Fri, 15 Jun 2001 13:01:15 -0300 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 ...
 
Very nice performance, using a P III 800, 312MB RAM, P133 Motherboard with built in sound card (SIS630).
 
Able to receive:
 
MSK: 16KHz(GBR)/18.3KHz(FR)/19.8KHz(AUS)/20.1KHz/20,9KHz and 21.4KHz
 
Morse: VTX3(India) 18.2KHz , as usual.
 
Using 80m inverted Vee, isolation transformer 2700:600 ohm.
 
73
Marcus, PY3CRX/PY2PLL
GG66rf
http://py.qsl.br
Active from "DC" to 24GHz
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6947 invoked from network); 15 Jun 2001 13:37:30 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 15 Jun 2001 13:37:30 -0000 Received: (qmail 1692 invoked from network); 15 Jun 2001 13:37:15 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 15 Jun 2001 13:37:15 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Atgr-0005vM-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Jun 2001 14:31:09 +0100 Received: from ns3.swh.sk ([192.108.125.37]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Atgc-0005vH-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Jun 2001 14:30:55 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from hermes.swh.sk (hermes [192.108.125.60]) by ns3.swh.sk (8.11.0/8.11.0) with ESMTP id f5FDaiS25608 for ; Fri, 15 Jun 2001 15:36:45 +0200 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 PAA08417 for ; Fri, 15 Jun 2001 15:30:02 +0200 (MET DST) Received: by btss.swh.sk with Internet Mail Service (5.5.2653.19) id ; Fri, 15 Jun 2001 15:30:00 +0200 Message-ID: <29BDD4F529FCD311B631009027357C4E0225876E@btss103a.swh.sk> From: "Gasparik Richard" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: SK6DK Date: Fri, 15 Jun 2001 15:29:55 +0200 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) 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
Hi LF-ers...
 
I was on the band, but the static noise was very high. Nothing heard from SK6DK...
 
73 de Rich OM2TW
-----Original Message-----
From: Dick Rollema [mailto:d.w.rollema@freeler.nl]
Sent: Friday, June 15, 2001 10:45 AM
To: LF-Group
Subject: LF: SK6DK

To All from PA0SE
 
Friday at 1900 UTC I heard SK6DK with a RST 599 signal. Called them in vain.
 
73, Dick, PA0SE
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18008 invoked from network); 15 Jun 2001 11:58:34 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 15 Jun 2001 11:58:34 -0000 Received: (qmail 17326 invoked from network); 15 Jun 2001 11:58:12 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 15 Jun 2001 11:58:12 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15AsAS-000524-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Jun 2001 12:53:36 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from imo-r10.mx.aol.com ([152.163.225.106]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15AsA4-00051v-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Jun 2001 12:53:12 +0100 Received: from DL4YHF@aol.com by imo-r10.mx.aol.com (mail_out_v30.22.) id l.3e.d1e079b (7556) for ; Fri, 15 Jun 2001 07:52:09 -0400 (EDT) From: DL4YHF@aol.com Message-ID: <3e.d1e079b.285b50e8@aol.com> Date: Fri, 15 Jun 2001 07:52:08 EDT Subject: LF: Spectrum Lab uploaded again To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Mailer: AOL 6.0 for Windows DE sub 217 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit Hello group,

As reported, the software archive was not complete. Something must have
truncated the archive, though the FTP programme said "transfer completed".
The correct file size of spectr_i.zip is 665210 bytes.
I have just uploaded it again to this site:

http://members.aol.com/dl4yhfhamsoft/spectr_i.zip     .   

If you want to try the VLF 'software' RX, load the settings from
"GBRrcvr.usr" with the Quick Settings menu (it is better than the older
"SAQrcvr" receiver, and I hope it will also work for the coming SAQ
transmissions if you move the VFO from 16kHz to 17.2kHz).

If you install Spectrum Lab for the first time, you may need Borland's
VCL40.DLL which you can download from a link on
www.qsl.net/dl4yhf/spectra1.html


Sorry for the faulty upload. I have now downloaded the file for testing
purposes and found no errors in the installation process.

73  Wolf. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14859 invoked from network); 15 Jun 2001 11:18:11 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 15 Jun 2001 11:18:11 -0000 Received: (qmail 2824 invoked from network); 15 Jun 2001 11:17:18 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 15 Jun 2001 11:17:18 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15ArVS-0004fH-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Jun 2001 12:11:14 +0100 Received: from rubellite.lion-access.net ([212.19.217.4]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15ArVS-0004fC-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Jun 2001 12:11:14 +0100 Received: from w8k3f0 (1Cust16.tnt9.rtm1.nl.uu.net [213.116.112.16]) by rubellite.lion-access.net (I-Lab) with SMTP id 56A7628C3 for ; Fri, 15 Jun 2001 11:09:58 +0000 (GMT) Message-ID: <000c01c0f58c$7690c6c0$107074d5@w8k3f0> From: "Dick Rollema" To: "LF-Group" References: <3.0.1.16.20010615112824.314741de@mail.cc.kuleuven.ac.be> Subject: Re: LF: SK6DK Date: Fri, 15 Jun 2001 13:14:07 +0200 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 It was Thursday ... Sorry 73, Dick, PA0SE ----- Oorspronkelijk bericht ----- Van: Rik Strobbe Aan: Dick Rollema Verzonden: vrijdag 15 juni 2001 11:28 Onderwerp: Re: LF: SK6DK > ??? > > het is nu nog maar vrijdag 10.30 UTC. > > 73, Rik > > > >Friday at 1900 UTC I heard SK6DK with a RST 599 signal. Called them in vain. > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12603 invoked from network); 15 Jun 2001 11:01:30 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 15 Jun 2001 11:01:30 -0000 Received: (qmail 12297 invoked from network); 15 Jun 2001 11:00:37 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 15 Jun 2001 11:00:37 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15ArEz-0004W9-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Jun 2001 11:54:13 +0100 X-MSMail-Priority: Normal Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15ArEw-0004W4-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Jun 2001 11:54:10 +0100 Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 15ArEJ-0002op-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Jun 2001 11:53:31 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.232.252] (helo=mj9ar) by gemini.herts.ac.uk with smtp (Exim 3.22 #2) id 15ArEI-0001Zf-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Jun 2001 11:53:30 +0100 From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Fri, 15 Jun 2001 11:54:40 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: SK6DK Reception X-Mailer: Pegasus Mail for Win32 (v3.11) Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF Group, I heard SK6DK in QSO with DJ9IE around 1920utc last night, on 135.9kHz. However, they shut down immediately afterwards, and I was unable to call them. The signal was rather good at my QTH, about 579; however, they gave Uli only an S2 report, so reception may have been a problem. Still, it's a good start. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14454 invoked from network); 15 Jun 2001 09:27:21 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 15 Jun 2001 09:27:21 -0000 Received: (qmail 20047 invoked from network); 15 Jun 2001 09:26:29 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 15 Jun 2001 09:26:29 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Aplf-0003iJ-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Jun 2001 10:19:51 +0100 Received: from rubellite.lion-access.net ([212.19.217.4]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Aplb-0003iC-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Jun 2001 10:19:47 +0100 Received: from w8k3f0 (1Cust156.tnt9.rtm1.nl.uu.net [213.116.112.156]) by rubellite.lion-access.net (I-Lab) with SMTP id 908FC2F2B for ; Fri, 15 Jun 2001 09:17:28 +0000 (GMT) Message-ID: <002a01c0f57c$bf5f0840$9c7074d5@w8k3f0> From: "Dick Rollema" To: "LF-Group" Subject: LF: SK6DK Date: Fri, 15 Jun 2001 10:45:03 +0200 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
 
Friday at 1900 UTC I heard SK6DK with a RST 599 signal. Called them in vain.
 
73, Dick, PA0SE
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5258 invoked from network); 15 Jun 2001 07:58:57 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 15 Jun 2001 07:58:57 -0000 Received: (qmail 9008 invoked from network); 15 Jun 2001 07:58:42 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 15 Jun 2001 07:58:42 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15AoGV-0002tz-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Jun 2001 08:43:35 +0100 Received: from ns1.connectfree.co.uk ([212.1.130.32] helo=radius.connectfree.net) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15AoGR-0002tu-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Jun 2001 08:43:31 +0100 Received: from dave (ppp-2-82.cvx5.telinco.net [212.1.153.82]) by radius.connectfree.net (8.9.1/8.9.0) with SMTP id JAA21695 for ; Fri, 15 Jun 2001 09:15:03 +0100 Message-ID: <001501c0f56f$235c4b40$529901d4@dave> From: "Dave Sergeant" To: "rsgb_lf_group" Subject: LF: re: Loran Date: Fri, 15 Jun 2001 08:25:03 +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 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 Sorry that my previous postings arrived 24 hours late - problems at the mill with BTinternet it seems.... Thanks Walter for the postings of the Lessay off schedules, it certainly would be helpful to have these in future. Lessay was off Thursday briefly first thing in the morning - presumably they had finished their work earlier than expected and it was on for the rest of the day. I now know that Loran is the limiting factor for reception at this QTH, not local QRN. 73s Dave dsergeant@iee.org dsergeant@connectfree.co.uk http://www.dsergeant.btinternet.co.uk From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20110 invoked from network); 15 Jun 2001 03:13:04 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 15 Jun 2001 03:13:04 -0000 Received: (qmail 873 invoked from network); 15 Jun 2001 03:12:49 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 15 Jun 2001 03:12:49 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15AjvN-0000hE-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Jun 2001 04:05:29 +0100 Received: from [194.73.242.5] (helo=wmpmta03-app.mail-store.com) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15AjvL-0000h6-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Jun 2001 04:05:27 +0100 Received: from rhenium ([194.73.73.93]) by wmpmta03-app.mail-store.com (InterMail vM.5.01.02.00 201-253-122-103-101-20001108) with ESMTP id <20010615030416.ZEV27774.wmpmta03-app.mail-store.com@rhenium> for ; Fri, 15 Jun 2001 04:04:16 +0100 Received: from [62.7.116.170] (helo=dave) by gadolinium.btinternet.com with smtp (Exim 3.22 #9) id 15APir-0005cj-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Jun 2001 06:31:13 +0100 Message-ID: <000201c0f493$941ef300$aa74073e@dave> From: "Dave Sergeant" To: rsgb_lf_group@blacksheep.org References: <000801c0f341$50067c40$255501d5@dave> Subject: LF: Re: Loran Date: Thu, 14 Jun 2001 06:31:39 +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: >From Dave G3YMC Loran was off the air also for most of Wednesday. Sadly there was little activity, although I did have QSOs with John G4CNN ('best signal ever Dave') and G8RW. Rising thunder static after lunchtime then made the band unusable - even the static sounded clearer! Perhaps it will be off again today. 73s Dave dsergeant@iee.org dsergeant@connectfree.co.uk http://www.dsergeant.btinternet.co.uk From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16217 invoked from network); 15 Jun 2001 00:17:37 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 15 Jun 2001 00:17:37 -0000 Received: (qmail 19896 invoked from network); 15 Jun 2001 00:17:17 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 15 Jun 2001 00:17:17 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15AhC9-0007nV-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Jun 2001 01:10:37 +0100 Received: from tor-smtp3.attcanada.ca ([207.181.101.71] helo=attcanada.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15AhC7-0007nQ-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Jun 2001 01:10:35 +0100 Received: from david (ham-on53-119.netcom.ca [142.154.65.247]) by attcanada.ca (8.8.7-s-4/8.8.7) with SMTP id UAA29344 for ; Thu, 14 Jun 2001 20:09:50 -0400 (EDT) Message-ID: <015a01c0f527$0daf5d20$6655872c@david> From: "Tenty" To: rsgb_lf_group@blacksheep.org References: <84.17611793.285a7cf6@aol.com> Subject: LF: Re: Spectrum Lab - new functions Date: Fri, 15 Jun 2001 00:09:23 +0100 Organization: Holland Data and Wireless MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2462.0000 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 Wolf,
 
I tried to download your latest version but I can't open de zip file as it seems
to be corrupted..(non valid archive)
I downloaded it a couple of times but same thing happened..
 
 
73, Bob ve3tok
----- Original Message -----
Sent: June 14, 2001 21:47 PM
Subject: LF: Spectrum Lab - new functions

Hi Alan, Brian, Peter,

and others playing with Spectrum Lab:
I have just uploaded a slightly improved version of the program to its "main"
site (not the 'beta' site, though it still has 'beta' status) :

http://members.aol.com/dl4yhfhamsoft/spectr_i.zip     .  

Modified or new:
- the value returned by the noise detection function (based on G4JNTs
algorithm) can now be 'normalized' for a RX bandwidth of 1 Hz, making it no
longer dependent on the current FFT settings.

- demo file for the "software VLF receiver" now supports easy changing of the
 "VFO frequency" simply by moving a marker on the frequency axis of the
spectrum graph, also the volume of the filter output can now be changed
without having to change the filter itself (click on the amplifier symbol in
the circuit window, this is not described in the manual yet).

- sideband rejection of the VLF receiver improved (better 90 degree phase
shifter, if your PC is fast enough you can increast the length of the Hilbert
transformer. Not described in the manual yet...)

- Inaccuracy of the "cursor" function with horizontal running waterfall has
been fixed, thanks Brian !

Thanks to all testers for their time and patience. The uploaded version is
"V1.65 beta 8". Good luck with it !

73, Wolf DL4YHF.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14812 invoked from network); 14 Jun 2001 20:54:34 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 14 Jun 2001 20:54:34 -0000 Received: (qmail 29293 invoked from network); 14 Jun 2001 20:54:14 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 14 Jun 2001 20:54:14 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Ae2e-00064u-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 14 Jun 2001 21:48:36 +0100 Received: from imo-r08.mx.aol.com ([152.163.225.104]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Ae2d-00064p-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Jun 2001 21:48:35 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from DL4YHF@aol.com by imo-r08.mx.aol.com (mail_out_v30.22.) id l.84.17611793 (3936); Thu, 14 Jun 2001 16:47:51 -0400 (EDT) From: DL4YHF@aol.com Message-ID: <84.17611793.285a7cf6@aol.com> Date: Thu, 14 Jun 2001 16:47:50 EDT Subject: LF: Spectrum Lab - new functions To: rsgb_lf_group@blacksheep.org Cc: nils.schiffhauer@metronet.de MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Mailer: AOL 6.0 for Windows DE sub 217 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit Hi Alan, Brian, Peter,

and others playing with Spectrum Lab:
I have just uploaded a slightly improved version of the program to its "main"
site (not the 'beta' site, though it still has 'beta' status) :

http://members.aol.com/dl4yhfhamsoft/spectr_i.zip     .  

Modified or new:
- the value returned by the noise detection function (based on G4JNTs
algorithm) can now be 'normalized' for a RX bandwidth of 1 Hz, making it no
longer dependent on the current FFT settings.

- demo file for the "software VLF receiver" now supports easy changing of the
 "VFO frequency" simply by moving a marker on the frequency axis of the
spectrum graph, also the volume of the filter output can now be changed
without having to change the filter itself (click on the amplifier symbol in
the circuit window, this is not described in the manual yet).

- sideband rejection of the VLF receiver improved (better 90 degree phase
shifter, if your PC is fast enough you can increast the length of the Hilbert
transformer. Not described in the manual yet...)

- Inaccuracy of the "cursor" function with horizontal running waterfall has
been fixed, thanks Brian !

Thanks to all testers for their time and patience. The uploaded version is
"V1.65 beta 8". Good luck with it !

