From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 77110 invoked from network); 29 Nov 2003 14:33:08 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by ptb-mailstore with SMTP; 29 Nov 2003 14:33:08 -0000 Received: (qmail 26134 invoked from network); 29 Nov 2003 14:33:08 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 29 Nov 2003 14:33:03 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AQ692-0003Bm-LP for rsgb_lf_group-outgoing@blacksheep.org; Sat, 29 Nov 2003 14:32:24 +0000 Received: from [194.73.73.92] (helo=carbon.btinternet.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AQ692-0003Bd-4F for rsgb_lf_group@blacksheep.org; Sat, 29 Nov 2003 14:32:24 +0000 Received: from host213-122-165-140.in-addr.btopenworld.com ([213.122.165.140] helo=Main) by carbon.btinternet.com with smtp (Exim 3.22 #25) id 1AQ691-0001Yw-00 for rsgb_lf_group@blacksheep.org; Sat, 29 Nov 2003 14:32:23 +0000 X-Bad-Message-ID: no DNS (Main) Message-ID: <001901c3b685$8d70ee80$6507a8c0@Main> From: "Alan Melia" To: "LF-Group" Date: Sat, 29 Nov 2003 14:31:55 -0000 MIME-Version: 1.0 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 Subject: LF: T/A DX Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Hi all, Laurence KL1X is reporting that the path to Europe is improving now and he is hearing DCF39 at audible levels again. CFH has improved here over the last few nights, so I guess we are on the "upslope". Bearing in mind Laurence has only a few more weeks active from Anchorage, it could be a good time to start a "campaign" to crack that route on 136. Laurence has an ARGO window open on 135.92 ish, and is transmitting a "non-amateur" FCC Part 5 beacon signal on 137.77355. ( not seen yet here ) A qso is not possible but reception both ways would be the next best thing. Calsign is WD2XDW Joe VO1NA was active again last night and was providing good QRSS20 signals on 137.777 right up until about 0900z this morning.....Joe will also listen down at the 135.922 end I believe. Mitch VE3OT is also on-air again, running a Part 5 beacon "MP" from London Ontario on 137.7798 Another difficult one is Eric (near to where Laurence will be moving ) on Oklahoma with a 400 W beacon WD2XFX on 137.78077.....I think Eric may still be off air just now with Corona-burn on his aerial insulation. Eric has not yet been heard by Joe, who is on his GC path to the UK. Hopefully now the sudden solar "flare-up" seems to have died away, and geomagnetic activity has quietened, we might see conditions improve to the point of success with some at least of there routes. Joe has already worked Jim two-way.....and is visible almost regardless of the conditions, with a "window" of almost 12 hours now. Really good conditions could produce the first manual morse T/A qso !! Good Hunting !! ....its not illegal yet!! 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 22605 invoked from network); 27 Nov 2003 12:20:05 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 27 Nov 2003 12:20:05 -0000 Received: (qmail 21794 invoked from network); 27 Nov 2003 12:20:05 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 27 Nov 2003 12:19:59 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1APL6K-0007a0-TR for rsgb_lf_group-outgoing@blacksheep.org; Thu, 27 Nov 2003 12:18:28 +0000 Received: from [194.73.73.147] (helo=einsteinium.btinternet.com) by post.thorcom.com with esmtp (Exim 4.14) id 1APL6K-0007Zr-5F for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2003 12:18:28 +0000 Received: from host213-122-118-30.in-addr.btopenworld.com ([213.122.118.30] helo=Main) by einsteinium.btinternet.com with smtp (Exim 3.22 #25) id 1APL6I-0001tY-00 for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2003 12:18:27 +0000 X-Bad-Message-ID: no DNS (Main) Message-ID: <001c01c3b4e0$8ff3cf20$6507a8c0@Main> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org References: <002001c3b4d4$b05039e0$ee9bfea9@oben> Date: Thu, 27 Nov 2003 12:11:04 -0000 MIME-Version: 1.0 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 Subject: LF: Re: Impedancebridge Content-Type: text/plain; charset=Windows-1252; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Hi Peter, I do not know that bridge but I have several others that cover LF. The problem when doing aerial impedance measurements in the presence of a high field from local sources is the difficulty of getting a true deep "null" at bridge balance. A good bridge with a clean sinewave drive (no harmonics) will normally give a null of at least 60dB and often as much as 90dB or more. Any "contamination" of the null will lead to erroneous balance and incorrect measurements. I find that most bridges will expect to be run with a drive of around 2 to 5 volts, and will not be damaged (normally) by about 10volts. If in any doubt this should be filtered to avoid harmonics. 10 volts is about +27dBm in 50ohms , but if Mainflingen is giving -5dBm you only have a margin of 32dB which is not really enough for accurate measurements. I do not know the answer except to build a high-power bridge and use a few watts of drive. A very simple transformer ratio-arm bridge can be built with toroids and driven from an LF QRP TX. You may have to be a little more caeful about the higher voltages that the drive will produce. This way at least you could get a margin of 60 to 80dB and would not need a sensitive null detector though it should be tuned. It is possible that a synchronous detector could be an advantage....the Lock-in amplifier effect giving a very narrow bandwidth. Just a thought that this might be worth trying with a "normal" bridge where it might give significant advantages over a normal wide-band not phase-locked detector. I hope that gives you some ideas Cheers de Alan G3NYK alam.melia@btinternet.com ----- Original Message ----- From: "dj9dw" To: "LF_group" Sent: 27 November 2003 10:53 Subject: LF: Impedancebridge > Hello LFers, > is the Gereral Radio 1656 covering our LF-Band? > Can it take 20dBm or a bit more? My friends in Mainflingen deliver -5 dBm > out of the umbrella here. So I have to run rather high levels for > measurement. > Are there alternative meters? > The modern antennaanalyzers as MJF or AEA quit in my qra. > tks 4 reply es 73 de Peter, dj9dw. > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 949 invoked from network); 14 Nov 2003 12:03:42 -0000 Received: from unknown (HELO murphys.services.quay.plus.net) (212.159.14.225) by mailstore with SMTP; 14 Nov 2003 12:03:42 -0000 Received: (qmail 15565 invoked from network); 14 Nov 2003 12:03:33 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by murphys.services.quay.plus.net with SMTP; 14 Nov 2003 12:03:28 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AKcen-0005ri-LY for rsgb_lf_group-outgoing@blacksheep.org; Fri, 14 Nov 2003 12:02:33 +0000 Received: from [194.73.73.148] (helo=zinc.btinternet.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AKcem-0005rZ-RA for rsgb_lf_group@blacksheep.org; Fri, 14 Nov 2003 12:02:32 +0000 Received: from host213-122-79-3.in-addr.btopenworld.com ([213.122.79.3] helo=Main) by zinc.btinternet.com with smtp (Exim 3.22 #25) id 1AKcel-0002Ul-00 for rsgb_lf_group@blacksheep.org; Fri, 14 Nov 2003 12:02:32 +0000 X-Bad-Message-ID: no DNS (Main) Message-ID: <001f01c3aaa7$30c541c0$6507a8c0@Main> From: "Alan Melia" To: "LF-Group" Date: Fri, 14 Nov 2003 11:55:15 -0000 MIME-Version: 1.0 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 Subject: LF: re Beacons Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Hi Jim, the plot from CFH last night was best early on. I have signals from Joe for most of the night with the best traces around about 0200z when I got an "O" call sign. the water path seems to favour Joe almost regradless of conditions there is something visible from him, unless swamped by local qrm. There could be times when conditions are quite reasonable but with the amount of Solar activity it is almost imposible to predict when. I think that conditions will be beginning to improve just as the big spots come round the limb of the sun's disc again. Some reports suggest that they have been quite active while round the "dark side of the Sun". 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 24009 invoked from network); 1 Nov 2003 11:25:58 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 1 Nov 2003 11:25:58 -0000 Received: (qmail 26778 invoked by uid 10001); 1 Nov 2003 11:25:58 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 1 Nov 2003 11:25:48 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AFtlg-0005de-EK for rsgb_lf_group-outgoing@blacksheep.org; Sat, 01 Nov 2003 11:18:08 +0000 Received: from [194.73.73.81] (helo=tungsten.btinternet.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AFtlf-0005dV-U2 for rsgb_lf_group@blacksheep.org; Sat, 01 Nov 2003 11:18:08 +0000 Received: from host213-122-170-100.in-addr.btopenworld.com ([213.122.170.100] helo=Main) by tungsten.btinternet.com with smtp (Exim 3.22 #23) id 1AFtlf-00008l-00 for rsgb_lf_group@blacksheep.org; Sat, 01 Nov 2003 11:18:07 +0000 X-Bad-Message-ID: no DNS (Main) Message-ID: <002301c3a069$b036d6a0$6507a8c0@Main> From: "Alan Melia" To: "LF-Group" Date: Sat, 1 Nov 2003 11:17:04 -0000 MIME-Version: 1.0 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 Subject: LF: re.re Solar Activity Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Hi John, well I would like to be wrong, but you gotta play 'em as you "read the music" (:-)) Joe's path does seem to be very forgiving. I have noticed before that his signal is detectable almost regardless of the conditions. That 1000kms less distance does seem to be quite crucial. When you think about his signal it does suggest that that the famous Marconi "s" could have been heard for just the same reason. Using a kite he had to listen in daylight ( you cant successfully fly kites at night!! ) and heard the signal around "mid-day". I take it that would have been mid-day Newfoundland time, and at that point daylight D-layer would have been at about its best. I have yet to find geomag data for that winter.....NOAA 's archives dont go back that far !! 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 14603 invoked from network); 25 Nov 2003 18:27:29 -0000 Received: from unknown (HELO netmail01.services.quay.plus.net) (212.159.14.219) by mailstore with SMTP; 25 Nov 2003 18:27:29 -0000 Received: (qmail 23051 invoked by uid 10001); 25 Nov 2003 18:27:29 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail01.services.quay.plus.net with SMTP; 25 Nov 2003 18:27:01 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOhpL-00043b-A0 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 25 Nov 2003 18:22:19 +0000 Received: from [165.212.11.112] (helo=cmsrelay03.mx.net) by post.thorcom.com with smtp (Exim 4.14) id 1AOhpF-0003vc-E3 for rsgb_lf_group@blacksheep.org; Tue, 25 Nov 2003 18:22:13 +0000 X-Fake-Domain: uadvg129.cms.usa.net Received: from uadvg129.cms.usa.net (165.212.11.129) by cmsoutbound.mx.net with SMTP; 25 Nov 2003 18:21:41 -0000 Received: from usa.net [151.42.169.133] by uadvg129.cms.usa.net (ASMTP/dibene@usa.net) via mtad (C8.MAIN.3.11E) with ESMTP id 416HkysVM0110M29; Tue, 25 Nov 2003 18:21:39 GMT X-USANET-Auth: 151.42.169.133 AUTH dibene@usa.net usa.net Message-ID: <3FC39DB7.1010401@usa.net> Date: Tue, 25 Nov 2003 19:21:43 +0100 From: "Alberto di Bene" User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org, lf@amrad.org References: <4F6FB2F5B1C3794EB229F424FE0D50A00CF3CA@unisor> <3FC283C8.1040603@usa.net> In-reply-to: <3FC283C8.1040603@usa.net> Subject: LF: Re: Please forward this mail to Andrew Talbot... [Lf] Frequency standards for LF. The next generation] Content-Type: text/plain; charset=windows-1255; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.8 required=5.0 tests=FAKE_HELO_USA_NET autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 I found myself the answer. There is a project for such a device in the new Andrew Talbot's book : Command, edited by RSGB. 73 Alberto I2PHD Alberto di Bene wrote: > Dan Gani wrote: > >> Dear Andrew Talbot, >> I just read your article from LF concerning 1pps VCXO lock (JUN 2002). >> As you suggested at the paper, would you mind sending me the design. >> >> Thank you, >> >> >> Dan Gani >> Microwave Engineer >> >> > Is that article perhaps available online somewhere ? Thanks. > > 73 Alberto I2PHD > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20535 invoked from network); 24 Nov 2003 22:21:50 -0000 Received: from unknown (HELO murphys.services.quay.plus.net) (212.159.14.225) by mailstore with SMTP; 24 Nov 2003 22:21:50 -0000 Received: (qmail 20704 invoked from network); 24 Nov 2003 22:21:39 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by murphys.services.quay.plus.net with SMTP; 24 Nov 2003 22:21:28 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOP39-0002bx-E0 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 24 Nov 2003 22:19:19 +0000 Received: from [165.212.11.112] (helo=cmsrelay03.mx.net) by post.thorcom.com with smtp (Exim 4.14) id 1AOP37-0002bo-3B for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 22:19:17 +0000 Received: from uadvg129.cms.usa.net (165.212.11.129) by cmsoutbound.mx.net with SMTP; 24 Nov 2003 22:18:43 -0000 Received: from usa.net [151.42.175.172] by uadvg129.cms.usa.net (ASMTP/dibene@usa.net) via mtad (C8.MAIN.3.11E) with ESMTP id 249HkXwsO0096M29; Mon, 24 Nov 2003 22:18:40 GMT X-USANET-Auth: 151.42.175.172 AUTH dibene@usa.net usa.net Message-ID: <3FC283C8.1040603@usa.net> Date: Mon, 24 Nov 2003 23:18:48 +0100 From: "Alberto di Bene" User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: lf@amrad.org, "LF Mailing List" References: <4F6FB2F5B1C3794EB229F424FE0D50A00CF3CA@unisor> In-reply-to: <4F6FB2F5B1C3794EB229F424FE0D50A00CF3CA@unisor> Subject: LF: Re: Please forward this mail to Andrew Talbot... [Lf] Frequency standards for LF. The next generation] Content-Type: text/plain; charset=windows-1255; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.8 required=5.0 tests=FAKE_HELO_USA_NET autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Dan Gani wrote: >Dear Andrew Talbot, >I just read your article from LF concerning 1pps VCXO lock (JUN 2002). >As you suggested at the paper, would you mind sending me the design. > >Thank you, > > >Dan Gani >Microwave Engineer > > Is that article perhaps available online somewhere ? Thanks. 73 Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11059 invoked from network); 5 Nov 2003 22:27:46 -0000 Received: from unknown (HELO netmail01.services.quay.plus.net) (212.159.14.219) by mailstore with SMTP; 5 Nov 2003 22:27:46 -0000 Received: (qmail 9414 invoked by uid 10001); 5 Nov 2003 22:27:45 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail01.services.quay.plus.net with SMTP; 5 Nov 2003 22:27:22 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AHW6G-00049c-SC for rsgb_lf_group-outgoing@blacksheep.org; Wed, 05 Nov 2003 22:26:04 +0000 Received: from [165.212.11.112] (helo=cmsrelay03.mx.net) by post.thorcom.com with smtp (Exim 4.14) id 1AHW6F-00049T-36 for rsgb_lf_group@blacksheep.org; Wed, 05 Nov 2003 22:26:03 +0000 Received: from uadvg137.cms.usa.net (165.212.11.137) by cmsoutbound.mx.net with SMTP; 5 Nov 2003 22:25:30 -0000 Received: from usa.net [151.38.169.146] by uadvg137.cms.usa.net (ASMTP/dibene@usa.net) via mtad (C8.MAIN.3.11E) with ESMTP id 680HkewZC0285M37; Wed, 05 Nov 2003 22:25:28 GMT X-USANET-Auth: 151.38.169.146 AUTH dibene@usa.net usa.net Message-ID: <3FA978D6.2050900@usa.net> Date: Wed, 05 Nov 2003 23:25:26 +0100 From: "Alberto di Bene" User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: "LF Mailing List" Subject: LF: Cat5 cable used as feed line for LF Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.8 required=5.0 tests=FAKE_HELO_USA_NET autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Good evening all, I measured the attenuation of 30 meters of Ethernet cable Cat5, for a possible use as feed line for a loop, and it turned out to be surprisingly low at 137 kHz. Details here : http://dibene.interfree.it/sdradio/cabletest.html 73 Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24766 invoked from network); 24 Nov 2003 22:39:34 -0000 Received: from unknown (HELO marstons.services.quay.plus.net) (212.159.14.223) by mailstore with SMTP; 24 Nov 2003 22:39:34 -0000 Received: (qmail 29746 invoked by uid 10001); 24 Nov 2003 22:39:33 -0000 Content-Transfer-Encoding: 8bit X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-Priority: 3 X-MSMail-Priority: Normal Received: from post.thorcom.com (193.82.116.20) by marstons.services.quay.plus.net with SMTP; 24 Nov 2003 22:38:49 -0000 X-Fake-Domain: majordom X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOPKm-0002so-TK for rsgb_lf_group-outgoing@blacksheep.org; Mon, 24 Nov 2003 22:37:32 +0000 Received: from [212.125.75.12] (helo=mail4.messagelabs.com) by post.thorcom.com with smtp (Exim 4.14) id 1AOPKm-0002sf-5V for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 22:37:32 +0000 X-VirusChecked: Checked X-Env-Sender: William.Ashlock@bocedwards.com X-Msg-Ref: server-22.tower-4.messagelabs.com!1069713429!6711219 X-StarScan-Version: 5.1.13; banners=bocedwards.com,-,- Received: (qmail 30218 invoked from network); 24 Nov 2003 22:37:09 -0000 Received: from ukfw1.ge.boc.com (193.131.2.157) by server-22.tower-4.messagelabs.com with SMTP; 24 Nov 2003 22:37:09 -0000 X-Fake-Domain: exc_wil04.edwards.boc.com Received: from exc_wil04.edwards.boc.com ([162.118.144.226]) by exc_cra03.edwards.boc.com with SMTP (Microsoft Exchange Internet Mail Service Version 5.5.2657.72) id XQXP0MKT; Mon, 24 Nov 2003 22:43:55 -0000 Received: by exc_wil04.edwards.boc.com with Internet Mail Service (5.5.2657.72) id ; Mon, 24 Nov 2003 17:36:50 -0500 X-Bad-Message-ID: no DNS (exc_wil08) Message-ID: From: "Ashlock,William" To: rsgb_lf_group@blacksheep.org Date: Mon, 24 Nov 2003 17:36:50 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2657.72) Subject: RE: LF: Start rsgb_lf_group? Content-Type: text/plain; charset=iso-8859-1; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Hi Dex, >I built the xmitter about 1965 after >reading a an article in an electronics magazine about the Part 15 rules. A >schematic was included using what I believe was a 6AQ5 for the power amp. So I'm >fairly sure the Part 15 rules for the 160-190 kc band was made prior to 1965. Reminds my of a 1958 article in Radio-TV News (I think) describing construction of a CB transceiver using 6AQ5s that I built. Is there any way to figure out which magazine your Lowfer article was in? A lot of us would like to get our hands on it for a 'feel' of what was going on back then. Unfortunately there aren't too many libraries that carry publications going back that far. There was another article in an electronics publication about 20 years ago that I thought described a Lowfer transmitter and receiver (and I told a number of guys I was searching for it in my boxes of old magazines), but after finding it, I was disappointed when it turned out to be for the <10kHz band. Bill A _____________________________________________________________________ This e-mail has been scanned for viruses by MCI's Internet Managed Scanning Services - powered by MessageLabs. For further information visit http://www.mci.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24997 invoked from network); 24 Nov 2003 13:09:57 -0000 Received: from unknown (HELO murphys.services.quay.plus.net) (212.159.14.225) by mailstore with SMTP; 24 Nov 2003 13:09:57 -0000 Received: (qmail 16298 invoked from network); 24 Nov 2003 13:09:46 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by murphys.services.quay.plus.net with SMTP; 24 Nov 2003 13:09:37 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOGSO-0002FO-4h for rsgb_lf_group-outgoing@blacksheep.org; Mon, 24 Nov 2003 13:08:48 +0000 Received: from [212.135.6.11] (helo=smarthost1.mail.uk.easynet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AOGSN-0002FF-Lu for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 13:08:47 +0000 Received: from tnt-2-80.easynet.co.uk ([195.40.196.80] helo=bryan2) by smarthost1.mail.uk.easynet.net with smtp (Exim 4.10) id 1AOGSM-000Moi-00 for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 13:08:46 +0000 X-Bad-Message-ID: no DNS (bryan2) Message-ID: <001601c3b28b$f0c8de00$50c428c3@bryan2> From: "captbrian" To: rsgb_lf_group@blacksheep.org Date: Mon, 24 Nov 2003 13:07:33 -0000 MIME-Version: 1.0 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 Subject: LF: Re: RE: OFF TOPIC but radio. - TX sidetone level adjustment (in RX loadspeaker) Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Thanks for that but the answer proved to be "turn down the control at the side of the box" which left me with red face. Bryan -----Original Message----- From: jan-martin.noding@telenor.com To: rsgb_lf_group@blacksheep.org Date: 24 November 2003 12:41 Subject: LF: RE: OFF TOPIC but radio. - TX sidetone level adjustment (in RX loadspeaker) Usually at FET would solve it, with a series resistor to adjust the sidetone level, and possibly a capacitor if it is a dc level from ground. It is many switch type FETs, those I know and have in my store are 2N7006, VN2408, VN2410, VN2222 Yaesu would probably have used a bipolar device, with questionable effect, particularly in such old transceivers as my FT-902 73 Jan-Martin --- J M Nøding, Datakvalitet, TTS, Kristiansand http://tts.telenor.no/orginfo.html?filterstructureid=13&parent=86&treetopid= 86 Telefon 0047-380-52660, 9077-7126 (QTH: 0047-380-87178) -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of captbrian Sent: 19. november 2003 16:44 To: rsgb_lf_group@blacksheep.org Subject: LF: OFF TOPIC but radio. Does anyone know how to lower the volume of the cw side-tone on a IC706Mk2G ? If I turn down the volume control I need to turn it back up again to hear the incoming signal each over. This gets tedious and wakes the neighbours when I start sending without reducing audio gain .Also may bring MI5 round at 2.00 am with current security jitters. G3GVB -----Original Message----- From: G0MRF@aol.com To: rsgb_lf_group@blacksheep.org Date: 19 November 2003 14:22 Subject: Re: LF: CT1/G3KEV >In a message dated 11/18/03 8:02:22 PM GMT Standard Time, >g3kev.ham@virgin.net writes: > >> Airport security at LEEDS very thorough, when my equipment passed the xray >> machine all the lights and buzzers went off because of one dangerous looking >> item. I had to unpack one bag and the suspect item was my MORSE key. They had >> not encountered one of these devices before. One the way back at FARO >> airport the security xray light up just the same flashing lights etc but the man >> just waved me on, he obviously knows all about amateur radio and morse keys >> !!!!!!!!!!!!! >> >> 73 de Mal/G3KEV >> >> > >Nice to work you on voice on 80m for the first time Mal. > >FB on the security. I find that the X-ray machines hate the solid metal base >of some morse keys. Apparently the density of block of Semtex has a similar >effect on the image displayed on the security monitors. > >73 > >David > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14399 invoked from network); 24 Nov 2003 09:08:47 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 24 Nov 2003 09:08:47 -0000 Received: (qmail 8318 invoked by uid 10001); 24 Nov 2003 09:08:46 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 24 Nov 2003 09:07:18 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOCbT-0006ma-Ho for rsgb_lf_group-outgoing@blacksheep.org; Mon, 24 Nov 2003 09:01:55 +0000 Received: from [212.135.6.11] (helo=smarthost1.mail.uk.easynet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AOCbS-0006mR-UX for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 09:01:55 +0000 Received: from tnt-2-90.easynet.co.uk ([195.40.196.90] helo=bryan2) by smarthost1.mail.uk.easynet.net with smtp (Exim 4.10) id 1AOCbR-00026J-00 for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 09:01:53 +0000 X-Bad-Message-ID: no DNS (bryan2) Message-ID: <002a01c3b269$733577e0$5ac428c3@bryan2> From: "captbrian" To: rsgb_lf_group@blacksheep.org Date: Mon, 24 Nov 2003 09:00:44 -0000 MIME-Version: 1.0 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 Subject: LF: Re: Re: R: CT1/G3KEV Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 I've just invented a new item in the Q-code. QRSP? meaning "are my signals smug and pompous "? and reply QRSP 23/11 your signals are smug and pompous on 23 November (for example) Bryan - G3GVB -----Original Message----- From: Jose E. Ribeiro Sa To: rsgb_lf_group@blacksheep.org Date: 23 November 2003 23:30 Subject: LF: Re: R: CT1/G3KEV >Iam glad you enjoyed my country so much Mal. > >I guess you haven't forgot to ask ANACOM >(our licensing authority) for the special permits >authorizing you for the use of 6m., right ? >Don't forget 137 Khz are also authorized under >a special permit. >By the way this 2 bands are not allowed and included >in the CEPT agreement, so, you cannot TX in Portugal >in 137 Khz and 50 Mhz using the CEPT License, but, >I'm sure you hold a permanent (resident) license. > >I hold a 137 Khz special permit valid until 2005 and it says >135.7 to 137.8 Khz with a max ERP of 1 Watt. >Yes, you read it well 1 WATT only. >Hope they will allow you more when you ask for your permit during >your next visit to the Algarve. > >See you in the LF. > >Jose CT1EEB >VK8CS, former 4W6EB >http://www.qsl.net/ct1eeb > >Da: hamilton mal >A: rsgb_lf_group@blacksheep.org >Oggetto: LF: CT1/G3KEV >Data: martedì 18 novembre 2003 18.14 > >Hi All >I have just returned from CT1/Algarve and had a great time dxing from >there. CT1 is fairly rare, the radio amateur population is low compared to >most other EU countries. I did work three LF operators on the higher >frequencies OK1DTN, G0MRF and G3YMC and several hundred others world wide >on various bands from 160 to 6 metres. >The 6 metre band was interesting from the south coast of Portugal. I worked >a number of ZS6 stations, V51E, TR8CA and RW1AY/MM in the South Atlantic >off the West African coast. I did hear the UK beacon GB3MCB but no UK >stations. >I took all the necessary radio equipment and antennas with me. The portable >station consisted of an ICOM 706 and a small 25A smpsu. The Antenna was an >80 metre doublet up at a height of about 18 metres and a suitable ATU to >match the antenna on all bands to the transceiver. >Everything worked well without snags. At my CT1 qth there was plenty of >room for antennas for the LF bands even 137 khz and next time I might try >it. I have arranged an even better qth next time with a villa and 20 acres >of vineyard for antennas plus the swimming pool for a good earth. >No one around my qth seemed bothered by my antenna mast and antennas. Most >of the Algarve is covered by large 1- 2 metre satellite dishes and other >large poles with TV antennas attached. Antennas of all varities are the >norm there and the odd radio amateur mast and antennas just blends in hi . >A big difference from the UK where some Councils insist on planning consent >for small dishes that you could hardly see and a pole higher than the >normal washing line is prohibited!!!!!!! >It could be time to move South West to a villa with swimming pool, vineyard >and no planning needed for masts and antennas all at affordable prices, >plus good food, good beer and brandy and GOOD SERVICE at the right price. >Airport security at LEEDS very thorough, when my equipment passed the xray >machine all the lights and buzzers went off because of one dangerous >looking item. I had to unpack one bag and the suspect item was my MORSE >key. They had not encountered one of these devices before. One the way back >at FARO airport the security xray light up just the same flashing lights >etc but the man just waved me on, he obviously knows all about amateur >radio and morse keys !!!!!!!!!!!!! > >73 de Mal/G3KEV > > > > > > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22885 invoked from network); 19 Nov 2003 20:41:20 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 19 Nov 2003 20:41:20 -0000 Received: (qmail 8595 invoked by uid 10001); 19 Nov 2003 20:41:20 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 19 Nov 2003 20:40:57 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AMZ69-000323-Je for rsgb_lf_group-outgoing@blacksheep.org; Wed, 19 Nov 2003 20:38:49 +0000 Received: from [212.135.6.11] (helo=smarthost1.mail.uk.easynet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AMZ69-00031u-8G for rsgb_lf_group@blacksheep.org; Wed, 19 Nov 2003 20:38:49 +0000 Received: from tnt-2-201.easynet.co.uk ([195.40.196.201] helo=bryan2) by smarthost1.mail.uk.easynet.net with smtp (Exim 4.10) id 1AMZ67-000DeF-00 for rsgb_lf_group@blacksheep.org; Wed, 19 Nov 2003 20:38:48 +0000 X-Bad-Message-ID: no DNS (bryan2) Message-ID: <001301c3aedc$fd35b760$65c428c3@bryan2> From: "captbrian" To: rsgb_lf_group@blacksheep.org Date: Wed, 19 Nov 2003 20:37:32 -0000 MIME-Version: 1.0 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 Subject: Re: LF: OFF TOPIC but radio. Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 OK. found it. !Adjustment on rear panel. Evenin' all. Bryan -----Original Message----- From: Tom Boucher To: rsgb_lf_group@blacksheep.org Date: 19 November 2003 17:54 Subject: Re: LF: OFF TOPIC but radio. >Brian > >Not sure I understand the problem because the sidetone on mine is >roughly the same volume as incoming signals. i.e. When receiving quietly >so as not to disturb my neighbours in the flat next door at my /A >location, the sidetone is also quiet. > >I wonder if there is a pot to balance the two levels? > >73, Tom G3OLB > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8003 invoked from network); 19 Nov 2003 18:26:05 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 19 Nov 2003 18:26:05 -0000 Received: (qmail 14889 invoked from network); 19 Nov 2003 18:26:00 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 19 Nov 2003 18:25:53 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AMX0f-0001ak-WB for rsgb_lf_group-outgoing@blacksheep.org; Wed, 19 Nov 2003 18:25:01 +0000 Received: from [212.135.6.12] (helo=smarthost2.mail.uk.easynet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AMX0f-0001ab-KW for rsgb_lf_group@blacksheep.org; Wed, 19 Nov 2003 18:25:01 +0000 Received: from tnt-5-215.easynet.co.uk ([195.40.200.215] helo=bryan2) by smarthost2.mail.uk.easynet.net with smtp (Exim 4.10) id 1AMX0d-0001cm-00 for rsgb_lf_group@blacksheep.org; Wed, 19 Nov 2003 18:24:59 +0000 X-Bad-Message-ID: no DNS (bryan2) Message-ID: <003101c3aeca$4be91860$fec828c3@bryan2> From: "captbrian" To: rsgb_lf_group@blacksheep.org Date: Wed, 19 Nov 2003 18:23:55 -0000 MIME-Version: 1.0 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 Subject: Re: LF: OFF TOPIC but radio. Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Then there must be a pot to set somewhere (or maybe a virtual one ) my side-tone would wake the dead even with ear-muffs. Mislaying the manual hasn't helped ( Bryan -----Original Message----- From: Tom Boucher To: rsgb_lf_group@blacksheep.org Date: 19 November 2003 17:54 Subject: Re: LF: OFF TOPIC but radio. >Brian > >Not sure I understand the problem because the sidetone on mine is >roughly the same volume as incoming signals. i.e. When receiving quietly >so as not to disturb my neighbours in the flat next door at my /A >location, the sidetone is also quiet. > >I wonder if there is a pot to balance the two levels? > >73, Tom G3OLB > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28307 invoked from network); 19 Nov 2003 15:46:49 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 19 Nov 2003 15:46:49 -0000 Received: (qmail 10194 invoked by uid 10001); 19 Nov 2003 15:46:48 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 19 Nov 2003 15:45:42 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AMUVc-000863-Lm for rsgb_lf_group-outgoing@blacksheep.org; Wed, 19 Nov 2003 15:44:48 +0000 Received: from [212.135.6.10] (helo=smarthost0.mail.uk.easynet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AMUVc-00085u-3d for rsgb_lf_group@blacksheep.org; Wed, 19 Nov 2003 15:44:48 +0000 Received: from tnt-5-254.easynet.co.uk ([195.40.200.254] helo=bryan2) by smarthost0.mail.uk.easynet.net with smtp (Exim 4.10) id 1AMUVa-00051R-00 for rsgb_lf_group@blacksheep.org; Wed, 19 Nov 2003 15:44:47 +0000 X-Bad-Message-ID: no DNS (bryan2) Message-ID: <000d01c3aeb3$ea2cf620$fec828c3@bryan2> From: "captbrian" To: rsgb_lf_group@blacksheep.org Date: Wed, 19 Nov 2003 15:43:42 -0000 MIME-Version: 1.0 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 Subject: LF: OFF TOPIC but radio. Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Does anyone know how to lower the volume of the cw side-tone on a IC706Mk2G ? If I turn down the volume control I need to turn it back up again to hear the incoming signal each over. This gets tedious and wakes the neighbours when I start sending without reducing audio gain .Also may bring MI5 round at 2.00 am with current security jitters. G3GVB -----Original Message----- From: G0MRF@aol.com To: rsgb_lf_group@blacksheep.org Date: 19 November 2003 14:22 Subject: Re: LF: CT1/G3KEV >In a message dated 11/18/03 8:02:22 PM GMT Standard Time, >g3kev.ham@virgin.net writes: > >> Airport security at LEEDS very thorough, when my equipment passed the xray >> machine all the lights and buzzers went off because of one dangerous looking >> item. I had to unpack one bag and the suspect item was my MORSE key. They had >> not encountered one of these devices before. One the way back at FARO >> airport the security xray light up just the same flashing lights etc but the man >> just waved me on, he obviously knows all about amateur radio and morse keys >> !!!!!!!!!!!!! >> >> 73 de Mal/G3KEV >> >> > >Nice to work you on voice on 80m for the first time Mal. > >FB on the security. I find that the X-ray machines hate the solid metal base >of some morse keys. Apparently the density of block of Semtex has a similar >effect on the image displayed on the security monitors. > >73 > >David > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16642 invoked from network); 19 Nov 2003 00:24:58 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by mailstore with SMTP; 19 Nov 2003 00:24:58 -0000 Received: (qmail 29521 invoked from network); 19 Nov 2003 00:25:05 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by warrior.services.quay.plus.net with SMTP; 19 Nov 2003 00:25:01 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AMG7q-0006c6-8x for rsgb_lf_group-outgoing@blacksheep.org; Wed, 19 Nov 2003 00:23:18 +0000 Received: from [212.135.6.11] (helo=smarthost1.mail.uk.easynet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AMG7p-0006bx-La for rsgb_lf_group@blacksheep.org; Wed, 19 Nov 2003 00:23:17 +0000 Received: from tnt-2-107.easynet.co.uk ([195.40.196.107] helo=bryan2) by smarthost1.mail.uk.easynet.net with smtp (Exim 4.10) id 1AMG7n-0008Oe-00 for rsgb_lf_group@blacksheep.org; Wed, 19 Nov 2003 00:23:16 +0000 X-Bad-Message-ID: no DNS (bryan2) Message-ID: <00f701c3ae33$2f030cc0$9fe486d4@bryan2> From: "captbrian" To: rsgb_lf_group@blacksheep.org Date: Tue, 18 Nov 2003 23:07:23 -0000 MIME-Version: 1.0 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 Subject: LF: Re: CT1/G3KEV Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Security type at Gatwick was an ex- RN telegraphist. My key is ex-Danish railways hence so much nostalgic talk I almost missed the flight LOL. Tip: put it in hand-luggage and you can resolve it there and then. Bryan -----Original Message----- From: hamilton mal To: rsgb_lf_group@blacksheep.org Date: 18 November 2003 20:09 Subject: LF: CT1/G3KEV Hi All I have just returned from CT1/Algarve and had a great time dxing from there. CT1 is fairly rare, the radio amateur population is low compared to most other EU countries. I did work three LF operators on the higher frequencies OK1DTN, G0MRF and G3YMC and several hundred others world wide on various bands from 160 to 6 metres. The 6 metre band was interesting from the south coast of Portugal. I worked a number of ZS6 stations, V51E, TR8CA and RW1AY/MM in the South Atlantic off the West African coast. I did hear the UK beacon GB3MCB but no UK stations. I took all the necessary radio equipment and antennas with me. The portable station consisted of an ICOM 706 and a small 25A smpsu. The Antenna was an 80 metre doublet up at a height of about 18 metres and a suitable ATU to match the antenna on all bands to the transceiver. Everything worked well without snags. At my CT1 qth there was plenty of room for antennas for the LF bands even 137 khz and next time I might try it. I have arranged an even better qth next time with a villa and 20 acres of vineyard for antennas plus the swimming pool for a good earth. No one around my qth seemed bothered by my antenna mast and antennas. Most of the Algarve is covered by large 1- 2 metre satellite dishes and other large poles with TV antennas attached. Antennas of all varities are the norm there and the odd radio amateur mast and antennas just blends in hi . A big difference from the UK where some Councils insist on planning consent for small dishes that you could hardly see and a pole higher than the normal washing line is prohibited!!!!!!! It could be time to move South West to a villa with swimming pool, vineyard and no planning needed for masts and antennas all at affordable prices, plus good food, good beer and brandy and GOOD SERVICE at the right price. Airport security at LEEDS very thorough, when my equipment passed the xray machine all the lights and buzzers went off because of one dangerous looking item. I had to unpack one bag and the suspect item was my MORSE key. They had not encountered one of these devices before. One the way back at FARO airport the security xray light up just the same flashing lights etc but the man just waved me on, he obviously knows all about amateur radio and morse keys !!!!!!!!!!!!! 73 de Mal/G3KEV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9327 invoked from network); 18 Nov 2003 12:34:32 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 18 Nov 2003 12:34:32 -0000 Received: (qmail 28037 invoked from network); 18 Nov 2003 12:34:27 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 18 Nov 2003 12:34:20 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AM51U-0007Yd-Nx for rsgb_lf_group-outgoing@blacksheep.org; Tue, 18 Nov 2003 12:32:00 +0000 Received: from [212.135.6.14] (helo=smarthost4.mail.uk.easynet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AM51U-0007YU-Bp for rsgb_lf_group@blacksheep.org; Tue, 18 Nov 2003 12:32:00 +0000 Received: from tnt-1-244.easynet.co.uk ([195.40.206.244] helo=bryan2) by smarthost4.mail.uk.easynet.net with smtp (Exim 4.10) id 1AM51P-000LiC-00 for rsgb_lf_group@blacksheep.org; Tue, 18 Nov 2003 12:31:55 +0000 X-Bad-Message-ID: no DNS (bryan2) Message-ID: <009801c3adcf$cf79b000$9fe486d4@bryan2> From: "captbrian" To: rsgb_lf_group@blacksheep.org Date: Tue, 18 Nov 2003 11:26:18 -0000 MIME-Version: 1.0 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 Subject: LF: Re: Re: LF. UI signals Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 In the back of my mind is a reference to a US AM broadcast station with an unexplained regular frequency change cycle. bryan -----Original Message----- From: Dave Pick To: rsgb_lf_group@blacksheep.org Date: 18 November 2003 10:48 Subject: LF: Re: LF. UI signals >Peter. > >I've seen that one. DX I think because it fades up at particular times in >the small hours.. > >Dave G3YXM > > >----- Original Message ----- >From: "g3ldo" >To: >Sent: Monday, November 17, 2003 10:37 AM >Subject: LF: LF. UI signals > > >> Hello LF Group, >> Anyone know the origin of the signal in the attached picture? >> Argo set for QRSS30 slow speed. QSB on signal - it had dissapeared in the >> next frame and returned in the following. The regular QSY up and down of >> .5Hz is strange. >> >> Regards, >> Peter, G3LDO >> >> e-mail >> >> >> > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17379 invoked from network); 12 Nov 2003 22:12:48 -0000 Received: from unknown (HELO murphys.services.quay.plus.net) (212.159.14.225) by mailstore with SMTP; 12 Nov 2003 22:12:48 -0000 Received: (qmail 777 invoked from network); 12 Nov 2003 22:12:39 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-Fake-Domain: unknown Received: from unknown (HELO post.thorcom.com) (193.82.116.20) by murphys.services.quay.plus.net with SMTP; 12 Nov 2003 22:12:34 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AK3DN-00014e-E2 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 12 Nov 2003 22:11:53 +0000 Received: from [212.135.6.12] (helo=smarthost2.mail.uk.easynet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AK3DM-00014V-N4 for rsgb_lf_group@blacksheep.org; Wed, 12 Nov 2003 22:11:52 +0000 Received: from tnt-2-114.easynet.co.uk ([195.40.196.114] helo=bryan2) by smarthost2.mail.uk.easynet.net with smtp (Exim 4.10) id 1AK3DK-000Igy-00 for rsgb_lf_group@blacksheep.org; Wed, 12 Nov 2003 22:11:51 +0000 X-Bad-Message-ID: no DNS (bryan2) Message-ID: <004201c3a969$d7dab240$72c428c3@bryan2> From: "captbrian" To: rsgb_lf_group@blacksheep.org Date: Wed, 12 Nov 2003 22:10:53 -0000 MIME-Version: 1.0 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 Subject: Re: LF: Dummy-Load on LW Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 3 I am enjoying this but was there no consideration of the likely load impedances needing to be fed? Surely all the finer points of line loss are wiped out if a mismatch or lossy matching network becomes necessary?? bryan g3gvb ? -----Original Message----- From: Dave Brown To: rsgb_lf_group@blacksheep.org Date: 12 November 2003 20:52 Subject: Re: LF: Dummy-Load on LW > Laurence and others- >While it's quite likely that the standard copper pipe story is true, the >basic physics of the issue are fairly simple- for a given coax outer >diameter it can be shown there is a broad minimum in loss for an outer to >inner diameter ratio of approx. 3.6. With polyethelene dielectric this >gives a characteristic impedance of approx. 50 ohms.(actually nearer >52-sound familiar to you old timers?) Take out the dielectric and the >resulting air line has a characteristic impedance of roughly 75 ohms.(close >to 77) >The loss minimum is very broad-such that in an airline, there is only about >a 10-12% loss increase going from about 50 ohms up to 110 ohms as the >outer/inner diameter ratio changes. So if using standard pipe sizes gave a >50 ohm line, they were only compromising by 10% or so wrpt use of the 77 >ohms ideal figure. >73 >Dave, ZL3FJ > > > > > > >----- Original Message ----- >From: "Laurence KL1X" >To: >Sent: Thursday, November 13, 2003 7:02 AM >Subject: Re: LF: Dummy-Load on LW > > >> I found a thread that says something to the effect that 50 ohm was chosen >> (in the US) during the war period because of the standard diameters >> available in copper tubing at the time (!) - that sort of makes sense D/d >> and all that....must be all hard line! >> >> Laurence >> (too young to rem WW2) >> >> >> >From: "captbrian" >> >Reply-To: rsgb_lf_group@blacksheep.org >> >To: >> >Subject: Re: LF: Dummy-Load on LW >> >Date: Wed, 12 Nov 2003 08:04:52 -0000 >> > >> >which raises the question I have often wondered about. >> > When I started in ham radio all coax was post-war surplus 75 ohm. I >> >assumed >> >in my youth it was to match a free-space dipole !. >> > >> >When I came back to radio after a thirty-year absence in 1990 all was 50 >> >ohm. >> > >> >Who, when and why did someone decide to change to 50 ohm ?? >> > >> >Bryan G3GVB >> >-----Original Message----- >> >From: Hans-Joachim Brandt >> >To: rsgb_lf_group@blacksheep.org >> >Date: 12 November 2003 00:16 >> >Subject: Re: LF: Dummy-Load on LW >> > >> > >> >Dear all, >> > >> >around 1959, when I joined Rohde&Schwarz in Munich, 60 ohms has been the >> >standard cable impedance in Germany for all broadcast and television >> >transmitters in the fifties and for other commercial RF equipment. Cage >and >> >other transmitting antennas were also designed for 60 ohms. I have also >> >built my first amateur radio dummy load for 60 ohms. >> > >> >I do not know exactly the reason for 60 ohms, somebody has told me that >> >this >> >impedance has been a compromise between 50 ohms and 75 ohms, (perhaps >> >following the idea that 75 ohms allows the production of cables with >> >minimum >> >losses whilst 50 ohms would allow to send higher power through a coaxial >> >cable). >> > >> >On the other hand 75 ohms has been used and is still in use for video >> >equipment in TV transmitters and studio equipment; higher video voltages >> >needed for TV modulator stages have often been terminated with 150 ohms >to >> >save power, generating double the voltage with the same current. >> > >> >But in the sixties a change to 50 ohms impedance for RF equipment became >> >standard also in Germany, there was a need to match to the international >> >market standards. >> > >> >Concerning receiving antennas, the first VHF FM and TV antennas in the >> >early >> >fifties in Germany were folded dipoles with a 300 ohms symmetrical cable >> >feed. But soon the folded dipole with reflector (and some directors) >became >> >popular, using 240 ohms symmetrical cable for about two decades (thus >> >confirming Wolf's [DL4YHF] contribution), TV distribution systems in >houses >> >used 60 ohms with a 4:1 balun to connect the antennas (for the TV >receivers >> >with 240 ohms symmetrical input another 1:4 balun was needed to connect >> >them >> >to the 60 ohms house system). Later on TV receivers and TV receiving >> >antennas were changed to 75 Ohms coaxial, CATV systems used 75 ohms from >> >the >> >beginning, the CATV start in Germany has been rather late, about 1984. >> > >> >By the way, a lot of russian Surplus HF equipment which became available >in >> >Germany after the breakdown of the iron curtain, even automatic antenna >> >tuners, were designed for 75 ohms impedance. >> > >> >73 Ha-Jo, DJ1ZB >> > >> > >> >"Walter Blanchard" schrieb: >> > > DK8ND's email raises an interesting point. Can any of our German >friends >> >tell me why an impedance of 60 ohms was popular in Germany for some time >> >but >> >not anywhere else? >> > > >> > > Walter G3JKV. >> > > >> > > >> > > >> > > >> > > --- >> > > >> > > Checked by AVG anti-virus system (http://www.grisoft.com). >> > > Version: 6.0.525 / Virus Database: 322 - Release Date: 09/10/03 >> > >> > >> > >> > >> > >> > >> >> _________________________________________________________________ >> Is your computer infected with a virus? Find out with a FREE computer >virus >> scan from McAfee. Take the FreeScan now! >> http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963 >> >> >> > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 862 invoked from network); 12 Nov 2003 08:09:09 -0000 Received: from unknown (HELO marstons.services.quay.plus.net) (212.159.14.223) by mailstore with SMTP; 12 Nov 2003 08:09:09 -0000 Received: (qmail 25990 invoked by uid 10001); 12 Nov 2003 08:09:07 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by marstons.services.quay.plus.net with SMTP; 12 Nov 2003 08:07:13 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AJq0e-0004rT-AB for rsgb_lf_group-outgoing@blacksheep.org; Wed, 12 Nov 2003 08:05:52 +0000 Received: from [212.135.6.14] (helo=smarthost4.mail.uk.easynet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AJq0d-0004rK-RA for rsgb_lf_group@blacksheep.org; Wed, 12 Nov 2003 08:05:51 +0000 Received: from tnt-13-51.easynet.co.uk ([212.134.22.51] helo=bryan2) by smarthost4.mail.uk.easynet.net with smtp (Exim 4.10) id 1AJq0b-000MVp-00 for rsgb_lf_group@blacksheep.org; Wed, 12 Nov 2003 08:05:50 +0000 X-Bad-Message-ID: no DNS (bryan2) Message-ID: <002c01c3a8f3$a81b8140$331686d4@bryan2> From: "captbrian" To: rsgb_lf_group@blacksheep.org Date: Wed, 12 Nov 2003 08:04:52 -0000 MIME-Version: 1.0 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 Subject: Re: LF: Dummy-Load on LW Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 which raises the question I have often wondered about. When I started in ham radio all coax was post-war surplus 75 ohm. I assumed in my youth it was to match a free-space dipole !. When I came back to radio after a thirty-year absence in 1990 all was 50 ohm. Who, when and why did someone decide to change to 50 ohm ?? Bryan G3GVB -----Original Message----- From: Hans-Joachim Brandt To: rsgb_lf_group@blacksheep.org Date: 12 November 2003 00:16 Subject: Re: LF: Dummy-Load on LW Dear all, around 1959, when I joined Rohde&Schwarz in Munich, 60 ohms has been the standard cable impedance in Germany for all broadcast and television transmitters in the fifties and for other commercial RF equipment. Cage and other transmitting antennas were also designed for 60 ohms. I have also built my first amateur radio dummy load for 60 ohms. I do not know exactly the reason for 60 ohms, somebody has told me that this impedance has been a compromise between 50 ohms and 75 ohms, (perhaps following the idea that 75 ohms allows the production of cables with minimum losses whilst 50 ohms would allow to send higher power through a coaxial cable). On the other hand 75 ohms has been used and is still in use for video equipment in TV transmitters and studio equipment; higher video voltages needed for TV modulator stages have often been terminated with 150 ohms to save power, generating double the voltage with the same current. But in the sixties a change to 50 ohms impedance for RF equipment became standard also in Germany, there was a need to match to the international market standards. Concerning receiving antennas, the first VHF FM and TV antennas in the early fifties in Germany were folded dipoles with a 300 ohms symmetrical cable feed. But soon the folded dipole with reflector (and some directors) became popular, using 240 ohms symmetrical cable for about two decades (thus confirming Wolf's [DL4YHF] contribution), TV distribution systems in houses used 60 ohms with a 4:1 balun to connect the antennas (for the TV receivers with 240 ohms symmetrical input another 1:4 balun was needed to connect them to the 60 ohms house system). Later on TV receivers and TV receiving antennas were changed to 75 Ohms coaxial, CATV systems used 75 ohms from the beginning, the CATV start in Germany has been rather late, about 1984. By the way, a lot of russian Surplus HF equipment which became available in Germany after the breakdown of the iron curtain, even automatic antenna tuners, were designed for 75 ohms impedance. 