73, Wolf DL4YHF. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7132 invoked from network); 14 Jun 2001 15:49:14 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 14 Jun 2001 15:49:14 -0000 Received: (qmail 22344 invoked from network); 14 Jun 2001 15:48:54 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 14 Jun 2001 15:48:54 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15AZGg-0003at-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 14 Jun 2001 16:42:46 +0100 Received: from imo-d05.mx.aol.com ([205.188.157.37]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15AZGd-0003al-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Jun 2001 16:42:43 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from G0MRF@aol.com by imo-d05.mx.aol.com (mail_out_v30.22.) id l.f2.b906e18 (3858) for ; Thu, 14 Jun 2001 11:41:31 -0400 (EDT) From: G0MRF@aol.com Message-ID: Date: Thu, 14 Jun 2001 11:41:31 EDT Subject: Re: LF: 32 PPR ENCODER 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 107 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In a message dated 6/14/01 9:34:22 AM GMT Daylight Time, Richard.Gasparik@sbs.sk writes: << Subj: LF: 32 PPR ENCODER Date: 6/14/01 9:34:22 AM GMT Daylight Time From: Richard.Gasparik@sbs.sk (Gasparik Richard) Sender: majordom@post.thorcom.com Reply-to: rsgb_lf_group@blacksheep.org To: rsgb_lf_group@blacksheep.org (Rsgb_Lf_Group (E-mail)) Hi LF-ers... I want the 32 PPR ENCODER for my DDS. I can't find it in OM/OK/OE. Can you help me please ? Rich OM2TW >> Haven't checked the full range, but the RS Components part I use is 24PPR and costs less than 3 UK pounds Part No: 265 1723 73 David 'MRF From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18961 invoked from network); 14 Jun 2001 14:49:35 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 14 Jun 2001 14:49:35 -0000 Received: (qmail 12223 invoked from network); 14 Jun 2001 14:49:20 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 14 Jun 2001 14:49:20 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15AYLR-00032w-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 14 Jun 2001 15:43:37 +0100 X-MSMail-Priority: Normal Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15AYLN-00032q-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Jun 2001 15:43:33 +0100 Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 15AYKk-0004qg-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Jun 2001 15:42:54 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.232.252] (helo=mj9ar) by gemini.herts.ac.uk with smtp (Exim 3.22 #2) id 15AYKj-0001mg-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Jun 2001 15:42:53 +0100 From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Thu, 14 Jun 2001 15:44:01 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: No 73k beacon tonight X-Mailer: Pegasus Mail for Win32 (v3.11) Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF group, Will be giving the 73k TX a rest tonight and getting tucked up in bed early. Will resume the beacon signals on Friday night/Saturday morning. Last night's beacon signal was on 71.924kHz from 2355utc until 0305utc. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4314 invoked from network); 14 Jun 2001 13:11:31 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 14 Jun 2001 13:11:31 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 14156 invoked from network); 14 Jun 2001 13:11:12 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 14 Jun 2001 13:11:12 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15AWnP-00027K-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 14 Jun 2001 14:04:23 +0100 Received: from tele-post-20.mail.demon.net ([194.217.242.20]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15AWnO-00027F-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Jun 2001 14:04:22 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from telemetry.demon.co.uk ([194.222.19.114]) by tele-post-20.mail.demon.net with smtp (Exim 2.12 #2) id 15AWmg-000HSo-0K for rsgb_lf_group@blacksheep.org; Thu, 14 Jun 2001 13:03:38 +0000 Message-ID: Date: Thu, 14 Jun 2001 13:00:23 +0100 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: Re: LF: Lessay In-reply-to: <5.0.2.1.2.20010614080809.00a05c50@mail.pncl.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: G3JKV wrote: >Copy of NELS notification of Lessay off-air time. I don't always get these >but if in future I see one with a significant off-air time I'll post it >here. Thank you Walter, that would be most useful. 73, Tom G3OLB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3432 invoked from network); 14 Jun 2001 08:36:22 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 14 Jun 2001 08:36:22 -0000 Received: (qmail 3268 invoked from network); 14 Jun 2001 08:36:02 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 14 Jun 2001 08:36:02 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15ASWd-0008Po-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 14 Jun 2001 09:30:47 +0100 Received: from ns3.swh.sk ([192.108.125.37]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15ASWb-0008Pj-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Jun 2001 09:30:45 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from hermes.swh.sk (hermes [192.108.125.60]) by ns3.swh.sk (8.11.0/8.11.0) with ESMTP id f5E8ahS29516 for ; Thu, 14 Jun 2001 10:36:43 +0200 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 KAA23992 for ; Thu, 14 Jun 2001 10:30:01 +0200 (MET DST) Received: by btss.swh.sk with Internet Mail Service (5.5.2653.19) id ; Thu, 14 Jun 2001 10:29:58 +0200 Message-ID: <29BDD4F529FCD311B631009027357C4E02258765@btss103a.swh.sk> From: "Gasparik Richard" To: "Rsgb_Lf_Group \(E-mail\)" Subject: LF: 32 PPR ENCODER Date: Thu, 14 Jun 2001 10:29:57 +0200 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) 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 want the 32 PPR ENCODER for my DDS. I can't find it in OM/OK/OE. Can you help me please ? Rich OM2TW From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25521 invoked from network); 14 Jun 2001 08:17:33 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 14 Jun 2001 08:17:33 -0000 Received: (qmail 8301 invoked from network); 14 Jun 2001 08:17:18 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 14 Jun 2001 08:17:18 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15AS9I-0008AV-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 14 Jun 2001 09:06:40 +0100 Received: from tungsten.btinternet.com ([194.73.73.81]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15AS9H-0008AQ-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Jun 2001 09:06:39 +0100 Received: from [62.7.76.199] (helo=default) by tungsten.btinternet.com with smtp (Exim 3.22 #9) id 15AS8c-0002qB-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Jun 2001 09:05:59 +0100 Message-ID: <000701c0f4a8$b7a375c0$c74c073e@default> From: "Alan Melia" To: "LF-Group" Subject: LF: re Loran Date: Thu, 14 Jun 2001 08:51:25 +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 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 Walter thanks for the message on the Lessay 'off' times. They have obviously finished without using their full planned time as it is 'puttering' away again this morning at 0700z. It is certainly interesting to see what the difference without it is, even at my location (Ipswich). It is quite eerie to listen to 136 after all this time, without it in the background. 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 4961 invoked from network); 14 Jun 2001 07:21:44 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 14 Jun 2001 07:21:44 -0000 Received: (qmail 20366 invoked from network); 14 Jun 2001 07:21:25 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 14 Jun 2001 07:21:25 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15ARI2-0007fE-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 14 Jun 2001 08:11:38 +0100 Received: from k2.pncl.co.uk ([212.35.226.183]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15ARI0-0007f9-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Jun 2001 08:11:37 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from 233.pncl.co.uk (21.234.35.212.in-addr.arpa.ip-pool.cix.co.uk [212.35.234.21]) by k2.pncl.co.uk (8.11.3/8.11.3) with ESMTP id f5E7Au513085 for ; Thu, 14 Jun 2001 08:10:57 +0100 Message-ID: <5.0.2.1.2.20010614080809.00a05c50@mail.pncl.co.uk> X-Sender: blanch@mail.pncl.co.uk X-Mailer: QUALCOMM Windows Eudora Version 5.0.2 Date: Thu, 14 Jun 2001 08:11:45 +0100 To: rsgb_lf_group@blacksheep.org From: "Walter Blanchard" Subject: LF: Lessay 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: Copy of NELS notification of Lessay off-air time. I don't always get these but if in future I see one with a significant off-air time I'll post it here. Please don't bombard the poor engineer with requests to switch it off! Walter G3JKV. Quote: CONTROL CENTER OF BREST North Europe LORAN System email loranccb@cedocar.fr Fax 33 298276054 Tél 33 298230248 33 298230249 33 298276044 TO NELS' USER INFORMATION : AUTM N° 123/01/CCB 14/06/01 08:02 NORTHWEST EUROPEAN LORAN-C SYSTEM, NELS WARNING OF AUTHORIZED UNUSABLE TIME (AUTM). LORAN-C TRANSMITTER LESSAY Base line concerning : GRI 6731 M - X . M - Z /GRI 7499 M - X . Reason: ANTENNA CHECK Subject : LORAN C STATION LESSAY, WILL BE UNUSABLE Periods : WEEK DAY DATE PERIOD ALTERNATIVE - PERIOD 24 TUESDAY 12.06.01 0700Z - 1100Z 24 WEDNESDAY 13.06.01 0600Z - 1600Z 24 THURSDAY 14.06.01 0600Z - 1600Z Points of contact : Control Center of Brest : Reference above Loran station LESSAY : TEL : 33 233450416 Fax : 33 233450527 Alain Tassart Chief Operator From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19964 invoked from network); 14 Jun 2001 05:17:23 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 14 Jun 2001 05:17:23 -0000 Received: (qmail 26811 invoked from network); 14 Jun 2001 05:17:08 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 14 Jun 2001 05:17:08 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15APRC-0006pQ-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 14 Jun 2001 06:12:58 +0100 Received: from fep03.swip.net ([130.244.199.131] helo=fep03-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15APRA-0006pL-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Jun 2001 06:12:56 +0100 Received: from W98 ([212.151.104.40]) by fep03-svc.swip.net with SMTP id <20010614051318.EFGO3284.fep03-svc.swip.net@W98> for ; Thu, 14 Jun 2001 07:13:18 +0200 Message-ID: <000e01c0f490$88595e00$286897d4@W98.swipnet.se> From: "C Andersson" To: rsgb_lf_group@blacksheep.org Subject: SV: LF: SK6DK on 137.6 Thursday evening Date: Thu, 14 Jun 2001 07:11:55 +0200 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 > What mode will they be transmitting? 73 de John VE1ZJ Hand keyed CW as far as I know. /Christer From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20064 invoked from network); 13 Jun 2001 22:55:14 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 13 Jun 2001 22:55:14 -0000 Received: (qmail 11774 invoked from network); 13 Jun 2001 22:54:22 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 13 Jun 2001 22:54:22 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15AJRS-0003fU-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Jun 2001 23:48:50 +0100 X-MSMail-Priority: Normal Received: from jubilee.ns.sympatico.ca ([142.177.1.6] helo=mail-ns00s0.ns.sympatico.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15AJRR-0003fP-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 23:48:49 +0100 Received: from ns.sympatico.ca ([142.177.98.34]) by mail-ns00s0.ns.sympatico.ca (Post.Office MTA v3.5.3 release 223 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Wed, 13 Jun 2001 19:47:26 -0300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B2826D7.D750A857@ns.sympatico.ca> Date: Wed, 13 Jun 2001 22:52:08 -0400 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: SK6DK on 137.6 Thursday evening References: <000f01c0f455$251e15a0$f52897d4@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 Christer , What mode will they be transmitting? 73 de John VE1ZJ C Andersson wrote: > The radio club SK6DK will make some preparations for the coming 136 kHz transmissions from the SAQ site at Grimeton today (Thursday) June 14. They will use an "inv L" antenna with the vertical part 60 m high and the horizontal part 200 m (at 60 m height). The arrive at 16 UTC and will perhaps be QRV one or two hours later. Preliminary frequency is 137,6 kHz. Listener reports can be sent to sm6oew@telia.com . > A frame loop will be used for reception. > > 73 > sm6pxj /Christer From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16094 invoked from network); 13 Jun 2001 22:12:28 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 13 Jun 2001 22:12:28 -0000 Received: (qmail 17282 invoked from network); 13 Jun 2001 22:12:13 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 13 Jun 2001 22:12:13 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15AInl-0003Is-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Jun 2001 23:07:49 +0100 Received: from fep01.swip.net ([130.244.199.129] helo=fep01-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15AInj-0003In-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 23:07:48 +0100 Received: from W98 ([212.151.104.23]) by fep01-svc.swip.net with SMTP id <20010613220803.BVKY20762.fep01-svc.swip.net@W98> for ; Thu, 14 Jun 2001 00:08:03 +0200 Message-ID: <000f01c0f455$251e15a0$f52897d4@W98.swipnet.se> From: "C Andersson" To: "RSGB LF Group" Subject: LF: SK6DK on 137.6 Thursday evening Date: Thu, 14 Jun 2001 00:05:52 +0200 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: The radio club SK6DK will make some preparations for the coming 136 kHz transmissions from the SAQ site at Grimeton today (Thursday) June 14. They will use an "inv L" antenna with the vertical part 60 m high and the horizontal part 200 m (at 60 m height). The arrive at 16 UTC and will perhaps be QRV one or two hours later. Preliminary frequency is 137,6 kHz. Listener reports can be sent to sm6oew@telia.com . A frame loop will be used for reception. 73 sm6pxj /Christer From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8783 invoked from network); 13 Jun 2001 21:45:37 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 13 Jun 2001 21:45:37 -0000 Received: (qmail 23733 invoked from network); 13 Jun 2001 21:45:16 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 13 Jun 2001 21:45:16 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15AINI-00033j-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Jun 2001 22:40:28 +0100 Received: from gadolinium.btinternet.com ([194.73.73.111]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15AINE-00033e-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 22:40:24 +0100 Received: from [213.120.111.254] (helo=mud) by gadolinium.btinternet.com with smtp (Exim 3.22 #9) id 15AIMb-0000vA-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 22:39:45 +0100 Message-ID: <004001c0f452$0943ae60$fe6f78d5@btopenworld.com> From: "G3YXM" To: "LF Group" Subject: LF: driver chips and keying. Date: Wed, 13 Jun 2001 22:44:33 +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: Dear all. Beware of keying any but the TC4426 chip... The non-inverting TC4427 has its two outputs overlapping as the volts drop below 12, whereas the 4426 develops a dead band between the two outputs when the Volts are low. This aids soft(ish) keying. What a combined inverting / non-inverting chip would do would probably be a combination of both! High-level keying of the supply with another big mosfet is my preffered system these days, you can tailor the envelope any way you like. 73. Dave G3YXM. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28613 invoked from network); 13 Jun 2001 16:02:46 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 13 Jun 2001 16:02:46 -0000 Received: (qmail 17437 invoked from network); 13 Jun 2001 16:02:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 13 Jun 2001 16:02:23 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15ACyt-0000IP-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Jun 2001 16:54:55 +0100 X-MSMail-Priority: Normal Received: from jubilee.ns.sympatico.ca ([142.177.1.6] helo=mail-ns00s0.ns.sympatico.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15ACyq-0000IK-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 16:54:52 +0100 Received: from ns.sympatico.ca ([142.177.104.84]) by mail-ns00s0.ns.sympatico.ca (Post.Office MTA v3.5.3 release 223 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Wed, 13 Jun 2001 12:53:23 -0300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B274723.809D5E7@ns.sympatico.ca> Date: Wed, 13 Jun 2001 03:57:40 -0700 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: 73kHz beacon 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 Jim , Looked last night but saw nil . Will be there tonight. Last night the k index was a 3 73 de John VE1ZJ James Moritz wrote: > Dear LF Group, > > I will run the beacon again on 71.924kHz tonight, QRSS with 30s > dots, from about 0000 to 0300 utc again. > > Cheers, Jim Moritz > 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12820 invoked from network); 13 Jun 2001 14:44:37 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 13 Jun 2001 14:44:37 -0000 Received: (qmail 21986 invoked from network); 13 Jun 2001 14:44:14 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 13 Jun 2001 14:44:14 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15ABm9-00085Q-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Jun 2001 15:37:41 +0100 X-MSMail-Priority: Normal Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15ABm6-00085L-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 15:37:38 +0100 Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 15ABlT-0007da-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 15:36:59 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.232.252] (helo=mj9ar) by gemini.herts.ac.uk with smtp (Exim 3.22 #2) id 15ABlS-0007ZK-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 15:36:58 +0100 From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Wed, 13 Jun 2001 15:38:05 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: 73kHz beacon X-Mailer: Pegasus Mail for Win32 (v3.11) Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF Group, I will run the beacon again on 71.924kHz tonight, QRSS with 30s dots, from about 0000 to 0300 utc again. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1926 invoked from network); 13 Jun 2001 11:26:44 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 13 Jun 2001 11:26:44 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 12677 invoked from network); 13 Jun 2001 11:26:21 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 13 Jun 2001 11:26:21 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15A8ib-0006bf-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Jun 2001 12:21:49 +0100 Received: from finch-post-11.mail.demon.net ([194.217.242.39]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15A8iV-0006bR-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 12:21:43 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from telemetry.demon.co.uk ([194.222.19.114]) by finch-post-11.mail.demon.net with smtp (Exim 2.12 #1) id 15A8hr-000Mkg-0B for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 11:21:03 +0000 Message-ID: Date: Wed, 13 Jun 2001 10:58:59 +0100 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: Re: LF: RE: 73kHz tests tonight In-reply-to: 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 , James Moritz writes >Only real problem so far was getting the gate driver to work - even >with both sections of a TC4427 driver IC in parallel, the drive >waveform had rather slow edges when feeding the 4 large- >geometry FETs in parallel, so I ended up adding a "booster" with a >complementary pair of discrete MOSFETs in a circuit adapted from >one of IR's application notes. The driver transformer now seems to >be the limiting factor, but is OK for the time being. > Jim, Andy and group My 136KHz full bridge PA uses one section of a TC4426 ac coupled to a quintifilar (?) wound driver transformer and, like yours, the waveform is rather rounded. My theory is that is not such a bad thing because it provides some switch-on delay which prevents all 4 PA FETS being on together. I did try a single FET driver per Decca which took a lot of supply current and although the drive waveform was better, the PA appeared to be showing some instability tendency. 73, Tom From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7595 invoked from network); 13 Jun 2001 11:26:41 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 13 Jun 2001 11:26:41 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 12710 invoked from network); 13 Jun 2001 11:26:24 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 13 Jun 2001 11:26:24 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15A8ib-0006bg-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Jun 2001 12:21:49 +0100 Received: from finch-post-12.mail.demon.net ([194.217.242.41]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15A8ia-0006bT-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 12:21:48 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from telemetry.demon.co.uk ([194.222.19.114]) by finch-post-12.mail.demon.net with smtp (Exim 2.12 #1) id 15A8hr-0007wN-0C for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 11:21:04 +0000 Message-ID: Date: Wed, 13 Jun 2001 11:16:45 +0100 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: Re: LF: Loran In-reply-to: <000801c0f341$50067c40$255501d5@dave> 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 <000801c0f341$50067c40$255501d5@dave>, Dave Sergeant writes >>From Dave G3YMC > >Some of you might have noticed that Loran, at least the Lessay transmitter, was >off Yes Dave, I could not believe how strong both Bill G6NB and Bernard G8TB sounded. I did not realise that Loran was missing until I was in QSO with Bill and then it came back on and Bob G8RW was down in it again. It has certainly made me realise what a racket I get from Loran down in the South-West. I must get on and build a receiving loop! 73, Tom G3OLB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2449 invoked from network); 13 Jun 2001 11:11:16 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 13 Jun 2001 11:11:16 -0000 Received: (qmail 22425 invoked from network); 13 Jun 2001 11:10:55 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 13 Jun 2001 11:10:55 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15A8NY-0006Rw-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Jun 2001 12:00:04 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15A8NX-0006Rr-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 12:00:04 +0100 Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 15A8Mu-0001rB-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 11:59:24 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.232.252] (helo=mj9ar) by gemini.herts.ac.uk with smtp (Exim 3.22 #2) id 15A8Mu-0004X0-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 11:59:24 +0100 From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Wed, 13 Jun 2001 12:00:30 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: Re:73kHz TX In-reply-to: <7D653C9C42F5D411A27C00508BF8803D55C4CE@pdw-mail-r1.dstl.gov.uk> X-Mailer: Pegasus Mail for Win32 (v3.11) Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear Andy, David, Petr, Rik, LF Group, The static gate capacitance of each STW34NB20 is over 2000pF, and to switch 4 devices in a small fraction of a microsecond requires several amps peak, which is quite a tall order for most gate driver chips. There are some very powerful driver ICs around, but I did not have any to hand at the time. The discrete booster uses a TC4427 with the addition of 2 small MOSFETs, 2 diodes and a resistor. It is probably not optimised yet , but is simple and does the job. The present limiting factor is the driver transformer leakage inductance, which limits the rise time at the output MOSFET gates, and causes some ringing also. I expect it would be possible to apply G3YXM's keying method, but this would increase the stress on the output devices, and I have not tried to evaluate the effect this might have - since I already had a modulator, it was not required. The TX is very much (almost literally!) in the breadboard phase at the moment, and I will be trying some different ideas with it in the near future, hopefully. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16248 invoked from network); 13 Jun 2001 11:00:37 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 13 Jun 2001 11:00:37 -0000 Received: (qmail 10928 invoked from network); 13 Jun 2001 11:00:21 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 13 Jun 2001 11:00:21 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15A8Iv-0006L3-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Jun 2001 11:55:17 +0100 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15A8Il-0006Kx-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 11:55:08 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id LAA28863; Wed, 13 Jun 2001 11:59:14 +0100 (BST) Received: (qmail 28322 invoked from network); 13 Jun 2001 11:47:47 -0000 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 13 Jun 2001 11:47:47 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: by gauntlet.mail.dera.gov.uk; id LAA16839; Wed, 13 Jun 2001 11:39:23 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma016489; Wed, 13 Jun 01 11:38:17 GMT Received: from mailex.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with SMTP id for ; Wed, 13 Jun 2001 11:53:09 +0100 Received: (qmail 29232 invoked from network); 13 Jun 2001 10:34:44 +0100 Received: from softdnserror (HELO cchecker.dstl.gov.uk) (192.168.248.52) by mailex.dstl.gov.uk with SMTP; 13 Jun 2001 09:34:44 -0000 Received: from FRN-MAIL-R1.dstl.gov.uk (unverified) by cchecker.dstl.gov.uk (Content Technologies SMTPRS 4.1.2) with ESMTP id for ; Wed, 13 Jun 2001 10:35:10 +0100 Received: by frn-mail-r1.dstl.gov.uk with Internet Mail Service (5.5.2650.21) id ; Wed, 13 Jun 2001 11:43:39 +0100 Message-ID: <7D653C9C42F5D411A27C00508BF8803D55C4D3@pdw-mail-r1.dstl.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: Tx driver chips Date: Wed, 13 Jun 2001 11:43:43 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) 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: Instead of trying to control nanosecond long crossover problems and skew in driver chip propagation times, why not employ the Decca Tx approach of a small value (damped) inductor between the top and bottom power devices to 'soak up' the high current short pulses. It certainly works in my direct from mains Tx. Andy G4JNT > -----Original Message----- > From: Rik Strobbe [mailto:rik.strobbe@fys.kuleuven.ac.be] > Sent: 2001-06-13 12:01 > To: rsgb_lf_group@blacksheep.org > Subject: Re: LF: RE: 73kHz tests tonight > > > At 10:25 13/06/01 +0200, you wrote: > >Could TC4428 be keyed in G3YXM design? If so, it would > simplify the whole > >schematic. > > > >Petr, 'FIG > > Petr, > > That idea crossed my mind 2 years ago when building my TX > (variation on the > YXM design). But due to different delay times in the inverting and > non-inverting drivers (I measured abt. 25ns difference) I > didn't use the > 4428 it. > If you don't wan't to use a flip-flop to get the > counter-phase signals you > can use a couple of CMOS XOR gates, with a CD4077 running on > 15V I measured > less than 3ns difference between the inverting and non inverting gate. > > 73, Rik ON7YD > -- 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 3818 invoked from network); 13 Jun 2001 10:13:53 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 13 Jun 2001 10:13:53 -0000 Received: (qmail 8364 invoked from network); 13 Jun 2001 10:13:32 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 13 Jun 2001 10:13:32 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15A7SG-0005x5-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Jun 2001 11:00:52 +0100 X-MSMail-Priority: Normal Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15A7SA-0005x0-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 11:00:47 +0100 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 MAA895184 for ; Wed, 13 Jun 2001 12:00:03 +0200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3.0.1.16.20010613110032.2c87bde2@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 Jun 2001 11:00:32 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: RE: 73kHz tests tonight In-reply-to: <01aa01c0f3e2$60226840$1601a8c0@maly.cz.gmc.net> References: <7D653C9C42F5D411A27C00508BF8803D55C4CE@pdw-mail-r1.dstl.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: At 10:25 13/06/01 +0200, you wrote: >Could TC4428 be keyed in G3YXM design? If so, it would simplify the whole >schematic. > >Petr, 'FIG Petr, That idea crossed my mind 2 years ago when building my TX (variation on the YXM design). But due to different delay times in the inverting and non-inverting drivers (I measured abt. 25ns difference) I didn't use the 4428 it. If you don't wan't to use a flip-flop to get the counter-phase signals you can use a couple of CMOS XOR gates, with a CD4077 running on 15V I measured less than 3ns difference between the inverting and non inverting gate. 73, Rik ON7YD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7387 invoked from network); 13 Jun 2001 09:22:08 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 13 Jun 2001 09:22:08 -0000 Received: (qmail 29385 invoked from network); 13 Jun 2001 09:21:18 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 13 Jun 2001 09:21:18 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15A6ks-0005a9-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Jun 2001 10:16:02 +0100 Received: from imo-m04.mx.aol.com ([64.12.136.7]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15A6ko-0005Zm-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 10:15:59 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from G0MRF@aol.com by imo-m04.mx.aol.com (mail_out_v30.22.) id l.fe.7b06691 (4247) for ; Wed, 13 Jun 2001 05:14:50 -0400 (EDT) From: G0MRF@aol.com Message-ID: Date: Wed, 13 Jun 2001 05:14:50 EDT Subject: Re: LF: RE: 73kHz tests tonight 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 107 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In a message dated 6/13/01 8:49:55 AM GMT Daylight Time, ACTALBOT@dera.gov.uk writes: << One option would be to use the TC4428 driver chip. This has one inverting and one non inverting driver. Drive both inputs in parallel and connect the FET driver transformer primary, now with twice as many turns, between both outputs. That way you can double the drive capability without running into the problems with the unequal switching times that can give trouble when trying to parallel up two devices with totem pole outputs Andy G4JNT >> Just a thought.... The 4428 has different propagation delay times in each section due to its 'non-symetrical design. Although this may be minor I could see the difference on a fast scope and it did affect the switching in a 1500kHz transmitter I was working on. It may not be important at 73k, but it's worth remembering. I recall using 2 TC4429 chips which I seem to remember are single high current inverters. 73 David 'MRF From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7188 invoked from network); 13 Jun 2001 09:22:01 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 13 Jun 2001 09:22:01 -0000 Received: (qmail 18105 invoked from network); 13 Jun 2001 09:21:09 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 13 Jun 2001 09:21:09 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15A6lA-0005aF-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Jun 2001 10:16:20 +0100 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 #2) id 15A6l9-0005Zr-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 10:16:19 +0100 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 KAA185462 for ; Wed, 13 Jun 2001 10:06:01 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (dyn9-87-105-152.italy.ibm.com [9.87.105.152]) by d06relay01.portsmouth.uk.ibm.com (8.11.1m3/NCO v4.96) with ESMTP id f5D9ELr187910 for ; Wed, 13 Jun 2001 10:14:24 +0100 Message-ID: <3B272EFD.8DB45EFC@usa.net> Date: Wed, 13 Jun 2001 11:14:37 +0200 From: "Alberto di Bene" 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: Kenwood, Toriods 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: DL4YHF@aol.com wrote: > Hi Alberto, > > didn't you tell them about the label on the back side of the 950 which says > > "Caution ! A LOT OF user serviceable parts inside ..." ? > :-) > > 73's Wolf Wolf, the day I will arrive to a complete understanding of the Japanese mindset, I will be ready for a 'honoris causa' Universitary Degree on Applied Psychology... :-) 73 Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9099 invoked from network); 13 Jun 2001 08:38:58 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 13 Jun 2001 08:38:58 -0000 Received: (qmail 4742 invoked from network); 13 Jun 2001 08:38:41 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 13 Jun 2001 08:38:41 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15A61o-0005Cj-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Jun 2001 09:29:28 +0100 Received: from smtp.im.cz ([195.39.10.4] helo=email.seznam.cz) by post.thorcom.com with smtp (Exim 3.16 #2) id 15A61P-0005Cc-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 09:29:04 +0100 Received: (qmail 12516 invoked from network); 13 Jun 2001 08:27:43 -0000 Received: from unknown (HELO p) (195.47.69.2) by smtp.im.cz with SMTP; 13 Jun 2001 08:27:43 -0000 Message-ID: <01aa01c0f3e2$60226840$1601a8c0@maly.cz.gmc.net> From: "Petr Maly \(Seznam\)" To: rsgb_lf_group@blacksheep.org References: <7D653C9C42F5D411A27C00508BF8803D55C4CE@pdw-mail-r1.dstl.gov.uk> Subject: Re: LF: RE: 73kHz tests tonight Date: Wed, 13 Jun 2001 10:25:16 +0200 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: Could TC4428 be keyed in G3YXM design? If so, it would simplify the whole schematic. Petr, 'FIG ----- Original Message ----- From: Talbot Andrew To: Sent: Wednesday, June 13, 2001 9:43 AM Subject: RE: LF: RE: 73kHz tests tonight > One option would be to use the TC4428 driver chip. This has one inverting > and one non inverting driver. Drive both inputs in parallel and connect > the FET driver transformer primary, now with twice as many turns, between > both outputs. That way you can double the drive capability without running > into the problems with the unequal switching times that can give trouble > when trying to parallel up two devices with totem pole outputs > > Andy G4JNT > > > > -----Original Message----- > > From: James Moritz [mailto:j.r.moritz@herts.ac.uk] > > Only real problem so far was getting the gate driver to work - even > > with both sections of a TC4427 driver IC in parallel, the drive > > waveform had rather slow edges when feeding the 4 large- > > geometry FETs in parallel, > > > > > -- > 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 9505 invoked from network); 13 Jun 2001 07:51:19 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 13 Jun 2001 07:51:19 -0000 Received: (qmail 12937 invoked from network); 13 Jun 2001 07:51:02 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 13 Jun 2001 07:51:02 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15A5L4-0004p8-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Jun 2001 08:45:18 +0100 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15A5L3-0004p3-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 08:45:17 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id IAA25195; Wed, 13 Jun 2001 08:49:26 +0100 (BST) Received: (qmail 27884 invoked from network); 13 Jun 2001 08:37:59 -0000 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 13 Jun 2001 08:37:59 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: by gauntlet.mail.dera.gov.uk; id IAA06831; Wed, 13 Jun 2001 08:29:38 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma006768; Wed, 13 Jun 01 08:29:15 GMT Received: from mailex.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with SMTP id for ; Wed, 13 Jun 2001 08:53:07 +0100 Received: (qmail 15966 invoked from network); 13 Jun 2001 07:34:43 +0100 Received: from softdnserror (HELO cchecker.dstl.gov.uk) (192.168.248.52) by mailex.dstl.gov.uk with SMTP; 13 Jun 2001 06:34:43 -0000 Received: from FRN-MAIL-R1.dstl.gov.uk (unverified) by cchecker.dstl.gov.uk (Content Technologies SMTPRS 4.1.2) with ESMTP id for ; Wed, 13 Jun 2001 07:35:10 +0100 Received: by frn-mail-r1.dstl.gov.uk with Internet Mail Service (5.5.2650.21) id ; Wed, 13 Jun 2001 08:43:39 +0100 Message-ID: <7D653C9C42F5D411A27C00508BF8803D55C4CE@pdw-mail-r1.dstl.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: RE: LF: RE: 73kHz tests tonight Date: Wed, 13 Jun 2001 08:43:43 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) 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: One option would be to use the TC4428 driver chip. This has one inverting and one non inverting driver. Drive both inputs in parallel and connect the FET driver transformer primary, now with twice as many turns, between both outputs. That way you can double the drive capability without running into the problems with the unequal switching times that can give trouble when trying to parallel up two devices with totem pole outputs Andy G4JNT > -----Original Message----- > From: James Moritz [mailto:j.r.moritz@herts.ac.uk] > Only real problem so far was getting the gate driver to work - even > with both sections of a TC4427 driver IC in parallel, the drive > waveform had rather slow edges when feeding the 4 large- > geometry FETs in parallel, > -- 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 5869 invoked from network); 13 Jun 2001 05:47:08 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 13 Jun 2001 05:47:08 -0000 Received: (qmail 3024 invoked from network); 13 Jun 2001 05:46:46 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 13 Jun 2001 05:46:46 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15A3OS-0003m0-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Jun 2001 06:40:40 +0100 Received: from tungsten.btinternet.com ([194.73.73.81]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15A3OR-0003lv-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Jun 2001 06:40:39 +0100 Received: from [213.1.85.37] (helo=dave) by gadolinium.btinternet.com with smtp (Exim 3.03 #83) id 159nvh-0003Q4-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Jun 2001 14:09:58 +0100 Message-ID: <000801c0f341$50067c40$255501d5@dave> From: "Dave Sergeant" To: "rsgb_lf_group" Subject: LF: Loran Date: Tue, 12 Jun 2001 14:09:23 +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: >From Dave G3YMC Some of you might have noticed that Loran, at least the Lessay transmitter, was off the air for several hours this morning June 12th. I am not sure when exactly it went off, but became aware that my S meter was sitting at zero instead of its usual s5 or so and I could hear various weak TV burbles I had never heard before. A quick tune to 100kHz confirmed it was missing.This has happened before, but in that case only for a few seconds. Now we know exactly how much QRM Lessay is causing us. I heard Tom G3OLB in QSO with a couple of stations, but a mini pile up formed on him so I didn't have chance to call him. The stations I heard were beautifully crisp and clear without the usual rattle - I then had to go out on a business call and when I came back at midday (1100z) I found that Loran had resurfaced and status quo returned. This could have been an ideal opportunity for me to work Tom, as he does not normally copy me as he is in the null of my loop. It would also have been an excellent opportunity for GW4ALG to have some qsos on his 5W QRP rig (I can only detect traces of Steve's 5W when Loran is on). It would be nice to have advance notice of these outages of Loran so we can take advantage of them, perhaps that would be asking too much!! Cheers Dave G3YMC dsergeant@iee.org dsergeant@connectfree.co.uk http://www.dsergeant.btinternet.co.uk From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10235 invoked from network); 12 Jun 2001 16:20:55 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 12 Jun 2001 16:20:55 -0000 Received: (qmail 11077 invoked from network); 12 Jun 2001 16:20:33 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 12 Jun 2001 16:20:33 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159qow-0005jA-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Jun 2001 17:15:10 +0100 X-MSMail-Priority: Normal Received: from jubilee.ns.sympatico.ca ([142.177.1.6] helo=mail-ns00s0.ns.sympatico.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 159qou-0005j5-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Jun 2001 17:15:09 +0100 Received: from ns.sympatico.ca ([142.177.91.113]) by mail-ns00s0.ns.sympatico.ca (Post.Office MTA v3.5.3 release 223 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Tue, 12 Jun 2001 13:13:40 -0300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B25FA62.790ACC61@ns.sympatico.ca> Date: Tue, 12 Jun 2001 04:17:55 -0700 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: 73kHz tests tonight 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 Jim , What time tonight? I'll be looking for you. 73 de Jpon VE1ZJ James Moritz wrote: > Dear LF Group, > > I got my new 73kHz TX running with suprisingly few problems (so > far...), so will try running a beacon signal tonight on 71.924kHz, 30s > dot QRSS, starting around 0000utc for a few hours. > > TX power is about 1kW, giving 3A antenna current last night. I > calculate an ERP of 220mW, so probably a few dB down on this in > reality. > > Any reports or suggestions would be very welcome. > > Cheers, Jim Moritz > 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2863 invoked from network); 12 Jun 2001 16:12:48 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 12 Jun 2001 16:12:48 -0000 Received: (qmail 8876 invoked from network); 12 Jun 2001 16:12:30 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 12 Jun 2001 16:12:30 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159qfb-0005c3-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Jun 2001 17:05:31 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from imo-m06.mx.aol.com ([64.12.136.161]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 159qfa-0005bw-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Jun 2001 17:05:30 +0100 Received: from DL4YHF@aol.com by imo-m06.mx.aol.com (mail_out_v30.22.) id l.d7.7b77ce2 (3851) for ; Tue, 12 Jun 2001 12:04:14 -0400 (EDT) From: DL4YHF@aol.com Message-ID: Date: Tue, 12 Jun 2001 12:04:14 EDT Subject: LF: Re: Kenwood, Toriods To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Mailer: AOL 6.0 for Windows DE sub 217 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit Hi Alberto,

didn't you tell them about the label on the back side of the 950 which says

 "Caution !  A LOT OF user serviceable parts inside ..." ?
:-)
 