73 Ha-Jo, DJ1ZB "Walter Blanchard" schrieb: > DK8ND's email raises an interesting point. Can any of our German friends tell me why an impedance of 60 ohms was popular in Germany for some time but not anywhere else? > > Walter G3JKV. > > > > > --- > > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.525 / Virus Database: 322 - Release Date: 09/10/03 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26585 invoked from network); 11 Nov 2003 21:44:19 -0000 Received: from netmail00.services.quay.plus.net (212.159.14.218) by mailstore with SMTP; 11 Nov 2003 21:44:19 -0000 Received: (qmail 8320 invoked from network); 11 Nov 2003 21:44:19 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 11 Nov 2003 21:44:12 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AJgIa-0004Yz-QU for rsgb_lf_group-outgoing@blacksheep.org; Tue, 11 Nov 2003 21:43:44 +0000 Received: from [212.135.6.11] (helo=smarthost1.mail.uk.easynet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AJgIa-0004Yq-DS for rsgb_lf_group@blacksheep.org; Tue, 11 Nov 2003 21:43:44 +0000 Received: from tnt-5-228.easynet.co.uk ([195.40.200.228] helo=bryan2) by smarthost1.mail.uk.easynet.net with smtp (Exim 4.10) id 1AJgIX-0009AF-00 for rsgb_lf_group@blacksheep.org; Tue, 11 Nov 2003 21:43:42 +0000 X-Bad-Message-ID: no DNS (bryan2) Message-ID: <002601c3a89c$beb4f280$e4c828c3@bryan2> From: "captbrian" To: rsgb_lf_group@blacksheep.org Date: Tue, 11 Nov 2003 21:42:41 -0000 MIME-Version: 1.0 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 Subject: LF: Re: Re: Dummy loads at LF Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 What does SAQ use? Bryan G3GVB -----Original Message----- From: Johan Bodin To: rsgb_lf_group@blacksheep.org Date: 11 November 2003 20:56 Subject: LF: Re: Dummy loads at LF Dear group, at a wavelength of 2200m I can't see any reason why a bucket of salt water can't be used as a "poor man's dummy load". Also, water needs a lot of energy to heat up. At 4.18 kJ/(kg*K) a 10 liter bucket will take a kWh, or so, before reaching the boiling point... :-) By the way, the speed (frequency) control system at SAQ contains servo controlled "liquid rheostats". Any ideas for electrode material? 73 Johan SM6LKM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27133 invoked from network); 27 Nov 2003 13:15:14 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 27 Nov 2003 13:15:14 -0000 Received: (qmail 10645 invoked from network); 27 Nov 2003 13:15:13 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 27 Nov 2003 13:15:07 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1APLyA-0008Pc-1d for rsgb_lf_group-outgoing@blacksheep.org; Thu, 27 Nov 2003 13:14:06 +0000 Received: from [195.130.225.150] (helo=mail-4.tiscali.it) by post.thorcom.com with esmtp (Exim 4.14) id 1APLy9-0008PT-1c for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2003 13:14:05 +0000 Received: from [62.101.126.193] by mail-4.tiscali.it with HTTP; Thu, 27 Nov 2003 14:13:32 +0100 Date: Thu, 27 Nov 2003 14:13:32 +0100 Message-ID: <3FC5977400001852@mail-4.tiscali.it> In-reply-to: <002001c3b4d4$b05039e0$ee9bfea9@oben> From: cla.po@tiscali.it To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Subject: RE: LF: Impedancebridge Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 >-- Messaggio Originale -- >From: dj9dw@t-online.de (dj9dw) >To: "LF_group" >Date: Thu, 27 Nov 2003 11:53:27 +0100 >Subject: LF: Impedancebridge >Reply-To: rsgb_lf_group@blacksheep.org > > >Hello LFers, >is the Gereral Radio 1656 covering our LF-Band? I don't know. >Can it take 20dBm or a bit more? My friends in Mainflingen deliver -5 dBm >out of the umbrella here. So I have to run rather high levels for >measurement. >Are there alternative meters? May be that any impedance bridge using as RF detector some selective level meter (pegelmesser) can help you for this measure. 73 de Claudio, ik2pii __________________________________________________________________ Tiscali ADSL SENZA CANONE, paghi solo quando navighi! E in più il modem e' GRATIS! Abbonati subito. http://point.tiscali.it/adsl/index.shtml From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4287 invoked from network); 20 Nov 2003 01:04:16 -0000 Received: from unknown (HELO netmail01.services.quay.plus.net) (212.159.14.219) by mailstore with SMTP; 20 Nov 2003 01:04:16 -0000 Received: (qmail 7365 invoked by uid 10001); 20 Nov 2003 01:04:15 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail01.services.quay.plus.net with SMTP; 20 Nov 2003 01:04:02 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AMdD8-0005zI-WC for rsgb_lf_group-outgoing@blacksheep.org; Thu, 20 Nov 2003 01:02:18 +0000 Received: from [203.109.254.44] (helo=grunt4.ihug.co.nz) by post.thorcom.com with esmtp (Exim 4.14) id 1AMdD7-0005z9-6j for rsgb_lf_group@blacksheep.org; Thu, 20 Nov 2003 01:02:17 +0000 Received: from 203-173-240-37.adsl.ihug.co.nz (athlon) [203.173.240.37] by grunt4.ihug.co.nz with smtp (Exim 3.35 #1 (Debian)) id 1AMdD1-0007RV-00; Thu, 20 Nov 2003 14:02:11 +1300 X-Bad-Message-ID: no DNS (athlon) Message-ID: <1d0201c3af01$dfdbd4e0$6a00a8c0@athlon> From: "Dave Brown" To: rsgb_lf_group@blacksheep.org References: <000601c3aee7$723ec2e0$2bc428c3@erica> Date: Thu, 20 Nov 2003 14:01:47 +1300 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: Re: LF: CT1/G3KEV Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Had a play with one of the 'x-ray' machines recently 'cos of an EIP counter I was hand luggaging home that caused a few raised eyebrows- I was quite early for the flight and there was no-one else in the queue so I spent about 5 minutes with the machine operator trying all the options out-after I showed them what it was. They can use varying degrees of apparent visual depth and different artificial colours, so the screen picture can be quite complex. It's a bit like having a camera with a small depth of field and adjusting the zoom so you can start at the top of something and look at all the 'layers' on the way through to the bottom as the 'zoom' gets changed. The end result is that the innards of most items can be seen in quite some detail. But thick solid metallic things that can't be readily seen inside of (e.g. the power transformer in the counter in this case) are definitely subject to more than the average scrutiny! 73 Dave ZL3FJ ----- Original Message ----- From: "g3ldo" To: Sent: Thursday, November 20, 2003 10:52 AM Subject: Re: LF: CT1/G3KEV > > Dave, G0MRF said: > > >I find that the X-ray machines hate the solid metal base of some morse > keys. > >Apparently the density of block of Semtex has a similar effect on > >the image displayed on the security monitors. > > Can these machines tell the difference between a metal box of components, > such as a rig, ATU or PSU and a solid block of a CW key? > I was more concerned about weight (as the XYL seemed to want to pack her > entire wardrobe) so I used a lightweight CW paddle that was fixed to a > clipboard that contained all the amateur radio papers. > I put all my ham radio gear into a separate small case which I never saw > again until it reluctantly appeared at baggage reclaim. I carried my laptop > and antenna mast (fibre glass telescopic roach pole, used as a walking > stick) as hand luggage. I specifically asked that the laptop didn't go > through the xray machine so that was the only item that got looked at. > > Peter G3LDO > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16800 invoked from network); 12 Nov 2003 20:20:23 -0000 Received: from netmail00.services.quay.plus.net (212.159.14.218) by mailstore with SMTP; 12 Nov 2003 20:20:23 -0000 Received: (qmail 14089 invoked from network); 12 Nov 2003 20:20:22 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 12 Nov 2003 20:20:15 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AK1SI-0007ZV-Nx for rsgb_lf_group-outgoing@blacksheep.org; Wed, 12 Nov 2003 20:19:10 +0000 Received: from [203.109.254.43] (helo=grunt3.ihug.co.nz) by post.thorcom.com with esmtp (Exim 4.14) id 1AK1SG-0007ZL-Kl for rsgb_lf_group@blacksheep.org; Wed, 12 Nov 2003 20:19:09 +0000 Received: from 203-173-240-91.adsl.ihug.co.nz (athlon) [203.173.240.91] by grunt3.ihug.co.nz with smtp (Exim 3.35 #1 (Debian)) id 1AK1SA-0007ie-00; Thu, 13 Nov 2003 09:19:02 +1300 X-Bad-Message-ID: no DNS (athlon) Message-ID: <0ea301c3a95a$5d8abcb0$6a00a8c0@athlon> From: "Dave Brown" To: rsgb_lf_group@blacksheep.org References: Date: Thu, 13 Nov 2003 09:20:07 +1300 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: Re: LF: Dummy-Load on LW Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Laurence and others- While it's quite likely that the standard copper pipe story is true, the basic physics of the issue are fairly simple- for a given coax outer diameter it can be shown there is a broad minimum in loss for an outer to inner diameter ratio of approx. 3.6. With polyethelene dielectric this gives a characteristic impedance of approx. 50 ohms.(actually nearer 52-sound familiar to you old timers?) Take out the dielectric and the resulting air line has a characteristic impedance of roughly 75 ohms.(close to 77) The loss minimum is very broad-such that in an airline, there is only about a 10-12% loss increase going from about 50 ohms up to 110 ohms as the outer/inner diameter ratio changes. So if using standard pipe sizes gave a 50 ohm line, they were only compromising by 10% or so wrpt use of the 77 ohms ideal figure. 73 Dave, ZL3FJ ----- Original Message ----- From: "Laurence KL1X" To: Sent: Thursday, November 13, 2003 7:02 AM Subject: Re: LF: Dummy-Load on LW > I found a thread that says something to the effect that 50 ohm was chosen > (in the US) during the war period because of the standard diameters > available in copper tubing at the time (!) - that sort of makes sense D/d > and all that....must be all hard line! > > Laurence > (too young to rem WW2) > > > >From: "captbrian" > >Reply-To: rsgb_lf_group@blacksheep.org > >To: > >Subject: Re: LF: Dummy-Load on LW > >Date: Wed, 12 Nov 2003 08:04:52 -0000 > > > >which raises the question I have often wondered about. > > When I started in ham radio all coax was post-war surplus 75 ohm. I > >assumed > >in my youth it was to match a free-space dipole !. > > > >When I came back to radio after a thirty-year absence in 1990 all was 50 > >ohm. > > > >Who, when and why did someone decide to change to 50 ohm ?? > > > >Bryan G3GVB > >-----Original Message----- > >From: Hans-Joachim Brandt > >To: rsgb_lf_group@blacksheep.org > >Date: 12 November 2003 00:16 > >Subject: Re: LF: Dummy-Load on LW > > > > > >Dear all, > > > >around 1959, when I joined Rohde&Schwarz in Munich, 60 ohms has been the > >standard cable impedance in Germany for all broadcast and television > >transmitters in the fifties and for other commercial RF equipment. Cage and > >other transmitting antennas were also designed for 60 ohms. I have also > >built my first amateur radio dummy load for 60 ohms. > > > >I do not know exactly the reason for 60 ohms, somebody has told me that > >this > >impedance has been a compromise between 50 ohms and 75 ohms, (perhaps > >following the idea that 75 ohms allows the production of cables with > >minimum > >losses whilst 50 ohms would allow to send higher power through a coaxial > >cable). > > > >On the other hand 75 ohms has been used and is still in use for video > >equipment in TV transmitters and studio equipment; higher video voltages > >needed for TV modulator stages have often been terminated with 150 ohms to > >save power, generating double the voltage with the same current. > > > >But in the sixties a change to 50 ohms impedance for RF equipment became > >standard also in Germany, there was a need to match to the international > >market standards. > > > >Concerning receiving antennas, the first VHF FM and TV antennas in the > >early > >fifties in Germany were folded dipoles with a 300 ohms symmetrical cable > >feed. But soon the folded dipole with reflector (and some directors) became > >popular, using 240 ohms symmetrical cable for about two decades (thus > >confirming Wolf's [DL4YHF] contribution), TV distribution systems in houses > >used 60 ohms with a 4:1 balun to connect the antennas (for the TV receivers > >with 240 ohms symmetrical input another 1:4 balun was needed to connect > >them > >to the 60 ohms house system). Later on TV receivers and TV receiving > >antennas were changed to 75 Ohms coaxial, CATV systems used 75 ohms from > >the > >beginning, the CATV start in Germany has been rather late, about 1984. > > > >By the way, a lot of russian Surplus HF equipment which became available in > >Germany after the breakdown of the iron curtain, even automatic antenna > >tuners, were designed for 75 ohms impedance. > > > >73 Ha-Jo, DJ1ZB > > > > > >"Walter Blanchard" schrieb: > > > DK8ND's email raises an interesting point. Can any of our German friends > >tell me why an impedance of 60 ohms was popular in Germany for some time > >but > >not anywhere else? > > > > > > Walter G3JKV. > > > > > > > > > > > > > > > --- > > > > > > Checked by AVG anti-virus system (http://www.grisoft.com). > > > Version: 6.0.525 / Virus Database: 322 - Release Date: 09/10/03 > > > > > > > > > > > > > > _________________________________________________________________ > Is your computer infected with a virus? Find out with a FREE computer virus > scan from McAfee. Take the FreeScan now! > http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963 > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 84395 invoked from network); 30 Nov 2003 16:09:06 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by ptb-mailstore with SMTP; 30 Nov 2003 16:09:06 -0000 Received: (qmail 16499 invoked from network); 30 Nov 2003 16:09:06 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 30 Nov 2003 16:09:01 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AQU7I-00033Q-Fg for rsgb_lf_group-outgoing@blacksheep.org; Sun, 30 Nov 2003 16:08:12 +0000 Received: from [194.73.73.111] (helo=gadolinium.btinternet.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AQU7H-00033H-Nw for rsgb_lf_group@blacksheep.org; Sun, 30 Nov 2003 16:08:11 +0000 Received: from host81-129-25-15.in-addr.btopenworld.com ([81.129.25.15] helo=dellboy) by gadolinium.btinternet.com with smtp (Exim 3.22 #25) id 1AQU7H-0005mY-00 for rsgb_lf_group@blacksheep.org; Sun, 30 Nov 2003 16:08:11 +0000 X-Bad-Message-ID: no DNS (dellboy) Message-ID: <001701c3b75c$6ac31570$1f00a8c0@dellboy> From: "Dave Pick" To: "LF Group" References: <639D20177889D41198A600508BAD3CA10864149F@capella3.oss.akzonobel.nl> Date: Sun, 30 Nov 2003 16:10:04 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: Re: RE: new version of QRS Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Yes indeed, I second that! It is available for download at http://www.wireless.org.uk/software.htm as a mirror 73 Dave G3YXM. > Thanks Rik, > > Wil PA0BWL > > -----Original Message----- > From: Rik Strobbe [mailto:rik.strobbe@fys.kuleuven.ac.be] > Sent: vrijdag 28 november 2003 11:40 > To: rsgb_lf_group@blacksheep.org > Cc: ik1zyw@yahoo.com; aflowers@frontiernet.net; johan_smet@pandora.be > Subject: LF: new version of QRS > > > I just released version 4.02 of QRS. > New features /changes: > ***** Changes from version 4.01 to 4.02 (November 2003) ***** > 1. Message size increased for 70 chararcters to 250 characters (suggestion > of ON5EX) > 2. Soundcard can be used for DFCW tones and CW sidetone (suggestion of K0SM) > 3. AutoStart feature allows automatic and unattended beacon mode > (suggestion of IK1ZYW) > 4. Some minor cosmetics > > QRS v4.02 can be downloaded from my website http://www.qsl.net/on7yd/ > (click on software) or direct http://www.qsl.net/on7yd/zip/qrs402.zip > Those who have a copy of QRS available for download on their websites are > invited to copy the new version from the above site and make it available > on their sites. > > 73, Rik ON7YD > > -------------------------------------------------------------------- > This message, including attached files, may contain confidential > information and is intended only for the use by the individual > and/or the entity to which it is addressed. Any unauthorized use, > dissemination of, or copying of the information contained herein is > not allowed and may lead to irreparable harm and damage for which > you may be held liable. If you receive this message in error or if > it is intended for someone else please notify the sender by > returning this e-mail immediately and delete the message. > -------------------------------------------------------------------- > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17621 invoked from network); 27 Nov 2003 09:19:33 -0000 Received: from netmail00.services.quay.plus.net (212.159.14.218) by mailstore with SMTP; 27 Nov 2003 09:19:33 -0000 Received: (qmail 17172 invoked from network); 27 Nov 2003 09:19:33 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 27 Nov 2003 09:19:28 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1APICQ-0004TS-Ev for rsgb_lf_group-outgoing@blacksheep.org; Thu, 27 Nov 2003 09:12:34 +0000 Received: from [194.73.73.81] (helo=tungsten.btinternet.com) by post.thorcom.com with esmtp (Exim 4.14) id 1APICP-0004TJ-2B for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2003 09:12:33 +0000 Received: from host81-129-25-15.in-addr.btopenworld.com ([81.129.25.15] helo=dellboy) by tungsten.btinternet.com with smtp (Exim 3.22 #25) id 1APICL-0007W3-00 for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2003 09:12:29 +0000 X-Bad-Message-ID: no DNS (dellboy) Message-ID: <001d01c3b4c6$de632670$1f00a8c0@dellboy> From: "Dave Pick" To: rsgb_lf_group@blacksheep.org References: <006b01c3b46b$719d7230$0300a8c0@bikerz.local> Date: Thu, 27 Nov 2003 09:14:29 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: Re: Newbie question Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Martyn. Could it be one of those water softener things that are supposed to achieve results by some magical means and consist of a box of electronics and some wires which get wrapped around the incoming water pipe? The other thing I have heard of is central heating oil-tank level sensors. Try a loop aerial and see if you can DF it. It will hopefully come from a point source so you should be able to use a noise canceller but it's difficult to erect a big enough noise aerial for LF. Is it audible on medium or long wave BC bands? If so you could take a walk with your trusty transistor radio and see if you can track it down. That's my tuppenceworth... 73 Dave G3YXM ----- Original Message ----- From: "Martyn" To: Sent: Wednesday, November 26, 2003 10:20 PM Subject: LF: Newbie question > Hi folks, > > I have been monitoring 137 for a couple of weeks now, but for the last week > or so I have been getting this consistent 1 second broadband (from about > 133khz to about 139khz pulse. see attached jpg. Is this typical? or better > still can anyone suggest what it might be please? DCF39 is clear on the > trace and very strong.. Even better, can I get rid of it. The next step is > probably a noise canceller but I'm not sure how effective this will be on a > broadband noise pulse > > Ant is a dual vertical wire to approx 10m high with a pair of 18m horizontal > Capacity wires seperated by abt 800mm in an offset 'T' formation. Looding > coil is about 5mH. Rx pre-amplifier is the Mk1 G0MRF kit feeding my FT-920 > HF rig. > > Thanks > > Martyn > > ---------------------------------------- > Martyn Kinder G0CZD > > mailto:martyn@czd.org.uk > > http://www.czd.org.uk > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27827 invoked from network); 18 Nov 2003 10:46:23 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 18 Nov 2003 10:46:23 -0000 Received: (qmail 14375 invoked by uid 10001); 18 Nov 2003 10:46:22 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 18 Nov 2003 10:45:27 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AM3HY-0006Ll-Kf for rsgb_lf_group-outgoing@blacksheep.org; Tue, 18 Nov 2003 10:40:28 +0000 Received: from [194.73.73.176] (helo=protactinium.btinternet.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AM3HW-0006Lc-Ss for rsgb_lf_group@blacksheep.org; Tue, 18 Nov 2003 10:40:27 +0000 Received: from host81-129-25-15.in-addr.btopenworld.com ([81.129.25.15] helo=dellboy) by protactinium.btinternet.com with smtp (Exim 3.22 #25) id 1AM3HV-0006YK-00 for rsgb_lf_group@blacksheep.org; Tue, 18 Nov 2003 10:40:25 +0000 X-Bad-Message-ID: no DNS (dellboy) Message-ID: <000801c3adc0$a7725580$1f00a8c0@dellboy> From: "Dave Pick" To: rsgb_lf_group@blacksheep.org References: <000701c3a940$8fd04ce0$5de486d4@erica> <000801c3a9d0$3b94b900$631686d4@erica> <000701c3acf7$04109100$88c828c3@erica> Date: Tue, 18 Nov 2003 10:42:24 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: Re: LF. UI signals Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Peter. I've seen that one. DX I think because it fades up at particular times in the small hours.. Dave G3YXM ----- Original Message ----- From: "g3ldo" To: Sent: Monday, November 17, 2003 10:37 AM Subject: LF: LF. UI signals > Hello LF Group, > Anyone know the origin of the signal in the attached picture? > Argo set for QRSS30 slow speed. QSB on signal - it had dissapeared in the > next frame and returned in the following. The regular QSY up and down of > .5Hz is strange. > > Regards, > Peter, G3LDO > > e-mail > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28155 invoked from network); 27 Nov 2003 09:26:26 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 27 Nov 2003 09:26:26 -0000 Received: (qmail 20669 invoked from network); 27 Nov 2003 09:26:25 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 27 Nov 2003 09:26:20 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1APIOE-0004tK-UC for rsgb_lf_group-outgoing@blacksheep.org; Thu, 27 Nov 2003 09:24:46 +0000 Received: from [194.73.73.81] (helo=tungsten.btinternet.com) by post.thorcom.com with esmtp (Exim 4.14) id 1APIOE-0004t9-I4 for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2003 09:24:46 +0000 Received: from host213-122-109-44.in-addr.btopenworld.com ([213.122.109.44] helo=dave) by tungsten.btinternet.com with esmtp (Exim 3.22 #25) id 1APIOD-00024V-00 for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2003 09:24:46 +0000 From: "Dave Sergeant" To: rsgb_lf_group@blacksheep.org Date: Thu, 27 Nov 2003 09:26:06 -0000 MIME-Version: 1.0 Message-ID: <3FC5C32E.19892.A1EEB2@localhost> In-reply-to: <006b01c3b46b$719d7230$0300a8c0@bikerz.local> X-Mailer: Pegasus Mail for Windows (v4.12a) Content-Description: Mail message body Subject: Re: LF: Newbie question Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 On 26 Nov 2003 at 22:20, Martyn wrote: > I have been monitoring 137 for a couple of weeks now, but for the last > week or so I have been getting this consistent 1 second broadband > (from about 133khz to about 139khz pulse. see attached jpg. Is this > typical? or better still can anyone suggest what it might be please? My gut feeling is that this is radiation from a neighbouring TV (or even your own??). A growing problem which has restricted my operation on 136 for some time. Does it only appear during 'tv listening hours' or all the time, bearing in mind that some sets generate the QRM even in standby? Have you noticed a neighbour taking delivery of a new set recently? I did start a page on my website sometime ago for listing rogue sets, but have had virtually no input for it - see http://www.btinternet.com/~dsergeant/tvqrm.htm. 73 Dave G3YMC dsergeant@btinternet.com http://www.btinternet.com/~dsergeant From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 6145 invoked from network); 25 Nov 2003 09:41:18 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by mailstore with SMTP; 25 Nov 2003 09:41:18 -0000 Received: (qmail 11542 invoked from network); 25 Nov 2003 09:41:25 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by warrior.services.quay.plus.net with SMTP; 25 Nov 2003 09:41:20 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOZcF-00046V-6u for rsgb_lf_group-outgoing@blacksheep.org; Tue, 25 Nov 2003 09:36:15 +0000 Received: from [194.73.73.92] (helo=carbon.btinternet.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AOZcE-00046M-Om for rsgb_lf_group@blacksheep.org; Tue, 25 Nov 2003 09:36:14 +0000 Received: from host213-122-134-74.in-addr.btopenworld.com ([213.122.134.74] helo=dave) by carbon.btinternet.com with esmtp (Exim 3.22 #25) id 1AOZcD-0001rC-00 for rsgb_lf_group@blacksheep.org; Tue, 25 Nov 2003 09:36:14 +0000 From: "Dave Sergeant" To: rsgb_lf_group@blacksheep.org Date: Tue, 25 Nov 2003 09:37:22 -0000 MIME-Version: 1.0 Message-ID: <3FC322D2.6592.AC8393@localhost> In-reply-to: <014401c3b29e$1babb2c0$15309bd2@vaiosn> X-Mailer: Pegasus Mail for Windows (v4.12a) Content-Description: Mail message body Subject: Re: LF: PA0SE Field Srength Meter for 137 kHz Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=HTML_MESSAGE autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 On 24 Nov 2003 at 7:17, Stewart Nelson wrote: > Dick's post, made with Eudora, contained this HTML fragment: > > The correct formula is:

> P = 0.0111(E *d)2 > in which ... > > Depending on your mail reader and/or browser, the superscript 2 may > not have displayed correctly. > > The correct formula is: P = 0.0111 * (E * d) ** 2 > or P equals 0.0111 times ((E times d) squared) And remember that many of us choose to display only the plain text version of HTML mails. There are no superscripts in good old plain text! I see if I select the HTML view in Pegasus it displays a small 2 but not as a superscript. I guess this is what you call WYSINWYG (inverse of WYSIWYG)! 73 Dave G3YMC dsergeant@btinternet.com http://www.btinternet.com/~dsergeant From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13501 invoked from network); 5 Nov 2003 19:11:47 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 5 Nov 2003 19:11:47 -0000 Received: (qmail 25343 invoked from network); 5 Nov 2003 19:11:47 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 X-Fake-Domain: unknown X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from unknown (HELO post.thorcom.com) (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 5 Nov 2003 19:11:41 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AHT2H-0001ff-KD for rsgb_lf_group-outgoing@blacksheep.org; Wed, 05 Nov 2003 19:09:45 +0000 Received: from [194.73.73.81] (helo=tungsten.btinternet.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AHT2H-0001fW-0o for rsgb_lf_group@blacksheep.org; Wed, 05 Nov 2003 19:09:45 +0000 Received: from host213-122-65-19.in-addr.btopenworld.com ([213.122.65.19] helo=dave) by tungsten.btinternet.com with esmtp (Exim 3.22 #23) id 1AHT2G-0006Co-00 for rsgb_lf_group@blacksheep.org; Wed, 05 Nov 2003 19:09:44 +0000 From: "Dave Sergeant" To: rsgb_lf_group@blacksheep.org Date: Wed, 05 Nov 2003 19:09:37 -0000 MIME-Version: 1.0 Message-ID: <3FA94AF1.2956.2BC6B87@localhost> X-Mailer: Pegasus Mail for Windows (v4.12a) Content-Description: Mail message body Subject: LF: CT/G3KEV Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 I guess Mal wasn't responsible for the QRaM in the Scarborough area, I just worked him from the Argarve on 18MHz.. Mal says he has no LF gear down there this time but may do on his next trip. He has plenty of room for antennas, and is at present using a 80m doublet on all the HF bands. 73 Dave G3YMC dsergeant@btinternet.com http://www.btinternet.com/~dsergeant From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12861 invoked from network); 15 Nov 2003 16:36:05 -0000 Received: from unknown (HELO murphys.services.quay.plus.net) (212.159.14.225) by mailstore with SMTP; 15 Nov 2003 16:36:05 -0000 Received: (qmail 8163 invoked from network); 15 Nov 2003 16:35:56 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by murphys.services.quay.plus.net with SMTP; 15 Nov 2003 16:35:50 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AL3N5-0003Bo-En for rsgb_lf_group-outgoing@blacksheep.org; Sat, 15 Nov 2003 16:34:03 +0000 Received: from [194.73.73.92] (helo=carbon.btinternet.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AL3N4-0003Bf-Q3 for rsgb_lf_group@blacksheep.org; Sat, 15 Nov 2003 16:34:02 +0000 Received: from dial81-131-150-228.in-addr.btopenworld.com ([81.131.150.228] helo=j1r9b7) by carbon.btinternet.com with smtp (Exim 3.22 #25) id 1AL3N3-00062E-00 for rsgb_lf_group@blacksheep.org; Sat, 15 Nov 2003 16:34:01 +0000 X-Bad-Message-ID: no DNS (j1r9b7) Message-ID: <000d01c3ab95$f1ae13a0$e4968351@j1r9b7> From: "Derek Atter" To: rsgb_lf_group@blacksheep.org References: <200311111621.hABGL1Q21253@mailgate5.cinetic.de> <002c01c3a896$64c504a0$141899c2@k7t> Date: Sat, 15 Nov 2003 16:30:51 -0000 MIME-Version: 1.0 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 Subject: Re: LF: Ex-Decca Trasmitter Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_30_40,HTML_MESSAGE autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Content-transfer-encoding: 8bit
Hi LFers
 