73's Wolf From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14724 invoked from network); 12 Jun 2001 15:50:12 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 12 Jun 2001 15:50:12 -0000 Received: (qmail 21338 invoked from network); 12 Jun 2001 15:49:55 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 12 Jun 2001 15:49:55 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159qKY-0005T5-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Jun 2001 16:43:46 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 159qKX-0005T0-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Jun 2001 16:43:45 +0100 Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 159qJs-0007Og-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Jun 2001 16:43:04 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.232.252] (helo=mj9ar) by gemini.herts.ac.uk with smtp (Exim 3.22 #2) id 159qJq-0006Ar-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Jun 2001 16:43:02 +0100 From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Tue, 12 Jun 2001 16:44:07 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: RE: 73kHz tests tonight In-reply-to: <7D653C9C42F5D411A27C00508BF8803D55C4CB@pdw-mail-r1.dstl.gov.uk> X-Mailer: Pegasus Mail for Win32 (v3.11) Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear Andy, LF group, >What sort of TX is it? It uses the Decca circuit configuration, together with my existing 60V PSU and modulator. It uses a single PA rather than 3 in parallel, so the circuit is re-designed for about 2.5 times as much current. It has 4 x STW34NB20 MOSFETs. Only real problem so far was getting the gate driver to work - even with both sections of a TC4427 driver IC in parallel, the drive waveform had rather slow edges when feeding the 4 large- geometry FETs in parallel, so I ended up adding a "booster" with a complementary pair of discrete MOSFETs in a circuit adapted from one of IR's application notes. The driver transformer now seems to be the limiting factor, but is OK for the time being. Efficiency seems to be around 90%, as we have come to expect. The "guard" circuit seems to do it's job. Once I am sure the circuit has a reasonable life expectancy I will post some more details. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 175 invoked from network); 12 Jun 2001 14:15:13 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 12 Jun 2001 14:15:13 -0000 Received: (qmail 24684 invoked from network); 12 Jun 2001 14:14:54 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 12 Jun 2001 14:14:54 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159oqa-0004dS-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Jun 2001 15:08:44 +0100 Received: from ns3.swh.sk ([192.108.125.37]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 159oqX-0004dM-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Jun 2001 15:08:42 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from hermes.swh.sk (hermes [192.108.125.60]) by ns3.swh.sk (8.11.0/8.11.0) with ESMTP id f5CEEcS18802 for ; Tue, 12 Jun 2001 16:14:38 +0200 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 QAA18763 for ; Tue, 12 Jun 2001 16:07:55 +0200 (MET DST) Received: by btss.swh.sk with Internet Mail Service (5.5.2653.19) id ; Tue, 12 Jun 2001 16:07:53 +0200 Message-ID: <29BDD4F529FCD311B631009027357C4E02258760@btss103a.swh.sk> From: "Gasparik Richard" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: 73kHz tests tonight Date: Tue, 12 Jun 2001 16:07:44 +0200 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset=iso-8859-2; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: That's nice...I'll run Argo during the night too...good luck Jim... 73 de Rich OM2TW -----Original Message----- From: James Moritz [mailto:j.r.moritz@herts.ac.uk] Sent: Tuesday, June 12, 2001 3:57 PM To: rsgb_lf_group@blacksheep.org Subject: LF: 73kHz tests tonight Dear LF Group, I got my new 73kHz TX running with suprisingly few problems (so far...), so will try running a beacon signal tonight on 71.924kHz, 30s dot QRSS, starting around 0000utc for a few hours. TX power is about 1kW, giving 3A antenna current last night. I calculate an ERP of 220mW, so probably a few dB down on this in reality. Any reports or suggestions would be very welcome. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16346 invoked from network); 12 Jun 2001 13:40:27 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 12 Jun 2001 13:40:27 -0000 Received: (qmail 20852 invoked from network); 12 Jun 2001 13:39:39 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 12 Jun 2001 13:39:39 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159oJ6-0004MH-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Jun 2001 14:34:08 +0100 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 159oJ3-0004MC-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Jun 2001 14:34:07 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id OAA21155; Tue, 12 Jun 2001 14:38:10 +0100 (BST) Received: (qmail 7888 invoked from network); 12 Jun 2001 14:26:46 -0000 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 12 Jun 2001 14:26:45 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: by gauntlet.mail.dera.gov.uk; id OAA02004; Tue, 12 Jun 2001 14:18:27 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma001861; Tue, 12 Jun 01 14:17:30 GMT Received: from mailex.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with SMTP id for ; Tue, 12 Jun 2001 14:41:22 +0100 Received: (qmail 10888 invoked from network); 12 Jun 2001 13:23:01 +0100 Received: from softdnserror (HELO cchecker.dstl.gov.uk) (192.168.248.52) by mailex.dstl.gov.uk with SMTP; 12 Jun 2001 12:23:01 -0000 Received: from FRN-MAIL-R1.dstl.gov.uk (unverified) by cchecker.dstl.gov.uk (Content Technologies SMTPRS 4.1.2) with ESMTP id for ; Tue, 12 Jun 2001 13:23:28 +0100 Received: by frn-mail-r1.dstl.gov.uk with Internet Mail Service (5.5.2650.21) id ; Tue, 12 Jun 2001 14:31:57 +0100 Message-ID: <7D653C9C42F5D411A27C00508BF8803D55C4CB@pdw-mail-r1.dstl.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: 73kHz tests tonight Date: Tue, 12 Jun 2001 14:32:00 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) 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 sort of Tx is it ? Andy 'JNT > -----Original Message----- > From: James Moritz [mailto:j.r.moritz@herts.ac.uk] > Sent: 2001-06-12 14:57 > To: rsgb_lf_group@blacksheep.org > Subject: LF: 73kHz tests tonight > > > Dear LF Group, > > I got my new 73kHz TX running with suprisingly few problems (so > far...), so will try running a beacon signal tonight on > 71.924kHz, 30s > dot QRSS, starting around 0000utc for a few hours. > > TX power is about 1kW, giving 3A antenna current last night. I > calculate an ERP of 220mW, so probably a few dB down on this in > reality. > > Any reports or suggestions would be very welcome. > > 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 5088 invoked from network); 12 Jun 2001 13:03:42 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 12 Jun 2001 13:03:42 -0000 Received: (qmail 24184 invoked from network); 12 Jun 2001 13:02:52 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 12 Jun 2001 13:02:52 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159nih-0003zp-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Jun 2001 13:56:31 +0100 X-MSMail-Priority: Normal Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 159nif-0003zh-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Jun 2001 13:56:30 +0100 Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 159nhv-0001x8-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Jun 2001 13:55:43 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.232.252] (helo=mj9ar) by gemini.herts.ac.uk with smtp (Exim 3.22 #2) id 159nht-0003e1-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Jun 2001 13:55:41 +0100 From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Tue, 12 Jun 2001 13:56:46 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: 73kHz tests tonight X-Mailer: Pegasus Mail for Win32 (v3.11) Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear LF Group, I got my new 73kHz TX running with suprisingly few problems (so far...), so will try running a beacon signal tonight on 71.924kHz, 30s dot QRSS, starting around 0000utc for a few hours. TX power is about 1kW, giving 3A antenna current last night. I calculate an ERP of 220mW, so probably a few dB down on this in reality. Any reports or suggestions would be very welcome. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8115 invoked from network); 12 Jun 2001 09:27:10 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 12 Jun 2001 09:27:10 -0000 Received: (qmail 6460 invoked from network); 12 Jun 2001 09:26:18 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 12 Jun 2001 09:26:18 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159kII-0002Fm-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Jun 2001 10:17:02 +0100 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 #2) id 159kIF-0002Fd-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Jun 2001 10:16:59 +0100 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 KAA75236; Tue, 12 Jun 2001 10:04:30 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (dyn9-87-105-152.italy.ibm.com [9.87.105.152]) by d06relay02.portsmouth.uk.ibm.com (8.11.1m3/NCO v4.96) with ESMTP id f5C9D5A32802; Tue, 12 Jun 2001 10:13:06 +0100 Message-ID: <3B25DD04.EB3CBE15@usa.net> Date: Tue, 12 Jun 2001 11:12:36 +0200 From: "Alberto di Bene" X-Mailer: Mozilla 4.76 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org, lowfer@qth.net Subject: LF: Re: [TECH] Help needed on toroid trasf. construction References: <00c501c0ef45$d61a3ec0$5774ccd4@194.95.193.10.fen.baynet.de> <3B24ACC6.80671DF0@usa.net> <159S6y-1U6YeuC@fwd03.sul.t-online.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: Thanks to you all for the many answers received on the subject, both on the reflectors and via private messages. I answered directly to those who kindly offered to be of help in building/providing such transformer. It is really reassuring to see that the ham spirit is still alive, now with the powerful support given by the Internet. I contacted directly also the technical office of Kenwood Japan, but their answer has been what was to be expected by such a giant organization. I report it here following : --------- ------------ Dear Sir, Thank you for your e-mail. Regarding your inquiry, as you indicated, receiving sensitivity of TS-950SDX in the low frequency band is inferior to the one of TS-850. Regrettably, however, this receiving sensitivity cannot be modified or improved by the change of parts, etc. We are obliged to ask you to use the model as they are. We are sorry that we cannot meet your requirement. Sincerely, (Tokyo, Japan) -------------------------- Customer Service Section Kenwood Corporation css@kenwood.co.jp ------------------- ----------------------- Well, despite what they say, I am still deliberate in willing to do such modification. I will report the outcomes on the reflectors, for those interested. Thanks again to all 73 Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12980 invoked from network); 11 Jun 2001 22:52:22 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 11 Jun 2001 22:52:22 -0000 Received: (qmail 29408 invoked from network); 11 Jun 2001 22:51:33 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 11 Jun 2001 22:51:33 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159aT1-0005nE-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Jun 2001 23:47:27 +0100 Received: from imo-r05.mx.aol.com ([152.163.225.101]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 159aT0-0005n9-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Jun 2001 23:47:26 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from G0MRF@aol.com by imo-r05.mx.aol.com (mail_out_v30.22.) id l.2f.16559438 (7878) for ; Mon, 11 Jun 2001 18:46:41 -0400 (EDT) From: G0MRF@aol.com Message-ID: <2f.16559438.2856a451@aol.com> Date: Mon, 11 Jun 2001 18:46:41 EDT Subject: Re: LF: Need 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 107 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In a message dated 6/11/01 7:54:51 PM GMT Daylight Time, gii3kev@netscapeonline.co.uk writes: << Thanks David for your help. It might be better sent via ordinary mail. I owe you a pint when I see you at Donnington later on in the year. Address 2 Wordsworth Close, Scalby, Scarborough, YO13 OSN Thanks again de Mal/G3KEV >> OK No problem Mal. I'm out all day tomorrow but will post first thing Wednesday. Only other choice is to fax it if you have one. If I don't hear from you I'll go ahead with 'plan A' and post a copy Wednesday AM. Thanks for the address. The amp seems to work fine, mine has been operational since '85 ! 73 David. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8447 invoked from network); 11 Jun 2001 21:14:45 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 11 Jun 2001 21:14:45 -0000 Received: (qmail 4281 invoked from network); 11 Jun 2001 21:14:22 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 11 Jun 2001 21:14:22 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159Yrq-0004z3-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Jun 2001 22:04:58 +0100 X-MSMail-Priority: Normal Received: from finch-post-11.mail.demon.net ([194.217.242.39]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 159Yrp-0004yy-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Jun 2001 22:04:57 +0100 Received: from alg.demon.co.uk ([194.222.171.80]) by finch-post-11.mail.demon.net with esmtp (Exim 2.12 #1) id 159YrC-000HjJ-0B for rsgb_lf_group@blacksheep.org; Mon, 11 Jun 2001 21:04:19 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B253372.E744092F@alg.demon.co.uk> Date: Mon, 11 Jun 2001 22:09:06 +0100 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: Re: LF: 136kHz QRP Well done Steve References: <001001c0ec75$ace08d20$f446073e@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 G3NYK wrote: > > Hi Steve, I nearly ripped my rx apart when I heard a station working you, > and I could not hear you!! I ALWAYS copy you on the speaker, no matter > which aerial you are running.....normally. That is a very creditable list > of distances worked for 5 watts output. That should act as stimulator to > those who want to try the band. Also, it provides a very good bit of aerial > testing gear, because the secret is all in the aerial. Thanks, Alan. Yes, the little TX is good for testing antennas - as well as testing the patience of other operators! Another operator to copy my low power signal this past weekend was John G4CNN. John did a great job of pulling in my QRP signal to give me my furthest QRP QSO so far - at a distance of 122 km. I was running 5 watts RF to my 12 m vertical. Some details of my QRP TX can be found at: http://www.alg.demon.co.uk/radio/136/qrptx.htm Regards to all, Steve GW4ALG From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8368 invoked from network); 11 Jun 2001 18:57:11 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 11 Jun 2001 18:57:11 -0000 Received: (qmail 3749 invoked from network); 11 Jun 2001 18:56:53 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 11 Jun 2001 18:56:53 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159WkH-0003vE-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Jun 2001 19:49:01 +0100 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 #2) id 159WkD-0003v9-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Jun 2001 19:48:58 +0100 Received: from ldsas20-84-135-38.cw-visp.com ([212.137.135.38] helo=netscapeonline.co.uk) by mailhost.netscapeonline.co.uk with esmtp (Exim 3.02 #1) id 159Wd4-0003VP-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Jun 2001 18:41:35 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B2503C8.16215266@netscapeonline.co.uk> Date: Mon, 11 Jun 2001 18:45:44 +0100 From: "gii3kev" Organization: Netscape Online member X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win95; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Need References: <78.160f8462.2855d913@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: G0MRF@aol.com wrote: > In a message dated 6/9/01 3:42:14 PM GMT Daylight Time, > gii3kev@netscapeonline.co.uk writes: > > << Hi All > Sorry not LF. > Does anyone have a cct diagram of a Microwave Modules 2m 100w lin amp > type > MML 144/100-S. > >> > > Yes, I have that circuit diagram. (with a SRF1397 as the amplifer?) > Would you like a photocopy sent and if so where, or a very large image file > sent to your e-mail address? > > 73 > > David G0MRF Thanks David for your help. It might be better sent via ordinary mail. I owe you a pint when I see you at Donnington later on in the year. Address 2 Wordsworth Close, Scalby, Scarborough, YO13 OSN Thanks again de Mal/G3KEV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2456 invoked from network); 11 Jun 2001 14:15:50 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 11 Jun 2001 14:15:50 -0000 Received: (qmail 19637 invoked from network); 11 Jun 2001 14:15:24 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 11 Jun 2001 14:15:24 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159SMI-0001Z6-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Jun 2001 15:07:58 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from maynard.mail.mindspring.net ([207.69.200.243]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 159SMG-0001Yx-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Jun 2001 15:07:56 +0100 Received: from Larsen.mindspring.com (user-2ives59.dialup.mindspring.com [165.247.112.169]) by maynard.mail.mindspring.net (8.9.3/8.8.5) with ESMTP id KAA03807; Mon, 11 Jun 2001 10:07:03 -0400 (EDT) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <5.0.2.1.0.20010611095232.024bf7b0@pop.mindspring.com> X-Sender: fgentges@pop.mindspring.com X-Mailer: QUALCOMM Windows Eudora Version 5.0.2 Date: Mon, 11 Jun 2001 10:06:03 -0400 To: "Alberto di Bene" , rsgb_lf_group@blacksheep.org, lowfer@qth.net From: =?iso-8859-1?Q?Frank_Gentges_K=D8BRA?= Subject: LF: Re: [Lowfer] [TECH] Help needed on toroid trasf. construction In-reply-to: <3B24ACC6.80671DF0@usa.net> References: <00c501c0ef45$d61a3ec0$5774ccd4@194.95.193.10.fen.baynet.de> 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: Alberto, To wind such a transformer you can use the Amidon FT50-J core with an initial permeability of 5000. for a 10 kHz bottom end you will need about 17 turns for a 50 ohm source/load. For the other 4:1 side you will need 4 times that. With separate windings it will start dropping out at about 10 MHz. To extend it higher you will need to twist wires together for a 5-filar winding. The 4x winding is made up of 4 of those all connected in series. I use Radio Shack wire wrap wire here which is readily available. However, to get 17 turns of 5-filar wire wrap wire on that little core may be too hard. You may either go to smaller wire or a larger core such as an Amidon FT87-J core. In any event I will be glad to wind up such a beast and send it to you. Before I start, let me know which side is 50 ohms and is the other side 4x50 = 200 ohms or is the turns ratio 4:1? Or is the 4x side 50 ohms and the 1x side 12.5 ohms or 1/4 the number of turns? How much space is available? I wound a similar 1:1 replacement for the TenTec RX320 which made a real difference. Frank K0BRA At 01:34 PM 6/11/01 +0200, Alberto di Bene wrote: >Hi all, > I need some words of wisdom and a bit of help about the >construction of a small toroid transformer. > >First the antefact : I swapped recently my TS-850 for a TS-950SDX, >a very fine radio, but much less sensitive on the LF band than the TS-850. >Looking at the schematics, and doing some filter simulation with >Electronic Workbench, I think to have found the culprit, i.e. L3, a small >toroidal transfomer, with ratio 1:4, which is inserted in the signal path, >after the input attenuator, and before the filters bank. With all probability, >its response at 136kHz leaves much to be desired. The TS-850 doesn't >have any such transformer, the signal goes straight to the filters. > >So I have decided to replace it. Looking in the MiniCircuits catalog, I have >found what seems to be the ideal replacement, the T4-6T-KK81 model, which >has a -3dB response from 10kHz to 100MHz. Problem is that this transformer >is not carried in stock by the Italian distributor, and both they and the >MiniCircuits sales office have a minimum quantity amount for an order. > >At this point the only choice is to build it myself. And this is were your >help could >come in my rescue. I need to know what your experiences are in building >such a wideband kind of transformers. What is the best type of material, >caveats to not forget, optimal number of turns, you name it. > >TNX for any help, > >73 Alberto I2PHD > > >To unsubscribe, send to MAJORDOMO@qth.net "unsubscribe lowfer" (Do not >send to list!!) Send on list submissions to lowfer@qth.net Frank Gentges KØBRA fgentges@mindspring.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2488 invoked from network); 11 Jun 2001 13:58:23 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 11 Jun 2001 13:58:23 -0000 Received: (qmail 6037 invoked from network); 11 Jun 2001 13:57:58 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 11 Jun 2001 13:57:58 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159S7e-0001PT-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Jun 2001 14:52:50 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from mailout01.sul.t-online.com ([194.25.134.80] helo=mailout01.sul.t-online.de) by post.thorcom.com with esmtp (Exim 3.16 #2) id 159S7d-0001PO-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Jun 2001 14:52:50 +0100 Received: from fwd03.sul.t-online.de by mailout01.sul.t-online.de with smtp id 159S70-0001PQ-01; Mon, 11 Jun 2001 15:52:10 +0200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from (087321565-0001@[217.2.69.115]) by fwd03.sul.t-online.com with smtp id 159S6y-1U6YeuC; Mon, 11 Jun 2001 15:52:08 +0200 From: "Hans-Joachim Brandt" To: rsgb_lf_group@blacksheep.org References: <00c501c0ef45$d61a3ec0$5774ccd4@194.95.193.10.fen.baynet.de> <3B24ACC6.80671DF0@usa.net> Subject: Re: LF: [TECH] Help needed on toroid trasf. construction X-Mailer: T-Online eMail 2.34 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Date: Mon, 11 Jun 2001 15:52:08 +0200 Message-ID: <159S6y-1U6YeuC@fwd03.sul.t-online.com> X-Sender: 087321565-0001@t-dialin.net Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear Alberto, as long as it for receive only, I think the best way will be to use a toroid with a rather high AL value. About 30 years ago I had to design an rx input balun transformer for a military receiver for the frequency range 10 kHz to 3o MHz and have used SIEMENS N30 without any problems, employing the rule that the XL of the coils should be about 3-4 times the impedance to be transformed at the lowest frequency. In this application the balun has been wound with triple twisted enamelled wire on a SIEMENS B62152-A0007-X030 core. OK? 73 Ha-Jo, DJ1ZB Alberto di Bene schrieb: > Hi all, > I need some words of wisdom and a bit of help about the > construction of a small toroid transformer. > > First the antefact : I swapped recently my TS-850 for a TS-950SDX, > a very fine radio, but much less sensitive on the LF band than the TS-850. > Looking at the schematics, and doing some filter simulation with > Electronic Workbench, I think to have found the culprit, i.e. L3, a small > toroidal transfomer, with ratio 1:4, which is inserted in the signal path, > after the input attenuator, and before the filters bank. With all probability, > its response at 136kHz leaves much to be desired. The TS-850 doesn't > have any such transformer, the signal goes straight to the filters. > > So I have decided to replace it. Looking in the MiniCircuits catalog, I have > found what seems to be the ideal replacement, the T4-6T-KK81 model, which > has a -3dB response from 10kHz to 100MHz. Problem is that this transformer > is not carried in stock by the Italian distributor, and both they and the > MiniCircuits sales office have a minimum quantity amount for an order. > > At this point the only choice is to build it myself. And this is were your > help could > come in my rescue. I need to know what your experiences are in building > such a wideband kind of transformers. What is the best type of material, > caveats to not forget, optimal number of turns, you name it. > > TNX for any help, > > 73 Alberto I2PHD > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2449 invoked from network); 11 Jun 2001 13:55:35 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 11 Jun 2001 13:55:35 -0000 Received: (qmail 4097 invoked from network); 11 Jun 2001 13:54:47 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 11 Jun 2001 13:54:47 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159S4v-0001PE-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Jun 2001 14:50:01 +0100 X-MSMail-Priority: Normal Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 159S4t-0001Os-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Jun 2001 14:49:59 +0100 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 PAA1119856 for ; Mon, 11 Jun 2001 15:49:20 +0200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3.0.1.16.20010611144951.2c370646@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 Jun 2001 14:49:51 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: [TECH] Help needed on toroid trasf. construction In-reply-to: <3B24ACC6.80671DF0@usa.net> References: <00c501c0ef45$d61a3ec0$5774ccd4@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: Hello Alberto, If you have access to Amidon cores I would try a ferrite toroidal core with the #72 or #77 material. For wideband applications these materials are rated for 0.5 -30 MHz. From my experience the frequencies given by Amidon are 0.5dB or at worst 1dB points, so for -3dB the range might be something like 0.2 - 70MHz Below 200kHz loss will increase, but at these frequencies the noise level is so high that you won't notice the few dB extra. Besides the material it is the number of windings that determine how 'wideband' a transformer is, more windings will improve the LF behavior (at cost of extra loss at the HF end) and vice versa. Experiment with the number of windings. A final tip : use a rather large toriod. It will allow you to space the windings and thus reducing the inter-winding capacitance (that often limits the upper frequency). 73, Rik ON7YD At 13:34 11/06/01 +0200, you wrote: >Hi all, > I need some words of wisdom and a bit of help about the >construction of a small toroid transformer. > >First the antefact : I swapped recently my TS-850 for a TS-950SDX, >a very fine radio, but much less sensitive on the LF band than the TS-850. >Looking at the schematics, and doing some filter simulation with >Electronic Workbench, I think to have found the culprit, i.e. L3, a small >toroidal transfomer, with ratio 1:4, which is inserted in the signal path, >after the input attenuator, and before the filters bank. With all probability, >its response at 136kHz leaves much to be desired. The TS-850 doesn't >have any such transformer, the signal goes straight to the filters. > >So I have decided to replace it. Looking in the MiniCircuits catalog, I have >found what seems to be the ideal replacement, the T4-6T-KK81 model, which >has a -3dB response from 10kHz to 100MHz. Problem is that this transformer >is not carried in stock by the Italian distributor, and both they and the >MiniCircuits sales office have a minimum quantity amount for an order. > >At this point the only choice is to build it myself. And this is were your help could >come in my rescue. I need to know what your experiences are in building >such a wideband kind of transformers. What is the best type of material, >caveats to not forget, optimal number of turns, you name it. > >TNX for any help, > >73 Alberto I2PHD > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5661 invoked from network); 11 Jun 2001 12:28:31 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 11 Jun 2001 12:28:31 -0000 Received: (qmail 25676 invoked from network); 11 Jun 2001 12:28:09 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 11 Jun 2001 12:28:09 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159QPJ-0000Us-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Jun 2001 13:02:57 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from rhun.esoterica.pt ([195.22.0.26]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 159QPI-0000Uj-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Jun 2001 13:02:56 +0100 Received: from srv17slx.esoterica.pt (srv17slx.esoterica.pt [195.22.0.47]) by rhun.esoterica.pt (8.11.2/8.11.2) with ESMTP id f5BC2FN19208 for ; Mon, 11 Jun 2001 13:02:15 +0100 (WEST) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from slave2 (por346.esoterica.pt [195.22.18.46]) by srv17slx.esoterica.pt (8.9.3+Sun/8.9.3) with SMTP id NAA13084 for ; Mon, 11 Jun 2001 13:02:14 +0100 (WET DST) Message-ID: <3.0.5.32.20010611120331.00891a90@pop3.esoterica.pt> X-Sender: brian@pop3.esoterica.pt X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.5 (32) Date: Mon, 11 Jun 2001 12:03:31 +0000 To: rsgb_lf_group@blacksheep.org From: "Brian Rogerson" Subject: Re: LF: [TECH] Help needed on toroid trasf. construction In-reply-to: <3B24ACC6.80671DF0@usa.net> References: <00c501c0ef45$d61a3ec0$5774ccd4@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: May I add a request please, I am looking for the design of an "ultimate" 3dB splitter for 136KHz with good characteristics to well down below 72KHz. 73, Brian At 13:34 11/06/01 +0200, you wrote: >Hi all, > I need some words of wisdom and a bit of help about the >construction of a small toroid transformer. > >First the antefact : I swapped recently my TS-850 for a TS-950SDX, >a very fine radio, but much less sensitive on the LF band than the TS-850. >Looking at the schematics, and doing some filter simulation with >Electronic Workbench, I think to have found the culprit, i.e. L3, a small >toroidal transfomer, with ratio 1:4, which is inserted in the signal path, >after the input attenuator, and before the filters bank. With all probability, >its response at 136kHz leaves much to be desired. The TS-850 doesn't >have any such transformer, the signal goes straight to the filters. > >So I have decided to replace it. Looking in the MiniCircuits catalog, I have >found what seems to be the ideal replacement, the T4-6T-KK81 model, which >has a -3dB response from 10kHz to 100MHz. Problem is that this transformer >is not carried in stock by the Italian distributor, and both they and the >MiniCircuits sales office have a minimum quantity amount for an order. > >At this point the only choice is to build it myself. And this is were your help could >come in my rescue. I need to know what your experiences are in building >such a wideband kind of transformers. What is the best type of material, >caveats to not forget, optimal number of turns, you name it. > >TNX for any help, > >73 Alberto I2PHD > > > > > 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 24282 invoked from network); 11 Jun 2001 11:43:08 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 11 Jun 2001 11:43:08 -0000 Received: (qmail 9046 invoked from network); 11 Jun 2001 11:42:46 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 11 Jun 2001 11:42:46 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159Pzw-0000ES-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Jun 2001 12:36:44 +0100 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 #2) id 159Pzs-0000EH-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Jun 2001 12:36:41 +0100 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 MAA122158; Mon, 11 Jun 2001 12:25:56 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (dyn9-87-105-152.italy.ibm.com [9.87.105.152]) by d06relay01.portsmouth.uk.ibm.com (8.11.1m3/NCO v4.96) with ESMTP id f5BBYCM86364; Mon, 11 Jun 2001 12:34:13 +0100 Message-ID: <3B24ACC6.80671DF0@usa.net> Date: Mon, 11 Jun 2001 13:34:31 +0200 From: "Alberto di Bene" X-Mailer: Mozilla 4.76 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org, lowfer@qth.net Subject: LF: [TECH] Help needed on toroid trasf. construction References: <00c501c0ef45$d61a3ec0$5774ccd4@194.95.193.10.fen.baynet.de> 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 need some words of wisdom and a bit of help about the construction of a small toroid transformer. First the antefact : I swapped recently my TS-850 for a TS-950SDX, a very fine radio, but much less sensitive on the LF band than the TS-850. Looking at the schematics, and doing some filter simulation with Electronic Workbench, I think to have found the culprit, i.e. L3, a small toroidal transfomer, with ratio 1:4, which is inserted in the signal path, after the input attenuator, and before the filters bank. With all probability, its response at 136kHz leaves much to be desired. The TS-850 doesn't have any such transformer, the signal goes straight to the filters. So I have decided to replace it. Looking in the MiniCircuits catalog, I have found what seems to be the ideal replacement, the T4-6T-KK81 model, which has a -3dB response from 10kHz to 100MHz. Problem is that this transformer is not carried in stock by the Italian distributor, and both they and the MiniCircuits sales office have a minimum quantity amount for an order. At this point the only choice is to build it myself. And this is were your help could come in my rescue. I need to know what your experiences are in building such a wideband kind of transformers. What is the best type of material, caveats to not forget, optimal number of turns, you name it. TNX for any help, 73 Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 96 invoked from network); 11 Jun 2001 11:08:26 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 11 Jun 2001 11:08:26 -0000 Received: (qmail 17880 invoked from network); 11 Jun 2001 11:08:05 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 11 Jun 2001 11:08:05 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159PRf-0008VH-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Jun 2001 12:01:19 +0100 X-MSMail-Priority: Normal Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 159PRb-0008VC-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Jun 2001 12:01:16 +0100 Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 159PQx-0005xf-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Jun 2001 12:00:35 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.232.252] (helo=mj9ar) by gemini.herts.ac.uk with smtp (Exim 3.22 #2) id 159PQw-0006cJ-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Jun 2001 12:00:34 +0100 From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Mon, 11 Jun 2001 12:01:39 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: 73kHz X-Mailer: Pegasus Mail for Win32 (v3.11) Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear John, Laurie, Mal & LF group, I have not been active on 73kHz just lately because I am in the throes of completing a new PA for this band. However, this is now looking promising, and I hope to be QRV with it before the weekend, pyrotechnics permitting. Whether my antenna will stand it is another matter, of course... The Rugby signal on 73.25kHz continues to be quite variable - I have lately seen it transmitting a single FSK 100Hz shift signal, and also a pair of 100Hz shift signals symetrically disposed around 73.25, with a separation between their centre frequencies of 150Hz or so - something worth bearing in mind when monitoring the band. The noise sidebands generated by this latter signal are very strong, so let's hope they don't do that too often! QRN has been strong during afternoon and night, but the mornings have been quiet. QRM seems to be at a lower level during the mornings too, so this remains probably the best time of day for a QSO. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17371 invoked from network); 11 Jun 2001 08:27:54 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 11 Jun 2001 08:27:54 -0000 Received: (qmail 3444 invoked from network); 11 Jun 2001 08:27:33 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 11 Jun 2001 08:27:33 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159Mvu-00079H-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Jun 2001 09:20:22 +0100 Received: from imo-r07.mx.aol.com ([152.163.225.103]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 159Mvq-00079C-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Jun 2001 09:20:19 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from G0MRF@aol.com by imo-r07.mx.aol.com (mail_out_v30.22.) id l.78.160f8462 (3999) for ; Mon, 11 Jun 2001 04:19:31 -0400 (EDT) From: G0MRF@aol.com Message-ID: <78.160f8462.2855d913@aol.com> Date: Mon, 11 Jun 2001 04:19:31 EDT Subject: Re: LF: Need 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 107 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In a message dated 6/9/01 3:42:14 PM GMT Daylight Time, gii3kev@netscapeonline.co.uk writes: << Hi All Sorry not LF. Does anyone have a cct diagram of a Microwave Modules 2m 100w lin amp type MML 144/100-S. >> Yes, I have that circuit diagram. (with a SRF1397 as the amplifer?) Would you like a photocopy sent and if so where, or a very large image file sent to your e-mail address? 73 David G0MRF From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28657 invoked from network); 11 Jun 2001 07:30:23 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 11 Jun 2001 07:30:23 -0000 Received: (qmail 28229 invoked from network); 11 Jun 2001 07:30:02 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 11 Jun 2001 07:30:02 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159LxY-0006fH-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Jun 2001 08:18:00 +0100 Received: from ns3.swh.sk ([192.108.125.37]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 159LxT-0006fC-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Jun 2001 08:17:56 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from hermes.swh.sk (hermes [192.108.125.60]) by ns3.swh.sk (8.11.0/8.11.0) with ESMTP id f5B7NtS09432 for ; Mon, 11 Jun 2001 09:23:55 +0200 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 JAA15276 for ; Mon, 11 Jun 2001 09:17:13 +0200 (MET DST) Received: by btss.swh.sk with Internet Mail Service (5.5.2653.19) id ; Mon, 11 Jun 2001 09:17:10 +0200 Message-ID: <29BDD4F529FCD311B631009027357C4E02258750@btss103a.swh.sk> From: "Gasparik Richard" To: "Rsgb_Lf_Group \(E-mail\)" Subject: LF: HAM meeting Borovce - success ! Date: Mon, 11 Jun 2001 09:17:07 +0200 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) 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... We had a nice weekend at HAM meeting Borovce. I set up my station saturday morning. The biggest problem was antenna, because there were no trees around. Antenna was 100m long and mostly horizontal in about 3-8m above the ground !!! The station was on the air from 0600Z until 1200Z and I worked only OK1FIG on CW (559/539), but I heard also DJ9IE (CW) and some QRSS stations. Many HAMs has been interesting for the station (specialy for COIL and TRANSMITTER - G0MRF project) and was no time to do more....I gave them a lot of informations about LF. The organizer was also very happy that so many people has been visiting the LF show. Even though I worked only one station, it was success. 73 de Rich OM2TW From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20361 invoked from network); 10 Jun 2001 23:40:57 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 10 Jun 2001 23:40:57 -0000 Received: (qmail 28764 invoked from network); 10 Jun 2001 23:40:37 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 10 Jun 2001 23:40:37 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159Ej1-00031z-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Jun 2001 00:34:31 +0100 Received: from imo-r09.mx.aol.com ([152.163.225.105]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 159Ej0-00031u-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Jun 2001 00:34:30 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from MarkusVester@aol.com by imo-r09.mx.aol.com (mail_out_v30.22.) id l.71.e2afee7 (3891) for ; Sun, 10 Jun 2001 19:33:48 -0400 (EDT) From: MarkusVester@aol.com Message-ID: <71.e2afee7.28555ddb@aol.com> Date: Sun, 10 Jun 2001 19:33:47 EDT Subject: LF: Re:"Deutschlandfunk" 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 72 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi group, watching with stereo-Spectrogram and an AM-radio, the 1000Hz hour-beeps on DLF disclosed another interesting detail: There is a slight time lag between the modulations on 153 (first) and 207/547kHz (both 30ms later). While the Luxembourg-IM on 137.83 had both beeps superimposed, the splatter reacted only to the early component by showing fuzzy lines at multiples of 1kHz, indicating 153kHz origin. 73 de Markus, DF6NM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8448 invoked from network); 10 Jun 2001 22:43:51 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 10 Jun 2001 22:43:51 -0000 Received: (qmail 11757 invoked from network); 10 Jun 2001 22:43:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 10 Jun 2001 22:43:26 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159DrM-0002Se-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Jun 2001 23:39:04 +0100 Received: from imo-m04.mx.aol.com ([64.12.136.7]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 159DrI-0002SY-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Jun 2001 23:39:00 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from MarkusVester@aol.com by imo-m04.mx.aol.com (mail_out_v30.22.) id l.bb.f6f11f5 (17233) for ; Sun, 10 Jun 2001 18:37:48 -0400 (EDT) From: MarkusVester@aol.com Message-ID: Date: Sun, 10 Jun 2001 18:37:47 EDT Subject: LF: Brian's SpecLab Plots 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 72 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Brian, hi group, it looks like I've had a 1-way contact to your SpecLab recorder last night :-). I had transmitted my callsign twice on 135922.2 using 30s dots between 21:50 and 23:43 UT. Lucky enough, the opening of our path occured in that period. My signal can first be detected in your TA-plot during a noise dip around 22:05, and rising up to some 8dB SNR around 22:27. Now I understand what the funny specialties Wolf implemented in SpecLab are good for... Besides functioning as a "parrot" for testing our TXs, these spectrograms contain a wealth of information. For example, the 350mW IMP visible at 135.36 originates only 160 km northwest of me, but fades in more than half an hour later. And who or what are the carriers on 136.50 (fading) and 135.75(constant)? The strange noise bands above 137.1 seem to be a local problem, as the noise between 20:15 and 05:05 (street lights?). The long dash before 02:00 on 137.84 is something I have regularly seen here, its a DBF39-Luxembourg-IMP with some AM-broadcast audio-tone. Sometime early in the last century, amateurs invented an ingeneous realtime-propagation-check method (called a QSO). Brian, I'm looking forward to do just that... 73 de Markus, DF6NM > Dear All, > > Following the launch of two very powerful facilities in SpecLab namely: > scheduled waterfall capture and scheduled export of Xcel compatible text files > it is possible to automate a PC data logger to look at the band and to plot > the peak amplitude of various signals in various bandwidths, the frequency > of each of those peak amplitudes and the noise floor. I have implemented > such a trial scheme to look at DCF39, CFH, 136KHz, the TA slot and SXV. > The intention is that my web pages should be updated around 0700utc > each morning. There is also a bonus, since Laurie G3AQC puts a very good > signal into this location there is a slot at 135915 to 135927Hz which is > automatically plotted, so if you want to try out your transmitter feel free, > the period between points plotted is 90s so any transmission must exceed > this several times to be useful. > > The URL for SpecLab is:http://www.qsl.net/dl4yhf/spectra1.html > > My sincere thanks to Wolf DL4YHF for all his help and patience. > > 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 20198 invoked from network); 10 Jun 2001 22:43:43 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 10 Jun 2001 22:43:43 -0000 Received: (qmail 11739 invoked from network); 10 Jun 2001 22:43:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 10 Jun 2001 22:43:23 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159DrO-0002Sk-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Jun 2001 23:39:06 +0100 Received: from imo-m05.mx.aol.com ([64.12.136.8]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 159DrM-0002SZ-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Jun 2001 23:39:04 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from MarkusVester@aol.com by imo-m05.mx.aol.com (mail_out_v30.22.) id l.120.1c895e (17233) for ; Sun, 10 Jun 2001 18:37:50 -0400 (EDT) From: MarkusVester@aol.com Message-ID: <120.1c895e.285550be@aol.com> Date: Sun, 10 Jun 2001 18:37:50 EDT Subject: LF: Strong splatter from "Deutschlandfunk"? 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 72 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi friends, on several occasions during the last months I have observed a high noise level in our LF band, mostly in the afternoon and on many evenings. For example today the band was rather quiet, with the usual background around -26dBuV/m/Hz at 137.4 kHz. Since some time about 02:00 UT the noise has increased by 15...20dB, and I can only hear the strongest signals. In USB mode, the QRM sounds like a wideband FM signal sweeping across the audio band. The spectrum of the splatter extends at least from 134 kHz up to Deutschlandfunk's 153kHz, and maybe beyond that. Its characteristics are clearly correlated to the modulation of DLF, in brief periods of silence the noise often narrows to an unstable carrier a few 100 Hz wide. At first I thought I might have some strange local crossmodulation problem, but Gerhard (DK6NI) and Walter (DJ2LF), both 20 km from me in different directions, confirmed the observation, whereas Reiner (DL3FDO) said the band was still quiet near Frankfurt. My theory is that there may be an intermittent fault in one of DLF's transmitters (153, 207 or 547 kHz) or in its (switched-mode?) modulator. If the problem persists, I would raise the point to our authorities (RegTP), but before that I'd appreciate some more hints from OMs in South Germany, and it would be great if someone with a loop could get bearings. Thank you, 73 Markus DF6NM in Nuernberg, JN59NK http://members.aol.com/DF6NM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20612 invoked from network); 10 Jun 2001 21:36:23 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 10 Jun 2001 21:36:23 -0000 Received: (qmail 10454 invoked from network); 10 Jun 2001 21:36:00 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 10 Jun 2001 21:36:00 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 159CmS-0001x9-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Jun 2001 22:29:56 +0100 Received: from cmailg3.svr.pol.co.uk ([195.92.195.173]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 159Clv-0001x4-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Jun 2001 22:29:23 +0100 Received: from modem-90.arossiach.dialup.pol.co.uk ([62.136.126.218] helo=g3aqc) by cmailg3.svr.pol.co.uk with smtp (Exim 3.13 #0) id 159Cl7-0004uw-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Jun 2001 22:28:34 +0100 Message-ID: <003801c0f1f4$50590760$da7e883e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: Re. A thank you etc. Date: Sun, 10 Jun 2001 22:27:56 +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
Hi Paul,
I think you have a very good situation there with your 130 ft tower and tall trees.I should not atempt to feed the tower ,but use it as a support for an "L" shaped ant. with one or more top load wires to the trees.If you keep the vert part away from the tower as much as possible it will only represent a relatively low loss capacitor (make sure it is returned to the earthy end of the loading coil) The wires to the trees should be as long as possible and should not come closer than 6feet from the foliage. The trees are a greater threat than the tower.Best of luck,I look foreward to a big signal in the future. 73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5331 invoked from network); 10 Jun 2001 10:33:53 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 10 Jun 2001 10:33:53 -0000 Received: (qmail 25483 invoked from network); 10 Jun 2001 10:33:06 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 10 Jun 2001 10:33:06 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 1592Lt-0005B3-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Jun 2001 11:21:49 +0100 X-MSMail-Priority: Normal Received: from [194.200.20.13] (helo=mailhost.netscapeonline.co.uk) by post.thorcom.com with esmtp (Exim 3.16 #2) id 1592Ls-0005Ay-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Jun 2001 11:21:48 +0100 Received: from ldsas16-80-131-211.cw-visp.com ([212.137.131.211] helo=netscapeonline.co.uk) by mailhost.netscapeonline.co.uk with esmtp (Exim 3.02 #1) id 1592Ek-0004GJ-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Jun 2001 10:14:27 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B23244E.F878D83B@netscapeonline.co.uk> Date: Sun, 10 Jun 2001 08:39:58 +0100 From: "gii3kev" Organization: Netscape Online member X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win95; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: RE. 73Khz. References: <001301c0f119$d0a31900$3287883e@g3aqc> 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  

Laurie Mayhead wrote:

In a recent mail Mal said that he was not surprised that my sigs were heard/seen in Canada, and that all that is required is a high/ long Ant and 1-5W ERP. This is quite true but I should like to point out that my Ant. is only 48ft high,although the top load is 600ft. Also my power was only 125mW. I agree that  more could be done with a bit more power and a higher Ant! but thats no reason for not trying Unfortunately I don't have a TX at the moment after my Bar-B-Que,but there must be others who do.73s Laurie.
Sorry Laurie to hear about your misfortune just in the middle of of your experiments, perhaps it got over EXCITED !!!!!!!!!!!!!!!
I use the same tx for both 73 and 136 khz, just change the drive input frequency and a different LPF at the output for each band. The tx is similar to the YXM design and runs nearly 1kw output.
The tx is robust, no explosions to date hi, but I monitor the SWR and DC current carefully for any changes. My antenna is also robust, with good quality insulators and 2.5 mm insulated wire through out. The system is all matched to 50 ohms, and every precaution taken to avoid any variations in loading. I observe virtually no changes regardless of the WX  except in gales when there is movement of the antenna wires, even then the swr does not exceed 1.5-1 but if it went higher I would close down until the storm passed. Precautions like the above avoid MELT DOWN !!!!!!!!!!!!!
My ground system consists of 2.5mm insulated radials and some sheep fencing (no buried copper wire)
73 de Mal/G3KEV
 
 
 
 
 
 
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 55 invoked from network); 10 Jun 2001 10:33:42 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 10 Jun 2001 10:33:42 -0000 Received: (qmail 25550 invoked from network); 10 Jun 2001 10:33:25 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 10 Jun 2001 10:33:25 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 1592Lz-0005BA-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Jun 2001 11:21:55 +0100 X-MSMail-Priority: Normal Received: from [194.200.20.13] (helo=mailhost.netscapeonline.co.uk) by post.thorcom.com with esmtp (Exim 3.16 #2) id 1592Ly-0005B5-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Jun 2001 11:21:54 +0100 Received: from ldsas16-80-131-211.cw-visp.com ([212.137.131.211] helo=netscapeonline.co.uk) by mailhost.netscapeonline.co.uk with esmtp (Exim 3.02 #1) id 1592Er-0004Ht-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Jun 2001 10:14:34 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B23389A.64E1C31D@netscapeonline.co.uk> Date: Sun, 10 Jun 2001 10:06:34 +0100 From: "gii3kev" Organization: Netscape Online member X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win95; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: "rsgb rsgb" Subject: LF: 73/136 KHZ 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 will be at my alt qth south of Cookstown/Tyrone from the 12th June for a couple of weeks. I will try and get on 136/73 khz if I get time and will be looking especially for M0BMU on 73 khz and IK5ZPV on 136 khz. These are the only 2 stations that responded to my recent bulletin about possible GI activity. The social activities in GI and other farm type work take priority. Only normal slow to fast CW available. I will monitor 7015 and 14015 cw for VE/W and European DX. I will be able to TX on these HF frequencies as well and work xband. 73 de Mal/GI3KEV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24553 invoked from network); 10 Jun 2001 07:57:21 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 10 Jun 2001 07:57:21 -0000 Received: (qmail 28004 invoked from network); 10 Jun 2001 07:57:03 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 10 Jun 2001 07:57:03 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15900w-00040P-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 10 Jun 2001 08:52:02 +0100 X-MSMail-Priority: Normal Received: from [194.200.20.13] (helo=mailhost.netscapeonline.co.uk) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15900v-00040K-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Jun 2001 08:52:01 +0100 Received: from ldsas11-75-126-213.cw-visp.com ([212.137.126.213] helo=netscapeonline.co.uk) by mailhost.netscapeonline.co.uk with esmtp (Exim 3.02 #1) id 158ztk-00068D-00 for rsgb_lf_group@blacksheep.org; Sun, 10 Jun 2001 07:44:37 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B231848.17AAA08@netscapeonline.co.uk> Date: Sun, 10 Jun 2001 07:48:40 +0100 From: "gii3kev" Organization: Netscape Online member X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win95; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Wire in the Air more info. References: <002801c0edbe$a5096780$b428893e@g3aqc> 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  

Laurie Mayhead wrote:

During the T/A tests last winter I ran out 2 additional radials 150 ft. long  into the sea water with 4ft long earth rods. Recently the grass had to be cut so I brought these radial in,carefully checking the Ant. current with and without the radials. NO DIFF!This brought me back to the" wire in the air theory" and I did somthing that I have been planning for some time. I added an extra 180 ft in the zig-zag configuration,in spite of the fact that Eznec recons that my top load is long enough to have linear current in the vert. section,and  no improvement to be gained from the additional wire in the air.(Rad. res. only increasing from 0.069-0.070ohms).   But Eznec doesnt adequately simulate currents in the ground at these frequencies. So I checked the Ant. current before and after. Before 3.2A after 3.7 Amps!!!Very worth while,and once again "Wire in the Air" is vastly superior to wire in the ground.,at my location at least. My 350mwERP is now 450mw ERP.Antenna now  48ft high,
Think of what could be achieved from those with 100 feet plus, vertical antennas top loaded with inverted L's top section of 300 feet or more or other configurations covering several acres of real estate.
There are plenty of radio amateurs suitably equipped with the hardware and proficient at high speed cw but not INTERESTED - watch out !!!!!!!!!!!!!!
G3KEV
 
 
 

vert section 42ft from top of loading coil. Horizontal top 650 ft (apart from last 180 ft which slopes to 40 ft.Top wires in zig zag config.  73s Laurie.