With the recent demise of the 73khz band, the Crawley Amateur Radio Club are disposing of their 1Kw ex-Decca transmitter previously modified for 73Khz operation making it available now for 136Khz use after re-tuning.
 
 The TX has a good pedigree having being previously loaned out to encourage operation on the 73Khz band and was used by Peter G3LDO and Laurie G3AQC during the early transatlantic tests and later by me in the two-way long distance QSO from Porthcurno in Cornwall up to David GM0MRF at the QTH of Simon GM4PLM in Cumnock, Scotland.   For those who are not familiar with the TX, it is electically very robust and has 3 PA modules operating in parallel each module having 4 power MOFETS in a bridge configuration operating nominally at +65V DC external supply input and is fully metered. It is a 19-inch rack mounted type unit 10.5" high and 19" deep. It will run a conservativly rated 1Kw RF output.
 The Club are now inviting offers for the TX towards club funds. They would refer that any buyer collects but if need be, they could arrange shipment at cost. Circuit info etc. is available.
 
Contact me at : datter@btinternet.com if interested in making an offer. The offer will be open until 30th November 03
 
                                                                            Vy 73, Derek Atter, G3GRO, Crawley
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2392 invoked from network); 24 Nov 2003 20:25:06 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 24 Nov 2003 20:25:06 -0000 Received: (qmail 15385 invoked by uid 10001); 24 Nov 2003 20:25:06 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 24 Nov 2003 20:24:54 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AONFX-0000pn-8L for rsgb_lf_group-outgoing@blacksheep.org; Mon, 24 Nov 2003 20:23:59 +0000 X-No-DNS-For: 166.82.181.250 Received: from [166.82.181.250] (helo=dustmac.dustinmcintyre.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AONFU-0000pX-JK for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 20:23:56 +0000 X-Fake-Domain: att.net Received: from att.net (main.dustinmcintyre.com [10.0.252.100] (may be forged)) by dustmac.dustinmcintyre.com (8.11.6/8.11.6) with ESMTP id hAOKNQ204189 for ; Mon, 24 Nov 2003 15:23:27 -0500 Message-ID: <3FC268BD.A4B333CD@att.net> Date: Mon, 24 Nov 2003 20:23:25 +0000 From: "Dexter McIntyre - W4DEX" X-Mailer: Mozilla 4.8 [en] (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <12d.357b7d9a.2cf3b16f@aol.com> Subject: Re: LF: Start rsgb_lf_group? Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 WarmSpgs@aol.com wrote: > > When in USA have permitted beacons 1w and a 15 meter antenna under FCC > > part 15 (160-190kHz)? > > This happened about 50 years ago, although I do not remember the precise year. > > John I still have the oscillator section of my first LF xmitter. It's an International Crystal OX-1 board with a 189 kc xtal. I built the xmitter about 1965 after reading a an article in an electronics magazine about the Part 15 rules. A schematic was included using what I believe was a 6AQ5 for the power amp. So I'm fairly sure the Part 15 rules for the 160-190 kc band was made prior to 1965. Dexter From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12958 invoked from network); 25 Nov 2003 10:35:21 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by mailstore with SMTP; 25 Nov 2003 10:35:21 -0000 Received: (qmail 24614 invoked from network); 25 Nov 2003 10:35:28 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by warrior.services.quay.plus.net with SMTP; 25 Nov 2003 10:35:22 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOaWh-00054G-Hs for rsgb_lf_group-outgoing@blacksheep.org; Tue, 25 Nov 2003 10:34:35 +0000 Received: from [213.218.75.234] (helo=smtp05.freeler.nl) by post.thorcom.com with esmtp (Exim 4.14) id 1AOaWg-000547-H4 for rsgb_lf_group@blacksheep.org; Tue, 25 Nov 2003 10:34:34 +0000 Received: (qmail 8098 invoked from network); 25 Nov 2003 10:34:33 -0000 X-Fake-Domain: unknown Received: from unknown (HELO w8k3f0.freeler.nl) ([62.21.146.165]) (envelope-sender ) by smtp05.freeler.nl (qmail-ldap-1.03) with SMTP for ; 25 Nov 2003 10:34:31 -0000 Message-ID: <5.1.0.14.0.20031125111716.02ed16c0@POP3.freeler.nl> X-Sender: FRE0000086604@POP3.freeler.nl X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Tue, 25 Nov 2003 11:29:32 +0100 To: rsgb_lf_group@blacksheep.org From: "Dick Rollema" In-reply-to: <014401c3b29e$1babb2c0$15309bd2@vaiosn> References: MIME-Version: 1.0 Subject: Re: LF: PA0SE Field Strength Meter for 137 kHz Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=HTML_MESSAGE autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Content-transfer-encoding: 8bit To All from PA0SE,

Many thanks to Stewart and several others who explained what went wrong with my e-mail for some subscribers to the reflector.

I emphasize that the formula can only be used within  distances from the transmitter where  the field strength decreases  in a linear way with distance and attenuation due to absorption by the ground can be neglected.   

73, Dick, PA0SE



At 07:17 24-11-03 -0800, you wrote:
Hi Eric and all,

Dick's post, made with Eudora, contained this HTML fragment:

The correct formula is:<br><br>
P = 0.0111(E *d)</font><font size=1><sup>2</sup></font><font size=3> in which
...

Depending on your mail reader and/or browser, the superscript 2 may not
have displayed correctly.

The correct formula is: P = 0.0111 * (E * d) ** 2
or P equals 0.0111 times ((E times d) squared)

Hope this is clear.

73,

Stewart

----- Original Message -----
From: "Eric KD5UWL" <eric@willow.nutstreet.net>
To: "LF-Group" <rsgb_lf_group@blacksheep.org>
Sent: Monday, November 24, 2003 6:44 AM
Subject: Re: LF: PA0SE Field Srength Meter for 137 kHz


> On Mon, 24 Nov 2003, Dick Rollema wrote:
>
> > produces a certain field strength is wrongly given as
> > P = 0.0111(E * d)2.
> >
> > The correct formula is:
> >
> > P = 0.0111(E *d)2 in which:
>
> Hi, Dick,
>
> Sorry -- I don't see the difference.  Did you include the wrong one?
>
> 73
> Eric
>
>
>
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12465 invoked from network); 24 Nov 2003 13:35:52 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by mailstore with SMTP; 24 Nov 2003 13:35:52 -0000 Received: (qmail 434 invoked from network); 24 Nov 2003 13:35:59 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by warrior.services.quay.plus.net with SMTP; 24 Nov 2003 13:35:55 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOGrh-0002YG-V8 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 24 Nov 2003 13:34:57 +0000 Received: from [213.218.75.231] (helo=smtp02.freeler.nl) by post.thorcom.com with esmtp (Exim 4.14) id 1AOGrd-0002Y7-IG for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 13:34:53 +0000 Received: (qmail 32531 invoked from network); 24 Nov 2003 13:34:53 -0000 X-Fake-Domain: unknown Received: from unknown (HELO w8k3f0.freeler.nl) ([62.21.168.117]) (envelope-sender ) by smtp02.freeler.nl (qmail-ldap-1.03) with SMTP for ; 24 Nov 2003 13:34:52 -0000 Message-ID: <5.1.0.14.0.20031124142908.024529c0@POP3.freeler.nl> X-Sender: FRE0000086604@POP3.freeler.nl X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Mon, 24 Nov 2003 14:30:16 +0100 To: "LF-Group" From: "Dick Rollema" MIME-Version: 1.0 Subject: LF: PA0SE Field Srength Meter for 137 kHz Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=HTML_MESSAGE autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Content-transfer-encoding: 8bit To All from PA0SE

A description of my Field Strength Meter for 136 kHz can be found on several web sites.

I just found out that on some web sites the formula for the power that produces a certain field strength is wrongly given as
P = 0.0111(E * d)2.

The correct formula is:

P = 0.0111(E *d)2 in which:

P in watt
E in mV/m
D in kilometre
* means multiplication

Dick Rollema, PA0SE
 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26920 invoked from network); 12 Nov 2003 09:15:53 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 12 Nov 2003 09:15:53 -0000 Received: (qmail 18247 invoked by uid 10001); 12 Nov 2003 09:15:53 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 12 Nov 2003 09:15:41 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AJr2J-0005m1-6s for rsgb_lf_group-outgoing@blacksheep.org; Wed, 12 Nov 2003 09:11:39 +0000 Received: from [213.218.75.233] (helo=smtp04.freeler.nl) by post.thorcom.com with esmtp (Exim 4.14) id 1AJr2I-0005ls-DL for rsgb_lf_group@blacksheep.org; Wed, 12 Nov 2003 09:11:38 +0000 Received: (qmail 12812 invoked from network); 12 Nov 2003 09:11:38 -0000 X-Fake-Domain: unknown Received: from unknown (HELO w8k3f0.freeler.nl) ([62.21.143.199]) (envelope-sender ) by smtp04.freeler.nl (qmail-ldap-1.03) with SMTP for ; 12 Nov 2003 09:11:37 -0000 Message-ID: <5.1.0.14.0.20031112095614.02b68420@POP3.freeler.nl> X-Sender: FRE0000086604@POP3.freeler.nl X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Wed, 12 Nov 2003 10:07:31 +0100 To: "LF-Group" From: "Dick Rollema" MIME-Version: 1.0 Subject: LF: 160m band Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=HTML_MESSAGE autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Content-transfer-encoding: 8bit Many thanks to G3PAI, G3GVB, M0BMU, LA8AK and PA0KDM (via direct e-mail) for their info on the regulations for top band. I now have sufficient info for my article in Electron.

The current regulations in the Netherlands are:

1810 - 1850kHz; primary status
1850 - 1880kHz; secondary status
Transmitter output power 400W PEP

73, Dick, PA0SE (licensed May 1951) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27148 invoked from network); 11 Nov 2003 11:59:42 -0000 Received: from netmail01.services.quay.plus.net (212.159.14.219) by mailstore with SMTP; 11 Nov 2003 11:59:42 -0000 Received: (qmail 25444 invoked by uid 10001); 11 Nov 2003 11:59:42 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 X-Fake-Domain: unknown X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from unknown (HELO post.thorcom.com) (193.82.116.20) by netmail01.services.quay.plus.net with SMTP; 11 Nov 2003 11:59:15 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AJX96-0004aY-4o for rsgb_lf_group-outgoing@blacksheep.org; Tue, 11 Nov 2003 11:57:20 +0000 Received: from [213.218.75.232] (helo=smtp03.freeler.nl) by post.thorcom.com with esmtp (Exim 4.14) id 1AJX95-0004aP-7o for rsgb_lf_group@blacksheep.org; Tue, 11 Nov 2003 11:57:19 +0000 Received: (qmail 12876 invoked from network); 11 Nov 2003 11:57:18 -0000 X-Fake-Domain: unknown Received: from unknown (HELO w8k3f0.freeler.nl) ([62.21.146.187]) (envelope-sender ) by smtp03.freeler.nl (qmail-ldap-1.03) with SMTP for ; 11 Nov 2003 11:57:17 -0000 Message-ID: <5.1.0.14.0.20031111124203.029ea850@POP3.freeler.nl> X-Sender: FRE0000086604@POP3.freeler.nl X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Tue, 11 Nov 2003 12:56:50 +0100 To: "LF-Group" From: "Dick Rollema" MIME-Version: 1.0 Subject: LF: Topband Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=HTML_MESSAGE autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Content-transfer-encoding: 8bit To All from PA0SE,

Sorry  to use  the reflector for a non-lf topic but in this way I can reach many amateurs in the UK that can possibly help me with some info I require.

I am presently writing an article on the 160m band for our VERON magazine Electron.  This band is not as popular here as it was and still is in the UK. The reason is no doubt that only in 1962 we got a small segment, 1825 - 1835kHz, with a maximum allowed power of 10 W.

I found out that in the UK before World War II the band  available to amateurs was 1715 - 2000kHz.  In 1953 this was changed to 1800 - 2000 kHz.

My questions are:

1. Were there any power restrictions in the past and present?

2. Is the band still 1800 - 2000kHz?

Any additional info of interest is also appreciated.

There must be old timers around that  can help me and I thank them in advance.

73, Dick, PA0SE From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 745 invoked from network); 27 Nov 2003 14:31:50 -0000 Received: from unknown (HELO netmail01.services.quay.plus.net) (212.159.14.219) by mailstore with SMTP; 27 Nov 2003 14:31:50 -0000 Received: (qmail 8722 invoked by uid 10001); 27 Nov 2003 14:31:49 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail01.services.quay.plus.net with SMTP; 27 Nov 2003 14:31:17 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1APN9r-0001CF-MV for rsgb_lf_group-outgoing@blacksheep.org; Thu, 27 Nov 2003 14:30:15 +0000 Received: from [194.25.134.80] (helo=mailout01.sul.t-online.com) by post.thorcom.com with esmtp (Exim 4.14) id 1APN9r-0001C6-1n for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2003 14:30:15 +0000 X-Fake-Domain: fwd08.aul.t-online.de Received: from fwd08.aul.t-online.de by mailout01.sul.t-online.com with smtp id 1APN9o-0007lP-00; Thu, 27 Nov 2003 15:30:12 +0100 X-Fake-Domain: oben Received: from oben (SUL8DmZFYeDkksD9MNvpIcabJ0KXZ-nDf06eTmnsZ2eWAlyuM+KFYO@[217.81.164.44]) by fwd08.sul.t-online.com with smtp id 1APN8A-1c4QUq0; Thu, 27 Nov 2003 15:28:30 +0100 X-Bad-Message-ID: no DNS (oben) Message-ID: <000d01c3b4f3$c4e68480$ee9bfea9@oben> From: "dj9dw" To: "LF_group" Date: Thu, 27 Nov 2003 15:35:56 +0100 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2720.3000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Seen: false X-ID: SUL8DmZFYeDkksD9MNvpIcabJ0KXZ-nDf06eTmnsZ2eWAlyuM+KFYO Subject: LF: Impedancebridge X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Gentlemen, you got the idea to get rid of disturbing carriers: the Siemens Pegelmesser is BW 20 Hz and that will help. If I got you right, these bridges do have an output for nulling with external detector. So let´s see where to get a bridge that fits. tnx es vy de Peter, dj9dw. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25053 invoked from network); 27 Nov 2003 11:17:17 -0000 Received: from unknown (HELO marstons.services.quay.plus.net) (212.159.14.223) by mailstore with SMTP; 27 Nov 2003 11:17:17 -0000 Received: (qmail 27028 invoked by uid 10001); 27 Nov 2003 11:17:16 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by marstons.services.quay.plus.net with SMTP; 27 Nov 2003 11:16:16 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1APK5Q-0006a1-Vi for rsgb_lf_group-outgoing@blacksheep.org; Thu, 27 Nov 2003 11:13:28 +0000 Received: from [194.25.134.17] (helo=mailout02.sul.t-online.com) by post.thorcom.com with esmtp (Exim 4.14) id 1APK5P-0006Zs-Pg for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2003 11:13:28 +0000 X-Fake-Domain: fwd07.aul.t-online.de Received: from fwd07.aul.t-online.de by mailout02.sul.t-online.com with smtp id 1APJfQ-00024d-01; Thu, 27 Nov 2003 11:46:36 +0100 X-Fake-Domain: oben Received: from oben (rfJblwZfge0CSnHTMtAel+28N-L0r85mf-LClaq8+3qq4Qk6t+VK0j@[80.128.189.39]) by fwd07.sul.t-online.com with smtp id 1APJer-1Ura1Q0; Thu, 27 Nov 2003 11:46:01 +0100 X-Bad-Message-ID: no DNS (oben) Message-ID: <002001c3b4d4$b05039e0$ee9bfea9@oben> From: "dj9dw" To: "LF_group" Date: Thu, 27 Nov 2003 11:53:27 +0100 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2720.3000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Seen: false X-ID: rfJblwZfge0CSnHTMtAel+28N-L0r85mf-LClaq8+3qq4Qk6t+VK0j Subject: LF: Impedancebridge X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Hello LFers, is the Gereral Radio 1656 covering our LF-Band? Can it take 20dBm or a bit more? My friends in Mainflingen deliver -5 dBm out of the umbrella here. So I have to run rather high levels for measurement. Are there alternative meters? The modern antennaanalyzers as MJF or AEA quit in my qra. tks 4 reply es 73 de Peter, dj9dw. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23222 invoked from network); 7 Nov 2003 22:56:53 -0000 Received: from unknown (HELO netmail01.services.quay.plus.net) (212.159.14.219) by mailstore with SMTP; 7 Nov 2003 22:56:53 -0000 Received: (qmail 27160 invoked by uid 10001); 7 Nov 2003 22:56:52 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail01.services.quay.plus.net with SMTP; 7 Nov 2003 22:56:43 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AIFSO-0006ZG-IE for rsgb_lf_group-outgoing@blacksheep.org; Fri, 07 Nov 2003 22:51:56 +0000 Received: from [194.25.134.18] (helo=mailout04.sul.t-online.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AIFSO-0006Z7-3d for rsgb_lf_group@blacksheep.org; Fri, 07 Nov 2003 22:51:56 +0000 X-Fake-Domain: fwd07.aul.t-online.de Received: from fwd07.aul.t-online.de by mailout04.sul.t-online.com with smtp id 1AIFSN-000589-02; Fri, 07 Nov 2003 23:51:55 +0100 X-Fake-Domain: oben Received: from oben (ZkggBgZTreGi7UmPTQZF3WFVmEZqAikEgqR7BM4TQrz3UPs-DoLEQH@[217.88.168.68]) by fwd07.sul.t-online.com with smtp id 1AIFSD-029Mie0; Fri, 7 Nov 2003 23:51:45 +0100 X-Bad-Message-ID: no DNS (oben) Message-ID: <001501c3a582$a0578e50$ee9bfea9@oben> From: "dj9dw" To: rsgb_lf_group@blacksheep.org Date: Fri, 7 Nov 2003 23:58:14 +0100 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2720.3000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Seen: false X-ID: ZkggBgZTreGi7UmPTQZF3WFVmEZqAikEgqR7BM4TQrz3UPs-DoLEQH Subject: LF: RU6LA/B X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Hi Ed, no copy of ur beacon, cause SXV is -60dBm on 135.92. BW=200Hz. good luck on RTTY es 73 dj9dw From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1982 invoked from network); 11 Nov 2003 22:08:59 -0000 Received: from unknown (HELO netmail01.services.quay.plus.net) (212.159.14.219) by mailstore with SMTP; 11 Nov 2003 22:08:59 -0000 Received: (qmail 20857 invoked by uid 10001); 11 Nov 2003 22:08:59 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail01.services.quay.plus.net with SMTP; 11 Nov 2003 22:08:46 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AJgg7-00055n-0g for rsgb_lf_group-outgoing@blacksheep.org; Tue, 11 Nov 2003 22:08:03 +0000 Received: from [64.12.136.8] (helo=imo-m05.mx.aol.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AJgg6-0004xt-8l for rsgb_lf_group@blacksheep.org; Tue, 11 Nov 2003 22:08:02 +0000 X-Fake-Domain: DL4YHF@aol.com Received: from DL4YHF@aol.com by imo-m05.mx.aol.com (mail_out_v36_r1.1.) id l.3a.40d2d5da (3932) for ; Tue, 11 Nov 2003 17:07:21 -0500 (EST) From: DL4YHF@aol.com Message-ID: <3a.40d2d5da.2ce2b799@aol.com> Date: Tue, 11 Nov 2003 17:07:21 EST To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 8.0 for Windows sub 6104 Subject: Re: LF: Dummy-Load on LW Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=HTML_MESSAGE,NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Content-transfer-encoding: 8bit Hello Walter and group,

> DK8ND's email raises an interesting point. Can any of our German friends tell me why an impedance of 60 ohms was popular in Germany for some time but not anywhere else?
<
I think 60 Ohms was once popular because it was one quarter of the once widely used symmectric 240 Ohm systems. Easy to build baluns from 240 to 60 Ohms. I remember our old tube-equipped TV had such a balun.
Next question.. why 240 Ohms for symmetric lines ? ..  possibly because of the folded dipole.

This may be only one -probably the wrong- explanation. Another may be the loss on a 60 Ohm cable at higher frequencies is a bit lower than in a 50 Ohm cable.


Regards,
Wolf DL4YHF.