From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11714 invoked from network); 9 Jun 2001 20:11:59 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 9 Jun 2001 20:11:59 -0000 Received: (qmail 3895 invoked from network); 9 Jun 2001 20:11:37 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 9 Jun 2001 20:11:37 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 158p0d-00078J-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Jun 2001 21:06:59 +0100 Received: from smtp.snet.net ([204.60.6.55]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 158p0c-00078E-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Jun 2001 21:06:58 +0100 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 f59K6IC25476; Sat, 9 Jun 2001 16:06:18 -0400 (EDT) Received: from mainc (113.220.252.64.snet.net [64.252.220.113]) by pop.snet.net (8.11.1/8.11.1/SNET-pop-1.5/D-1.8/O-1.6) with SMTP id f59K6H502771; Sat, 9 Jun 2001 16:06:17 -0400 (EDT) Message-ID: <003801c0f121$f05215a0$71dcfc40@mshome.net> From: "Paul A. Cianciolo" To: rsgb_lf_group@blacksheep.org, lowfer@qth.net Subject: LF: A Thank you and some more antenna questions Date: Sat, 9 Jun 2001 16:22:42 -0400 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 Thank you all for your answers about my ground loss questions. It all has been extremely helpful. I also purchased the 2 books, The LF experimenters handbooks 2 and 3 !!! These are really great.!!! What I would like to do as I am hoping that the band s released to the US soon is to contemplate antenna systems and hopefully model some. Here is what I have at my disposal. My tower is 130' tall. It is located 160 feet directly behind my house. The tower is situated so that 1 guy wire is anchored in the woods which happens to be perpedicula to the back of my house. The other 2 are guy wire sets that are parralel with the back of the house. The problem is that this tower is grounded at the base and at all 6 guy points. The tower has 2 sets of anchors 1 at 80' and 1 at about 120'. It is guyed at 30, 60, 90, 120 feet, The 2 bottom sets of guys go to the close in anchors and the top 2 go to the a set of offset triangles or star mount which the 60 and 90' levels have 6 guy wires at each level,. The tower is grounded at the base and at each anchor. The antenna cable for HF beam and others come down to about the 20' level and then "fly" to the house at about 15' above the ground. Behind the tower is a 2 acres of woods that I can use, with treetops at the70 to 80 foot level Can anyone suggest a way to feed this tower? For use on the coming (I hope) 136 Khz band. Can it be shunt fed? I do have a pulley on an 8 foot extension arm that I could use to support a loop antenna. Open to all suggestions. Thank you again 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 Air Rifle Target Shooting Enthusiast From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26085 invoked from network); 9 Jun 2001 19:32:00 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 9 Jun 2001 19:32:00 -0000 Received: (qmail 21101 invoked from network); 9 Jun 2001 19:31:10 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 9 Jun 2001 19:31:10 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 158oM9-0006nB-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Jun 2001 20:25:09 +0100 Received: from mail4.svr.pol.co.uk ([195.92.193.211]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 158oM8-0006n6-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Jun 2001 20:25:08 +0100 Received: from modem-50.baranduin.dialup.pol.co.uk ([62.136.135.50] helo=g3aqc) by mail4.svr.pol.co.uk with smtp (Exim 3.13 #0) id 158oLW-0007Rn-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Jun 2001 20:24:30 +0100 Message-ID: <001301c0f119$d0a31900$3287883e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: RE. 73Khz. Date: Sat, 9 Jun 2001 17:48:24 +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
In a recent mail Mal said that he was not surprised that my sigs were heard/seen in Canada, and that all that is required is a high/ long Ant and 1-5W ERP. This is quite true but I should like to point out that my Ant. is only 48ft high,although the top load is 600ft. Also my power was only 125mW. I agree that  more could be done with a bit more power and a higher Ant! but thats no reason for not trying Unfortunately I don't have a TX at the moment after my Bar-B-Que,but there must be others who do. 
73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9256 invoked from network); 9 Jun 2001 15:36:41 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 9 Jun 2001 15:36:41 -0000 Received: (qmail 26624 invoked from network); 9 Jun 2001 15:36:18 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 9 Jun 2001 15:36:18 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 158khn-00054J-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Jun 2001 16:31:15 +0100 Received: from mx1.inr.net ([198.77.208.10]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 158khl-00054E-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Jun 2001 16:31:14 +0100 Received: from dixie (07-127.089.popsite.net [216.126.165.127]) by mx1.inr.net (8.9.3/8.9.3) with SMTP id LAA82065; Sat, 9 Jun 2001 11:29:54 -0400 (EDT) From: "RM" To: "Paul A. Cianciolo" , lowfer@qth.net, rsgb_lf_group@blacksheep.org, psk31@qth.net Subject: LF: RE: [PSK31] Need new sound card Date: Sat, 9 Jun 2001 11:30:28 -0400 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 In-reply-to: <003601c0f0ec$221196a0$71dcfc40@mshome.net> Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I would recommend Creative Labs Live Value sound card. Works great with PSK applications here on my Windows 2000 machine. Additionally, Creative Labs has been around for quite a while and their software (drivers/applications) support is outstanding. Plus, the Card produces outstanding quality sound. The Company tends to set the standards for sound cards. You can pick up a Live value in the Neighborhood of 50 dollars. Ron ........ NU1U -----Original Message----- From: owner-psk31@qth.net [mailto:owner-psk31@qth.net]On Behalf Of Paul A. Cianciolo Sent: Saturday, June 09, 2001 09:58 To: lowfer@qth.net; rsgb_lf_group@blacksheep.org; psk31@qth.net Subject: [PSK31] Need new sound card Hello Folks, Just got a 1 Ghz P3 with lots of memory and would you believe I forgot to include a sound card?????!!!!! It is all PCI bus so can anyone post to the reflector soundcard suggestions that are compatable. I run the normal programs such ARGO Spectran, PSK31 ,, and the rest Thank you very much 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 Air Rifle Target Shooting Enthusiast ______________________________________________________ To leave PSK31 , send mailto:majordomo@qth.net with the BODY of the message containing: unsubscribe psk31 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2482 invoked from network); 9 Jun 2001 14:50:27 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 9 Jun 2001 14:50:27 -0000 Received: (qmail 8996 invoked from network); 9 Jun 2001 14:50:08 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 9 Jun 2001 14:50:08 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 158jyw-0004hB-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Jun 2001 15:44:54 +0100 Received: from mail5.dada.it ([195.110.96.37] helo=mail.dada.it) by post.thorcom.com with smtp (Exim 3.16 #2) id 158jyv-0004h6-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Jun 2001 15:44:53 +0100 Received: (qmail 12822 invoked from network); 9 Jun 2001 14:44:06 -0000 Received: from unknown (HELO cestag) (195.110.102.20) by mail.dada.it with SMTP; 9 Jun 2001 14:44:06 -0000 Message-ID: <001e01c0f0f2$87d4dc80$14666ec3@cestag> From: "cesare tagliabue" To: rsgb_lf_group@blacksheep.org Subject: LF: R: Re: Hell transmission, antenna height Date: Sat, 9 Jun 2001 16:42:49 +0200 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 dear Markus hi all Evidently my brain was a bit sleepy hi! I suspected that the Hell transmission could be an answer to my call, being the signal starting immediately after the end of my CQs but, due to the very strong noise, the characters were a bit confused and I've not thinking to the fact that I was in LSB; perhaps was sufficient to look at the screen through a mirror hi!. Well! will be for a further opportunity. Unfortunately, my little transceiver, that I've built quickly in winter 1999, works only in LSB, but I can use, as RX, the main transceiver, that works well in all mode with a 500 Hz filter for CW. OK for your higher antenna, it works quite well, leave the aluminium rod in place as long as possible!! My best 73 Cesare Cesare Tagliabue I 5 TGC WW-Loc JN53PS e-mail: cestag@dada.it url: http://www.dadacasa.com/i5tgc From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15319 invoked from network); 9 Jun 2001 14:44:57 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 9 Jun 2001 14:44:57 -0000 Received: (qmail 16324 invoked from network); 9 Jun 2001 14:44:07 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 9 Jun 2001 14:44:07 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 158jtG-0004a9-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Jun 2001 15:39:02 +0100 X-MSMail-Priority: Normal Received: from [194.200.20.13] (helo=mailhost.netscapeonline.co.uk) by post.thorcom.com with esmtp (Exim 3.16 #2) id 158jtF-0004a4-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Jun 2001 15:39:01 +0100 Received: from ldsas16-80-131-169.cw-visp.com ([212.137.131.169] helo=netscapeonline.co.uk) by mailhost.netscapeonline.co.uk with esmtp (Exim 3.02 #1) id 158jm9-0003EM-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Jun 2001 14:31:42 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B222609.F4122492@netscapeonline.co.uk> Date: Sat, 09 Jun 2001 14:35:05 +0100 From: "gii3kev" Organization: Netscape Online member X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win95; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: "rsgb rsgb" Subject: LF: Need 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 Sorry not LF. Does anyone have a cct diagram of a Microwave Modules 2m 100w lin amp type MML 144/100-S. Your help would be much appreciated and if possible send it as an attachment to me direct on here. My amp has a fault and a diagram would speed the repair up instead of having to trace the cct. Thanks in advance. de Mal/G3KEV/Scarborough From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6219 invoked from network); 9 Jun 2001 14:42:26 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 9 Jun 2001 14:42:26 -0000 Received: (qmail 15674 invoked from network); 9 Jun 2001 14:42:01 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 9 Jun 2001 14:42:01 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 158jr0-0004Zx-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Jun 2001 15:36:42 +0100 Received: from mail.ionet.net ([206.41.128.16] helo=ionet.net ident=root) by post.thorcom.com with esmtp (Exim 3.16 #2) id 158jqy-0004Zo-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Jun 2001 15:36:41 +0100 Received: from ken (ip130.oklahoma-city24.ok.pub-ip.psi.net [38.36.83.130]) by ionet.net (8.9.1a/8.9.1) with SMTP id JAA18052; Sat, 9 Jun 2001 09:36:16 -0500 (CDT) Message-ID: <011801c0f0f0$fd3685c0$82532426@ken> From: "Ken WA5DTL" To: "Paul A. Cianciolo" , lowfer@qth.net, rsgb_lf_group@blacksheep.org, psk31@qth.net References: <003601c0f0ec$221196a0$71dcfc40@mshome.net> Subject: LF: Re: [PSK31] Need new sound card Date: Sat, 9 Jun 2001 09:32:10 -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 5.50.4522.1200 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: Hello Paul.... Any good soundcard will work. I would suggest a Creative SoundBlaster Live 128.....PCI.... I love mine... 128 voices is nice to 12" speakers with surround sound... Works good for SSTV and PSK31 also... 73 Ken WA5DTL Oklahoma City, Ok. A fine is a tax for doing wrong. A tax is a fine for doing well. > Hello Folks, > > Just got a 1 Ghz P3 with lots of memory and would you believe I forgot to > include a sound card?????!!!!! > > It is all PCI bus so can anyone post to the reflector soundcard suggestions > that are compatable. > > I run the normal programs such ARGO Spectran, PSK31 ,, and the rest > > Thank you very much > 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 > Air Rifle Target Shooting Enthusiast > > > ______________________________________________________ > > To leave PSK31 , send mailto:majordomo@qth.net > with the BODY of the message containing: > > unsubscribe psk31 > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6410 invoked from network); 9 Jun 2001 14:36:08 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 9 Jun 2001 14:36:08 -0000 Received: (qmail 3458 invoked from network); 9 Jun 2001 14:35:21 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 9 Jun 2001 14:35:21 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 158jke-0004Zd-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Jun 2001 15:30:08 +0100 Received: from rubellite.lion-access.net ([212.19.217.4]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 158jkc-0004ZY-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Jun 2001 15:30:07 +0100 Received: from w8k3f0 (Dragonair.Pokemon.dialin.freeler.nl [212.26.214.241]) by rubellite.lion-access.net (I-Lab) with SMTP id 0512439DE for ; Sat, 9 Jun 2001 14:28:26 +0000 (GMT) Message-ID: <003301c0f0f1$25e62c00$0100007f@w8k3f0> From: "Dick Rollema" To: rsgb_lf_group@blacksheep.org References: <001c01c0f0ad$8d9785e0$5374ccd4@194.95.193.10.fen.baynet.de> Subject: LF: Re: Re: e-mail address G3PLX Date: Sat, 9 Jun 2001 16:04:06 +0200 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
Dear Walter,
 
Many thanks for your reply.
 
No, Peter is not living in Gosport anymore. Several years ago he moved to Cumbria.
In the meantime Andy, G4JNT, has provided the e-mail address I asked for on behalf of a good friend.
 
Several years ago I often worked Peter on 40 and 80 m using Hell; Peter did it with a computer program he had written himself and I used a genuine Wehrmacht 1944 Feldfernschreiber.
 
73, Dick, PA0SE
----- Oorspronkelijk bericht -----
Verzonden: zaterdag 9 juni 2001 8:28
Onderwerp: LF: Re: e-mail address G3PLX

Dear Dick,
  in a 1992 radio amateur callbook I found
G.P.Martinez, 11 Marchwood Court, Fort Gomer, Gosport, Hants. Hopefully he is still living there.
73 Walter DJ2LF
 
-----Ursprüngliche Nachricht-----
Von: Dick Rollema <d.w.rollema@freeler.nl>
An: LF-Group <rsgb_lf_group@blacksheep.org>
Datum: Freitag, 8. Juni 2001 14:19
Betreff: LF: e-mail address G3PLX

To All from PA0SE
 
Can someone provide me with the e-mail address of Peter Martinez, G3PLX?
 
Thanks!
 
73, Dick, PA0SE
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20798 invoked from network); 9 Jun 2001 13:47:36 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 9 Jun 2001 13:47:36 -0000 Received: (qmail 10925 invoked from network); 9 Jun 2001 13:47:16 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 9 Jun 2001 13:47:16 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 158izz-00047R-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Jun 2001 14:41:55 +0100 Received: from smtp.snet.net ([204.60.6.55]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 158izy-00047M-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Jun 2001 14:41:54 +0100 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 f59DfEC25328; Sat, 9 Jun 2001 09:41:14 -0400 (EDT) Received: from mainc (113.220.252.64.snet.net [64.252.220.113]) by pop.snet.net (8.11.1/8.11.1/SNET-pop-1.5/D-1.8/O-1.6) with SMTP id f59DfD521708; Sat, 9 Jun 2001 09:41:13 -0400 (EDT) Message-ID: <003601c0f0ec$221196a0$71dcfc40@mshome.net> From: "Paul A. Cianciolo" To: lowfer@qth.net, rsgb_lf_group@blacksheep.org, psk31@qth.net Subject: LF: Need new sound card Date: Sat, 9 Jun 2001 09:57:32 -0400 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, Just got a 1 Ghz P3 with lots of memory and would you believe I forgot to include a sound card?????!!!!! It is all PCI bus so can anyone post to the reflector soundcard suggestions that are compatable. I run the normal programs such ARGO Spectran, PSK31 ,, and the rest Thank you very much 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 Air Rifle Target Shooting Enthusiast From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23100 invoked from network); 9 Jun 2001 09:04:11 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 9 Jun 2001 09:04:11 -0000 Received: (qmail 29535 invoked from network); 9 Jun 2001 09:03:52 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 9 Jun 2001 09:03:52 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 158eW8-0001yM-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Jun 2001 09:54:48 +0100 X-MSMail-Priority: Normal Received: from [194.200.20.13] (helo=mailhost.netscapeonline.co.uk) by post.thorcom.com with esmtp (Exim 3.16 #2) id 158eW4-0001yH-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Jun 2001 09:54:44 +0100 Received: from ldsas11-75-126-97.cw-visp.com ([212.137.126.97] helo=netscapeonline.co.uk) by mailhost.netscapeonline.co.uk with esmtp (Exim 3.02 #1) id 158eOz-0001Py-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Jun 2001 08:47:26 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B21D48C.A8D4346A@netscapeonline.co.uk> Date: Sat, 09 Jun 2001 08:47:25 +0100 From: "gii3kev" Organization: Netscape Online member X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win95; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: "rsgb rsgb" Subject: LF: 73 khz 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 am not surprised that Laurie has been seen/heard on 73 khz in VE1. I said in a message some months ago that 73 khz was suitable for a transatlantic qso, under normal to good propagation conditions and with the power we are permitted to use. This therefore is not a surprised to me and in fact any LF frequency given suitable propagation and modest power would work long haul. High power is normally associated with LF for reliability purposes and one tends to think that it is a necessity for communications over long distances but this is not true, especially for a radio amateur who only wants an occasional qso and some excitement. With a modest vertical 100 - 150 feet tower in the clear and top loaded, a suitable ground radial system and modest power say 1 - 5w erp a lot could be achieved on LF long haul. I know at least 9 radio amateurs that have these facilities, only two so far are active on LF. One of these persons has 3 x 130 ft towers, and most of the others have 2 each in excess of 100 feet. Most of these amateurs are located in GI land, there are probably quite a lot more high towers throughout Europe that I do not know about and would be suitable for LF if the persons were interested, but it appears that most are NOT. The uptake in LF activities around Europe is very slow, and those best equipped with suitable antenna masts and real estate are the LEAST interested. 73 de Mal/G3KEV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12044 invoked from network); 9 Jun 2001 06:39:36 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 9 Jun 2001 06:39:36 -0000 Received: (qmail 4173 invoked from network); 9 Jun 2001 06:39:16 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 9 Jun 2001 06:39:16 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 158cIl-0000yO-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 09 Jun 2001 07:32:51 +0100 Received: from [212.204.115.10] (helo=hugo.fen-net.de ident=root) by post.thorcom.com with esmtp (Exim 3.16 #2) id 158cIj-0000yJ-00 for rsgb_lf_group@blacksheep.org; Sat, 09 Jun 2001 07:32:50 +0100 Received: from 194.95.193.10.fen.baynet.de (dialin-nbg-083.fen-net.de [212.204.116.83]) by hugo.fen-net.de (8.9.1/8.9.1) with SMTP id IAA18412 for ; Sat, 9 Jun 2001 08:30:32 +0200 (MET DST) Message-ID: <001c01c0f0ad$8d9785e0$5374ccd4@194.95.193.10.fen.baynet.de> From: "Walter Staubach" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: e-mail address G3PLX Date: Sat, 9 Jun 2001 08:28:21 +0200 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
Dear Dick,
  in a 1992 radio amateur callbook I found
G.P.Martinez, 11 Marchwood Court, Fort Gomer, Gosport, Hants. Hopefully he is still living there.
73 Walter DJ2LF
 
-----Ursprüngliche Nachricht-----
Von: Dick Rollema <d.w.rollema@freeler.nl>
An: LF-Group <rsgb_lf_group@blacksheep.org>
Datum: Freitag, 8. Juni 2001 14:19
Betreff: LF: e-mail address G3PLX

To All from PA0SE
 
Can someone provide me with the e-mail address of Peter Martinez, G3PLX?
 
Thanks!
 
73, Dick, PA0SE
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29378 invoked from network); 8 Jun 2001 22:37:16 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 8 Jun 2001 22:37:16 -0000 Received: (qmail 16885 invoked from network); 8 Jun 2001 22:36:49 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 8 Jun 2001 22:36:49 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 158UoW-0005nV-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Jun 2001 23:33:08 +0100 Received: from jubilee.ns.sympatico.ca ([142.177.1.6] helo=mail-ns00s0.ns.sympatico.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 158UoV-0005nP-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Jun 2001 23:33:07 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.88.14]) by mail-ns00s0.ns.sympatico.ca (Post.Office MTA v3.5.3 release 223 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Fri, 8 Jun 2001 19:31:48 -0300 Message-ID: <3B218BA7.FFEA30AA@ns.sympatico.ca> Date: Fri, 08 Jun 2001 22:36:24 -0400 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: Re. 73KHz T/A References: <001801c0f019$79283260$37a2883e@g3aqc> 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 Hi Laurie ,  Sorry to hear about the failure.  Hope you get it fixed soon ,  73 de John VE1ZJ

Laurie Mayhead wrote:

Hi All,I have just dismantled the B and K 1000 watt amp that failed the other night. I found a 2X2 inch area of the PCB completely burnt out ! including all the components in the output filter and relay switching circuit.Wether the damage extends beyond this I dont know,but what is clear is that there will be no X'missions fromhere for some time. So its over to you .  73s All  Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2870 invoked from network); 8 Jun 2001 22:17:34 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 8 Jun 2001 22:17:34 -0000 Received: (qmail 19801 invoked from network); 8 Jun 2001 22:16:41 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 8 Jun 2001 22:16:41 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 158UTz-0005aI-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Jun 2001 23:11:55 +0100 Received: from imo-m05.mx.aol.com ([64.12.136.8]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 158UTw-0005aD-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Jun 2001 23:11:52 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from MarkusVester@aol.com by imo-m05.mx.aol.com (mail_out_v30.22.) id l.7f.15921029 (4365) for ; Fri, 8 Jun 2001 18:10:34 -0400 (EDT) From: MarkusVester@aol.com Message-ID: <7f.15921029.2852a759@aol.com> Date: Fri, 8 Jun 2001 18:10:33 EDT Subject: LF: Re: Hell transmission, antenna height 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 72 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear Cesare, hi group, great to hear this! Yes, I had tried to answer your CQ's in Hell. Judging from what you have read, you were apparently watching in LSB mode, whereas I was transmitting USB (higher freq on top): "I5TGC DF6NM K" :-) . Tnx for the report, I hope we have another chance soon. This week, I have put an extra aluminium telescoping rod in the chimney beneath the fiberglass pole, elevating its tip from 6m to about 12m above our rooftop. Comparing the received voltage from DBF39 against a nonresonant loop, I measured the effective height as 9.3m. With a total loss resistance of 36 Ohms, I thus get 0.08% efficiency and about 100mW radiated power at 1.9A, some 5dB more than before. But its a little scary to see the makeshift mast bend in the wind, so I may soon have to retract it. 73 de Markus, DF6NM http://members.aol.com/DF6NM > Hi all > Yesterday evening, between 19.00 and 19.30 UTC, while I was sending > some unattended QRSS CQs, I've seen, around 137.72, an Hell signal, > unfortunately corrupted by the noise. At first I've read something as I2ACE > DL?KW, later I've read something as I2LCC D???? K. Some characters were > absolutely indecipherable, someone can give me some informations ? 73 > Cesare > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15476 invoked from network); 8 Jun 2001 13:21:10 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 8 Jun 2001 13:21:10 -0000 Received: (qmail 3566 invoked from network); 8 Jun 2001 13:20:51 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 8 Jun 2001 13:20:51 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 158M4e-0001XB-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Jun 2001 14:13:12 +0100 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 #2) id 158M4Z-0001Va-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Jun 2001 14:13:07 +0100 Received: from miked by rsgb.org.uk with SMTP (MDaemon.PRO.v4.0.0.R) for ; Fri, 08 Jun 2001 14:08:28 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Fri, 8 Jun 2001 14:08:12 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: Wire in the Air etc Message-ID: <3B20DC4C.4954.F308C4@localhost> In-reply-to: <003f01c0eec5$8bbd9780$90b21bca@xtr743187> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-Return-Path: miked@mail X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dialogue between G4CNN and ZL2CA: > > If this is so then elevating the loading coil, either by putting it high > up the vertical element or simply by raising it as high above the ground as > possible must contribute to an improved signal. Presumably as usual this will > appear as a reduction in the resistance at resonance. This I think will be my > next experiment. Alternatively a longer coil should raise the high voltage part > of the coil and also reduce losses. Comments? > > Lower system resistance allows more current to circulate, for a given > applied power. So doing things that lowers system resistance is always "a > winner". The height above ground for the loading coil is mainly a matter of > impacting on CURRENT DISTRIBUTION and that is reflected in a moderately higher > value of radiation resistance. The radiation resistance is very difficult to > test, as it is of the order of milliohms versus tens of ohms for other losses. > > Mechanical support of a low loss LF loading coil is challenge, as is > weatherproofing (for high voltage). I thought we had put this one to bed. Practical experiments by several of us, including myself and ON7YD, have shown that in some cases raising the loading coil produces a significant improvement. This is normally when local objects - houses, trees - are causing absorption, and when the length of the top section is small compared to the overall length. I can go into why this works, but this has been done before. It is sufficient to say that under those conditions the case has been shown to be true. What I have not yet seen is an experiment with raising the loading coil of an antenna way out in the open. My gut feeling is that this will still show an improvement. It is not worth bothering with if the top section is large. My antenna has 14m vertical and three 18m parallel top wires spaced 0.5m apart. As for mechanical problem, I have not experienced any, though I have had to be ingenious. Certainly, you can't put a huge coil high up, but the gain to be had in some cases far outweighs any reduction in coil efficiency. In the case of a 'T' antenna supported at the ends, the coil must be made very lightweight. This is not a real problem. In the case of an inverted-L there should be no problem at all as the coil can be mounted on top of the mast. As for weatherproofing, I find black plastic tape quite adequate and long-lasting. My elevated coil uses a coke bottle as the former and is suspended horizontally between the mast and the antenna by some polyprop 'string' running through the inside of the former. In short, if you have a small antenna with close-by trees, it is well worth going to the trouble of designing an elevated coil. If not, it is probably not worth it. 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 5481 invoked from network); 8 Jun 2001 12:55:14 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 8 Jun 2001 12:55:14 -0000 Received: (qmail 6028 invoked from network); 8 Jun 2001 12:54:52 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 8 Jun 2001 12:54:52 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 158LiS-0001IH-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Jun 2001 13:50:16 +0100 Received: from mail12.svr.pol.co.uk ([195.92.193.215]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 158LiP-0001IC-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Jun 2001 13:50:13 +0100 Received: from modem-55.durin.dialup.pol.co.uk ([62.136.162.55] helo=g3aqc) by mail12.svr.pol.co.uk with smtp (Exim 3.13 #0) id 158Lhm-0003TG-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Jun 2001 13:49:35 +0100 Message-ID: <001801c0f019$79283260$37a2883e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: Re. 73KHz T/A Date: Fri, 8 Jun 2001 13:48:58 +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
Hi All,
I have just dismantled the B and K 1000 watt amp that failed the other night. I found a 2X2 inch area of the PCB completely burnt out ! including all the components in the output filter and relay switching circuit.Wether the damage extends beyond this I dont know,but what is clear is that there will be no X'missions from
here for some time. So its over to you .  73s All  Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17636 invoked from network); 8 Jun 2001 12:02:24 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 8 Jun 2001 12:02:24 -0000 Received: (qmail 6241 invoked from network); 8 Jun 2001 12:02:02 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 8 Jun 2001 12:02:02 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 158KkF-0000iA-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Jun 2001 12:48:03 +0100 Received: from lepidachrosite.lion-access.net ([212.19.217.3]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 158KkA-0000i5-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Jun 2001 12:47:59 +0100 Received: from w8k3f0 (Paratrooper.Games.dialin.freeler.nl [212.26.213.174]) by lepidachrosite.lion-access.net (I-Lab) with SMTP id 67C75CAE74 for ; Fri, 8 Jun 2001 11:46:14 +0000 (GMT) Message-ID: <01b701c0f011$5eb98260$aed51ad4@w8k3f0> From: "Dick Rollema" To: "LF-Group" Subject: LF: e-mail address G3PLX Date: Fri, 8 Jun 2001 13:50:31 +0200 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
 
Can someone provide me with the e-mail address of Peter Martinez, G3PLX?
 
Thanks!
 