 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 87405 invoked from network); 29 Nov 2003 15:11:34 -0000 Received: from unknown (HELO marstons.services.quay.plus.net) (212.159.14.223) by ptb-mailstore with SMTP; 29 Nov 2003 15:11:34 -0000 Received: (qmail 20803 invoked by uid 10001); 29 Nov 2003 15:11:33 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MSMail-Priority: Normal Received: from post.thorcom.com (193.82.116.20) by marstons.services.quay.plus.net with SMTP; 29 Nov 2003 15:11:18 -0000 X-Fake-Domain: majordom X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AQ6jq-0003eu-Ce for rsgb_lf_group-outgoing@blacksheep.org; Sat, 29 Nov 2003 15:10:26 +0000 X-No-DNS-For: 80.68.4.13 Received: from [80.68.4.13] (helo=relay.dx.ru) by post.thorcom.com with smtp (Exim 4.14) id 1AQ6jp-0003ef-EA for rsgb_lf_group@blacksheep.org; Sat, 29 Nov 2003 15:10:25 +0000 Received: (qmail 17795 invoked from network); 29 Nov 2003 18:09:53 +0300 X-Fake-Domain: ed.dx Received: from ed.dx (10.0.1.11) by unix.dx with SMTP; 29 Nov 2003 18:09:53 +0300 Date: Sat, 29 Nov 2003 18:09:46 +0000 From: "Ed Lesnichy" X-Suspect-Bulk-Mailer: The Bat! X-Mailer: The Bat! (v1.60q) Personal Organization: Ed Lesnichy X-Priority: 3 Message-ID: <231980558.20031129180946@dx.ru> To: rsgb_lf_group@blacksheep.org In-reply-to: <001901c3b685$8d70ee80$6507a8c0@Main> References: <001901c3b685$8d70ee80$6507a8c0@Main> MIME-Version: 1.0 Subject: LF: Re: T/A DX Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Hi LFers! Saturday, November 29, 2003 G3NYK wrote: ...skip... AM> Hopefully now the sudden solar "flare-up" seems to have died away, and AM> geomagnetic activity has quietened, we might see conditions improve to the AM> point of success with some at least of there routes. Joe has already worked AM> Jim two-way.....and is visible almost regardless of the conditions, with a AM> "window" of almost 12 hours now. Really good conditions could produce the AM> first manual morse T/A qso !! AM> Good Hunting !! ....its not illegal yet!! There are no signals from Joe VO1NA and while bad propagation through auroral oval from UA6 to NA, on 160m also. I think that while large SFI(abt 170 now), but A index and K index very quite good. I shall expect good propagation to NA and then I shall go to Machta. I believe that in some days there will be a good propagation in UA6 Is IK2DED's beacon again on 135.7 ? 73! Ed RU6LA ed@dx.ru http://136.73.ru From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19153 invoked from network); 24 Nov 2003 15:45:09 -0000 Received: from unknown (HELO netmail01.services.quay.plus.net) (212.159.14.219) by mailstore with SMTP; 24 Nov 2003 15:45:09 -0000 Received: (qmail 23652 invoked by uid 10001); 24 Nov 2003 15:45:08 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MSMail-Priority: Normal Received: from post.thorcom.com (193.82.116.20) by netmail01.services.quay.plus.net with SMTP; 24 Nov 2003 15:44:36 -0000 X-Fake-Domain: majordom X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOIsJ-0004sF-Np for rsgb_lf_group-outgoing@blacksheep.org; Mon, 24 Nov 2003 15:43:43 +0000 X-No-DNS-For: 80.68.4.13 Received: from [80.68.4.13] (helo=relay.dx.ru) by post.thorcom.com with smtp (Exim 4.14) id 1AOIsI-0004s2-Ku for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 15:43:43 +0000 Received: (qmail 42652 invoked from network); 24 Nov 2003 18:43:10 +0300 X-Fake-Domain: ed.dx Received: from ed.dx (10.0.1.11) by unix.dx with SMTP; 24 Nov 2003 18:43:10 +0300 Date: Mon, 24 Nov 2003 18:43:01 +0000 From: "Ed Lesnichy" X-Suspect-Bulk-Mailer: The Bat! X-Mailer: The Bat! (v1.60q) Personal Organization: Ed Lesnichy X-Priority: 3 Message-ID: <886692392.20031124184301@dx.ru> To: rsgb_lf_group@blacksheep.org In-reply-to: <5.1.0.14.0.20031124142908.024529c0@POP3.freeler.nl> References: <5.1.0.14.0.20031124142908.024529c0@POP3.freeler.nl> MIME-Version: 1.0 Subject: LF: Start rsgb_lf_group? Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 2 all LFers! When was open rsgb_lf_group list? 1997 or 98? What was date? Who was moderator of lf_group then, also who is moderator now? Whether there is at lf_group an archive of the messages? When in USA have permitted beacons 1w and a 15 meter antenna under FCC part 15 (160-190kHz)? When VK Australia and ZL New Zeland have received LF (165-190kHz) band? TNX for any info! 73! Ed RU6LA ed@dx.ru http://136.73.ru From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4118 invoked from network); 7 Nov 2003 11:13:56 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 7 Nov 2003 11:13:56 -0000 Received: (qmail 15357 invoked from network); 7 Nov 2003 11:13:55 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 7 Nov 2003 11:13:48 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AI4TV-0005BS-U4 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 07 Nov 2003 11:08:21 +0000 X-No-DNS-For: 80.68.4.13 Received: from [80.68.4.13] (helo=relay.dx.ru) by post.thorcom.com with smtp (Exim 4.14) id 1AI4TU-0005BJ-UV for rsgb_lf_group@blacksheep.org; Fri, 07 Nov 2003 11:08:21 +0000 Received: (qmail 87201 invoked from network); 7 Nov 2003 14:07:45 +0300 X-Fake-Domain: ed.dx Received: from ed.dx (10.0.1.11) by unix.dx with SMTP; 7 Nov 2003 14:07:45 +0300 Date: Fri, 7 Nov 2003 14:07:47 +0300 From: "Ed Lesnichy" X-Suspect-Bulk-Mailer: The Bat! X-Mailer: The Bat! (v1.60q) Personal Organization: Ed Lesnichy X-Priority: 3 Message-ID: <179184868651.20031107140747@dx.ru> To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Subject: LF: Nov 7-10 beacon Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Hello LF_group! 1. RU6LA will be sending beacon transmissions on 7, 8, 9 and 10 Nov. Freq abt 135.922, QRSS 60 "RU6LA" I plan to start today at night(abt 22-23z Nov 7) and to finish on Monday in the morning (abt 0430z Nov 10) On KN97LN Sunset abt 1400z, Sunrise abt 0430z In this weekend I shall work in WAEDC RTTY contest 2. I have updated pages on the site: - LF's History http://136.73.ru/h_history/index.htm - Best LF QSOs http://136.73.ru/h_qso/index.htm The large TNX by all to me assisting! Please check up and add/correct/delete data (date/call/QTH-loc/Eq...) if you have exacter facts. TNX for efforts! I have found still information about TA QSO - David G4FTC : http://www.qsl.net/g4ftc/136khz/home.htm 3. I have updated info in LF_HAM.ZIP also : http://136.73.ru/files/lf_ham.zip 73! Ed RU6LA ed@dx.ru http://136.73.ru From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3887 invoked from network); 27 Nov 2003 18:01:18 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 27 Nov 2003 18:01:18 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 5365 invoked from network); 27 Nov 2003 18:01:18 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 27 Nov 2003 18:01:10 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1APQNs-0004Zq-D2 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 27 Nov 2003 17:56:56 +0000 Received: from [65.69.121.158] (helo=willow.nutstreet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1APQNr-0004Zh-2G for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2003 17:56:55 +0000 Received: from willow.nutstreet.net (localhost [127.0.0.1]) by willow.nutstreet.net (8.12.8/8.12.8) with ESMTP id hARHupAl031579 for ; Thu, 27 Nov 2003 11:56:51 -0600 Received: from localhost (eric@localhost) by willow.nutstreet.net (8.12.8/8.12.8/Submit) with ESMTP id hARHup0J031575 for ; Thu, 27 Nov 2003 11:56:51 -0600 Date: Thu, 27 Nov 2003 11:56:51 -0600 (CST) From: "Eric KD5UWL" To: rsgb_lf_group@blacksheep.org In-reply-to: <3FC5C32E.19892.A1EEB2@localhost> Message-ID: MIME-Version: 1.0 Subject: LF: XFX QRT Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Antenna damage to corona. Pictures soon. Hope to have new antenna QRV before long ... 73 Eric From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16669 invoked from network); 24 Nov 2003 16:05:38 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 24 Nov 2003 16:05:38 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 16550 invoked from network); 24 Nov 2003 16:05:37 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 24 Nov 2003 16:05:28 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOJCV-0005EO-RI for rsgb_lf_group-outgoing@blacksheep.org; Mon, 24 Nov 2003 16:04:35 +0000 Received: from [65.69.121.158] (helo=willow.nutstreet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AOJCU-0005EF-NA for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 16:04:35 +0000 Received: from willow.nutstreet.net (localhost [127.0.0.1]) by willow.nutstreet.net (8.12.8/8.12.8) with ESMTP id hAOG4VAl025662 for ; Mon, 24 Nov 2003 10:04:31 -0600 Received: from localhost (eric@localhost) by willow.nutstreet.net (8.12.8/8.12.8/Submit) with ESMTP id hAOG4VeO025658 for ; Mon, 24 Nov 2003 10:04:31 -0600 Date: Mon, 24 Nov 2003 10:04:30 -0600 (CST) From: "Eric KD5UWL" To: rsgb_lf_group@blacksheep.org In-reply-to: <886692392.20031124184301@dx.ru> Message-ID: MIME-Version: 1.0 Subject: Re: LF: Start rsgb_lf_group? Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.4 required=5.0 tests=UP_TO_OR_MORES autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Hi, Ed, > When in USA have permitted beacons 1w and a 15 meter antenna under FCC > part 15 (160-190kHz)? This is the only one I can answer, and I don't even know the exact date -- many, many years. But keep in mind that this is 1W INPUT, *not* ERP. The part 15 rules are quite tough. However, many LF beacon operators ("LowFERs") operating in this range have had successes of close to 2000 miles using weaksignal reception techniques (Argo, etc). This is NOT the case for part 5 beacon operators who are allowed much more power....some are allowed up to 1W ERP or more, for example. Hope this helps, Eric From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5388 invoked from network); 24 Nov 2003 16:00:47 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 24 Nov 2003 16:00:47 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 11967 invoked from network); 24 Nov 2003 16:00:46 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 24 Nov 2003 16:00:40 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOJ7o-0005AI-V0 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 24 Nov 2003 15:59:44 +0000 Received: from [65.69.121.158] (helo=willow.nutstreet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AOJ7o-0005A9-3o for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 15:59:44 +0000 Received: from willow.nutstreet.net (localhost [127.0.0.1]) by willow.nutstreet.net (8.12.8/8.12.8) with ESMTP id hAOFxeAl025648 for ; Mon, 24 Nov 2003 09:59:40 -0600 Received: from localhost (eric@localhost) by willow.nutstreet.net (8.12.8/8.12.8/Submit) with ESMTP id hAOFxe9g025644 for ; Mon, 24 Nov 2003 09:59:40 -0600 Date: Mon, 24 Nov 2003 09:59:40 -0600 (CST) From: "Eric KD5UWL" To: rsgb_lf_group@blacksheep.org In-reply-to: <014401c3b29e$1babb2c0$15309bd2@vaiosn> Message-ID: MIME-Version: 1.0 Subject: Re: LF: PA0SE Field Srength Meter for 137 kHz Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=HTML_MESSAGE autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Ahhh .. excellent. Sorry -- I don't use html email clients for these reflectors and missed the distinction. I did, however, read the )2 as ) ** 2 or )^2 which is what was intended. I just didn't see the difference in the two as written without the benefit of HTML. Thanks for the clarification and sorry for the confusion, Eric On Mon, 24 Nov 2003, Stewart Nelson wrote: > Hi Eric and all, > > Dick's post, made with Eudora, contained this HTML fragment: > > The correct formula is:

> P = 0.0111(E *d)2 in which > ... > > Depending on your mail reader and/or browser, the superscript 2 may not > have displayed correctly. > > The correct formula is: P = 0.0111 * (E * d) ** 2 > or P equals 0.0111 times ((E times d) squared) > > Hope this is clear. > > 73, > > Stewart > > ----- Original Message ----- > From: "Eric KD5UWL" > To: "LF-Group" > Sent: Monday, November 24, 2003 6:44 AM > Subject: Re: LF: PA0SE Field Srength Meter for 137 kHz > > > > On Mon, 24 Nov 2003, Dick Rollema wrote: > > > > > produces a certain field strength is wrongly given as > > > P = 0.0111(E * d)2. > > > > > > The correct formula is: > > > > > > P = 0.0111(E *d)2 in which: > > > > Hi, Dick, > > > > Sorry -- I don't see the difference. Did you include the wrong one? > > > > 73 > > Eric > > > > > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14599 invoked from network); 24 Nov 2003 14:47:17 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 24 Nov 2003 14:47:17 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 15460 invoked by uid 10001); 24 Nov 2003 14:47:16 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 24 Nov 2003 14:46:10 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOHwo-0003qW-VP for rsgb_lf_group-outgoing@blacksheep.org; Mon, 24 Nov 2003 14:44:18 +0000 Received: from [65.69.121.158] (helo=willow.nutstreet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AOHwn-0003qN-Ga for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 14:44:17 +0000 Received: from willow.nutstreet.net (localhost [127.0.0.1]) by willow.nutstreet.net (8.12.8/8.12.8) with ESMTP id hAOEiDAl025529 for ; Mon, 24 Nov 2003 08:44:13 -0600 Received: from localhost (eric@localhost) by willow.nutstreet.net (8.12.8/8.12.8/Submit) with ESMTP id hAOEiCS6025525 for ; Mon, 24 Nov 2003 08:44:13 -0600 Date: Mon, 24 Nov 2003 08:44:12 -0600 (CST) From: "Eric KD5UWL" To: "LF-Group" In-reply-to: <5.1.0.14.0.20031124142908.024529c0@POP3.freeler.nl> Message-ID: MIME-Version: 1.0 Subject: Re: LF: PA0SE Field Srength Meter for 137 kHz Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 On Mon, 24 Nov 2003, Dick Rollema wrote: > produces a certain field strength is wrongly given as > P = 0.0111(E * d)2. > > The correct formula is: > > P = 0.0111(E *d)2 in which: Hi, Dick, Sorry -- I don't see the difference. Did you include the wrong one? 73 Eric From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 31093 invoked from network); 21 Nov 2003 21:24:02 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 21 Nov 2003 21:24:02 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 16969 invoked from network); 21 Nov 2003 21:24:01 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 21 Nov 2003 21:23:56 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ANIkH-0006J2-Eb for rsgb_lf_group-outgoing@blacksheep.org; Fri, 21 Nov 2003 21:23:17 +0000 Received: from [65.69.120.46] (helo=willow.nutstreet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ANIkG-0006It-DK for rsgb_lf_group@blacksheep.org; Fri, 21 Nov 2003 21:23:16 +0000 Received: from willow.nutstreet.net (localhost [127.0.0.1]) by willow.nutstreet.net (8.12.8/8.12.8) with ESMTP id hALLNCAl010527 for ; Fri, 21 Nov 2003 15:23:12 -0600 Received: from localhost (eric@localhost) by willow.nutstreet.net (8.12.8/8.12.8/Submit) with ESMTP id hALLNCGL010523 for ; Fri, 21 Nov 2003 15:23:12 -0600 Date: Fri, 21 Nov 2003 15:23:12 -0600 (CST) From: "Eric KD5UWL" To: rsgb_lf_group@blacksheep.org In-reply-to: <158.281cc530.2cefd805@aol.com> Message-ID: MIME-Version: 1.0 Subject: Re: LF: Beacons stays on Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 > > it is > > confirmed that it and me/Sheri are being moved close to the SE Kansas/NE > > Oklahoma Border in January sometime. > ...No mountains in the distance, no midnight sun, but once tornado Excuse me, but it's not so bad here. There ARE mountains in the distance. They are just so far in the distance you can't see them :) 73 Eric EM25 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 32001 invoked from network); 14 Nov 2003 16:49:49 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by mailstore with SMTP; 14 Nov 2003 16:49:49 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 24635 invoked from network); 14 Nov 2003 16:49:55 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by warrior.services.quay.plus.net with SMTP; 14 Nov 2003 16:49:41 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AKh7f-0001P9-N3 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 14 Nov 2003 16:48:39 +0000 Received: from [65.69.120.46] (helo=willow.nutstreet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AKh7e-0001P0-FK for rsgb_lf_group@blacksheep.org; Fri, 14 Nov 2003 16:48:38 +0000 Received: from willow.nutstreet.net (localhost [127.0.0.1]) by willow.nutstreet.net (8.12.8/8.12.8) with ESMTP id hAEGmYAl018608 for ; Fri, 14 Nov 2003 10:48:34 -0600 Received: from localhost (eric@localhost) by willow.nutstreet.net (8.12.8/8.12.8/Submit) with ESMTP id hAEGmYxJ018604 for ; Fri, 14 Nov 2003 10:48:34 -0600 Date: Fri, 14 Nov 2003 10:48:34 -0600 (CST) From: "Eric KD5UWL" To: "LF-Group" In-reply-to: <001f01c3aaa7$30c541c0$6507a8c0@Main> Message-ID: MIME-Version: 1.0 Subject: LF: XFX Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Hi all, I'm new to the reflector -- Laurence KL1X told me about it. I've a new 2200m beacon on the air: http://www.nutstreet.net/xfx/ 73 Eric From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22695 invoked from network); 19 Nov 2003 23:34:05 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 19 Nov 2003 23:34:05 -0000 Received: (qmail 2363 invoked by uid 10001); 19 Nov 2003 23:34:05 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 19 Nov 2003 23:33:57 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AMbkU-0004vJ-Iz for rsgb_lf_group-outgoing@blacksheep.org; Wed, 19 Nov 2003 23:28:38 +0000 Received: from [152.163.225.102] (helo=imo-r06.mx.aol.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AMbkT-0004rt-Mq for rsgb_lf_group@blacksheep.org; Wed, 19 Nov 2003 23:28:37 +0000 X-Fake-Domain: G0MRF@aol.com Received: from G0MRF@aol.com by imo-r06.mx.aol.com (mail_out_v36_r1.1.) id l.1d9.14b6f3fd (4592) for ; Wed, 19 Nov 2003 18:27:58 -0500 (EST) From: G0MRF@aol.com Message-ID: <1d9.14b6f3fd.2ced567e@aol.com> Date: Wed, 19 Nov 2003 18:27:58 EST To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 8.0 for Windows sub 670 Subject: LF: Re: Security checks Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=HTML_MESSAGE,NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Content-transfer-encoding: 8bit In a message dated 11/19/03 9:40:15 PM GMT Standard Time, g3ldo@ukonline.co.uk writes:

Can these machines tell the difference between a metal box of components,
such as a rig, ATU or PSU and a solid block of a CW key?
I was more concerned about weight (as the XYL seemed to want to pack her
entire wardrobe) so I used a lightweight CW paddle that was fixed to a
clipboard that contained all the amateur radio papers.
I put all my ham radio gear into a separate small case which I never saw
again until it reluctantly appeared at baggage reclaim. I carried my laptop
and antenna mast (fibre glass telescopic roach pole, used as a walking
stick) as hand luggage. I specifically asked that the laptop didn't go
through the xray machine so that was the only item that got looked at.

Peter G3LDO




Hello Peter.

I once travelled to Sri Lanka on the same flight as their Prime Minister. (Although he was at the front and I wasn't)
My luggage got a very thorough going over and I was called to security to explain the Image of an Ameritron valve linear. The security personel let me look at the monitor and asked for details. Any metal panels even 2 or 3mm thick were translucent and the electronics could be seen clearly inside the box. The problem seemed to be anything that appeared impervious to the low level X-rays employed in the machines. The solid base of my Bencher always gets the 'third degree' and on the Sri-Lanka flight the thick coils used in the tank coil were totally 'black'  and caused concern. On a flight to Washington I took a Decca transmitter over to Andre N4ICK. Although it was too large to put on the little weighing machine at the Heathrow check in, the security check was brief as the detail of the decca construction could be seen quite clearly and they were happy.

Next spring I'm off to operate 3B9C. Fortunately all the equipment is being shipped by sea months in advance. No tricky moments on that trip, either with security or trying stand upright trying to hold a 50lb piece of hand luggage as though it contains a pair of shorts and a bottle of suntan lotion!

73

David   G0MRF From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4663 invoked from network); 19 Nov 2003 13:50:45 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 19 Nov 2003 13:50:45 -0000 Received: (qmail 14395 invoked from network); 19 Nov 2003 13:50:44 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 19 Nov 2003 13:50:36 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AMSds-0006io-Rf for rsgb_lf_group-outgoing@blacksheep.org; Wed, 19 Nov 2003 13:45:12 +0000 Received: from [64.12.136.7] (helo=imo-m04.mx.aol.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AMSds-0006ib-1b for rsgb_lf_group@blacksheep.org; Wed, 19 Nov 2003 13:45:12 +0000 X-Fake-Domain: G0MRF@aol.com Received: from G0MRF@aol.com by imo-m04.mx.aol.com (mail_out_v36_r1.1.) id l.c3.3abaa590 (3858) for ; Wed, 19 Nov 2003 08:44:38 -0500 (EST) From: G0MRF@aol.com Message-ID: Date: Wed, 19 Nov 2003 08:44:37 EST To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 8.0 for Windows sub 670 Subject: Re: LF: CT1/G3KEV Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.1 required=5.0 tests=HTML_30_40,HTML_MESSAGE,NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Content-transfer-encoding: 8bit In a message dated 11/18/03 8:02:22 PM GMT Standard Time, g3kev.ham@virgin.net writes:

Airport security at LEEDS very thorough, when my equipment passed the xray machine all the lights and buzzers went off because of one dangerous looking item. I had to unpack one bag and the suspect item was my MORSE key. They had not encountered one of these devices before. One the way back at FARO airport the security xray light up just the same flashing lights etc but the man just waved me on, he obviously knows all about amateur radio and morse keys !!!!!!!!!!!!!
 
73 de Mal/G3KEV
 


Nice to work you on voice on 80m for the first time Mal.

FB on the security.  I find that the X-ray machines hate the solid metal base of some morse keys. Apparently the density of block of Semtex has a similar effect on the image displayed on the security monitors.

73

David From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18136 invoked from network); 7 Nov 2003 13:05:30 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 7 Nov 2003 13:05:30 -0000 Received: (qmail 7221 invoked from network); 7 Nov 2003 13:05:18 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 7 Nov 2003 13:05:09 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AI6GE-0006zK-13 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 07 Nov 2003 13:02:46 +0000 Received: from [152.163.225.99] (helo=imo-r03.mx.aol.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AI6GD-0006z6-1S for rsgb_lf_group@blacksheep.org; Fri, 07 Nov 2003 13:02:45 +0000 X-Fake-Domain: G0MRF@aol.com Received: from G0MRF@aol.com by imo-r03.mx.aol.com (mail_out_v36_r1.1.) id l.19d.1ca91b53 (25098) for ; Fri, 7 Nov 2003 08:02:06 -0500 (EST) From: G0MRF@aol.com Message-ID: <19d.1ca91b53.2cdcf1ce@aol.com> Date: Fri, 7 Nov 2003 08:02:06 EST To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 8.0 for Windows sub 670 Subject: LF: Dummy loads at LF Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=HTML_MESSAGE,NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Content-transfer-encoding: 8bit In a message dated 11/7/03 12:42:28 PM GMT Standard Time, J.R.Moritz@herts.ac.uk writes:


The Vishay RCH50 50W film resistors sold by RS components are pretty
good value at about 2-3 pounds each, and work OK up to HF - but
obviously you need a hefty heatsink as well as the resistors.

Cheers, Jim Moritz
73 de M0BMU




Hello Jim / Gary.

As you say the wirewound types can give a very acceptable return loss at 136kHz and are much cheaper than a 'non inductive type' of similar power.

I have also recently used two of the RCH50 type resistors ( but 100 Ohms) in a wilkinson combiner at  100MHz. - they worked just fine.

73

David   G0MRF From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 31886 invoked from network); 19 Nov 2003 21:40:23 -0000 Received: from unknown (HELO netmail01.services.quay.plus.net) (212.159.14.219) by mailstore with SMTP; 19 Nov 2003 21:40:23 -0000 Received: (qmail 10809 invoked by uid 10001); 19 Nov 2003 21:40:22 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail01.services.quay.plus.net with SMTP; 19 Nov 2003 21:40:09 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AMa2K-0003aB-36 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 19 Nov 2003 21:38:56 +0000 Received: from [212.135.6.11] (helo=smarthost1.mail.uk.easynet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AMa2J-0003a2-NB for rsgb_lf_group@blacksheep.org; Wed, 19 Nov 2003 21:38:55 +0000 Received: from tnt-2-43.easynet.co.uk ([195.40.196.43] helo=erica) by smarthost1.mail.uk.easynet.net with smtp (Exim 4.10) id 1AMa2G-000Ijl-00 for rsgb_lf_group@blacksheep.org; Wed, 19 Nov 2003 21:38:54 +0000 X-Bad-Message-ID: no DNS (erica) Message-ID: <000601c3aee7$723ec2e0$2bc428c3@erica> From: "g3ldo" To: rsgb_lf_group@blacksheep.org References: Date: Wed, 19 Nov 2003 21:52:01 -0000 MIME-Version: 1.0 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 Subject: Re: LF: CT1/G3KEV Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Dave, G0MRF said: >I find that the X-ray machines hate the solid metal base of some morse keys. >Apparently the density of block of Semtex has a similar effect on >the image displayed on the security monitors. Can these machines tell the difference between a metal box of components, such as a rig, ATU or PSU and a solid block of a CW key? I was more concerned about weight (as the XYL seemed to want to pack her entire wardrobe) so I used a lightweight CW paddle that was fixed to a clipboard that contained all the amateur radio papers. I put all my ham radio gear into a separate small case which I never saw again until it reluctantly appeared at baggage reclaim. I carried my laptop and antenna mast (fibre glass telescopic roach pole, used as a walking stick) as hand luggage. I specifically asked that the laptop didn't go through the xray machine so that was the only item that got looked at. Peter G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9532 invoked from network); 17 Nov 2003 10:33:37 -0000 Received: from unknown (HELO murphys.services.quay.plus.net) (212.159.14.225) by mailstore with SMTP; 17 Nov 2003 10:33:37 -0000 Received: (qmail 525 invoked from network); 17 Nov 2003 10:33:28 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by murphys.services.quay.plus.net with SMTP; 17 Nov 2003 10:33:13 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ALgZX-0007WB-LI for rsgb_lf_group-outgoing@blacksheep.org; Mon, 17 Nov 2003 10:25:31 +0000 Received: from [212.135.6.12] (helo=smarthost2.mail.uk.easynet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ALgZX-0007Vs-0X for rsgb_lf_group@blacksheep.org; Mon, 17 Nov 2003 10:25:31 +0000 Received: from tnt-5-136.easynet.co.uk ([195.40.200.136] helo=erica) by smarthost2.mail.uk.easynet.net with smtp (Exim 4.10) id 1ALgZP-000BNO-00 for rsgb_lf_group@blacksheep.org; Mon, 17 Nov 2003 10:25:25 +0000 X-Bad-Message-ID: no DNS (erica) Message-ID: <000701c3acf7$04109100$88c828c3@erica> From: "g3ldo" To: rsgb_lf_group@blacksheep.org References: <000701c3a940$8fd04ce0$5de486d4@erica> <000801c3a9d0$3b94b900$631686d4@erica> Date: Mon, 17 Nov 2003 10:37:56 -0000 MIME-Version: 1.0 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 Subject: LF: LF. UI signals Content-Type: multipart/mixed; boundary="------------090407030102050209010801" X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 This is a multi-part message in MIME format. --------------090407030102050209010801 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit Hello LF Group, Anyone know the origin of the signal in the attached picture? Argo set for QRSS30 slow speed. QSB on signal - it had dissapeared in the next frame and returned in the following. The regular QSY up and down of .5Hz is strange. 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m++KjpgOfqKb2pz9RTe1JgSp/wAe7VGvepE/492qNe9MBO9CffH1o70J98fWpW4Ek/3/AMKj qSf7/wCFR03uBJF3pj9afF3pj9afQAT71O7NTU+9TuzUkAxehpT98Ui9DSn74oWwEs3QU0dK dN0FNHSmwEb7pph6int900w9RSA0tG/5C1v/AMC/9BNdFqH/ACD7n/rk38q53Rv+Qtb/APAv /QTXRah/yD7n/rk38qznuNBc/wCvtP8Arqf/AEB6E/5CM3/XKP8Am9Fz/r7T/rqf/QHoT/kI zf8AXKP+b1AyzRRRQB//2Q== --------------090407030102050209010801-- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13302 invoked from network); 13 Nov 2003 10:17:16 -0000 Received: from unknown (HELO netmail01.services.quay.plus.net) (212.159.14.219) by mailstore with SMTP; 13 Nov 2003 10:17:16 -0000 Received: (qmail 22538 invoked by uid 10001); 13 Nov 2003 10:17:16 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail01.services.quay.plus.net with SMTP; 13 Nov 2003 10:17:03 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AKEQu-0004b5-9H for rsgb_lf_group-outgoing@blacksheep.org; Thu, 13 Nov 2003 10:10:36 +0000 Received: from [212.135.6.10] (helo=smarthost0.mail.uk.easynet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AKEQt-0004aw-To for rsgb_lf_group@blacksheep.org; Thu, 13 Nov 2003 10:10:35 +0000 Received: from tnt-13-99.easynet.co.uk ([212.134.22.99] helo=erica) by smarthost0.mail.uk.easynet.net with smtp (Exim 4.10) id 1AKEQl-00073M-00 for rsgb_lf_group@blacksheep.org; Thu, 13 Nov 2003 10:10:28 +0000 X-Bad-Message-ID: no DNS (erica) Message-ID: <000801c3a9d0$3b94b900$631686d4@erica> From: "g3ldo" To: rsgb_lf_group@blacksheep.org References: <000701c3a940$8fd04ce0$5de486d4@erica> Date: Thu, 13 Nov 2003 10:22:51 -0000 MIME-Version: 1.0 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 Subject: LF: Re: LF Sgnals Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 > I am giving a chat on 73kHz and LF at the Worthing ARC tonight. I hope to > try out a receiver with a short antenna and would appreciate any QRSS3 > beaconing from 2030UTC until 2130UTC around 137.400kHz or a CW CQ from a > more local station(s) at around 2100UTC on say 136.6kHz. The noise level at the club was horrendous; nevertheless received M0BMU. Those who had not seen Argo in action were surprised to see the signal pop up out of the noise. Thanks Jim, and any one else who was transmitting. Regards, Peter, G3LDO e-mail From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22411 invoked from network); 12 Nov 2003 17:05:56 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 12 Nov 2003 17:05:56 -0000 Received: (qmail 14123 invoked by uid 10001); 12 Nov 2003 17:05:53 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-Fake-Domain: unknown Received: from unknown (HELO post.thorcom.com) (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 12 Nov 2003 17:04:25 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AJyNk-0004Nq-US for rsgb_lf_group-outgoing@blacksheep.org; Wed, 12 Nov 2003 17:02:16 +0000 Received: from [212.135.6.10] (helo=smarthost0.mail.uk.easynet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AJyNk-0004Nd-Cm for rsgb_lf_group@blacksheep.org; Wed, 12 Nov 2003 17:02:16 +0000 Received: from tnt-21-93.easynet.co.uk ([212.134.228.93] helo=erica) by smarthost0.mail.uk.easynet.net with smtp (Exim 4.10) id 1AJyNV-0001Z2-00 for rsgb_lf_group@blacksheep.org; Wed, 12 Nov 2003 17:02:01 +0000 X-Bad-Message-ID: no DNS (erica) Message-ID: <000701c3a940$8fd04ce0$5de486d4@erica> From: "g3ldo" To: rsgb_lf_group@blacksheep.org Date: Wed, 12 Nov 2003 17:14:46 -0000 MIME-Version: 1.0 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 Subject: LF: LF Sgnals Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 3 Hello Group, I am giving a chat on 73kHz and LF at the Worthing ARC tonight. I hope to try out a receiver with a short antenna and would appreciate any QRSS3 beaconing from 2030UTC until 2130UTC around 137.400kHz or a CW CQ from a more local station(s) at around 2100UTC on say 136.6kHz. Many thanks Peter G3LDO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19402 invoked from network); 2 Nov 2003 00:50:31 -0000 Received: from unknown (HELO netmail01.services.quay.plus.net) (212.159.14.219) by mailstore with SMTP; 2 Nov 2003 00:50:31 -0000 Received: (qmail 7922 invoked by uid 10001); 2 Nov 2003 00:50:31 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail01.services.quay.plus.net with SMTP; 2 Nov 2003 00:50:24 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AG6Qf-0007lD-7P for rsgb_lf_group-outgoing@blacksheep.org; Sun, 02 Nov 2003 00:49:17 +0000 Received: from [212.135.6.12] (helo=smarthost2.mail.uk.easynet.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AG6Qe-0007l4-Cd for rsgb_lf_group@blacksheep.org; Sun, 02 Nov 2003 00:49:16 +0000 Received: from tnt-5-197.easynet.co.uk ([195.40.200.197] helo=erica) by smarthost2.mail.uk.easynet.net with smtp (Exim 4.10) id 1AG6Qa-000IAy-00 for rsgb_lf_group@blacksheep.org; Sun, 02 Nov 2003 00:49:12 +0000 X-Bad-Message-ID: no DNS (erica) Message-ID: <000e01c3a0dc$eceb51c0$c5c828c3@erica> From: "g3ldo" To: rsgb_lf_group@blacksheep.org References: <000001c39fd6$baebd020$fce8c593@rsch15> <000701c3a0c3$698fbb40$2a1686d4@erica> Date: Sun, 2 Nov 2003 01:01:16 -0000 MIME-Version: 1.0 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 Subject: LF: Re: Strange Signal 2 Content-Type: multipart/mixed; boundary="------------060107070407050006010101" X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 This is a multi-part message in MIME format. --------------060107070407050006010101 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit Further to my earlier e-mail I have attached a pic of the signal at 0720 UTC. The signal is definitely not loran because it appears to have some sort of modulation. At 0721 I switched off and went to breakfast. 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rsgb_lf_group@blacksheep.org; Sat, 01 Nov 2003 21:46:49 +0000 Received: from tnt-13-42.easynet.co.uk ([212.134.22.42] helo=erica) by smarthost4.mail.uk.easynet.net with smtp (Exim 4.10) id 1AG3Zr-000GvH-00 for rsgb_lf_group@blacksheep.org; Sat, 01 Nov 2003 21:46:37 +0000 X-Bad-Message-ID: no DNS (erica) Message-ID: <000701c3a0c3$698fbb40$2a1686d4@erica> From: "g3ldo" To: rsgb_lf_group@blacksheep.org References: <000001c39fd6$baebd020$fce8c593@rsch15> Date: Sat, 1 Nov 2003 21:58:29 -0000 MIME-Version: 1.0 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 Subject: LF: Strange Signal Content-Type: multipart/mixed; boundary="------------090307020603000808020602" X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 This is a multi-part message in MIME format. --------------090307020603000808020602 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit Hello LF Group, I have been sifting through the hundreds of images recorded on my laptop during my stay in Marrakech. I had Argo running on record all nights except 17th October (celibrating my birthday with a bottle of wine and fell asleep!). The only Amateur signal that I saw was G3AQC although on the night previous I did record the attached image. There is no information on the signal that I can detect. It was visible all night with QSB peaking in the image and later at around 0700UTC. It has slight frequency variation and a sort of scattering effect. It never apeared again during the two week period. Can anyone guess what it is? I wasn't able to record when I was not in the room earlier in the evening. The reason was the hotel room door was opened with a magnetic strip card, which was then plugged into a slot to switch the electricity on. I guess I could have asked for an additional card but as the hotel management had already responded to my request for a room near the roof and had supplied a couple of maintenance guys to help me rig the antenna I felt it was a bit churlish to ask for more. 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EEtninZJBPBA9RSBN43DAoAQvkjHQUshUAbCfcZp0cLMRkjFG3DENyOwoAiDE8A0pB74pz4O BtC49KaxIOBgCkA4AEfeAPuKOo5PIppU4HSlLkDjA+lMBdoJ+YMv0FNXaGOfwp6ZLBWJ2+1D w7XPcUegDQzY44+lKrZHPJ+lAwRgk49qRiA20Dj60AKzEtjGBRkAFRRjggD9aXJdcHAA7igB pBGDge2KUkscn8qVUYqSCKU8IMgcUWAjHJyRxTyQuCp470ifO3HFI/BI9KAJJG8wjb+tM3bS AArfXmlwcLg4z6UFFRsNkk9MUAJyQSRge4pMk4BPHvQwIGc8emaCDxnBBoAeUTIOQB7ilwrD GRgd+1R5JyFAFPUKPvZJpgR4IORwPWtPQYllvmVi2PLJyjFT1HcYqkEfbgFdp9qu6EjPfuqy vGRGeVAz1HqDUSWgI6K54hZzM8SoCzMoBOAPcGqzrci3hzcyLPIQoXCEAnJ545wM+mce9T/Z yybZJ5JBuVhuCjBBz2A9KkMQMyy5O5VKj0wcf4ViUVYJJvtH79p1DSOqAqmxsE4HTd0GefSr 1QC3HnCQySMFJZUJGFJHX17nvjn6VPQAUUUUAf/Z --------------090307020603000808020602-- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13167 invoked from network); 5 Nov 2003 20:32:10 -0000 Received: from unknown (HELO murphys.services.quay.plus.net) (212.159.14.225) by mailstore with SMTP; 5 Nov 2003 20:32:10 -0000 Received: (qmail 22806 invoked from network); 5 Nov 2003 20:32:01 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-Fake-Domain: unknown Received: from unknown (HELO post.thorcom.com) (193.82.116.20) by murphys.services.quay.plus.net with SMTP; 5 Nov 2003 20:31:56 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AHUHK-0002eM-MZ for rsgb_lf_group-outgoing@blacksheep.org; Wed, 05 Nov 2003 20:29:22 +0000 Received: from [213.40.2.15] (helo=bedpan.sout.netline.net.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1AHUHJ-0002e0-RU for rsgb_lf_group@blacksheep.org; Wed, 05 Nov 2003 20:29:21 +0000 Received: from [213.40.203.34] (helo=taylormade01) by bedpan.sout.netline.net.uk with smtp (Exim 4.24) id 1AHUGo-00049h-5v for rsgb_lf_group@blacksheep.org; Wed, 05 Nov 2003 20:28:50 +0000 From: "Gary - G4WGT" To: "Rsgb_Lf_Group" Date: Wed, 5 Nov 2003 20:29:42 -0000 Message-ID: MIME-Version: 1.0 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 Subject: LF: On Air Testing Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Hi all at LF, Still got problems with antenna, SWR looks OK on meter & changes when I tune variometer coil but PA mosfets get very hot but only warm on dummy load, also I have no antenna current (was showing 1.2 to 1.5 amps during ealier testing)but lots of RF at top of coil (got a little RF burn when my finger got too close), so still some work on antenna required ! Having replaced suspect capacitors with higher spec components the G0MRF Tx now producing 300 watts into dummy load. Whilst on the subject of dummy loads, are Metal Oxide resistors suitable for dummy loads ? because much higher ratings (5 watts) are available for same physical size as the 2 watt carbon film resistors in my home brew dummy load. 73 Gary - G4WGT --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.524 / Virus Database: 321 - Release Date: 06/10/2003 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19902 invoked from network); 3 Nov 2003 20:48:17 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 3 Nov 2003 20:48:17 -0000 Received: (qmail 1801 invoked by uid 10001); 3 Nov 2003 20:48:17 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 3 Nov 2003 20:48:06 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AGla4-0004TJ-0O for rsgb_lf_group-outgoing@blacksheep.org; Mon, 03 Nov 2003 20:45:44 +0000 Received: from [213.40.2.23] (helo=bodum.sout.netline.net.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1AGla3-0004T6-Gx for rsgb_lf_group@blacksheep.org; Mon, 03 Nov 2003 20:45:43 +0000 Received: from [213.40.204.111] (helo=taylormade01) by bodum.sout.netline.net.uk with smtp (Exim 4.24) id 1AGlZY-00005h-4L for rsgb_lf_group@blacksheep.org; Mon, 03 Nov 2003 20:45:12 +0000 From: "Gary - G4WGT" To: "Rsgb_Lf_Group" Date: Mon, 3 Nov 2003 20:45:56 -0000 Message-ID: MIME-Version: 1.0 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 Subject: LF: Re : Testing Again. Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Hello to all at LF, Had to abandon testing last night due to antenna fault. I think I have found the problem (connector s/c) but I am only giving short duration tests tonight, I will possibly resume full testing tomorrow night (tusday 4th Nov) from about 2100 utc. 73 Gary - G4WGT --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.524 / Virus Database: 321 - Release Date: 06/10/2003 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29161 invoked from network); 2 Nov 2003 21:23:40 -0000 Received: from unknown (HELO netmail01.services.quay.plus.net) (212.159.14.219) by mailstore with SMTP; 2 Nov 2003 21:23:40 -0000 Received: (qmail 11182 invoked by uid 10001); 2 Nov 2003 21:23:39 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail01.services.quay.plus.net with SMTP; 2 Nov 2003 21:23:33 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AGPgi-00063w-S1 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 02 Nov 2003 21:23:08 +0000 Received: from [213.40.2.14] (helo=gourd.sout.netline.net.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1AGPgi-00063a-Cz for rsgb_lf_group@blacksheep.org; Sun, 02 Nov 2003 21:23:08 +0000 Received: from [213.40.202.219] (helo=taylormade01) by gourd.sout.netline.net.uk with smtp (Exim 4.24) id 1AGPgD-0002Go-4D for rsgb_lf_group@blacksheep.org; Sun, 02 Nov 2003 21:22:37 +0000 From: "Gary - G4WGT" To: "Rsgb_Lf_Group" Date: Sun, 2 Nov 2003 21:23:19 -0000 Message-ID: MIME-Version: 1.0 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 Subject: LF: Re : Testing Again Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Hi to all at LF again, Sorry, I did not include a frequency for my test transmission, it will be on or near 137,650 Khz. 73 Gary - G4WGT --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.524 / Virus Database: 321 - Release Date: 06/10/2003 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25413 invoked from network); 2 Nov 2003 21:01:04 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 2 Nov 2003 21:01:04 -0000 Received: (qmail 8188 invoked from network); 2 Nov 2003 21:01:04 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 2 Nov 2003 21:00:59 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AGPJS-0005fn-Im for rsgb_lf_group-outgoing@blacksheep.org; Sun, 02 Nov 2003 20:59:06 +0000 Received: from [213.40.2.15] (helo=bedpan.sout.netline.net.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1AGPJR-0005fY-O4 for rsgb_lf_group@blacksheep.org; Sun, 02 Nov 2003 20:59:05 +0000 Received: from [213.40.207.14] (helo=taylormade01) by bedpan.sout.netline.net.uk with smtp (Exim 4.24) id 1AGPIv-0005XU-V8 for rsgb_lf_group@blacksheep.org; Sun, 02 Nov 2003 20:58:34 +0000 From: "Gary - G4WGT" To: "Rsgb_Lf_Group" Date: Sun, 2 Nov 2003 20:59:15 -0000 Message-ID: MIME-Version: 1.0 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 Subject: LF: Testing Again Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Hi to all at LF, Power supply upgrade completed (as previously reported), replaced PA MOSFETS distroyed during bench testing, also replaced damaged RF ground return cap (output transformer centre tap), found high level of RF on supply lines from PSU at high RF power output, added some extra decoupling on supply line input to Tx to resolve. Now to resume on air testing, starting tonight (2nd November 2003 from about 2100 utc). The new power level on lowest setting is now same as highest when using previous power supply (130 watts), not going up to high power until I have upgraded spike protection components, I should then be able to achieve 300 watts. The test transmission text will indicate power level as shown :- Call sign ID at 6 wpm followed by QRSS3 text TEST 130W G4WGT 73 Gary - G4WGT From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14640 invoked from network); 26 Nov 2003 11:08:53 -0000 Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 26 Nov 2003 11:08:53 -0000 Received: (qmail 25269 invoked from network); 26 Nov 2003 11:08:59 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by warrior.services.quay.plus.net with SMTP; 26 Nov 2003 11:07:39 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOxU3-0001NX-PD for rsgb_lf_group-outgoing@blacksheep.org; Wed, 26 Nov 2003 11:05:23 +0000 Received: from [62.253.164.42] (helo=mta2-svc.business.ntl.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AOxU3-0001NN-8z for rsgb_lf_group@blacksheep.org; Wed, 26 Nov 2003 11:05:23 +0000 X-Fake-Domain: l8p8y6 Received: from l8p8y6 ([62.252.228.130]) by mta2-svc.business.ntl.com (InterMail vM.4.01.03.37 201-229-121-137-20020806) with SMTP id <20031126110522.RQTW28456.mta2-svc.business.ntl.com@l8p8y6> for ; Wed, 26 Nov 2003 11:05:22 +0000 X-Bad-Message-ID: no DNS (l8p8y6) Message-ID: <000201c3b40d$71dba360$82e4fc3e@l8p8y6> From: "hamilton mal" To: rsgb_lf_group@blacksheep.org References: <001201c3b219$9bce9740$0100000a@ct1eeb> Date: Tue, 25 Nov 2003 18:36:44 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4807.1700 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: Re: Re: R: CT1/G3KEV Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.4 required=5.0 tests=DATE_IN_PAST_12_24 autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 ----- Original Message ----- From: "Jose E. Ribeiro Sa" To: Sent: Sunday, November 23, 2003 11:29 PM Subject: LF: Re: R: CT1/G3KEV > Iam glad you enjoyed my country so much Mal. > > I guess you haven't forgot to ask ANACOM > (our licensing authority) for the special permits > authorizing you for the use of 6m., right ? > Don't forget 137 Khz are also authorized under > a special permit. > By the way this 2 bands are not allowed and included > in the CEPT agreement, so, you cannot TX in Portugal > in 137 Khz and 50 Mhz using the CEPT License, but, > I'm sure you hold a permanent (resident) license. > > I hold a 137 Khz special permit valid until 2005 and it says > 135.7 to 137.8 Khz with a max ERP of 1 Watt. > Yes, you read it well 1 WATT only. > Hope they will allow you more when you ask for your permit during > your next visit to the Algarve. > > See you in the LF. > > Jose CT1EEB > VK8CS, former 4W6EB > http://www.qsl.net/ct1eeb Hello Jose Nice to hear from you. Tnx for the info. I made arrangements on previous visits for all the permitted bands in Portugal. I will be struggling with my portable LF equipment to generate 1W erp maybe 0.5W if I am lucky hi The Algarve is a wonderful place and I will be going again plus some time around Lisboa. 73 de Mal/G3KEV > > Da: hamilton mal > A: rsgb_lf_group@blacksheep.org > Oggetto: LF: CT1/G3KEV > Data: martedì 18 novembre 2003 18.14 > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1146 invoked from network); 21 Nov 2003 16:46:36 -0000 Received: from unknown (HELO murphys.services.quay.plus.net) (212.159.14.225) by mailstore with SMTP; 21 Nov 2003 16:46:36 -0000 Received: (qmail 25657 invoked from network); 21 Nov 2003 16:46:24 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by murphys.services.quay.plus.net with SMTP; 21 Nov 2003 16:46:16 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ANEOW-0002BG-GG for rsgb_lf_group-outgoing@blacksheep.org; Fri, 21 Nov 2003 16:44:32 +0000 Received: from [62.253.164.42] (helo=mta2-svc.business.ntl.com) by post.thorcom.com with esmtp (Exim 4.14) id 1ANEOV-0002B7-MN for rsgb_lf_group@blacksheep.org; Fri, 21 Nov 2003 16:44:31 +0000 X-Fake-Domain: l8p8y6 Received: from l8p8y6 ([62.252.204.72]) by mta2-svc.business.ntl.com (InterMail vM.4.01.03.37 201-229-121-137-20020806) with SMTP id <20031121164430.SGOZ28456.mta2-svc.business.ntl.com@l8p8y6> for ; Fri, 21 Nov 2003 16:44:30 +0000 X-Bad-Message-ID: no DNS (l8p8y6) Message-ID: <001701c3b04f$00630460$48ccfc3e@l8p8y6> From: "hamilton mal" To: rsgb_lf_group@blacksheep.org Date: Fri, 21 Nov 2003 16:45:51 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4807.1700 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: CT/G3KEV Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,HTML_MESSAGE autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Content-transfer-encoding: 8bit
Hi All
In reply to some observations about my recent CT/G3KEV message.
 