73, Dick, PA0SE
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7543 invoked from network); 8 Jun 2001 06:59:14 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 8 Jun 2001 06:59:14 -0000 Received: (qmail 12623 invoked from network); 8 Jun 2001 06:58:52 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 8 Jun 2001 06:58:52 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 158G9W-000714-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Jun 2001 07:53:50 +0100 Received: from ns3.swh.sk ([192.108.125.37]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 158G9U-00070z-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Jun 2001 07:53:48 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from hermes.swh.sk (hermes [192.108.125.60]) by ns3.swh.sk (8.11.0/8.11.0) with ESMTP id f586xjS25456 for ; Fri, 8 Jun 2001 08:59:45 +0200 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 IAA11750 for ; Fri, 8 Jun 2001 08:53:02 +0200 (MET DST) Received: by btss.swh.sk with Internet Mail Service (5.5.2653.19) id ; Fri, 8 Jun 2001 08:52:59 +0200 Message-ID: <29BDD4F529FCD311B631009027357C4E0225874C@btss103a.swh.sk> From: "Gasparik Richard" To: "Rsgb_Lf_Group \(E-mail\)" Subject: LF: HAM meeting Borovce - demonstration station QRV... Date: Fri, 8 Jun 2001 08:52:56 +0200 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) 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 be QRV saturday morning from the HAM meeting in Borovce (Slovakia). I will set up the demonstration station using my own callsign, starting about 0800Z. I'll try CW and QRSS too. I hope to see you on 136kc. Best regards...73 de Rich OM2TW From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6115 invoked from network); 8 Jun 2001 05:55:48 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 8 Jun 2001 05:55:48 -0000 Received: (qmail 21759 invoked from network); 8 Jun 2001 05:55:25 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 8 Jun 2001 05:55:25 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 158F6S-0006Xv-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Jun 2001 06:46:36 +0100 Received: from mail5.dada.it ([195.110.96.37] helo=mail.dada.it) by post.thorcom.com with smtp (Exim 3.16 #2) id 158F6O-0006Xq-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Jun 2001 06:46:32 +0100 Received: (qmail 24901 invoked from network); 8 Jun 2001 05:45:48 -0000 Received: from unknown (HELO cestag) (195.110.102.115) by mail.dada.it with SMTP; 8 Jun 2001 05:45:48 -0000 Message-ID: <000901c0efde$2928ece0$73666ec3@cestag> From: "cesare tagliabue" To: "LF group" Subject: LF: Hell transmission Date: Fri, 8 Jun 2001 07:44:27 +0200 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
        Yesterday evening, between 19.00 and 19.30 UTC, while I was sending some unattended QRSS CQs, I've seen, around 137.72, an Hell signal, unfortunately corrupted by the noise. At first I've read something as I2ACE  DL?KW, later I've read something as I2LCC D???? K. Some characters were absolutely indecipherable, someone can give me some informations ?   73  Cesare
 
Cesare Tagliabue   I 5 TGC
WW-Loc  JN53PS
e-mail: cestag@dada.it
url: http://www.dadacasa.com/i5tgc
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12194 invoked from network); 7 Jun 2001 20:15:31 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 7 Jun 2001 20:15:31 -0000 Received: (qmail 27623 invoked from network); 7 Jun 2001 20:14:38 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 7 Jun 2001 20:14:38 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15862H-00020H-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 07 Jun 2001 21:05:41 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from mailout06.sul.t-online.com ([194.25.134.19] helo=mailout06.sul.t-online.de) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15862E-00020C-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Jun 2001 21:05:38 +0100 Received: from fwd00.sul.t-online.de by mailout06.sul.t-online.de with smtp id 15861Y-0007gH-08; Thu, 07 Jun 2001 22:04:56 +0200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from (0482183881-0001@[62.157.50.12]) by fwd00.sul.t-online.com with smtp id 15861L-2Gw784C; Thu, 7 Jun 2001 22:04:43 +0200 From: "jannsen" <0482183881-0001@t-online.de> To: rsgb_lf_group@blacksheep.org References: <200106052014.f55KEdN15722@smtp.wanadoo.nl> Subject: Re: LF: Re. 73KHz tests 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, 7 Jun 2001 22:04:43 +0200 Message-ID: <15861L-2Gw784C@fwd00.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: Ko Versteeg schrieb: skip > For 73 i used,- > Antenna: Chelcom Hf-v1. [ ¼Wave helical for 80m ] > Pre-amp: 28dB. > Filter: 25Hz. > > Hope to see some more on Friday and Saturday night, > can't make it any other night :-( > > 73 de Ko, NL9222. Hi Ko, what kind of receiver do u use ? regards Uwe/dj8wx From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29440 invoked from network); 7 Jun 2001 11:48:36 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 7 Jun 2001 11:48:36 -0000 Received: (qmail 4876 invoked from network); 7 Jun 2001 11:48:10 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 7 Jun 2001 11:48:10 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157y6r-0006YE-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 07 Jun 2001 12:37:53 +0100 Received: from [212.204.115.10] (helo=hugo.fen-net.de ident=root) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157y6n-0006Y9-00 for rsgb_lf_group@blacksheep.org; Thu, 07 Jun 2001 12:37:50 +0100 Received: from 194.95.193.10.fen.baynet.de (dialin-nbg-076.fen-net.de [212.204.116.76]) by hugo.fen-net.de (8.9.1/8.9.1) with SMTP id NAA02731 for ; Thu, 7 Jun 2001 13:35:37 +0200 (MET DST) Message-ID: <00c501c0ef45$d61a3ec0$5774ccd4@194.95.193.10.fen.baynet.de> From: "Walter Staubach" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Re: LF Meeting at the Ham Radio, June 30th Date: Thu, 7 Jun 2001 13:33:42 +0200 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
Hallo Alberto - and all other friends who intend to come to the HAMRADIO,
  we would be glad to welcome you at our LF-meeting. But sorry we will still hold it in German. Maybe in the next years we`ll be more international and speak more or less English more or less good. (Meanwhile you should learn a few terms or sentences in the bavarian dialect, that could help a lot ;-)
  If you want to tell us something about your software - that would be welcome, even in English.
And after the official two hours let`s meet in the "Dorfkrug" (restaurant), 200meters apart, for an open end chat. Food, beer and wine recommended.
73 Walter DJ2LF
 
-----Ursprüngliche Nachricht-----
Von: Alberto di Bene <dibene@usa.net>
An: rsgb_lf_group@blacksheep.org <rsgb_lf_group@blacksheep.org>
Datum: Montag, 4. Juni 2001 12:44
Betreff: LF: Re: LF Meeting at the Ham Radio, June 30th

DL4YHF@aol.com wrote:
Hello group,

As in the past years, there will be a meeting of LF friends during the Ham
Radio (hamfest in Friedrichshafen at the Bodensee, close to the HB9 and OE
border).
[...]

Then probably we will be able to met in person, Wolf.
Myself and Vittorio, IK2CZL will be there with a 90 % confidence level.
Only hope the meeting won't be held in German...:-)

73  Alberto  I2PHD
 

From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13233 invoked from network); 6 Jun 2001 22:06:49 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 6 Jun 2001 22:06:49 -0000 Received: (qmail 376 invoked from network); 6 Jun 2001 22:06:24 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 6 Jun 2001 22:06:24 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157lN7-0000Dj-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Jun 2001 23:01:49 +0100 Received: from jubilee.ns.sympatico.ca ([142.177.1.6] helo=mail-ns00s0.ns.sympatico.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157lN6-0000De-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Jun 2001 23:01:48 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.97.8]) by mail-ns00s0.ns.sympatico.ca (Post.Office MTA v3.5.3 release 223 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Wed, 6 Jun 2001 18:28:55 -0300 Message-ID: <3B1ED9E9.DAE7FDB2@ns.sympatico.ca> Date: Wed, 06 Jun 2001 21:33:29 -0400 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: Re. 73KHz tests References: <001e01c0edd4$4caf9940$d294883e@g3aqc> 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 Hi Laurie ,  Sri no picts that night.  Will keep looking 73 es GL de john VE1ZJ
P.S.  Plans for  tx   ant are firming up
Laurie Mayhead wrote:
Hi John,Sorry nothing seen last night. I am quite keen to confirm the other nights sighting so will transmit again tonight. Freq. confirmed as 71,921.5KHz. shift now a little greater at 0.1hzDFCW of course using 30sec dot length.Thanks for looking.73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15922 invoked from network); 6 Jun 2001 21:46:57 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 6 Jun 2001 21:46:57 -0000 Received: (qmail 12014 invoked from network); 6 Jun 2001 21:46:32 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 6 Jun 2001 21:46:32 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157kzW-0008Up-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Jun 2001 22:37:26 +0100 Received: from cmailg6.svr.pol.co.uk ([195.92.195.176]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157kzT-0008Ui-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Jun 2001 22:37:23 +0100 Received: from modem-20.anduin.dialup.pol.co.uk ([62.136.108.148] helo=g3aqc) by cmailg6.svr.pol.co.uk with smtp (Exim 3.13 #0) id 157kyq-0006te-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Jun 2001 22:36:44 +0100 Message-ID: <000e01c0eed0$c6c9dc20$946c883e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: Re. Beacon. Date: Wed, 6 Jun 2001 22:36:03 +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
Hi John and all.
Sorry can't run the beacon tonight,problem rather more serious than just blown fuses.Will try to fix in the next day or two. I hope!
73s  Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2234 invoked from network); 6 Jun 2001 20:23:57 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 6 Jun 2001 20:23:57 -0000 Received: (qmail 16755 invoked from network); 6 Jun 2001 20:23:06 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 6 Jun 2001 20:23:06 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157jhB-0007vI-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Jun 2001 21:14:25 +0100 Received: from mta1-rme.xtra.co.nz ([203.96.92.1]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157jh7-0007vC-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Jun 2001 21:14:21 +0100 Received: from xtr743187 ([202.27.178.144]) by mta1-rme.xtra.co.nz with SMTP id <20010606201420.KGHG1605144.mta1-rme.xtra.co.nz@xtr743187> for ; Thu, 7 Jun 2001 08:14:20 +1200 Message-ID: <003f01c0eec5$8bbd9780$90b21bca@xtr743187> From: "Vernall" To: rsgb_lf_group@blacksheep.org References: <775449.991848311278.JavaMail.computernetworks@gomailjtp01> Subject: Re: LF: Wire in the Air etc Date: Thu, 7 Jun 2001 08:15:21 +1200 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: John G4CNN, > Dick PA0SE mentioned recently that radiation from the loading coil is approximately equivalent to the radiation from a piece of wire of the same length. This must surely mean that the reduction in the size of the loading coil, when one can put more wire in the sky, does not just reduce loading coil losses resulting from the reduced RF resistance of the coil, but perhaps more importantly by moving radiated energy up and away from the earth, where it has some chance of not being absorbed by the immediate environment. You are over-complicating the claim. All that is being said is that if the coil is x metres high, then irrespective of the coils of wire, it is reasonable to include x metres in the consideration of antenna effective height. > If this is so then elevating the loading coil, either by putting it high up the vertical element or simply by raising it as high above the ground as possible must contribute to an improved signal. Presumably as usual this will appear as a reduction in the resistance at resonance. This I think will be my next experiment. Alternatively a longer coil should raise the high voltage part of the coil and also reduce losses. Comments? Lower system resistance allows more current to circulate, for a given applied power. So doing things that lowers system resistance is always "a winner". The height above ground for the loading coil is mainly a matter of impacting on CURRENT DISTRIBUTION and that is reflected in a moderately higher value of radiation resistance. The radiation resistance is very difficult to test, as it is of the order of milliohms versus tens of ohms for other losses. Mechanical support of a low loss LF loading coil is challenge, as is weatherproofing (for high voltage). 73, Bob From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10082 invoked from network); 6 Jun 2001 17:33:56 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 6 Jun 2001 17:33:56 -0000 Received: (qmail 9788 invoked from network); 6 Jun 2001 17:33:29 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 6 Jun 2001 17:33:29 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157h5I-0006ZG-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Jun 2001 18:27:08 +0100 Received: from [204.202.140.198] (helo=webmailmta.go.com) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157h5E-0006Z8-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Jun 2001 18:27:04 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gomailjtp01 ([10.212.0.161]) by mta06.seamail.go.com (Sun Internet Mail Server sims.4.0.2000.10.12.16.25.p8) with ESMTP id <0GEI00CHRR1XNN@mta06.seamail.go.com> for rsgb_lf_group@blacksheep.org; Wed, 6 Jun 2001 10:25:09 -0700 (PDT) Date: Wed, 06 Jun 2001 10:25:11 -0700 (PDT) From: "John Sexton" Subject: Re: LF: Wire in the Air etc To: rsgb_lf_group@blacksheep.org Message-ID: <775449.991848311278.JavaMail.computernetworks@gomailjtp01> MIME-Version: 1.0 X-Mailer: GoMail 3.0.0 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: Hi All, Dick PA0SE mentioned recently that radiation from the loading coil is approximately equivalent to the radiation from a piece of wire of the same length. This must surely mean that the reduction in the size of the loading coil, when one can put more wire in the sky, does not just reduce loading coil losses resulting from the reduced RF resistance of the coil, but perhaps more importantly by moving radiated energy up and away from the earth, where it has some chance of not being absorbed by the immediate environment. If this is so then elevating the loading coil, either by putting it high up the vertical element or simply by raising it as high above the ground as possible must contribute to an improved signal. Presumably as usual this will appear as a reduction in the resistance at resonance. This I think will be my next experiment. Alternatively a longer coil should raise the high voltage part of the coil and also reduce losses. Comments? 73, John, G4CNN ___________________________________________________ GO.com Mail Get Your Free, Private E-mail at http://mail.go.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11985 invoked from network); 6 Jun 2001 11:45:50 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 6 Jun 2001 11:45:50 -0000 Received: (qmail 26441 invoked from network); 6 Jun 2001 11:45:28 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 6 Jun 2001 11:45:28 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157bWr-0003dR-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Jun 2001 12:31:13 +0100 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 #2) id 157bWn-0003dM-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Jun 2001 12:31:09 +0100 Received: from miked by rsgb.org.uk with SMTP (MDaemon.PRO.v4.0.0.R) for ; Wed, 06 Jun 2001 12:21:24 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Wed, 6 Jun 2001 12:21:22 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: Wire in the Air etc Message-ID: <3B1E2042.14234.A6BF51@localhost> In-reply-to: <3B1D896F.4EC3EA1A@ns.sympatico.ca> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-Return-Path: miked@mail X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > About antenna . I wonder if the increase in efficiancy is caused > by the higher antenna capacity which permits smaller coil and therefore > less loss due to coil resistance. This might also explain the big > signals from Jack and the OH station. I am thinking of putting up a 50 > ft vertical with a 400 ft long wire from top. How does that sound? > John VE1ZJ You will only save an ohm or two on the loading coil, whereas there is much more to be saved in the earth resistance. As with most amateur radio, the big signals have lots of wire at a good height. Your projected antenna would be the envy of most Eu operators, but if you can get it higher - even at the expense of length - it will work better. ERP is a function of effective height squared. The effective height is directly proportional to actual height, but the relationship between actual and real height is not affected much once you have a good size top section, so actual height is the most important. Of course, as Laurie has demonstrated, it also helps if you can increase the current significantly with a bigger top section, as ERP is also a function of current squared. 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 7371 invoked from network); 6 Jun 2001 08:45:53 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 6 Jun 2001 08:45:53 -0000 Received: (qmail 183 invoked from network); 6 Jun 2001 08:45:27 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 6 Jun 2001 08:45:27 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157YpM-0002Bt-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Jun 2001 09:38:08 +0100 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 #2) id 157YpH-0002Bn-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Jun 2001 09:38:03 +0100 Received: from miked by rsgb.org.uk with SMTP (MDaemon.PRO.v4.0.0.R) for ; Wed, 06 Jun 2001 09:35:10 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Wed, 6 Jun 2001 09:35:08 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: RE: Re. 73KHz T/A Message-ID: <3B1DF94C.12607.E8FD2@localhost> In-reply-to: <7D653C9C42F5D411A27C00508BF8803D55C4B6@pdw-mail-r1.dstl.gov.uk> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-Return-Path: miked@mail X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > Could this path be enhanced by the Earth / Ionosphere waveguide > propagation mode, prevalent at lower frequencies. I know it is rather too high > frequency to be normally considered for this mode, but with a D layer 'height' > of around 75km (is that right ?) the waveguide guide width is something like 8 > wavelengths so something may be feasible. > Andy G4JNT I had always understood that you needed gigantic powers to get into this mode, but once there the path losses were very small. Congratulations to Laurie and John. Are there any pictures? 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 22330 invoked from network); 6 Jun 2001 05:46:35 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 6 Jun 2001 05:46:35 -0000 Received: (qmail 28321 invoked from network); 6 Jun 2001 05:46:09 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 6 Jun 2001 05:46:09 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157Vug-0000in-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Jun 2001 06:31:26 +0100 Received: from protactinium.btinternet.com ([194.73.73.176] helo=protactinium) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157Vuf-0000ii-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Jun 2001 06:31:25 +0100 Received: from [213.123.11.91] (helo=dave) by protactinium with smtp (Exim 3.03 #83) id 157Vu2-0006J7-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Jun 2001 06:30:47 +0100 Message-ID: <000801c0ee4a$2091f1c0$5b0b7bd5@dave> From: "Dave Sergeant" To: rsgb_lf_group@blacksheep.org References: <3B1CBECE.20545.61E3BE@localhost> Subject: LF: Re: Advice to beginners Date: Wed, 6 Jun 2001 06:31:52 +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: >From Dave G3YMC Comments on remarks by Mike G3XDV and others: >Be realistic: If you have a 40m dipole, 8m above ground and strapped as a >Marconi, over poor soil, you are wasting your time with 5W. Good results will >can be had with several hundred watts - easily and cheaply obtainable with a >BK Electronics amp. It is simply not true that several hundred watts are needed to have useful results on the band. With my 35W and a loop in an impossible QTH I enjoy plenty of enjoyable contacts, and four countries and a best DX of 470km scarcely indicates I have been wasting my time. OK it is not easy - I shall shortly be experimenting with an antenna not dissimilar to what Mike describes and hope it furthers my possiblilities. >Also (those who have been on this reflector for years will remember my old >sermon) it is vital to optimise the receiver as you won't work anyone you can't >hear. I totally agree. Time and time again I am listening to a QSO and copy both sides perfectly Q5, but the two participiants seem to have great difficulty copying each others. OK differences in location and selective propogation may be the reason, but it happens too often, and usually it is obvious they have an inadequate receiver. There are still some of the active operators who have yet to get this message. >This appears to be a similar effect to that seen on HB9ASB's signals when he >was regularly active on Sunday mornings a year or two ago. Toni remains one of the most active stations on Sunday mornings - perhaps he has gone by the time most people surface. But I often experience this selective propogation and QSB at different times from others. 73s Dave G3YMC dsergeant@btinternet.com dsergeant@iee.org http://www.dsergeant.btinternet.co.uk From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26861 invoked from network); 5 Jun 2001 22:31:53 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Jun 2001 22:31:53 -0000 Received: (qmail 7782 invoked from network); 5 Jun 2001 22:31:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Jun 2001 22:31:26 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157PIC-0005hN-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 23:27:16 +0100 Received: from mail11.svr.pol.co.uk ([195.92.193.23]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157PIB-0005hI-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 23:27:15 +0100 Received: from modem-64.belegaer.dialup.pol.co.uk ([62.136.137.64] helo=g3aqc) by mail11.svr.pol.co.uk with smtp (Exim 3.13 #0) id 157PHY-0004IH-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 23:26:37 +0100 Message-ID: <001201c0ee0e$938e4020$4089883e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: Re. Wire in the Air etc. Date: Tue, 5 Jun 2001 23:25:56 +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
Hi John,
Thanks for listening, TX running now.
Re. Ant, you asked if improvement could be due to smaller loading coil. I dont think so ,total  loss is 35ohms of which coil loss is about 5ohms, so reduction of 20%  is only 1ohm not really significant. I belive the explanation is in the lossy capacitor which the ground represents, by spreading the current out over as much ground as possible these losses are reduced.(lots of lossy caps in parallel=a less lossy larger capacitor.)Point is it works. Of course some ground is more lossy than other ground I belive my Clay is very bad,perhaps on good ground this effect would not be so well marked.
You Ant. proposal seems good ,the 400 ft top will ensure almost  linear current in the vert. section and since it covers a lot of ground should result in reasonably low ground loss,in fact it will probably be better than the Ant. I am currently using since the wire is in a straight line. Hope you see something tonight.
73s  Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19752 invoked from network); 5 Jun 2001 21:42:45 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Jun 2001 21:42:45 -0000 Received: (qmail 17897 invoked from network); 5 Jun 2001 21:41:55 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Jun 2001 21:41:55 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157OTQ-0005J1-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 22:34:48 +0100 Received: from jubilee.ns.sympatico.ca ([142.177.1.6] helo=mail-ns00s0.ns.sympatico.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157OTM-0005Iu-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 22:34:44 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.87.163]) by mail-ns00s0.ns.sympatico.ca (Post.Office MTA v3.5.3 release 223 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Tue, 5 Jun 2001 18:33:18 -0300 Message-ID: <3B1D896F.4EC3EA1A@ns.sympatico.ca> Date: Tue, 05 Jun 2001 21:37:51 -0400 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: Wire in the Air etc References: <001d01c0edd4$4b924260$d294883e@g3aqc> 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 Hi Laurie ,  First I'll belistening tonihgt es tmw night
 
       About antenna .  I wonder if the increase in efficiancy is caused by the higher antenna capacity which permits smaller coil and therefore less loss due to coil resistance.  This might also explain the big signals from  Jack and the OH station.  I am thinking of putting up a 50 ft vertical with a 400 ft long wire from top.   How does that sound?
       CU tonight 73 de John VE1ZJ

Laurie Mayhead wrote:

Hi Tom / John,Most of the wire is in one length although it zig zags to get it into available space ,looks like a letter  N  with the vert. section connected to the top of the RH vert stroke.There is a short, 80ft peice of wire also connected here which goes off at the same angle as the cross stroke of the N. This seems to have a greater effect in increasing the Ant. capacitance than it does in reducing the R.res but then it is pretty short.To answer Johns question yes, the Ant. cap is increased by the new section. The loading coil inductance dropping from 1.8mH to 1.35mH.73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7482 invoked from network); 5 Jun 2001 20:50:22 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Jun 2001 20:50:22 -0000 Received: (qmail 20347 invoked from network); 5 Jun 2001 20:49:56 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Jun 2001 20:49:56 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157Nh3-0004u6-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 21:44:49 +0100 X-MSMail-Priority: Normal Received: from anchor-post-33.mail.demon.net ([194.217.242.91]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157Nh1-0004u1-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 21:44:48 +0100 Received: from alg.demon.co.uk ([194.222.171.80]) by anchor-post-33.mail.demon.net with esmtp (Exim 2.12 #1) id 157NhZ-0000Zi-0X for rsgb_lf_group@blacksheep.org; Tue, 5 Jun 2001 21:45:21 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B1D45B3.A6B1B216@alg.demon.co.uk> Date: Tue, 05 Jun 2001 21:48:51 +0100 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: Advice to beginners References: <3B1CBECE.20545.61E3BE@localhost> 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, My thanks to Mike G3XDV for providing some good advice for beginners - I think that we have the first draft of an 'LF Elmer's Handbook' contained within Mike's recent Email! Mike also wrote: > If I had been restricted to 5W in my early days I would have given up long ago, > and I am sure that Steve would have done so, too. I'm sorry if I conveyed an impression of 'restriction' in my earlier Email. What I really wanted to demonstrate was that newcomers to 136 kHz could use QRP as an 'entry level' stepping stone to this fascinating band. Let's go back to mid-March 1998, and consider my own experience. Using a less-than-optimum receive set-up, GW0GHF (42 km) was the first station to hear my 15 W signal on 136 kHz. At the time, I was using a very poor single-turn loop antenna: tuned by very lossy capacitors; and fed by a very lossy balun (wound on an EMC-grade toroidal core). By the following week, I had completed my first QSO with Graham G3XTZ over a distance of 157 km: with me still plugging away with my 15 W into that same loop - fed by a rather warm matching network! For me, that QSO was my stepping stone. > Be realistic: If you have a 40m dipole, 8m above ground and strapped as a > Marconi, over poor soil, you are wasting your time with 5W. Wow! I wish I had such a big antenna! I wonder how it would perform against my 12 m vertical (with no top loading)? Seriously though, 5 watts into a small antenna can still make quite an effective set-up for those first LF QSOs across town. I trust that I have proved this to be the case. I'll leave it to others to decide whether I was wasting my time. Regards to all, Steve GW4ALG From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1365 invoked from network); 5 Jun 2001 20:25:08 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Jun 2001 20:25:08 -0000 Received: (qmail 16937 invoked from network); 5 Jun 2001 20:24:42 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Jun 2001 20:24:42 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157NEZ-0004fD-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 21:15:23 +0100 Received: from larry.euronet.nl ([194.134.35.138] helo=smtp.wanadoo.nl) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157NEV-0004f8-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 21:15:19 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from default (p0765.vcu.wanadoo.nl [194.134.202.2]) by smtp.wanadoo.nl (8.11.3/8.11.3) with SMTP id f55KEdN15722 for ; Tue, 5 Jun 2001 22:14:39 +0200 (MEST) Message-ID: <200106052014.f55KEdN15722@smtp.wanadoo.nl> Date: Tue, 5 Jun 2001 22:14:43 +0100 From: "Ko Versteeg" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re. 73KHz tests X-Mailer: FoxMail 2.1 [en] MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from 8bit to quoted-printable by smtp.wanadoo.nl id f55KEdN15722 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: At 6/5/01 13:23:00, you wrote: >Hi Peter, >I dont think Ko's findings are too far out. Please forget my mistake, R.res calculated should read 0.02 ohms. If we take your estimated Rad.pwr of 23.2 mW and increase it by 8db (x6.31) this gives 146.4mW which is not too far from my estimated 125mW.The d >ifference ,assuming Ko's figure is correct, is either your ERP is a bit down on your Rad.pwr which seems most likely,or my 125mW ERP should be a bit higher.I am assuming the same local losses as on 136 in calculating this figure.I hav'nt been out to check > it yet. Either way they tie up quite well in the imperfect world we operate in,and thanks Ko for the comparison. 73s Laurie. > Peter, Laurie.. For 73 i used,- Antenna: Chelcom Hf-v1. [ ¼Wave helical for 80m ] Pre-amp: 28dB. Filter: 25Hz. Hope to see some more on Friday and Saturday night, can't make it any other night :-( 73 de Ko, NL9222. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9006 invoked from network); 5 Jun 2001 18:03:24 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 5 Jun 2001 18:03:24 -0000 Received: (qmail 7983 invoked from network); 5 Jun 2001 18:02:55 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 5 Jun 2001 18:02:55 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157L0a-0003SL-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 18:52:48 +0100 Received: from [204.202.140.198] (helo=webmailmta.go.com) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157L0X-0003SG-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 18:52:45 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gomailjtp01 ([10.212.0.161]) by mta06.seamail.go.com (Sun Internet Mail Server sims.4.0.2000.10.12.16.25.p8) with ESMTP id <0GEG00AFRXFI4V@mta06.seamail.go.com> for rsgb_lf_group@blacksheep.org; Tue, 5 Jun 2001 10:47:42 -0700 (PDT) Date: Tue, 05 Jun 2001 10:47:44 -0700 (PDT) From: "John Sexton" Subject: Re: Re: LF: Re: "Ground" losses To: rsgb_lf_group@blacksheep.org Message-ID: <2085457.991763264603.JavaMail.computernetworks@gomailjtp01> MIME-Version: 1.0 X-Mailer: GoMail 3.0.0 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: Hi John and Paul, I use a version of the KI0LE loop for receive. There is a continuous buzz on the vertical from some local power lines probably under the site here, which makes it very poor for receive. The loop is very much amongst the bushes and only a few feet off the ground, yet its reception is outstanding. The most important thing I found was to get it as far away from the house as possible. 73, John, G4CNN -----Original Message----- From: WarmSpgs@aol.com To: rsgb_lf_group@blacksheep.org Date: Mon Jun 04 14:13:27 PDT 2001 Subject: Re: LF: Re: "Ground" losses >In a message dated 6/4/01 4:26:52 PM Eastern Daylight Time, paulc@snet.net >writes: > ><< I have a location on my property where I could run a flat top antenna >of perhaps 70 to 80 feet high with a top hat made of parallel wires at least >200 feet long. > >I have a tower on my property that is 130' high and could attache to that >with the proper insulator if I did not mind the tophat sloping from 130' to >around 80 feet. > >Trees would be about 75 feet away in any direction ... > >Your thought? >> > >Seeing that we presently have no legal provision stateside for transmitting >into antennas of those dimensions, I have to assume you are speaking of >receiving. Ground system losses are less of a factor for receiving, >depending on the type of input your receiver has or what sort of antenna >tuner you are using with it. Proximity to trees is not ideal even for >receiving at LF, but 75 feet or so should be acceptable. Receiving loops >would be still better, though. > >John KD4IDY > > > ___________________________________________________ GO.com Mail Get Your Free, Private E-mail at http://mail.go.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29482 invoked from network); 5 Jun 2001 15:43:52 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Jun 2001 15:43:52 -0000 Received: (qmail 8397 invoked from network); 5 Jun 2001 15:43:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Jun 2001 15:43:26 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157Imf-0002EU-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 16:30:17 +0100 Received: from cmailg5.svr.pol.co.uk ([195.92.195.175]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157ImX-0002EI-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 16:30:09 +0100 Received: from modem-82.curufin.dialup.pol.co.uk ([62.136.148.210] helo=g3aqc) by cmailg5.svr.pol.co.uk with smtp (Exim 3.13 #0) id 157Ilr-0008MI-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 16:29:28 +0100 Message-ID: <001e01c0edd4$4caf9940$d294883e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: Re. 73KHz tests Date: Tue, 5 Jun 2001 16:28:19 +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
Hi John,
Sorry nothing seen last night. I am quite keen to confirm the other nights sighting so will transmit again tonight. Freq. confirmed as 71,921.5KHz. shift now a little greater at 0.1hz
DFCW of course using 30sec dot length.Thanks for looking.
73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28783 invoked from network); 5 Jun 2001 15:42:51 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 5 Jun 2001 15:42:51 -0000 Received: (qmail 10015 invoked from network); 5 Jun 2001 15:42:28 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 5 Jun 2001 15:42:28 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157Ima-0002ER-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 16:30:12 +0100 Received: from cmailg5.svr.pol.co.uk ([195.92.195.175]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157ImV-0002EH-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 16:30:07 +0100 Received: from modem-82.curufin.dialup.pol.co.uk ([62.136.148.210] helo=g3aqc) by cmailg5.svr.pol.co.uk with smtp (Exim 3.13 #0) id 157Ilp-0008MI-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 16:29:26 +0100 Message-ID: <001d01c0edd4$4b924260$d294883e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: Wire in the Air etc Date: Tue, 5 Jun 2001 16:23:40 +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
Hi Tom / John,
Most of the wire is in one length although it zig zags to get it into available space ,looks like a letter  N  with the vert. section connected to the top of the RH vert stroke.There is a short, 80ft peice of wire also connected here which goes off at the same angle as the cross stroke of the N. This seems to have a greater effect in increasing the Ant. capacitance than it does in reducing the R.res but then it is pretty short.To answer Johns question yes, the Ant. cap is increased by the new section. The loading coil inductance dropping from 1.8mH to 1.35mH.
73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28065 invoked from network); 5 Jun 2001 14:47:54 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 5 Jun 2001 14:47:54 -0000 Received: (qmail 17450 invoked from network); 5 Jun 2001 14:47:29 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 5 Jun 2001 14:47:29 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157HyV-0001oo-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 15:38:27 +0100 Received: from jubilee.ns.sympatico.ca ([142.177.1.6] helo=mail-ns00s0.ns.sympatico.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157HyR-0001oj-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 15:38:23 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.104.58]) by mail-ns00s0.ns.sympatico.ca (Post.Office MTA v3.5.3 release 223 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Tue, 5 Jun 2001 11:36:45 -0300 Message-ID: <3B1CA90B.536574A2@ns.sympatico.ca> Date: Tue, 05 Jun 2001 02:40:28 -0700 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: Wire in the Air more info. References: <002801c0edbe$a5096780$b428893e@g3aqc> 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 Hi Laurie,   About your antenna .  Did you find that the extra wire allowed you to reduce your loading coil?  I am thinking about Big Pond again.

        I looked at my computer last night .  I couldn't find any images .  I probably didn't bother because I thought the frequencey was wrong,sri
         Saw nil last night I will look again tonight if you or Peter will tranamit, or anyone else for that matter .  Again I will be using 30 sec dots so all should be between 91.920 and 71.926 kHz  73 de John VE1ZJ

Laurie Mayhead wrote:

During the T/A tests last winter I ran out 2 additional radials 150 ft. long  into the sea water with 4ft long earth rods. Recently the grass had to be cut so I brought these radial in,carefully checking the Ant. current with and without the radials. NO DIFF!This brought me back to the" wire in the air theory" and I did somthing that I have been planning for some time. I added an extra 180 ft in the zig-zag configuration,in spite of the fact that Eznec recons that my top load is long enough to have linear current in the vert. section,and  no improvement to be gained from the additional wire in the air.(Rad. res. only increasing from 0.069-0.070ohms).   But Eznec doesnt adequately simulate currents in the ground at these frequencies. So I checked the Ant. current before and after. Before 3.2A after 3.7 Amps!!!Very worth while,and once again "Wire in the Air" is vastly superior to wire in the ground.,at my location at least. My 350mwERP is now 450mw ERP.Antenna now  48ft high, vert section 42ft from top of loading coil. Horizontal top 650 ft (apart from last 180 ft which slopes to 40 ft.Top wires in zig zag config.  73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21030 invoked from network); 5 Jun 2001 14:27:50 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 5 Jun 2001 14:27:50 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 27956 invoked from network); 5 Jun 2001 14:26:58 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 5 Jun 2001 14:26:58 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157Hij-0001h5-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 15:22:09 +0100 Received: from anchor-post-34.mail.demon.net ([194.217.242.92]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157Hif-0001h0-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 15:22:05 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from telemetry.demon.co.uk ([194.222.19.114]) by anchor-post-34.mail.demon.net with smtp (Exim 2.12 #1) id 157Hi3-000BLd-0Y for rsgb_lf_group@blacksheep.org; Tue, 5 Jun 2001 15:21:28 +0100 Message-ID: Date: Tue, 5 Jun 2001 14:11:22 +0100 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: Re: LF: Wire in the Air more info. In-reply-to: <002801c0edbe$a5096780$b428893e@g3aqc> 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: Laurie G3AQC wrote: >"......Antenna now 48ft high, vert section 42ft from top of loading coil. Horizontal >top 650 ft (apart from last 180 ft which slopes to 40 ft.>Top wires in zig zag config. 73s Laurie." Laurie, is your top section 650' in one section or are there several sections in parallel, i.e. like a T (if you follow me)? 73, Tom G3OLB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20814 invoked from network); 5 Jun 2001 14:12:58 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Jun 2001 14:12:58 -0000 Received: (qmail 29308 invoked from network); 5 Jun 2001 14:12:32 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Jun 2001 14:12:32 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157HQF-0001Z7-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 15:03:03 +0100 Received: from mta01-svc.ntlworld.com ([62.253.162.41]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157HQC-0001Z2-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 15:03:00 +0100 Received: from compaq ([62.253.48.177]) by mta01-svc.ntlworld.com (InterMail vM.4.01.02.27 201-229-119-110) with SMTP id <20010605140222.CFQJ283.mta01-svc.ntlworld.com@compaq> for ; Tue, 5 Jun 2001 15:02:22 +0100 Message-ID: <003c01c0edc8$250e2520$b130fd3e@compaq> From: "Tracey Gardner" To: "RSGB LF Group" Subject: LF: Fw: [WUN] All of you Lowfers and your request for information on GBR Date: Tue, 5 Jun 2001 15:02:22 +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: -----Original Message----- From: Eric Earl To: wun@qth.net Date: 05 June 2001 14:58 Subject: [WUN] All of you Lowfers and your request for information on GBR > > >Gentlemen/Ladies > >My son is a sub commander in the Canadian Navy. I asked him if he would look >into Costa's request for QSL information some time ago on the special VLF >xmission. Here is his reply. Hope this is of use to you all. > >Best Regards, Eric // Atlanta, Georgia > >== > > > >Dad, > >As requested I've done some investigation for you regarding a QSL card. As >you may or may not know GBR is a series of radio stations operated by >British Telecom? This station normally transmits encrypted MSK originating >from Northwood (the controlling authority) to surface and sub-surface NATO >units operating in the Eastern Atlantic. Anyway, at the request of MoD on >29 May 01 they interrupted their usual transmission for about 4 hours to >transmit the submarine centenary message you passed to me. > >The radio station that actually originated the transmission is located in >Rugby. Yes, the place where the game originated. I've contacted the >station manager, Mr. Malcolm Hancock and he indicated that they are >currently looking into producing QSL cards for the transmission. Should you >or any of your colleagues like to request one, a request can be sent to: > >Mr. Malcolm Hancock >BTRS Rugby >Hillmorton, Rugby >United Kingdom >CV23 0AS > >Additionally, should you need to give him a call he can be contacted at: >(44) 1788 545 086. Hope this helps. > > >-- >The Worldwide UTE News (WUN) mailing list. WUN is a non-profit, >dues-free club established in 1995 to share information on shortwave >utilities. For more information: http://www.wunclub.com. Write to >listmaster@wunclub.com if you need assistance with the mailing list. > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3683 invoked from network); 5 Jun 2001 13:03:06 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 5 Jun 2001 13:03:06 -0000 Received: (qmail 10170 invoked from network); 5 Jun 2001 13:02:42 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 5 Jun 2001 13:02:42 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157GMW-0000vG-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 13:55:08 +0100 Received: from cmailg2.svr.pol.co.uk ([195.92.195.172]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157GMU-0000vB-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 13:55:06 +0100 Received: from modem-94.ar-gimilzor.dialup.pol.co.uk ([62.136.123.222] helo=g3aqc) by cmailg2.svr.pol.co.uk with smtp (Exim 3.13 #0) id 157GLr-0005Me-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 13:54:28 +0100 Message-ID: <002801c0edbe$a5096780$b428893e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: Wire in the Air more info. Date: Tue, 5 Jun 2001 13:53:45 +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
During the T/A tests last winter I ran out 2 additional radials 150 ft. long  into the sea water with 4ft long earth rods. Recently the grass had to be cut so I brought these radial in,carefully checking the Ant. current with and without the radials. NO DIFF!
This brought me back to the" wire in the air theory" and I did somthing that I have been planning for some time. I added an extra 180 ft in the zig-zag configuration,in spite of the fact that Eznec recons that my top load is long enough to have linear current in the vert. section,and  no improvement to be gained from the additional wire in the air.(Rad. res. only increasing from 0.069-0.070ohms).   But Eznec doesnt adequately simulate currents in the ground at these frequencies. So I checked the Ant. current before and after. Before 3.2A after 3.7 Amps!!!
Very worth while,and once again "Wire in the Air" is vastly superior to wire in the ground.,at my location at least. My 350mw
ERP is now 450mw ERP.
Antenna now  48ft high, vert section 42ft from top of loading coil. Horizontal top 650 ft (apart from last 180 ft which slopes to 40 ft.
Top wires in zig zag config.  73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23438 invoked from network); 5 Jun 2001 12:39:09 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 5 Jun 2001 12:39:09 -0000 Received: (qmail 19040 invoked from network); 5 Jun 2001 12:38:45 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 5 Jun 2001 12:38:45 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157FzU-0000gB-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 13:31:20 +0100 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157FzS-0000g6-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 13:31:18 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id NAA32766; Tue, 5 Jun 2001 13:35:18 +0100 (BST) Received: (qmail 11386 invoked from network); 5 Jun 2001 13:24:21 -0000 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 5 Jun 2001 13:24:21 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: by gauntlet.mail.dera.gov.uk; id NAA04455; Tue, 5 Jun 2001 13:16:38 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma004019; Tue, 5 Jun 01 13:15:28 GMT Received: from mailex.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with SMTP id for ; Tue, 5 Jun 2001 13:38:14 +0100 Received: (qmail 1138 invoked from network); 5 Jun 2001 12:20:29 +0100 Received: from softdnserror (HELO cchecker.dstl.gov.uk) (192.168.248.52) by mailex.dstl.gov.uk with SMTP; 5 Jun 2001 11:20:29 -0000 Received: from FRN-MAIL-R1.dstl.gov.uk (unverified) by cchecker.dstl.gov.uk (Content Technologies SMTPRS 4.1.2) with ESMTP id for ; Tue, 5 Jun 2001 12:20:31 +0100 Received: by frn-mail-r1.dstl.gov.uk with Internet Mail Service (5.5.2650.21) id ; Tue, 5 Jun 2001 13:28:45 +0100 Message-ID: <7D653C9C42F5D411A27C00508BF8803D55C4B6@pdw-mail-r1.dstl.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: Re. 73KHz T/A Date: Tue, 5 Jun 2001 13:28:48 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) 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: Could this path be enhanced by the Earth / Ionosphere waveguide propagation mode, prevalent at lower frequencies. I know it is rather too high frequency to be normally considered for this mode, but with a D layer 'height' of around 75km (is that right ?) the waveguide guide width is something like 8 wavelengths so something may be feasible. Just a thought Andy G4JNT > Assuming Laurie and John's reports check out OK, this will be > something quite extraordinary. Given the noise level on 73k, and > the reduced ERP available on the band, propagation losses would > have to be very much less than on 136k - I wonder what 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 7 invoked from network); 5 Jun 2001 12:38:08 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Jun 2001 12:38:08 -0000 Received: (qmail 19065 invoked from network); 5 Jun 2001 12:37:18 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Jun 2001 12:37:18 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157Fv7-0000fV-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 13:26:49 +0100 Received: from cmailg6.svr.pol.co.uk ([195.92.195.176]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157Fv5-0000fQ-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 13:26:47 +0100 Received: from modem-52.monkeyface-eel.dialup.pol.co.uk ([62.137.40.180] helo=g3aqc) by cmailg6.svr.pol.co.uk with smtp (Exim 3.13 #0) id 157FuT-0005lX-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 13:26:09 +0100 Message-ID: <001d01c0edba$b0acf9c0$b428893e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: Re. 73KHz tests Date: Tue, 5 Jun 2001 13:23:51 +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
Hi Peter,
I dont think Ko's findings are too far out. Please forget my mistake, R.res calculated should read 0.02 ohms. If we take your estimated Rad.pwr of 23.2 mW and increase it by 8db (x6.31) this gives 146.4mW which is not too far from my estimated 125mW.The difference ,assuming Ko's figure is correct, is either your ERP is a bit down on your Rad.pwr which seems most likely,or my 125mW ERP should be a bit higher.I am assuming the same local losses as on 136 in calculating this figure.I hav'nt been out to check it yet. Either way they tie up quite well in the imperfect world we operate in,and thanks Ko for the comparison.  73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12943 invoked from network); 5 Jun 2001 11:52:53 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 5 Jun 2001 11:52:53 -0000 Received: (qmail 18904 invoked from network); 5 Jun 2001 11:52:29 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 5 Jun 2001 11:52:29 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157FHo-0000N1-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 12:46:12 +0100 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 #2) id 157FHn-0000Mw-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 12:46:11 +0100 Received: from miked by rsgb.org.uk with SMTP (MDaemon.PRO.v4.0.0.R) for ; Tue, 05 Jun 2001 12:32:01 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Tue, 5 Jun 2001 12:31:57 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: New (to me) DL call Message-ID: <3B1CD13D.21839.A9E7FB@localhost> In-reply-to: <4836017.991678503153.JavaMail.computernetworks@gomailjtp01> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-Return-Path: miked@mail X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > Yes I heard this station today, but thought at first, that I had mistaken the > call. I heard him first, like you, working Christer, whom I could hear actually > and later working F6CNI, first in easy to read slow morse and then rather too > fast for me. We have seen this before where you hear something that I don't and > vice versa. There must be some element of skywave to explain this surely? Cheers > John. This appears to be a similar effect to that seen on HB9ASB's signals when he was regularly active on Sunday mornings a year or two ago. He would often be strong with one G station, but weak with another, then the situation would reverse perhaps an hour later. We put it down to the sky wave changing and alternately cancelling and enhancing the ground wave. 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 23112 invoked from network); 5 Jun 2001 11:52:26 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 5 Jun 2001 11:52:26 -0000 Received: (qmail 18273 invoked from network); 5 Jun 2001 11:51:34 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 5 Jun 2001 11:51:34 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157FFx-0000Mm-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 12:44:17 +0100 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157FFt-0000Mh-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 12:44:13 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id MAA25404; Tue, 5 Jun 2001 12:48:12 +0100 (BST) Received: (qmail 4827 invoked from network); 5 Jun 2001 12:37:15 -0000 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 5 Jun 2001 12:37:15 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: by gauntlet.mail.dera.gov.uk; id MAA18678; Tue, 5 Jun 2001 12:29:31 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma018450; Tue, 5 Jun 01 12:28:47 GMT Received: from mailex.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with SMTP id for ; Tue, 5 Jun 2001 12:51:31 +0100 Received: (qmail 8966 invoked from network); 5 Jun 2001 11:33:46 +0100 Received: from softdnserror (HELO cchecker.dstl.gov.uk) (192.168.248.52) by mailex.dstl.gov.uk with SMTP; 5 Jun 2001 10:33:46 -0000 Received: from FRN-MAIL-R1.dstl.gov.uk (unverified) by cchecker.dstl.gov.uk (Content Technologies SMTPRS 4.1.2) with ESMTP id for ; Tue, 5 Jun 2001 11:33:48 +0100 Received: by frn-mail-r1.dstl.gov.uk with Internet Mail Service (5.5.2650.21) id ; Tue, 5 Jun 2001 12:42:02 +0100 Message-ID: <7D653C9C42F5D411A27C00508BF8803D55C4B5@pdw-mail-r1.dstl.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: RE: LF: QRP Date: Tue, 5 Jun 2001 12:42:06 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) 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: About this time last year I seem to remember sending some narrow bandwidth SMT Hell sigs at powers of a Watt or so. With the QRP discussion going on recently, is anyone interested if I set up this beacon transmission again ? ERP about 0.2uW. Andy G4JNT > -----Original Message----- > From: Tom Boucher [mailto:tom@telemetry.demon.co.uk] > Sent: 2001-06-05 09:49 > To: rsgb_lf_group@blacksheep.org > Subject: Re: LF: e-QSL > > > Steve > > Care to try a QSO at 1 watt? I gave you an un-measured > 'audio' report of > 569 with 5 watts, so I should read you 559 at -7dB less. > > 300 mW (-12dB wrt 5W) should give me a strength 4 signal. > > Will be home again as from Wednesday night. > > 73, Tom G3OLB > > -- 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 1338 invoked from network); 5 Jun 2001 11:26:29 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 5 Jun 2001 11:26:29 -0000 Received: (qmail 152 invoked from network); 5 Jun 2001 11:26:05 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 5 Jun 2001 11:26:05 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157Ert-00006q-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 12:19:25 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157Erp-00006i-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 12:19:21 +0100 Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 157ErD-0001jk-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 12:18:43 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.232.252] (helo=mj9ar) by gemini.herts.ac.uk with smtp (Exim 3.22 #2) id 157ErD-0003rp-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 12:18:43 +0100 From: "James Moritz" Organization: University of Hertfordshire To: rsgb_lf_group@blacksheep.org Date: Tue, 5 Jun 2001 12:19:41 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: Re. 73KHz T/A In-reply-to: <3B1B6154.3070DC31@ns.sympatico.ca> X-Mailer: Pegasus Mail for Win32 (v3.11) Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear Laurie, John, LF Group, Well ... I leave town for a couple of days and it all starts happening! Assuming Laurie and John's reports check out OK, this will be something quite extraordinary. Given the noise level on 73k, and the reduced ERP available on the band, propagation losses would have to be very much less than on 136k - I wonder what the pundits make of this? I saw Laurie's signal when checking 73 kHz last night, without having read the E-mails on the topic from the previous couple of days, so it took quite a while to figure out what it was - the frequency shift was very small, only about 0.06Hz. Laurie has probably the strongest signal on 73k at the moment, about 579 with me, but much lower SNR than on 136kHz. I would be very interested to hear from John what the band conditions are like in Canada - here, the QRN seems to drown out even the Rugby sidebands at night, although it can still be quite quiet at times during the day. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4156 invoked from network); 5 Jun 2001 10:25:54 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Jun 2001 10:25:54 -0000 Received: (qmail 7665 invoked from network); 5 Jun 2001 10:25:28 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Jun 2001 10:25:28 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157DtN-00085p-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 11:16:53 +0100 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 #2) id 157DtL-00085k-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 11:16:52 +0100 Received: from miked by rsgb.org.uk with SMTP (MDaemon.PRO.v4.0.0.R) for ; Tue, 05 Jun 2001 11:13:19 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Tue, 5 Jun 2001 11:13:18 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: Advice to beginners Message-ID: <3B1CBECE.20545.61E3BE@localhost> In-reply-to: <3B1A5014.138FAA12@alg.demon.co.uk> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-Return-Path: miked@mail X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > I believe that a simple low power transmitter for 136 kHz would > make an excellent club project, with the very real prospect of > not just making LF QSOs across town - but with other countries > too! > Regards to all, > Steve GW4ALG Whilst it is a great idea to interest clubs in such a project, beware of using low power into a non-optimised antenna. If I had been restricted to 5W in my early days I would have given up long ago, and I am sure that Steve would have done so, too. I could certainly use QRP now as my antenna is so much better. Any newcomers expecting to do well with 5W =must= be given proper advice on antennas. For instance: Insulate very well indeed. Keep well away from absorbing things like trees. Optimise tuning and matching. Spend some time on earthing. Antenna current multiplied by =effective= height is the thing to improve. Be realistic: If you have a 40m dipole, 8m above ground and strapped as a Marconi, over poor soil, you are wasting your time with 5W. Good results will can be had with several hundred watts - easily and cheaply obtainable with a BK Electronics amp. Also (those who have been on this reflector for years will remember my old sermon) it is vital to optimise the receiver as you won't work anyone you can't hear. This involves: Good gain distribution. Keep receive antennas away from local noise sources. Trace any permanent noise and fix it (for instance, LF radiation from my big TV was cured by adding a few pF in series with each leg of the antenna coax close to the set). Be aware of possible intermod (for instance check 138kHz for a pulsed tone caused by a mix in your receiver between 60kHz Rugby and 198kHz BBC) and fix it. Perhaps use a directional antenna or noise cancellation. Enough gain to be able to hear right down into the noise (an IC706 will hear signals but needs a pre-amp to be effective). Does anyone else have tips for beginners? 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 15826 invoked from network); 5 Jun 2001 09:57:38 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Jun 2001 09:57:38 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 9838 invoked from network); 5 Jun 2001 09:57:12 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Jun 2001 09:57:12 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157DUA-0007qC-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 10:50:50 +0100 Received: from finch-post-10.mail.demon.net ([194.217.242.38]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157DU6-0007q7-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 10:50:46 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from telemetry.demon.co.uk ([194.222.19.114]) by finch-post-10.mail.demon.net with smtp (Exim 2.12 #1) id 157DTP-000O6h-0A for rsgb_lf_group@blacksheep.org; Tue, 5 Jun 2001 09:50:04 +0000 Message-ID: <36nXLHAL0JH7MwoE@telemetry.demon.co.uk> Date: Tue, 5 Jun 2001 09:49:15 +0100 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: Re: LF: e-QSL In-reply-to: <3B1C83F8.B9B9A1B9@alg.demon.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: Steve Care to try a QSO at 1 watt? I gave you an un-measured 'audio' report of 569 with 5 watts, so I should read you 559 at -7dB less. 300 mW (-12dB wrt 5W) should give me a strength 4 signal. Will be home again as from Wednesday night. 73, Tom G3OLB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7098 invoked from network); 5 Jun 2001 09:23:54 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 5 Jun 2001 09:23:54 -0000 Received: (qmail 21891 invoked from network); 5 Jun 2001 09:23:01 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 5 Jun 2001 09:23:01 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157CrK-0007Ug-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 10:10:42 +0100 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 #2) id 157CrH-0007Ub-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 10:10:39 +0100 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 JAA137626 for ; Tue, 5 Jun 2001 09:51:40 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (ss8.bld.socks.ibm.com [9.14.4.73]) by d06relay02.portsmouth.uk.ibm.com (8.8.8m3/NCO v4.96) with ESMTP id KAA104974 for ; Tue, 5 Jun 2001 10:09:04 +0100 Message-ID: <3B1CA1BE.41DE7F9B@usa.net> Date: Tue, 05 Jun 2001 11:09:18 +0200 From: "Alberto di Bene" 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: TS-950SDX : good for LF ? 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: Graham Phillips wrote: > Hi David / Alberto, > > I did use my TS950SD on 136 kHz, although I have pensioned it off at present > with a move to the FT1000MP. Note that it is an SD and not the latter SDX > model. I did not make any modifications to front-end filters, but after > using Dave's TS850 on our GU expedition, noticed that it was rather deaf in > comparison. If it would be helpful, I would be pleased to blow the dust off > and check it's sensitivity on a sig-gen. > [...] Hello Graham and David, thanks for your messages. Graham, you confirm my first impression, that my previous TS850 was quite more sensitive on LF... There is no need you measure its sensitivity, thanks anyway. What however you could do for me, if you have time, is to check the schematic to see if there are significative differences wrt the TS850 in the front-end filters. I bought it second-hand, and unfortunately the schematic diagrams were missing. My hope is that there is an attenuator, similar to that present in the 490 - 1600 kHz band, also in the lower band. Were this the case, my soldering iron is impatient to come into play :-) TNX es 73 de Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16071 invoked from network); 5 Jun 2001 07:18:49 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 5 Jun 2001 07:18:49 -0000 Received: (qmail 27094 invoked from network); 5 Jun 2001 07:18:27 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Jun 2001 07:18:27 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 157An2-0006Q5-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 07:58:08 +0100 X-MSMail-Priority: Normal Received: from finch-post-11.mail.demon.net ([194.217.242.39]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 157An1-0006Q0-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 07:58:07 +0100 Received: from alg.demon.co.uk ([194.222.171.80]) by finch-post-11.mail.demon.net with esmtp (Exim 2.12 #1) id 157AmP-000DPq-0B for rsgb_lf_group@blacksheep.org; Tue, 5 Jun 2001 06:57:30 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B1C83F8.B9B9A1B9@alg.demon.co.uk> Date: Tue, 05 Jun 2001 08:02:16 +0100 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: e-QSL References: <3B1B97DF.17170.119E934@localhost> 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: Mike G3XDV wrote: > > > Comments: Congratulations Steve on an excellent 5 watt QRP signal and > > your first LF/QRP QSO! > > Nice one, Steve. It is just this sort of initiative that will encourage a > little more on-air activity. Thanks for that, Mike. Yes, I think that newcomers could learn a lot about building an LF station by starting off with QRP. To help newcomers make such a start, I'll get the circuit diagram of my QRP TX up on my web site at the weekend, and try to maintain a small stock of the main parts - especially the 3C85 toroids. Of course, newcomers would need a local 'Elmer' to help them get started; to provide signal reports; and, perhaps, be a QSO partner for their first QSO. So I propose to add another page to my web site giving the contact details of those who would be willing to act as Elmers. Those who would like to be added to that list would be welcome to Email me (direct) with their contact information. Regards to all, Steve GW4ALG steve@alg.demon.co.uk From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2163 invoked from network); 5 Jun 2001 03:35:21 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Jun 2001 03:35:21 -0000 Received: (qmail 22158 invoked from network); 5 Jun 2001 03:34:56 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Jun 2001 03:34:56 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 1577XM-0004wB-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 04:29:44 +0100 Received: from imo-r04.mx.aol.com ([152.163.225.100]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 1577XL-0004w6-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 04:29:43 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from WarmSpgs@aol.com by imo-r04.mx.aol.com (mail_out_v30.22.) id l.90.155b2ab9 (25305) for ; Mon, 4 Jun 2001 23:29:01 -0400 (EDT) From: WarmSpgs@aol.com Message-ID: <90.155b2ab9.284dabfd@aol.com> Date: Mon, 4 Jun 2001 23:29:01 EDT Subject: Re: LF: Re: "Ground" losses 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 6/4/01 6:31:13 PM Eastern Daylight Time, paulc@snet.net writes: << This post was in anticipation of getting the band stateside.. I agree.. for receive I would use multiturn loops or a Flag antenna. So I was wonder how well something like this would work for Xmit >> Ah, hope springs eternal... :-) Antennas similar in configuration, if not size, have been successful at LowFER beacons, but not very many top-loaded ones have been that successful near trees. It does make losses more manageable to have the loading inductor near the top, as the guys mentioned earlier; but being a full near-field boundary distance from trees is desirable if it can be done (wavelength divided by 2*Pi). Whereas many hams on the eastern side of the Atlantic are allowed to pump massive quantities of power into a lossy antenna to achieve 1W ERP, if necessary, we will be limited to 200W TPO. Antenna efficiency will be the order of the day over here, I suspect. 73, John Davis From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7007 invoked from network); 4 Jun 2001 23:20:01 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 4 Jun 2001 23:20:01 -0000 Received: (qmail 12485 invoked from network); 4 Jun 2001 23:19:35 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 4 Jun 2001 23:19:35 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 1573ZI-0002v6-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 00:15:28 +0100 Received: from latimer.mail.uk.easynet.net ([195.40.1.40]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 1573ZH-0002v1-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 00:15:27 +0100 Received: from ericadodd (tnt-18-122.easynet.co.uk [212.134.224.122]) by latimer.mail.uk.easynet.net (Postfix) with SMTP id EEB28536D8 for ; Tue, 5 Jun 2001 00:14:45 +0100 (BST) Message-ID: <000201c0ed4c$cd50dce0$7ae086d4@ericadodd> From: "g3ldo" To: rsgb_lf_group@blacksheep.org References: <002301c0ecd6$5f5d9960$ed25893e@g3aqc> Subject: LF: Re: Re. 73KHz tests Date: Mon, 4 Jun 2001 11:35:49 +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 5.50.4522.1200 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: Laurie said: >Thanks Ko for the report.glad you saw us. Yes, Ko's report was very useful. From his field strength readings we should be able to make some good estimates of relative transmitted power. Laurie and I only live a few km apart and we are both located close to the sea. >Thanks Peter for the comments on the B.09 K Amp.I think I must be getting >600/700 W since my Ant current is 3.5A (ground loss probably twice that on 136 >say 70/80 ohms). EZNEC gives a Rres of 0.2ohms for my antenna so Rad.pwr is >about 250mW.But measurment on 136 indicate only half radiated so I recon >125mW ERP at best. I have calculated my Rres on EZNEC as .01 ohms and with a antenna of 1.5A this gives me a radiated power of 23.2mW. Would the 8dB difference observed by Ko account for this? Regards, Peter, G3LDO e-mail Web From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12648 invoked from network); 4 Jun 2001 22:33:01 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 4 Jun 2001 22:33:01 -0000 Received: (qmail 1314 invoked from network); 4 Jun 2001 22:32:37 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 4 Jun 2001 22:32:37 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 1572oo-0002Mr-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Jun 2001 23:27:26 +0100 Received: from smtp.snet.net ([204.60.6.55]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 1572om-0002Mm-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 23:27:25 +0100 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 f54MQhD17697 for ; Mon, 4 Jun 2001 18:26:43 -0400 (EDT) Received: from mainc (198.212.252.64.snet.net [64.252.212.198]) by pop.snet.net (8.11.1/8.11.1/SNET-pop-1.5/D-1.8/O-1.6) with SMTP id f54MQg512817 for ; Mon, 4 Jun 2001 18:26:42 -0400 (EDT) Message-ID: <002b01c0ed47$afad3940$0100a8c0@mshome.net> From: "Paul A. Cianciolo" To: rsgb_lf_group@blacksheep.org References: Subject: Re: LF: Re: "Ground" losses Date: Mon, 4 Jun 2001 18:42:50 -0400 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: John, This post was in anticipation of getting the band stateside.. I agree.. for receive I would use multiturn loops or a Flag antenna. So I was wonder how well something like this would work for Xmit 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 Air Rifle Target Shooting Enthusiast ----- Original Message ----- From: To: Sent: Monday, June 04, 2001 17:13 PM Subject: Re: LF: Re: "Ground" losses > In a message dated 6/4/01 4:26:52 PM Eastern Daylight Time, paulc@snet.net > writes: > > << I have a location on my property where I could run a flat top antenna > of perhaps 70 to 80 feet high with a top hat made of parallel wires at least > 200 feet long. > > I have a tower on my property that is 130' high and could attache to that > with the proper insulator if I did not mind the tophat sloping from 130' to > around 80 feet. > > Trees would be about 75 feet away in any direction ... > > Your thought? >> > > Seeing that we presently have no legal provision stateside for transmitting > into antennas of those dimensions, I have to assume you are speaking of > receiving. Ground system losses are less of a factor for receiving, > depending on the type of input your receiver has or what sort of antenna > tuner you are using with it. Proximity to trees is not ideal even for > receiving at LF, but 75 feet or so should be acceptable. Receiving loops > would be still better, though. > > John KD4IDY > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27203 invoked from network); 4 Jun 2001 21:18:46 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 4 Jun 2001 21:18:46 -0000 Received: (qmail 4450 invoked from network); 4 Jun 2001 21:18:19 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 4 Jun 2001 21:18:19 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 1571gO-0001l1-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Jun 2001 22:14:40 +0100 Received: from imo-m09.mx.aol.com ([64.12.136.164]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 1571gN-0001kw-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 22:14:39 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from WarmSpgs@aol.com by imo-m09.mx.aol.com (mail_out_v30.22.) id l.ee.16670eeb (25308) for ; Mon, 4 Jun 2001 17:13:27 -0400 (EDT) From: WarmSpgs@aol.com Message-ID: Date: Mon, 4 Jun 2001 17:13:27 EDT Subject: Re: LF: Re: "Ground" losses 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 6/4/01 4:26:52 PM Eastern Daylight Time, paulc@snet.net writes: << I have a location on my property where I could run a flat top antenna of perhaps 70 to 80 feet high with a top hat made of parallel wires at least 200 feet long. I have a tower on my property that is 130' high and could attache to that with the proper insulator if I did not mind the tophat sloping from 130' to around 80 feet. Trees would be about 75 feet away in any direction ... Your thought? >> Seeing that we presently have no legal provision stateside for transmitting into antennas of those dimensions, I have to assume you are speaking of receiving. Ground system losses are less of a factor for receiving, depending on the type of input your receiver has or what sort of antenna tuner you are using with it. Proximity to trees is not ideal even for receiving at LF, but 75 feet or so should be acceptable. Receiving loops would be still better, though. John KD4IDY From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21503 invoked from network); 4 Jun 2001 21:15:00 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 4 Jun 2001 21:15:00 -0000 Received: (qmail 7180 invoked from network); 4 Jun 2001 21:14:34 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 4 Jun 2001 21:14:34 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 1571cG-0001kd-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Jun 2001 22:10:24 +0100 Received: from finch-post-12.mail.demon.net ([194.217.242.41]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 1571cD-0001kY-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 22:10:21 +0100 Received: from rgcomms.demon.co.uk ([193.237.77.63] helo=G) by finch-post-12.mail.demon.net with smtp (Exim 2.12 #1) id 1571bX-000Jc9-0C for rsgb_lf_group@blacksheep.org; Mon, 4 Jun 2001 21:09:39 +0000 From: "Graham Phillips" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: Re: TS-950SDX : good for LF ? Date: Mon, 4 Jun 2001 22:08:13 +0100 Message-ID: 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 IMO, Build 9.0.2416 (9.0.2910.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 In-reply-to: <000c01c0ece8$4180c5e0$f26d78d5@btopenworld.com> Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi David / Alberto, I did use my TS950SD on 136 kHz, although I have pensioned it off at present with a move to the FT1000MP. Note that it is an SD and not the latter SDX model. I did not make any modifications to front-end filters, but after using Dave's TS850 on our GU expedition, noticed that it was rather deaf in comparison. If it would be helpful, I would be pleased to blow the dust off and check it's sensitivity on a sig-gen. P.S. I have recently returned from the U.S. where I re-established communication with a ex-amateur friend who now lives near Washington, D.C. He has a second home located between Kitty Hawk and Nags Head and I have arranged to visit there over Christmas, 2003. I think there should be some interesting events using the Wright Flyer at that time. So if anyone is thinking ahead I will be available for listening skeds at that time ...... 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 13534 invoked from network); 4 Jun 2001 20:32:28 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 4 Jun 2001 20:32:28 -0000 Received: (qmail 27215 invoked from network); 4 Jun 2001 20:31:39 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 4 Jun 2001 20:31:39 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 1570ss-0001NZ-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Jun 2001 21:23:30 +0100 Received: from smtp.snet.net ([204.60.6.55]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 1570sq-0001NU-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 21:23:29 +0100 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 f54KMmD12469; Mon, 4 Jun 2001 16:22:48 -0400 (EDT) Received: from paul (97.79.252.64.snet.net [64.252.79.97]) by pop.snet.net (8.11.1/8.11.1/SNET-pop-1.5/D-1.8/O-1.6) with SMTP id f54KMm511079; Mon, 4 Jun 2001 16:22:48 -0400 (EDT) Message-ID: <002701c0ed4a$8e84bb00$6f01a8c0@paul> From: "Paul Cianciolo" To: "John Sexton" Cc: rsgb_lf_group@blacksheep.org References: <140013.991684787153.JavaMail.computernetworks@gomailjtp01> Subject: Re: LF: Re: "Ground" losses Date: Mon, 4 Jun 2001 16:03:23 -0700 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: Thank you fo rthe response John.. and the group I was also wondering how close the trees were that you cut. I have a location on my property where I could run a flat top antenna of perhaps 70 to 80 feet high with a top hat made of parallel wires at least 200 feet long. I have a tower on my property that is 130' high and could attache to that with the proper insulator if I did not mind the tophat sloping from 130' to around 80 feet. Trees would be about 75 feet away in any direction ... Your thought? ----- Original Message ----- From: "John Sexton" To: "Paul Cianciolo" Sent: Monday, June 04, 2001 12:59 PM Subject: Re: LF: Re: "Ground" losses > Hi Paul, > Yes they are. they behave like leaky capacitors. This has been discussed several times on the reflector. > The problem is exacerbated by the high voltages that short antennas suffer from, and at these frequencies most antennas are short. > This is one of the reasons, why a top loading coil is a good idea, because it reduces the voltages in the lower part of the vertical which is close to the ground, plus it moves high current up the vertical where it does most good. > My situation is particularly bad, because the back garden is on the side of a hill, and at the top there is a beech wood with trees over a 100 foot high. So inevitably the antenna is always near the ground or these leafy capacitors. > As to increasing the radiated power, it does have some effect, but the losses are tens of ohms compared with the milli-ohms of radiation resistance, so until I get it down to less than 30 say, it won't make much difference. Nevertheless every little helps and it is useful to know how much of an effect such changes can make. I am still learning. > 73, John, G4CNN > > -----Original Message----- > From: "Paul Cianciolo" > To: rsgb_lf_group@blacksheep.org > Date: Mon Jun 04 14:18:43 PDT 2001 > Subject: LF: Re: "Ground" losses > > >Hello John,> > >Paul Cianciolo calling here from the States. > > > >Reading your post below it would lead one to believe that trees are somehow > >in series with the antenna? > >Or atleast the ground return path? Could you describe your antenna and the > >trees configuration? > > > >Also does this decrease in resistance cause an increase in the rediated > >field? > > > >Thank you John > > > >PaulC > > > >----- Original Message ----- > >From: "John Sexton" > >To: > >Sent: Monday, June 04, 2001 11:05 AM > >Subject: LF: "Ground" losses > > > > > >> Hi Guys, > >> By risking life and limb at the top of a precarious ladder, cutting off as > >much of the surrounding greenery as possible, I have further reduced my > >apparent "Ground" resistance by a further 8 ohms. Now down to 85 ohms. > >> It seems that an extra metre separation of far end (highest voltage) from > >trees can make that much difference. > >> So I just have to cut back another 10 metres of the surrounding forest to > >reduce it to zero, then alle achtung, hi! > >> John, G4CNN > >> > >> > >> ___________________________________________________ > >> GO.com Mail > >> Get Your Free, Private E-mail at http://mail.go.com > >> > >> > >> > > > > > > > ___________________________________________________ > GO.com Mail > Get Your Free, Private E-mail at http://mail.go.com > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19227 invoked from network); 4 Jun 2001 18:44:26 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 4 Jun 2001 18:44:26 -0000 Received: (qmail 3726 invoked from network); 4 Jun 2001 18:43:59 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 4 Jun 2001 18:43:59 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156zFY-0000Y6-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Jun 2001 19:38:48 +0100 Received: from smtp.snet.net ([204.60.6.55]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156zFX-0000Y1-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 19:38:47 +0100 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 f54Ic9D19168 for ; Mon, 4 Jun 2001 14:38:09 -0400 (EDT) Received: from paul (97.79.252.64.snet.net [64.252.79.97]) by pop.snet.net (8.11.1/8.11.1/SNET-pop-1.5/D-1.8/O-1.6) with SMTP id f54Ic8517688 for ; Mon, 4 Jun 2001 14:38:08 -0400 (EDT) Message-ID: <000401c0ed3b$ef342800$6f01a8c0@paul> From: "Paul Cianciolo" To: rsgb_lf_group@blacksheep.org References: <8350303.991677929918.JavaMail.computernetworks@gomailjtp01> Subject: LF: Re: "Ground" losses Date: Mon, 4 Jun 2001 14:18:43 -0700 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: Hello John, Paul Cianciolo calling here from the States. Reading your post below it would lead one to believe that trees are somehow in series with the antenna? Or atleast the ground return path? Could you describe your antenna and the trees configuration? Also does this decrease in resistance cause an increase in the rediated field? Thank you John PaulC ----- Original Message ----- From: "John Sexton" To: Sent: Monday, June 04, 2001 11:05 AM Subject: LF: "Ground" losses > Hi Guys, > By risking life and limb at the top of a precarious ladder, cutting off as much of the surrounding greenery as possible, I have further reduced my apparent "Ground" resistance by a further 8 ohms. Now down to 85 ohms. > It seems that an extra metre separation of far end (highest voltage) from trees can make that much difference. > So I just have to cut back another 10 metres of the surrounding forest to reduce it to zero, then alle achtung, hi! > John, G4CNN > > > ___________________________________________________ > GO.com Mail > Get Your Free, Private E-mail at http://mail.go.com > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5278 invoked from network); 4 Jun 2001 18:34:53 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 4 Jun 2001 18:34:53 -0000 Received: (qmail 11469 invoked from network); 4 Jun 2001 18:34:28 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 4 Jun 2001 18:34:28 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156z1V-0000QU-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Jun 2001 19:24:17 +0100 Received: from mta00f.seamail.go.com ([204.202.140.192] helo=webmailmta.go.com) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156z1T-0000QP-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 19:24:16 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gomailjtp01 ([10.212.0.161]) by mta00.seamail.go.com (Sun Internet Mail Server sims.4.0.2000.05.17.04.13.p6) with ESMTP id <0GEF0048M48G1L@mta00.seamail.go.com> for rsgb_lf_group@blacksheep.org; Mon, 4 Jun 2001 11:19:28 -0700 (PDT) Date: Mon, 04 Jun 2001 11:22:00 -0700 (PDT) From: "John Sexton" Subject: Re: Re: LF: Re. 73KHz To: rsgb_lf_group@blacksheep.org Message-ID: <6180774.991678920950.JavaMail.computernetworks@gomailjtp01> MIME-Version: 1.0 X-Mailer: GoMail 3.0.0 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: It may be premature, but it looks like congratulations are in order to John and Laurie for something which everyone thought was impossible just a few months ago. Hope it is repeatable. 73, John, G4CNN -----Original Message----- From: "John Currie" To: rsgb_lf_group@blacksheep.org Date: Mon Jun 04 03:22:13 PDT 2001 Subject: Re: LF: Re. 73KHz >Hi Laurie, It looked like what I saw previously on 136. Will Send>picts tonight. If so congrats 73 de John VE1ZJ >Laurie Mayhead wrote: > >> Great John,I think you did it ! my frequencies last night :-Dash = >> 71,921.45Dot = 71,921.35as measured here, +/- a bit I guess.Can >> you confirm the very close spacing of my dots/dashes ?If so I think >> you have recieved the very first amateur T/A signals on 73 KHz.I think >> its worth trying again tonight, I will be on again from about 2200utc >> until 0600 utc.73s Laurie. ___________________________________________________ GO.com Mail Get Your Free, Private E-mail at http://mail.go.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5870 invoked from network); 4 Jun 2001 18:20:46 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 4 Jun 2001 18:20:46 -0000 Received: (qmail 15052 invoked from network); 4 Jun 2001 18:20:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 4 Jun 2001 18:20:23 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156ytl-0000PJ-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Jun 2001 19:16:17 +0100 Received: from [204.202.140.198] (helo=webmailmta.go.com) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156ytk-0000PE-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 19:16:16 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gomailjtp01 ([10.212.0.161]) by mta06.seamail.go.com (Sun Internet Mail Server sims.4.0.2000.10.12.16.25.p8) with ESMTP id <0GEF008J2411D4@mta06.seamail.go.com> for rsgb_lf_group@blacksheep.org; Mon, 4 Jun 2001 11:15:01 -0700 (PDT) Date: Mon, 04 Jun 2001 11:15:03 -0700 (PDT) From: "John Sexton" Subject: Re: LF: New (to me) DL call To: rsgb_lf_group@blacksheep.org Message-ID: <4836017.991678503153.JavaMail.computernetworks@gomailjtp01> MIME-Version: 1.0 X-Mailer: GoMail 3.0.0 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: Hi Alan, Yes I heard this station today, but thought at first, that I had mistaken the call. I heard him first, like you, working Christer, whom I could hear actually and later working F6CNI, first in easy to read slow morse and then rather too fast for me. We have seen this before where you hear something that I don't and vice versa. There must be some element of skywave to explain this surely? Cheers John. -----Original Message----- From: "Alan Melia" To: "LF-Group" Date: Mon Jun 04 06:57:15 PDT 2001 Subject: LF: New (to me) DL call >Hi All, heard DL9DAI (559) working Christer SM6PXJ with some difficulty at>1336z today Monday. The interesting thing is that I can normally hear >Christer in daytime, at least I have on many occasions during the winter. I >could not even detect Christer on the waterfall today. Maybe this indicates >that the summer absorption levels are quite significant and that Christer is >usually received by 'skywave' even in daytime. The band was quite quiet >here, with very little in the way of static crashes. > >Cheers de Alan G3NYK >Alan.Melia@btinterenet.com > > > ___________________________________________________ GO.com Mail Get Your Free, Private E-mail at http://mail.go.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7748 invoked from network); 4 Jun 2001 18:11:31 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 4 Jun 2001 18:11:31 -0000 Received: (qmail 6854 invoked from network); 4 Jun 2001 18:10:41 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 4 Jun 2001 18:10:41 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156ykM-0000Ha-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Jun 2001 19:06:34 +0100 Received: from mta00f.seamail.go.com ([204.202.140.192] helo=webmailmta.go.com) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156ykL-0000HU-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 19:06:33 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gomailjtp01 ([10.212.0.161]) by mta00.seamail.go.com (Sun Internet Mail Server sims.4.0.2000.05.17.04.13.p6) with ESMTP id <0GEF003JY3GXIX@mta00.seamail.go.com> for rsgb_lf_group@blacksheep.org; Mon, 4 Jun 2001 11:02:57 -0700 (PDT) Date: Mon, 04 Jun 2001 11:05:29 -0700 (PDT) From: "John Sexton" Subject: LF: "Ground" losses To: rsgb_lf_group@blacksheep.org Message-ID: <8350303.991677929918.JavaMail.computernetworks@gomailjtp01> MIME-Version: 1.0 X-Mailer: GoMail 3.0.0 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: Hi Guys, By risking life and limb at the top of a precarious ladder, cutting off as much of the surrounding greenery as possible, I have further reduced my apparent "Ground" resistance by a further 8 ohms. Now down to 85 ohms. It seems that an extra metre separation of far end (highest voltage) from trees can make that much difference. So I just have to cut back another 10 metres of the surrounding forest to reduce it to zero, then alle achtung, hi! John, G4CNN ___________________________________________________ GO.com Mail Get Your Free, Private E-mail at http://mail.go.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24984 invoked from network); 4 Jun 2001 17:08:57 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 4 Jun 2001 17:08:57 -0000 Received: (qmail 17745 invoked from network); 4 Jun 2001 17:08:36 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 4 Jun 2001 17:08:36 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156xmD-0008KN-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Jun 2001 18:04:25 +0100 Received: from gadolinium.btinternet.com ([194.73.73.111]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156xmC-0008KI-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 18:04:24 +0100 Received: from [213.122.92.199] (helo=default) by gadolinium.btinternet.com with smtp (Exim 3.03 #83) id 156xl3-0006MN-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 18:03:14 +0100 Message-ID: <000601c0ed18$40076b80$c75c7ad5@default> From: "Alan Melia" To: "LF-Group" Subject: LF: New (to me) DL call Date: Mon, 4 Jun 2001 14:57:15 +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: Hi All, heard DL9DAI (559) working Christer SM6PXJ with some difficulty at 1336z today Monday. The interesting thing is that I can normally hear Christer in daytime, at least I have on many occasions during the winter. I could not even detect Christer on the waterfall today. Maybe this indicates that the summer absorption levels are quite significant and that Christer is usually received by 'skywave' even in daytime. The band was quite quiet here, with very little in the way of static crashes. Cheers de Alan G3NYK Alan.Melia@btinterenet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6905 invoked from network); 4 Jun 2001 15:26:45 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 4 Jun 2001 15:26:45 -0000 Received: (qmail 20628 invoked from network); 4 Jun 2001 15:25:55 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 4 Jun 2001 15:25:55 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156w9U-0007VS-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Jun 2001 16:20:20 +0100 Received: from jubilee.ns.sympatico.ca ([142.177.1.6] helo=mail-ns00s0.ns.sympatico.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156w9Q-0007Uv-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 16:20:17 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.6.47]) by mail-ns00s0.ns.sympatico.ca (Post.Office MTA v3.5.3 release 223 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Mon, 4 Jun 2001 12:18:35 -0300 Message-ID: <3B1B6154.3070DC31@ns.sympatico.ca> Date: Mon, 04 Jun 2001 03:22:13 -0700 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: Re. 73KHz References: <000c01c0ed04$65b9c760$4b27893e@g3aqc> 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 Hi  Laurie,  It looked  like what I saw previously on 136. Will Send picts tonight.    If so congrats 73 de John VE1ZJ
Laurie Mayhead wrote:
Great John,I  think you did it ! my frequencies last night :-Dash = 71,921.45Dot     = 71,921.35as measured here, +/- a bit I guess.Can you confirm the very close spacing of my dots/dashes ?If so I think you have recieved the very first amateur T/A signals on 73 KHz.I think its worth trying again tonight, I will be on again from about 2200utc until 0600 utc.73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4571 invoked from network); 4 Jun 2001 14:47:50 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 4 Jun 2001 14:47:50 -0000 Received: (qmail 22793 invoked from network); 4 Jun 2001 14:47:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 4 Jun 2001 14:47:23 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156vYL-00079e-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Jun 2001 15:41:57 +0100 Received: from mail6.svr.pol.co.uk ([195.92.193.212]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156vYH-00079Z-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 15:41:54 +0100 Received: from modem-75.lyre-tailed-anthias.dialup.pol.co.uk ([62.137.39.75] helo=g3aqc) by mail6.svr.pol.co.uk with smtp (Exim 3.13 #0) id 156vXg-0005fj-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 15:41:17 +0100 Message-ID: <000c01c0ed04$65b9c760$4b27893e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: Re. 73KHz Date: Mon, 4 Jun 2001 15:40:10 +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
Great John,
I  think you did it ! my frequencies last night :-
Dash = 71,921.45
Dot     = 71,921.35
as measured here, +/- a bit I guess.
Can you confirm the very close spacing of my dots/dashes ?
If so I think you have recieved the very first amateur T/A signals on 73 KHz.
I think its worth trying again tonight, I will be on again from about 2200utc until 0600 utc.
73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25582 invoked from network); 4 Jun 2001 14:05:49 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 4 Jun 2001 14:05:49 -0000 Received: (qmail 16082 invoked from network); 4 Jun 2001 14:05:24 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 4 Jun 2001 14:05:24 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156urQ-0006mF-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Jun 2001 14:57:36 +0100 Received: from jubilee.ns.sympatico.ca ([142.177.1.6] helo=mail-ns00s0.ns.sympatico.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156urM-0006m7-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 14:57:33 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.65.30]) by mail-ns00s0.ns.sympatico.ca (Post.Office MTA v3.5.3 release 223 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Mon, 4 Jun 2001 10:55:47 -0300 Message-ID: <3B1B4DEB.E0105D35@ns.sympatico.ca> Date: Mon, 04 Jun 2001 01:59:25 -0700 From: "John Currie" X-Mailer: Mozilla 4.73 [en] (Win95; U) X-Accept-Language: en,pdf MIME-Version: 1.0 To: "rsgb" Subject: LF: 73 kHz 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 Laurie es Peter. I watched the screen caerfully last night . Sorry , Peter , I didn't knoe you were on. I will always be using 30 sec dots . That will restrict my receive window. Last night i was receiving from 71.920 to around 71.929. I recommend all transmit between .920 and .929. Peter if you can't move tellme es I will readjust freq. Can you change to 30 sec dots? Last night the K index was a 3. I have only seen Eu twice when k is 3 es never when K was higher. I thought I saw the number " 3" once es seven or eight minutes later the letter "G". The freq , however, was wrong . It was more like 71.921.5. Could that have been you, Laurie. I"m writing this at work . As i remember it time was around 0150Z Condx were disturbed last night Eu ,UA3,HA es G stations on 14 mHz were strong but ua9 es other Asian stations were very weak, es I couldn't raise them That's it for now I'm ready when you are for more testing. 73 de John VE1ZJ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17180 invoked from network); 4 Jun 2001 13:24:46 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 4 Jun 2001 13:24:46 -0000 Received: (qmail 28539 invoked from network); 4 Jun 2001 13:24:19 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 4 Jun 2001 13:24:19 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156uD6-0006Rd-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Jun 2001 14:15:56 +0100 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 #2) id 156uD2-0006RY-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 14:15:52 +0100 Received: from miked by rsgb.org.uk with SMTP (MDaemon.PRO.v4.0.0.R) for ; Mon, 04 Jun 2001 14:14:58 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Mon, 4 Jun 2001 14:14:55 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: e-QSL Message-ID: <3B1B97DF.17170.119E934@localhost> In-reply-to: <4Q3QYGAnxeG7EwjD@telemetry.demon.co.uk> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-Return-Path: miked@mail X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > Comments: Congratulations Steve on an excellent 5 watt QRP signal and > your first LF/QRP QSO! Nice one, Steve. It is just this sort of initiative that will encourage a little more one-air activity. 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 22217 invoked from network); 4 Jun 2001 11:22:25 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 4 Jun 2001 11:22:25 -0000 Received: (qmail 8357 invoked from network); 4 Jun 2001 11:21:58 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 4 Jun 2001 11:21:58 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156sL3-0005WK-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Jun 2001 12:16:01 +0100 Received: from rhenium.btinternet.com ([194.73.73.93] helo=rhenium) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156sL0-0005WE-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 12:15:58 +0100 Received: from [213.120.109.242] (helo=mud) by rhenium with smtp (Exim 3.03 #83) id 156sKM-0004Gl-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 12:15:18 +0100 Message-ID: <000c01c0ece8$4180c5e0$f26d78d5@btopenworld.com> From: "G3YXM" To: rsgb_lf_group@blacksheep.org References: <3B1B6046.4E09DA5@usa.net> Subject: LF: Re: TS-950SDX : good for LF ? Date: Mon, 4 Jun 2001 12:19:43 +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 5.00.2615.200 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: Alberto. I think the front-ends of the two rigs are very similar. I know Graham G3XTZ used one with no problems. There is an attenuator on most Kenwoods which is switched in below 1.6MHz. Perhaps your 850 had this removed, I did it to mine. I think you need to remove this on your 950. Dave G3YXM. > A question for you all. This last weekend at a local hamfest I swapped > my TS-850AT for its big brother, the TS-950SDX > Overall I am satisfied with the new rig, but I noticed a dramatic decrease > (I would subjectively judge about 20 dB) is sensitivity on the 136 kHz band. > > Is this to be expected from this radio, or is just mine who has some problems ? > Any experience with the 950SDX on LF ? Thanks for any info. > > 73 Alberto I2PHD > > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20352 invoked from network); 4 Jun 2001 10:32:04 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 4 Jun 2001 10:32:04 -0000 Received: (qmail 9443 invoked from network); 4 Jun 2001 10:31:40 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 4 Jun 2001 10:31:40 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156rRz-00055W-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Jun 2001 11:19:07 +0100 X-MSMail-Priority: Normal Received: from d06lmsgate.uk.ibm.com ([195.212.29.1]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156rRy-00055P-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 11:19:06 +0100 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 LAA32472; Mon, 4 Jun 2001 11:00:07 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (ss11.pok.socks.ibm.com [9.14.3.93]) by d06relay02.portsmouth.uk.ibm.com (8.8.8m3/NCO v4.96) with ESMTP id LAA157610; Mon, 4 Jun 2001 11:17:24 +0100 Message-ID: <3B1B6046.4E09DA5@usa.net> Date: Mon, 04 Jun 2001 12:17:42 +0200 From: "Alberto di Bene" X-Mailer: Mozilla 4.76 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: "LF Mailing List" , lowfer@qth.net Subject: LF: TS-950SDX : good for LF ? 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: A question for you all. This last weekend at a local hamfest I swapped my TS-850AT for its big brother, the TS-950SDX Overall I am satisfied with the new rig, but I noticed a dramatic decrease (I would subjectively judge about 20 dB) is sensitivity on the 136 kHz band. Is this to be expected from this radio, or is just mine who has some problems ? Any experience with the 950SDX on LF ? Thanks for any info. 73 Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7772 invoked from network); 4 Jun 2001 10:23:42 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 4 Jun 2001 10:23:42 -0000 Received: (qmail 26913 invoked from network); 4 Jun 2001 10:23:17 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 4 Jun 2001 10:23:17 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156rKs-0004yU-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Jun 2001 11:11:46 +0100 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 #2) id 156rKr-0004yN-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 11:11:45 +0100 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 LAA11686 for ; Mon, 4 Jun 2001 11:01:32 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (ss11.pok.socks.ibm.com [9.14.3.93]) by d06relay02.portsmouth.uk.ibm.com (8.8.8m3/NCO v4.96) with ESMTP id LAA185064 for ; Mon, 4 Jun 2001 11:10:06 +0100 Message-ID: <3B1B5E90.807273D2@usa.net> Date: Mon, 04 Jun 2001 12:10:24 +0200 From: "Alberto di Bene" 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: LF Meeting at the Ham Radio, June 30th References: <2b.16536e58.284bc675@aol.com> Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: DL4YHF@aol.com wrote:
Hello group,

As in the past years, there will be a meeting of LF friends during the Ham
Radio (hamfest in Friedrichshafen at the Bodensee, close to the HB9 and OE
border).
[...]

Then probably we will be able to met in person, Wolf.
Myself and Vittorio, IK2CZL will be there with a 90 % confidence level.
Only hope the meeting won't be held in German...:-)

73  Alberto  I2PHD
  From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19064 invoked from network); 4 Jun 2001 09:19:37 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 4 Jun 2001 09:19:37 -0000 Received: (qmail 10762 invoked from network); 4 Jun 2001 09:18:48 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 4 Jun 2001 09:18:48 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156qPT-0004Sy-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Jun 2001 10:12:27 +0100 Received: from mail11.svr.pol.co.uk ([195.92.193.23]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156qPR-0004St-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 10:12:25 +0100 Received: from modem-109.leopard-shark.dialup.pol.co.uk ([62.137.37.237] helo=g3aqc) by mail11.svr.pol.co.uk with smtp (Exim 3.13 #0) id 156qOq-00046y-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 10:11:49 +0100 Message-ID: <002301c0ecd6$5f5d9960$ed25893e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: Re. 73KHz tests Date: Mon, 4 Jun 2001 09:58:29 +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

Thanks Ko for the report.glad you saw us.
Thanks Peter for the comments on the B.09 K Amp.I think I must be getting 600/700 W since my Ant current is 3.5A (ground loss probably twice that on 136 say 70/80 ohms). EZNEC gives a Rres of 0.2ohms for my antenna so Rad.pwr is about 250mW.But measurment on 136 indicate only half radiated so I recon. 125mW ERP at best.
Prop. cdx were not too good last night so will try again when things look better.At least the fuses did' nt blow !
73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21431 invoked from network); 4 Jun 2001 01:40:33 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 4 Jun 2001 01:40:33 -0000 Received: (qmail 16901 invoked from network); 4 Jun 2001 01:40:04 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 4 Jun 2001 01:40:04 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156jEu-00017W-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Jun 2001 02:33:04 +0100 Received: from smtp.wanadoo.nl ([194.134.193.6]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156jEt-00017R-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 02:33:03 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from default (p618.vcu.wanadoo.nl [194.134.201.146]) by smtp.wanadoo.nl (8.11.2/8.11.2) with SMTP id f541WOe07966 for ; Mon, 4 Jun 2001 03:32:24 +0200 (MET DST) Message-ID: <200106040132.f541WOe07966@smtp.wanadoo.nl> Date: Mon, 4 Jun 2001 3:32:32 +0100 From: "Ko Versteeg" To: rsgb_lf_group@blacksheep.org Subject: LF: 73Khz X-Mailer: FoxMail 2.1 [en] 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: Laurie.. Visible here on Argo -99.2dB Ur my 1st on 73Khz,Tnx Peter.. Your signal -108dB, good to see some signals on 73. Things seem quiete different from 136 73 de Ko, NL9222 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12427 invoked from network); 3 Jun 2001 23:17:22 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 3 Jun 2001 23:17:22 -0000 Received: (qmail 25372 invoked from network); 3 Jun 2001 23:16:35 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 3 Jun 2001 23:16:35 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156h1j-0008Vg-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Jun 2001 00:11:19 +0100 Received: from latimer.mail.uk.easynet.net ([195.40.1.40]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156h1i-0008Vb-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Jun 2001 00:11:18 +0100 Received: from ericadodd (tnt-6-205.easynet.co.uk [195.40.201.205]) by latimer.mail.uk.easynet.net (Postfix) with SMTP id 5B0BD5394E for ; Mon, 4 Jun 2001 00:10:38 +0100 (BST) Message-ID: <000601c0ec83$0e0a4980$cdc928c3@ericadodd> From: "g3ldo" To: rsgb_lf_group@blacksheep.org References: <001601c0ec7c$67b09720$a9a0883e@g3aqc> Subject: LF: Re: Re 71Khz T/A tests Date: Mon, 4 Jun 2001 00:14:32 +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 5.50.4522.1200 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 Laurie, and any 73kHz watchers. Laurie said >I think things are against us but its worth a try,and I want to see if the fuses will hold >out. The TX runs more power on 71.9 so gets hotter,but the radiated power is less >probably only 100mW. Anyway lets see,great to have your company Peter. In our early experiments with BK amplifiers we found we could get the rated power out on 73kHz. I think that you are using the 1kW version. I am using the 300W version which used put out a good 300W on 73kHz but tonight I can only get 200W, with about 1.5amps into the antenna. According to EZNEC that should give me about 25mW. I would be interested to know what antenna current you are getting. Hopefully we might get some comparative reports Regards, Peter, G3LDO e-mail Web From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1184 invoked from network); 3 Jun 2001 22:34:04 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 3 Jun 2001 22:34:04 -0000 Received: (qmail 18783 invoked from network); 3 Jun 2001 22:33:16 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 3 Jun 2001 22:33:16 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156gMF-00085j-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 03 Jun 2001 23:28:27 +0100 Received: from cmailg5.svr.pol.co.uk ([195.92.195.175]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156gME-00085e-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Jun 2001 23:28:26 +0100 Received: from modem-41.dunharrow.dialup.pol.co.uk ([62.136.160.169] helo=g3aqc) by cmailg5.svr.pol.co.uk with smtp (Exim 3.13 #0) id 156gLc-0006Qm-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Jun 2001 23:27:48 +0100 Message-ID: <001601c0ec7c$67b09720$a9a0883e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: Re 71Khz T/A tests Date: Sun, 3 Jun 2001 23:27:02 +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
Hi Peter and all,
I think things are against us but its worth a try,and I want to see if the fuses will hold out. The TX runs more power on 71.9 so gets hotter,but the radiated power is less probably only 100mW. Anyway lets see,great to have your company Peter.  73s Laurie. 
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7148 invoked from network); 3 Jun 2001 22:12:01 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 3 Jun 2001 22:12:01 -0000 Received: (qmail 15935 invoked from network); 3 Jun 2001 22:11:37 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 3 Jun 2001 22:11:37 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156g0t-0007xx-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 03 Jun 2001 23:06:23 +0100 Received: from chalfont.mail.uk.easynet.net ([195.40.1.44]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156g0s-0007xs-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Jun 2001 23:06:22 +0100 Received: from ericadodd (tnt-1-115.easynet.co.uk [195.40.206.115]) by chalfont.mail.uk.easynet.net (Postfix) with SMTP id 397D8F8821 for ; Sun, 3 Jun 2001 23:05:44 +0100 (BST) Message-ID: <001901c0ec79$fa9c0220$73ce28c3@ericadodd> From: "g3ldo" To: rsgb_lf_group@blacksheep.org References: <004401c0ec5e$64e53dc0$f2b7883e@g3aqc> Subject: LF: Re: 73kHz tests. Date: Sun, 3 Jun 2001 23:09:31 +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 5.50.4522.1200 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: Laurie said: >I am going to run the beacon on 71.922 tonight, a long shot I know but who knows! I have dusted the cobwebs off my old BK amplifier and am transmitting on 71.85kHz QRSS 20 sec dots Relatively low power at 200W. Regards, Peter, G3LDO e-mail Web From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11313 invoked from network); 3 Jun 2001 21:46:12 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 3 Jun 2001 21:46:12 -0000 Received: (qmail 29319 invoked from network); 3 Jun 2001 21:45:25 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 3 Jun 2001 21:45:25 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156fbV-0007j8-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 03 Jun 2001 22:40:09 +0100 Received: from rhenium.btinternet.com ([194.73.73.93] helo=rhenium) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156fbU-0007j3-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Jun 2001 22:40:08 +0100 Received: from [62.7.70.244] (helo=default) by rhenium with smtp (Exim 3.03 #83) id 156fat-0004M0-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Jun 2001 22:39:31 +0100 Message-ID: <001001c0ec75$ace08d20$f446073e@default> From: "Alan Melia" To: "LF-Group" Subject: LF: 136kHz QRP Well done Steve Date: Sun, 3 Jun 2001 22:21:44 +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 Steve, I nearly ripped my rx apart when I heard a station working you, and I could not hear you!! I ALWAYS copy you on the speaker, no matter which aerial you are running.....normally. That is a very creditable list of distances worked for 5 watts output. That should act as stimulator to those who want to try the band. Also, it provides a very good bit of aerial testing gear, because the secret is all in the aerial. 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 1771 invoked from network); 3 Jun 2001 20:23:09 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 3 Jun 2001 20:23:09 -0000 Received: (qmail 18593 invoked from network); 3 Jun 2001 20:22:43 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 3 Jun 2001 20:22:43 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156eJ1-00075N-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 03 Jun 2001 21:16:59 +0100 Received: from tomts6.bellnexxia.net ([209.226.175.26] helo=tomts6-srv.bellnexxia.net) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156eJ0-00075I-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Jun 2001 21:16:58 +0100 Received: from server1 ([216.209.138.97]) by tomts6-srv.bellnexxia.net (InterMail vM.4.01.03.16 201-229-121-116-20010115) with SMTP id <20010603201550.BIJW7009.tomts6-srv.bellnexxia.net@server1> for ; Sun, 3 Jun 2001 16:15:50 -0400 Message-ID: <008301c0ec69$8660dcb0$0a00a8c0@ThreeLakes.ca> From: "Larry Kayser" To: rsgb_lf_group@blacksheep.org References: <2022622.991593355116.JavaMail.imail@bronty> Subject: Re: LF: 73 kHz look Date: Sun, 3 Jun 2001 16:12:21 -0400 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: > 72.5 not heard here Cutler, Maine. Loud enough at John's place and here in Ontario to be used as a substitute for a razor. Larry VA3LK From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17985 invoked from network); 3 Jun 2001 19:00:40 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 3 Jun 2001 19:00:40 -0000 Received: (qmail 9827 invoked from network); 3 Jun 2001 19:00:13 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 3 Jun 2001 19:00:13 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156d0N-0006Pu-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 03 Jun 2001 19:53:39 +0100 Received: from cmailg2.svr.pol.co.uk ([195.92.195.172]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156d0M-0006Pp-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Jun 2001 19:53:38 +0100 Received: from modem-242.elendil.dialup.pol.co.uk ([62.136.183.242] helo=g3aqc) by cmailg2.svr.pol.co.uk with smtp (Exim 3.13 #0) id 156czj-0007Q6-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Jun 2001 19:53:00 +0100 Message-ID: <004401c0ec5e$64e53dc0$f2b7883e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: LF tests. Date: Sun, 3 Jun 2001 19:52:04 +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
Hi all,
I am going to run the beacon on 71.922 tonight, a long shot I know but who knows!  73s Laurie
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29881 invoked from network); 3 Jun 2001 18:42:23 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 3 Jun 2001 18:42:23 -0000 Received: (qmail 12102 invoked from network); 3 Jun 2001 18:41:57 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 3 Jun 2001 18:41:57 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156ckK-0006I5-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 03 Jun 2001 19:37:04 +0100 Received: from gigi.excite.com ([199.172.152.110]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156ckJ-0006Hw-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Jun 2001 19:37:03 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from bronty ([199.172.153.112]) by gigi.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20010603183555.LKVH3984.gigi.excite.com@bronty> for ; Sun, 3 Jun 2001 11:35:55 -0700 Message-ID: <2022622.991593355116.JavaMail.imail@bronty> Date: Sun, 3 Jun 2001 11:35:53 -0700 (PDT) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: 73 kHz look 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 John, 60kHz is probably US WWV transmission. 65.8 MSK heard here. 68 Rugby 72.5 not heard here 73.6 RTTY heard here 75 HBG, Frangins, Swiss 77.5 DCF77, Mainflingen 81 GYN2, London In this range, we also have: 68.9 DHJ58 Military near Flensburg, Germany 73.4 Rugby 78.2 RTTY I will try to do some measurements of signal strength for comparison. 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 14259 invoked from network); 3 Jun 2001 18:33:28 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 3 Jun 2001 18:33:28 -0000 Received: (qmail 7989 invoked from network); 3 Jun 2001 18:32:59 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 3 Jun 2001 18:32:59 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156cZs-0006BS-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 03 Jun 2001 19:26:16 +0100 Received: from fortune-rwcmta.excite.com ([198.3.99.203] helo=fortune.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156cZq-0006BN-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Jun 2001 19:26:15 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from bronty ([199.172.153.112]) by fortune.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20010603182502.IEPF4228.fortune.excite.com@bronty> for ; Sun, 3 Jun 2001 11:25:02 -0700 Message-ID: <34440.991592702479.JavaMail.imail@bronty> Date: Sun, 3 Jun 2001 11:24:54 -0700 (PDT) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: e-QSL 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 Tom, Steve, I heard the tail-end of that, though Steve was only just audible here. Would be interested to know what you were running Steve? 73, John _______________________________________________________ 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 6694 invoked from network); 3 Jun 2001 17:07:31 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 3 Jun 2001 17:07:31 -0000 Received: (qmail 2194 invoked from network); 3 Jun 2001 17:06:43 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 3 Jun 2001 17:06:43 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156bCY-0005Uf-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 03 Jun 2001 17:58:06 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from imo-d02.mx.aol.com ([205.188.157.34]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156bCX-0005Ua-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Jun 2001 17:58:05 +0100 Received: from DL4YHF@aol.com by imo-d02.mx.aol.com (mail_out_v30.22.) id l.2b.16536e58 (17379) for ; Sun, 3 Jun 2001 12:57:25 -0400 (EDT) From: DL4YHF@aol.com Message-ID: <2b.16536e58.284bc675@aol.com> Date: Sun, 3 Jun 2001 12:57:25 EDT Subject: LF: Info: LF Meeting at the Ham Radio, June 30th To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Mailer: AOL 6.0 for Windows DE sub 217 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit Hello group,

As in the past years, there will be a meeting of LF friends during the Ham
Radio (hamfest in Friedrichshafen at the Bodensee, close to the HB9 and OE
border).
Thanks to Walter, DJ2LF, for this opportunity. The meeting will be on
Saturday, June 30, at 10:00 (local) in hall 2, conference room B. I think
more info from Walter will follow later.

I will be QRV for a few days in Friedrichshafen on 70cm in FM (simplex)
preferably on 439.475MHz (sorry I cannot take the 136kHz-handheld TRX with
the rubber duckie antenna with me). Would be nice to meet you there.

73 Wolf DL4YHF.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12158 invoked from network); 3 Jun 2001 14:58:09 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 3 Jun 2001 14:58:09 -0000 Received: (qmail 10708 invoked from network); 3 Jun 2001 14:57:43 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 3 Jun 2001 14:57:43 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156ZEk-0004al-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 03 Jun 2001 15:52:14 +0100 X-MSMail-Priority: Normal Received: from anchor-post-30.mail.demon.net ([194.217.242.88]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156ZEj-0004ag-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Jun 2001 15:52:13 +0100 Received: from alg.demon.co.uk ([194.222.171.80]) by anchor-post-30.mail.demon.net with esmtp (Exim 2.12 #1) id 156ZGr-0004xu-0U for rsgb_lf_group@blacksheep.org; Sun, 3 Jun 2001 15:54:26 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B1A5014.138FAA12@alg.demon.co.uk> Date: Sun, 03 Jun 2001 15:56:20 +0100 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: e-QSL References: <4Q3QYGAnxeG7EwjD@telemetry.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: Tom G3OLB wrote: > Confirming our contact today as follows: > [ . . . . .] > Comments: Congratulations Steve on an excellent 5 watt QRP signal and > your first LF/QRP QSO! Tom, many thanks for QSO and for the e-QSL! I was very excited to make the contact - so I'm sorry that my morse was a bit shaky! I had been constructing the new QRP TX during the past week, and decided to give it a try during the 136 Activity Period this morning (Sunday). The TX uses: a FET VFO (2 x 2N3819 FETs in a source-coupled oscillator, using a 4.7 mH RF choke in the tuned circuit); FET buffer; 2N2222 amplifier + BC212 keying transistor; 2SC2166 driver; 2 x 2SC2166 PA (the two transistors connected in parallel, with individual one ohm emitter resistors, each decoupled by 22 uF). As my breadboarded circuit is still without a heatsink on the PA transistors, I have to keep the overs short! A picture of the TX can be seen at: http://www.alg.demon.co.uk/radio/136/pictures/qrptx_1.jpg After my QSO with Tom (97 km), I later had more QRP QSOs with G3YXM (105 km) and G8IK (101 km) - all using 5 watts RF to my simple 12 m vertical (no top loading). I believe that a simple low power transmitter for 136 kHz would make an excellent club project, with the very real prospect of not just making LF QSOs across town - but with other countries too! Regards to all, Steve GW4ALG From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4109 invoked from network); 3 Jun 2001 12:58:52 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 3 Jun 2001 12:58:52 -0000 Received: (qmail 18944 invoked from network); 3 Jun 2001 12:58:28 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 3 Jun 2001 12:58:28 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156XMm-0003cz-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 03 Jun 2001 13:52:24 +0100 Received: from jubilee.ns.sympatico.ca ([142.177.1.6] helo=mail-ns00s0.ns.sympatico.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156XMf-0003cs-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Jun 2001 13:52:20 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.9.87]) by mail-ns00s0.ns.sympatico.ca (Post.Office MTA v3.5.3 release 223 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Sun, 3 Jun 2001 09:50:58 -0300 Message-ID: <3B1A6C00.7055AFAD@ns.sympatico.ca> Date: Sun, 03 Jun 2001 12:55:29 -0400 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: 73 kHz look 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 thursday morning I saw the following. 60kHz S-9 65.8kHz rtty S-9 68kHz S-6 72.5kHz rtty just audible(strongQRM from 73.6) 73.6S-9+40db 75kHz S-3 77.5kHz S-4 81kHz rtty S-4 Time was 0350 It might have been too late for some of the stations. Ten minutes later 77.5 was down to S-2 Last night I listened again. At 0100 73.6 and 73.25 wereboth transmitting a steady carrier. they were S9+40 and S-6 respectively below around 7..2 kHz I believe the band is clear 73de John VE1ZJ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25515 invoked from network); 3 Jun 2001 08:04:54 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 3 Jun 2001 08:04:54 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 28112 invoked from network); 3 Jun 2001 08:04:26 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 3 Jun 2001 08:04:26 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156Sgb-0001RA-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 03 Jun 2001 08:52:33 +0100 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 #2) id 156SgY-0001R5-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Jun 2001 08:52:30 +0100 Received: from telemetry.demon.co.uk ([194.222.19.114]) by finch-post-10.mail.demon.net with smtp (Exim 2.12 #1) id 156Sfx-0002bH-0A for rsgb_lf_group@blacksheep.org; Sun, 3 Jun 2001 07:51:53 +0000 Message-ID: <4Q3QYGAnxeG7EwjD@telemetry.demon.co.uk> Date: Sun, 3 Jun 2001 08:51:03 +0100 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: LF: e-QSL 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: e-QSL From: G3OLB To: GW4ALG Confirming our contact today as follows: Date: 3rd June 2001 Time: 0730 GMT Frequency: 136.77 RST: Your signals 569 Mode: CW (Morse) Rig: Home brew, 600 watts RF from STW20NB50 full bridge PA. Antenna: 1100 ft (335m) long wire. Comments: Congratulations Steve on an excellent 5 watt QRP signal and your first LF/QRP QSO! 73, Tom G3OLB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12526 invoked from network); 2 Jun 2001 18:23:21 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 2 Jun 2001 18:23:21 -0000 Received: (qmail 15081 invoked from network); 2 Jun 2001 18:22:55 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 2 Jun 2001 18:22:55 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156FxV-0003nh-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 02 Jun 2001 19:17:09 +0100 Received: from mail1.svr.pol.co.uk ([195.92.193.18]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156FxU-0003nc-00 for rsgb_lf_group@blacksheep.org; Sat, 02 Jun 2001 19:17:08 +0100 Received: from modem-5.endostatin.dialup.pol.co.uk ([62.136.92.133] helo=robing) by mail1.svr.pol.co.uk with smtp (Exim 3.13 #0) id 156Fwu-0006H6-00 for rsgb_lf_group@blacksheep.org; Sat, 02 Jun 2001 19:16:32 +0100 Message-ID: <001301c0eb87$f607ea00$855c883e@robing> From: "Robin T. Greenwood" To: rsgb_lf_group@blacksheep.org References: Subject: Re: LF: QSOs and snails Date: Sat, 2 Jun 2001 18:17:46 +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: What a waste... However...I would like to see a stuffed snail! The UK local variety cooked in garlic are super. Keep them in a plastic bucket for 4 days before eating.. Robin G3LBA ----- Original Message ----- From: "Tom Boucher" To: Sent: Saturday, June 02, 2001 6:00 PM Subject: Re: LF: QSOs and snails > John > > I thought escargot were usually stuffed with garlic and baked in a > medium oven! > > 73, Tom G3OLB > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13066 invoked from network); 2 Jun 2001 17:57:17 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 2 Jun 2001 17:57:17 -0000 Received: (qmail 3430 invoked from network); 2 Jun 2001 17:56:47 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 2 Jun 2001 17:56:47 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156FZw-0003Yn-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 02 Jun 2001 18:52:48 +0100 Received: from fep01.swip.net ([130.244.199.129] helo=fep01-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156FZv-0003Yi-00 for rsgb_lf_group@blacksheep.org; Sat, 02 Jun 2001 18:52:47 +0100 Received: from oemcomputer ([212.151.40.173]) by fep01-svc.swip.net with SMTP id <20010602175256.OBHM16891.fep01-svc.swip.net@oemcomputer> for ; Sat, 2 Jun 2001 19:52:56 +0200 Message-ID: <004e01c0eb84$5f79c480$ad2897d4@oemcomputer> From: "Johan Bodin" To: rsgb_lf_group@blacksheep.org Subject: SV: LF: QSOs and snails Date: Sat, 2 Jun 2001 19:52:12 +0300 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: Tom, John, >I thought escargot were usually stuffed with garlic and baked in a >medium oven! I suppose you mean mediumwave oven? Yes, why not... They can be baked in microwave ovens and now when experimental longwave ovens shows promising results, I can't see any reason why 1 MHz shouldn't work... 73, Johan SM6LKM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28228 invoked from network); 2 Jun 2001 17:44:08 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 2 Jun 2001 17:44:08 -0000 Received: (qmail 27371 invoked from network); 2 Jun 2001 17:43:21 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 2 Jun 2001 17:43:21 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156FMw-0003RR-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 02 Jun 2001 18:39:22 +0100 Received: from neptune.imagenisp.com ([204.244.138.19]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156FMv-0003RM-00 for rsgb_lf_group@blacksheep.org; Sat, 02 Jun 2001 18:39:21 +0100 Received: from jsm (gi89.imagenisp.com [204.244.17.116]) by neptune.imagenisp.com with SMTP (Microsoft Exchange Internet Mail Service Version 5.5.2650.21) id L5TQXP96; Sat, 2 Jun 2001 10:39:04 -0700 Message-ID: <000801c0eb8b$45065bc0$7411f4cc@jsm> From: "Steve McDonald" To: rsgb_lf_group@blacksheep.org References: Subject: Re: LF: QSOs and snails Date: Sat, 2 Jun 2001 10:41:31 -0700 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: John has a real "slug" tuned coil there! VE7SL > John > > I thought escargot were usually stuffed with garlic and baked in a > medium oven! > > 73, Tom G3OLB > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18566 invoked from network); 2 Jun 2001 17:06:45 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 2 Jun 2001 17:06:45 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 10646 invoked from network); 2 Jun 2001 17:05:58 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 2 Jun 2001 17:05:58 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156Emh-0003DE-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 02 Jun 2001 18:01:55 +0100 Received: from finch-post-12.mail.demon.net ([194.217.242.41]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156Emg-0003D9-00 for rsgb_lf_group@blacksheep.org; Sat, 02 Jun 2001 18:01:54 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from telemetry.demon.co.uk ([194.222.19.114]) by finch-post-12.mail.demon.net with smtp (Exim 2.12 #1) id 156Em5-0009f1-0C for rsgb_lf_group@blacksheep.org; Sat, 2 Jun 2001 17:01:18 +0000 Message-ID: Date: Sat, 2 Jun 2001 18:00:24 +0100 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: Re: LF: QSOs and snails In-reply-to: <18120402.991476319296.JavaMail.imail@bronty> 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: John I thought escargot were usually stuffed with garlic and baked in a medium oven! 73, Tom G3OLB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28579 invoked from network); 2 Jun 2001 15:08:14 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 2 Jun 2001 15:08:14 -0000 Received: (qmail 25971 invoked from network); 2 Jun 2001 15:07:48 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 2 Jun 2001 15:07:48 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156Cul-0002JI-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 02 Jun 2001 16:02:07 +0100 Received: from mail4.svr.pol.co.uk ([195.92.193.211]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156Cuk-0002JD-00 for rsgb_lf_group@blacksheep.org; Sat, 02 Jun 2001 16:02:06 +0100 Received: from modem-13.anfauglith.dialup.pol.co.uk ([62.136.110.13] helo=g3aqc) by mail4.svr.pol.co.uk with smtp (Exim 3.13 #0) id 156Cu9-0006vz-00 for rsgb_lf_group@blacksheep.org; Sat, 02 Jun 2001 16:01:29 +0100 Message-ID: <001501c0eb74$e206bd00$0d6e883e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: Re. lf tests Date: Sat, 2 Jun 2001 16:00:44 +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
Hi John, Alan,Brian, and All,
Thanks for the report John,looks like you are getting good at forecasting now Alan!
Brians excellent plot show the path to CT opening earlier,but closing at about the same time.
I won't be on tonight but if condx still holding will try Sun. night. 73s Laurie.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3863 invoked from network); 2 Jun 2001 14:20:46 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 2 Jun 2001 14:20:46 -0000 Received: (qmail 29472 invoked from network); 2 Jun 2001 14:20:20 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 2 Jun 2001 14:20:20 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 156CAf-0001xd-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 02 Jun 2001 15:14:29 +0100 Received: from jubilee.ns.sympatico.ca ([142.177.1.6] helo=mail-ns00s0.ns.sympatico.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 156CAe-0001xY-00 for rsgb_lf_group@blacksheep.org; Sat, 02 Jun 2001 15:14:28 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.87.179]) by mail-ns00s0.ns.sympatico.ca (Post.Office MTA v3.5.3 release 223 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Sat, 2 Jun 2001 11:12:52 -0300 Message-ID: <3B192DB1.57367BF1@ns.sympatico.ca> Date: Sat, 02 Jun 2001 14:17:22 -0400 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: 136 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 Laurie your sigs were in from 0100 to 0315 last I saw was # 3 toleft of screen at 0336 . was using 30 sec dots Will have report on 73 kHz observations from thurs nite later 73 de john VE1ZJ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18787 invoked from network); 2 Jun 2001 10:15:36 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 2 Jun 2001 10:15:36 -0000 Received: (qmail 5950 invoked from network); 2 Jun 2001 10:15:11 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 2 Jun 2001 10:15:11 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 1568IH-00004N-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 02 Jun 2001 11:06:05 +0100 Received: from bucky-rwcmex.excite.com ([198.3.99.218] helo=bucky.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #2) id 1568IG-00004I-00 for rsgb_lf_group@blacksheep.org; Sat, 02 Jun 2001 11:06:05 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from bronty ([199.172.153.112]) by bucky.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20010602100519.TLBU17977.bucky.excite.com@bronty> for ; Sat, 2 Jun 2001 03:05:19 -0700 Message-ID: <18120402.991476319296.JavaMail.imail@bronty> Date: Sat, 2 Jun 2001 03:05:03 -0700 (PDT) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: LF: QSOs and snails 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, Congrats to Bob (G8RW) and Jeff (F6BWO) on finally completing a QSO this morning. Jeff persisted in calling Bob, although Bob couldn't hear for a long time and finally they made it first with 339 each way and at the end 539. I found using my GW4ALG CW filter made all the difference in hearing Jeff clearly. My attempts at trying to let Bob know that he was being called were thwarted by snails, which have found the upside dustbin I now use for a loading coil cover an attractive place to live. The loading coil was covered in them, causing the SWR to swing wildly up and down as they fried I guess. 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 26042 invoked from network); 1 Jun 2001 21:23:44 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 1 Jun 2001 21:23:44 -0000 Received: (qmail 4389 invoked from network); 1 Jun 2001 21:23:17 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 1 Jun 2001 21:23:17 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 155wIs-0002Y1-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Jun 2001 22:17:54 +0100 Received: from jubilee.ns.sympatico.ca ([142.177.1.6] helo=mail-ns00s0.ns.sympatico.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 155wIr-0002Xv-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Jun 2001 22:17:54 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.83.31]) by mail-ns00s0.ns.sympatico.ca (Post.Office MTA v3.5.3 release 223 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Fri, 1 Jun 2001 18:16:07 -0300 Message-ID: <3B183F64.FE2C5D36@ns.sympatico.ca> Date: Fri, 01 Jun 2001 21:20:36 -0400 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: Re. Beacon References: <000c01c0eac0$85c6e9c0$c932893e@g3aqc> 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 HiLaurieOK I'll look for you73 de John VE1ZJ

Laurie Mayhead wrote:

Hi John and all,Alan says things are quiet also sunspot No. quite low so I will run the beacon tonight. Same freq 135.922. 73s Laurie. 
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29747 invoked from network); 1 Jun 2001 19:18:07 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 1 Jun 2001 19:18:07 -0000 Received: (qmail 29943 invoked from network); 1 Jun 2001 19:17:38 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 1 Jun 2001 19:17:38 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 155uDy-0001OL-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Jun 2001 20:04:42 +0100 Received: from tungsten.btinternet.com ([194.73.73.81]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 155uDx-0001OG-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Jun 2001 20:04:41 +0100 Received: from [213.1.80.31] (helo=default) by tungsten.btinternet.com with smtp (Exim 3.03 #83) id 155uDL-0004hG-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Jun 2001 20:04:05 +0100 Message-ID: <006301c0eacd$a30b5cc0$1f5001d5@default> From: "Alan Melia" To: "LF-Group" Subject: LF: re GBR file Date: Fri, 1 Jun 2001 20:03:20 +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 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 to anyone who has not yet received the GBR file apologies. I have had some 'unable to deliver yet' mesages..... it may be that I have used old addresses....I used addresses out of my address book, except where asked to send to a particular address ...I will check and re address if necessary later tonight. Sorry....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 29823 invoked from network); 1 Jun 2001 17:50:11 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 1 Jun 2001 17:50:11 -0000 Received: (qmail 13116 invoked from network); 1 Jun 2001 17:49:43 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 1 Jun 2001 17:49:43 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 155slP-0000aU-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Jun 2001 18:31:07 +0100 Received: from cmailg1.svr.pol.co.uk ([195.92.195.171]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 155slL-0000aL-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Jun 2001 18:31:03 +0100 Received: from modem-73.porcupine-puffer.dialup.pol.co.uk ([62.137.50.201] helo=g3aqc) by cmailg1.svr.pol.co.uk with smtp (Exim 3.13 #0) id 155skk-00031i-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Jun 2001 18:30:26 +0100 Message-ID: <000c01c0eac0$85c6e9c0$c932893e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF: Re. Beacon Date: Fri, 1 Jun 2001 18:29:33 +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
Hi John and all,
Alan says things are quiet also sunspot No. quite low so I will run the beacon tonight. Same freq 135.922. 73s Laurie.
 
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3822 invoked from network); 1 Jun 2001 12:10:13 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 1 Jun 2001 12:10:13 -0000 Received: (qmail 4937 invoked from network); 1 Jun 2001 12:09:30 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 1 Jun 2001 12:09:30 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 155nUV-000609-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Jun 2001 12:53:19 +0100 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 #2) id 155nUM-000600-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Jun 2001 12:53:10 +0100 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 MAA89568 for ; Fri, 1 Jun 2001 12:42:57 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (ss12.pok.socks.ibm.com [9.14.3.50]) by d06relay02.portsmouth.uk.ibm.com (8.8.8m3/NCO v4.96) with ESMTP id MAA119322 for ; Fri, 1 Jun 2001 12:51:42 +0100 Message-ID: <3B1781DE.FF357FAA@usa.net> Date: Fri, 01 Jun 2001 13:51:58 +0200 From: "Alberto di Bene" 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 LFers, contests, etc. References: <29BDD4F529FCD311B631009027357C4E0225873C@btss103a.swh.sk> 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: Just my two cents (of Euro) on the subject. A contest means competition. While competition is, unfortunately, an unescapable aspect of the human being, I see no reasons to ignite competition in what, up to now, seems to be one of the very few corners left in the ham radio scenario where gentlemanship and reciprocal courtesy still are prevalent. You may call me an idealist. Yes, I am. And I know that idealists are doomed to lose in the grand picture. But sometimes, outright reversing what Macchiavelli wrote a few centuries ago, in a bad English translation, "it's not the end result what counts, but the means used to achieve it". 73 Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3320 invoked from network); 1 Jun 2001 10:57:47 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 1 Jun 2001 10:57:47 -0000 Received: (qmail 468 invoked from network); 1 Jun 2001 10:57:18 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 1 Jun 2001 10:57:18 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 155mU0-0005R6-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Jun 2001 11:48:44 +0100 Received: from phobos.unica.co.uk ([208.239.240.147]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 155mTw-0005R1-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Jun 2001 11:48:40 +0100 Received: from [194.73.73.111] (helo=gadolinium.btinternet.com) by phobos.unica.co.uk with esmtp (Exim 3.13 #2) id 155mTF-0000SX-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Jun 2001 06:47:58 -0400 Received: from [213.1.102.114] (helo=default) by gadolinium.btinternet.com with smtp (Exim 3.03 #83) id 155mGe-0001le-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Jun 2001 11:34:56 +0100 Message-ID: <000501c0ea86$81b1bc00$726601d5@default> From: "Alan Melia" To: "LF-Group" Subject: LF: 73.6kHz RTTY Date: Fri, 1 Jun 2001 11:34:04 +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 John I think Rugby is equiped for ISB (Independent Sideband) so it can send two different data signals on the 'carrier' simultaneously. When only one sideband is in use the signal is fairly clean as far as we are concerned. At my location it doesnt seem to matter which SB is used. However when they are busy and both sidebands are carrying traffic I think there is an amount of intermod, which ,low though it may be, gives us a lot of problems as it spreads the noise and modulation components several hundred Hz either side. 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 16479 invoked from network); 1 Jun 2001 10:47:11 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 1 Jun 2001 10:47:11 -0000 Received: (qmail 152 invoked from network); 1 Jun 2001 10:46:47 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 1 Jun 2001 10:46:47 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 155mJi-0005J4-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Jun 2001 11:38:06 +0100 Received: from ns3.swh.sk ([192.108.125.37]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 155mJc-0005Ix-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Jun 2001 11:38:01 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from hermes.swh.sk (hermes [192.108.125.60]) by ns3.swh.sk (8.11.0/8.11.0) with ESMTP id f51AbBv29847 for ; Fri, 1 Jun 2001 12:37:11 +0200 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 MAA28278 for ; Fri, 1 Jun 2001 12:37:10 +0200 (MET DST) Received: by btss.swh.sk with Internet Mail Service (5.5.2653.19) id ; Fri, 1 Jun 2001 12:37:08 +0200 Message-ID: <29BDD4F529FCD311B631009027357C4E0225873C@btss103a.swh.sk> From: "Gasparik Richard" To: rsgb_lf_group@blacksheep.org Subject: RE: LF: new LFers, contests, etc. Date: Fri, 1 Jun 2001 12:36:59 +0200 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) 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: ...1 point for each new contact...etc...hard to compare the station in UK or western Europe with us, in central Europe. For example in range of 400 km I have worked since January 2000 only 10 LF station. Most of the stations are around 900km from my QTH. OH1TN have the same problem. To stimulate activity on LF we could have an activity contest (or activity weekend) but with rules dependent of the distance between stations worked (rules from VHF contests) or distance dependent points (something like Stew Perry Topband Distance Challenge). But this is not a solution how to increase activity. I'm contester (HF and VHF) and I know that after each big contest activity (like CQWW, ARRL or WPX) follows a deep inactivity. Look on 10m today...sometimes it's very hard to find any US station on the band. It looks like "no propagations"...but in the contest you may work hundred of them. I think we could increase the activity with some DX-peditions and demonstration stations during the hamradio meetings. Maybe some LF AWARDS should increase the activity too....But be careful with "599 QRZ" contest on 136kc... 73 de Rich OM2TW -----Original Message----- From: g3ldo [mailto:g3ldo@ukonline.co.uk] Sent: Thursday, May 31, 2001 11:47 PM To: rsgb_lf_group@blacksheep.org Subject: Re: LF: new LFers, contests, etc. There has been some discussion on methods of increasing activity on the 136kHz band. The main objection to contest activity seems to be that it would degenerate into a '599 QRZ' type contacts. The Worthing radio club runs a contest with its members for activity an a particular band, usually 28MHz, for the number of contacts made over a period of a year. Over a long time span the fast exchanges are irelevant. We could do the same for 136kHz over a period - say from September 1st to April 30th. We could have 1 point for each new contact and a multiplier for each country. To stimulate activity in all modes we could have, say three basic modes 1. CW. 2 QRSS/DFCW. 3. PSK31/wolf. e.g. If you worked G0MRF on CW, QRSS and PSK31 this would count at three separate contacts. I had thought of an additional multiplier for a different continent but this would make it only in the reach of 'big guns'. The objective is to increase activity so I dont think continental multipliers help. What do you think? Regards, Peter, G3LDO e-mail Web From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28833 invoked from network); 1 Jun 2001 09:40:20 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 1 Jun 2001 09:40:20 -0000 Received: (qmail 3440 invoked from network); 1 Jun 2001 09:39:52 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 1 Jun 2001 09:39:52 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 155lHQ-0004km-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Jun 2001 10:31:40 +0100 Received: from bucky-rwcmex.excite.com ([198.3.99.218] helo=bucky.excite.com) by post.thorcom.com with esmtp (Exim 3.16 #2) id 155lHM-0004kh-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Jun 2001 10:31:36 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from bronty ([199.172.153.112]) by bucky.excite.com (InterMail vM.4.01.02.39 201-229-119-122) with ESMTP id <20010601093022.MEPK17977.bucky.excite.com@bronty> for ; Fri, 1 Jun 2001 02:30:22 -0700 Message-ID: <25418077.991387822856.JavaMail.imail@bronty> Date: Fri, 1 Jun 2001 02:29:57 -0700 (PDT) From: "john sexton" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re.LF 73/136 KHz 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 John, I have often heard the RTTY mark 73.56, space 73.64kHz, but it is not there this morning 010601 at 09.28, only the Rugby RTTY at 73.4, which is good clean RTTY at present. 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 17069 invoked from network); 1 Jun 2001 08:48:29 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 1 Jun 2001 08:48:29 -0000 Received: (qmail 24335 invoked from network); 1 Jun 2001 08:47:43 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 1 Jun 2001 08:47:43 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 155kKx-0004C4-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 01 Jun 2001 09:31:15 +0100 X-MSMail-Priority: Normal Received: from tele-post-20.mail.demon.net ([194.217.242.20]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 155kKv-0004Bz-00 for rsgb_lf_group@blacksheep.org; Fri, 01 Jun 2001 09:31:13 +0100 Received: from alg.demon.co.uk ([194.222.171.80]) by tele-post-20.mail.demon.net with esmtp (Exim 2.12 #2) id 155kK5-000BQq-0K for rsgb_lf_group@blacksheep.org; Fri, 1 Jun 2001 08:30:23 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B175274.96A50DE6@alg.demon.co.uk> Date: Fri, 01 Jun 2001 09:29:40 +0100 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: new LFers, contests, etc. References: <22.16aa6566.28424f25@aol.com> <001a01c0ea1b$593165c0$44ca28c3@ericadodd> 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 have observed that: 1) there are many operators within the LF community who are sufficiently self-motivated to put out CQ calls on 136 kHz without having to make a contest out of it; and, 2) the Emails in support of contests on 136 kHz have, in the main, been sent by those who are never heard on the band. I suppose the real test is this: Would a contest on 136 kHz get those in favour of LF contests (but who never/rarely venture on the band), to plug in the key and help provide some signals for newcomers. In my view, the alternative suggestion by Peter G3LDO of an activity event along the lines of the Worthing Radio Club (and, perhaps, the G-QRP Club Winter Sports) events is a good one. [The G-QRP Club event is a very casual affair. There are no points; no multipliers. Instead, the G4DQP Trophy is awarded to the 'best log' as judged by Peter Barville G3XJS, the G-QRP Club Contests Manager. The judging is just as casual - often based on qualitative factors such as: - equipment (is it homebrew/unusual etc.); - antennas (indoor [!]/limited space); - power used and results achieved (it doesn't have to be DX); and, - whether the operator has promoted activity by his/her presence.] Contests and activity events apart, more still needs to be done to increase the chances of hearing other stations on a day-to-day basis. Rich OM2TW has already reported his own efforts to increase the awareness of LF through magazine articles, and setting up demonstration stations. I know that Dick PA0SE has done many presentations about LF to groups of radio amateurs. Indeed, largely through the initiative of PA0SE, the '136 Activity Periods' on Saturday and Sunday mornings have become quite well-known. But those looking for QSOs during the week still find it hard to make QSOs. The problem would seem to be this: Even those at home all day can't spend all their time calling CQ or spinning the dial listening for other stations! Arising out of discussions with Dave G3YMC and Bob G8RW, we would propose the adoption of '136 Activity Times': pre-defined times during the day there is a good chance of hearing other stations. We have discussed the possible establishment of 136 Activity Times at even hours UTC through the day (say, 06:00; 08:00; 10:00 . . . .). Weekends included. What do others feel about this idea? Perhaps the establishment of activity times, and Peter's activity events (in addition to the existing activity periods) would obviate the need for contests, and those wasteful beacons? All supported by publicity, of course. Regards to all, Steve GW4ALG From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23022 invoked from network); 31 May 2001 22:16:15 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 31 May 2001 22:16:15 -0000 Received: (qmail 5700 invoked from network); 31 May 2001 22:15:48 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 31 May 2001 22:15:48 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 155aaD-0007GM-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 31 May 2001 23:06:21 +0100 Received: from jubilee.ns.sympatico.ca ([142.177.1.6] helo=mail-ns00s0.ns.sympatico.ca) by post.thorcom.com with esmtp (Exim 3.16 #2) id 155aaC-0007GB-00 for rsgb_lf_group@blacksheep.org; Thu, 31 May 2001 23:06:20 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ns.sympatico.ca ([142.177.9.87]) by mail-ns00s0.ns.sympatico.ca (Post.Office MTA v3.5.3 release 223 ID# 0-68925U141000L141000S0V35) with ESMTP id ca for ; Thu, 31 May 2001 19:04:48 -0300 Message-ID: <3B16F94C.39EC92AA@ns.sympatico.ca> Date: Thu, 31 May 2001 22:09:16 -0400 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: Re.LF 73/136 KHz References: <000c01c0e9fd$69bf0d20$a872883e@g3aqc> 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 Hi all thanks for info. There is a large rtty station here around 73.6  Will nail down freq tmw .Going out tonight . Be home too late to listen I think.
               73 de John VE1ZJ.  PS what time is sunset in the UK nowadays? Also What is lower band edge? The 73.6 stn here is big es splattery .
Laurie Mayhead wrote:
Hi John and All,Reciprocally is there anything over there that we can listen for? 73s Laurie.