The EL morse key has a solid metal base to keep it from shifting about when keying. It and the transceiver were carried in my hand cabin baggage. The bag was carefully packed to avoid damage but I had to empty and repack it at security. The carbon fibre 10 metre retractable mast went through the FRAGILE items desk from LEEDS but on the return journey I decided to carry it as cabin baggage from FARO but when boarding the aircraft a member of staff took it and put it in the hold as a fragile item. The walking stick approach did not work for me, I forgot to limp and looked too young anyway  !!!!!!!!!!!
There seems to be a lof of variations in procedures at airports. All the personal luggage and radio equipment got there and back without damage so I cannot complain,  in fact the whole operation was very efficient and no delays.
 
73 de Mal/G3KEV
 
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2005 invoked from network); 18 Nov 2003 20:02:45 -0000 Received: from unknown (HELO netmail01.services.quay.plus.net) (212.159.14.219) by mailstore with SMTP; 18 Nov 2003 20:02:45 -0000 Received: (qmail 6159 invoked by uid 10001); 18 Nov 2003 20:02:45 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail01.services.quay.plus.net with SMTP; 18 Nov 2003 20:02:25 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AMC1o-0003uZ-EQ for rsgb_lf_group-outgoing@blacksheep.org; Tue, 18 Nov 2003 20:00:48 +0000 Received: from [62.253.164.47] (helo=mta7-svc.business.ntl.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AMC1n-0003uQ-JY for rsgb_lf_group@blacksheep.org; Tue, 18 Nov 2003 20:00:47 +0000 X-Fake-Domain: l8p8y6 Received: from l8p8y6 ([62.252.211.102]) by mta7-svc.business.ntl.com (InterMail vM.4.01.03.37 201-229-121-137-20020806) with SMTP id <20031118200041.DGRU12849.mta7-svc.business.ntl.com@l8p8y6> for ; Tue, 18 Nov 2003 20:00:41 +0000 X-Bad-Message-ID: no DNS (l8p8y6) Message-ID: <001201c3ae0e$eb51fd20$66d3fc3e@l8p8y6> From: "hamilton mal" To: rsgb_lf_group@blacksheep.org Date: Tue, 18 Nov 2003 17:14:36 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4807.1700 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: CT1/G3KEV Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=HTML_MESSAGE autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Content-transfer-encoding: 8bit
Hi All
I have just returned from CT1/Algarve and had a great time dxing from there. CT1 is fairly rare, the radio amateur population is low compared to most other EU countries. I did work three LF operators on the higher frequencies OK1DTN, G0MRF and G3YMC and several hundred others world wide on various bands from 160 to 6 metres.
The 6 metre band was interesting from the south coast of Portugal. I worked a number of ZS6 stations, V51E, TR8CA and RW1AY/MM in the South Atlantic off the West African coast. I did hear the UK beacon GB3MCB but no UK stations.
I took all the necessary radio equipment and antennas with me. The portable station consisted of an ICOM 706 and a small 25A smpsu. The Antenna was an 80 metre doublet up at a height of about 18 metres and a suitable ATU to match the antenna on all bands to the transceiver.
Everything worked well without snags. At my CT1 qth there was plenty of room for antennas for the LF bands even 137 khz and next time I might try it. I have arranged an even better qth next time with a villa and 20 acres of vineyard for antennas plus the swimming pool for a good earth.
No one around my qth seemed bothered by my antenna mast and antennas. Most of the Algarve is covered by large 1- 2 metre satellite dishes and other large poles with TV antennas attached. Antennas of all varities are the norm there and the odd radio amateur mast and antennas just blends in hi . A big difference from the UK where some Councils insist on planning consent for small dishes that you could hardly see and a pole higher than the normal washing line is prohibited!!!!!!!
It could be time to move South West to a villa with swimming pool, vineyard and no planning needed for masts and antennas all at affordable prices, plus good food, good beer and brandy and  GOOD SERVICE at the right price.
Airport security at LEEDS very thorough, when my equipment passed the xray machine all the lights and buzzers went off because of one dangerous looking item. I had to unpack one bag and the suspect item was my MORSE key. They had not encountered one of these devices before. One the way back at FARO airport the security xray light up just the same flashing lights etc but the man just waved me on, he obviously knows all about amateur radio and morse keys !!!!!!!!!!!!!
 
73 de Mal/G3KEV
 
 
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28412 invoked from network); 28 Nov 2003 22:23:35 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by ptb-mailstore with SMTP; 28 Nov 2003 22:23:35 -0000 Received: (qmail 28796 invoked from network); 28 Nov 2003 22:23:34 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 28 Nov 2003 22:23:29 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1APqxA-00010R-9f for rsgb_lf_group-outgoing@blacksheep.org; Fri, 28 Nov 2003 22:19:08 +0000 Received: from [217.72.192.165] (helo=mailgate5.cinetic.de) by post.thorcom.com with esmtp (Exim 4.14) id 1APqx9-00010E-55 for rsgb_lf_group@blacksheep.org; Fri, 28 Nov 2003 22:19:07 +0000 Received: from web.de (fmomail01.dlan.cinetic.de [172.20.1.45]) by mailgate5.cinetic.de (8.11.6p2/8.11.2/SuSE Linux 8.11.0-0.4) with SMTP id hASMIaQ09107 for rsgb_lf_group@blacksheep.org; Fri, 28 Nov 2003 23:18:36 +0100 Date: Fri, 28 Nov 2003 23:18:36 +0100 Message-ID: <200311282218.hASMIaQ09107@mailgate5.cinetic.de> MIME-Version: 1.0 Organization: http://freemail.web.de/ From: "Hans-Albrecht Haffa" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Dummy-Load on LW 50 Ohm/ 60 Ohm/ 75 Ohm Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.1 required=5.0 tests=HTML_MESSAGE,MIME_HTML_ONLY autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1

 

Dear Lowfers,

the reason for a characteristic resistance of coaxial cables  is based on material constants and by finding a minimum of the maximum field strenth in the cable.  This is true as well for high frequency cables and high voltage cables for energy transport. The maximum field strength is just on the surface of the inner conductor.  Material constants are the conductivity of the copper or silver for the inner conductor and the outer shield. As well as the dielectic losses of the insulation (leakage and polarisation losses). In United States an optimum of about 50 Ohm was calculated in the forties, and kept on in transmitting equipment.  In the sixties 60 Ohm was the resistance for a minimum of losses, in cable broadcast nets in the eigties 75 Ohm is a! n optimum.

55, Hans-Albrecht

DK 8 ND

 

 

may rsgb_lf_group@blacksheep.org schrieb am 12.11.03 01:18:51:
>
> Dear all,
>
> around 1959, when I joined Rohde&Schwarz in Munich, 60 ohms has been the standard cable impedance in Germany for all broadcast and television transmitters in the fifties and for other commercial RF equipment. Cage and other transmitting antennas were also designed for 60 ohms. I have also built my first amateur radio dummy load for 60 ohms.
>
> I do not know exactly the reason for 60 ohms, somebody has told me that this impedance has been a compromise between 50 ohms and 75 ohms, (perhaps following the idea that 75 ohms allows the production of cables with minimum losses whilst 50 ohms would allow to send higher power through a coaxial cable).
>
> On the other hand 75 ohm ! s has been used and is still in use for video equipment in TV transmit ters and studio equipment; higher video voltages needed for TV modulator stages have often been terminated with 150 ohms to save power, generating double the voltage with the same current.
>
> But in the sixties a change to 50 ohms impedance for RF equipment became standard also in Germany, there was a need to match to the international market standards.
>
> Concerning receiving antennas, the first VHF FM and TV antennas in the early fifties in Germany were folded dipoles with a 300 ohms symmetrical cable feed. But soon the folded dipole with reflector (and some directors) became popular, using 240 ohms symmetrical cable for about two decades (thus confirming Wolf's [DL4YHF] contribution), TV distribution systems in houses used 60 ohms with a 4:1 balun to connect the antennas (for the TV receivers with 240 ohms symmetrical input another 1:4 balun was needed to connect them to the 60 ohms house system). Later on TV receivers and TV receiving antenna ! s were changed to 75 Ohms coaxial, CATV systems used 75 ohms from the beginning, the CATV start in Germany has been rather late, about 1984.
>
> By the way, a lot of russian Surplus HF equipment which became available in Germany after the breakdown of the iron curtain, even automatic antenna tuners, were designed for 75 ohms impedance.
>
> 73 Ha-Jo, DJ1ZB
>
>
> "Walter Blanchard" <blanch@pncl.co.uk> schrieb:
> > DK8ND's email raises an interesting point. Can any of our German friends tell me why an impedance of 60 ohms was popular in Germany for some time but not anywhere else?
> >
> > Walter G3JKV.
> >
> >
> >
> >
> > ---
> >
> > Checked by AVG anti-virus system (http://www.grisoft.com).
> > Version: 6.0.525 / Virus Database: 322 - Release Date: 09/10/03
>
>
>

______________________________________________________________________________
WEB.DE FreeMail wird 5 Jahre jung! Feiern Sie mit uns und
nutzen Sie die neuen Funktionen http://f.web.de/features/?mc=021130 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5431 invoked from network); 11 Nov 2003 16:24:33 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 11 Nov 2003 16:24:33 -0000 Received: (qmail 521 invoked by uid 10001); 11 Nov 2003 16:24:32 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 11 Nov 2003 16:23:11 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AJbGm-0008Kc-Ry for rsgb_lf_group-outgoing@blacksheep.org; Tue, 11 Nov 2003 16:21:32 +0000 Received: from [217.72.192.165] (helo=mailgate5.cinetic.de) by post.thorcom.com with esmtp (Exim 4.14) id 1AJbGm-0008KS-0k for rsgb_lf_group@blacksheep.org; Tue, 11 Nov 2003 16:21:32 +0000 Received: from web.de (fmomail01.dlan.cinetic.de [172.20.1.45]) by mailgate5.cinetic.de (8.11.6p2/8.11.2/SuSE Linux 8.11.0-0.4) with SMTP id hABGL1Q21253 for rsgb_lf_group@blacksheep.org; Tue, 11 Nov 2003 17:21:01 +0100 Date: Tue, 11 Nov 2003 17:21:01 +0100 Message-ID: <200311111621.hABGL1Q21253@mailgate5.cinetic.de> MIME-Version: 1.0 Organization: http://freemail.web.de/ From: "Hans-Albrecht Haffa" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Dummy-Load on LW Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.7 required=5.0 tests=HTML_20_30,HTML_FONT_BIG,HTML_MESSAGE,MIME_HTML_ONLY autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1

Dear Lowfers,

for my experiments I use commercial dummy loads, like my Rohde & Schwarz RD1/60, oil filled, 1 kW /60 Ohm with monitor output attenuation of about 40 dB with Dezifix-connectors (the sexless Bajonnet ones ...). A dry portable 150 W-Version I have too.

I definitely do not recommend homebrew constructions at these high power ratings. The danger of fire is to big, and resistors of adequate power rating are expensive too.  I bought  my collecton of attenuators at Ham Radio fair at modest prizes.  60 Ohm equipment  is not what hams like, but Power error is minimal when the attenuator output is terminated by a 50 Ohm-Power-Meter, or is not terminated at all (after an attenuation of 30ddbB or more ).

An other possible equipment is the noisy test load  KAM, "Kunstantenne mit Meßausgang" from late German Democratic Republic, designed for the transmitter KSG1300.

55, Hans-Albrecht

DK 8 ND

 

 

 

rsgb_lf_group@blacksheep.org schrieb am 08.11.03 18:52:32:
>
>
> With all the comments on Loads,,, put them in a container and add mineral
> oil
> would really boost their rating ,, just allow for some venting
>
> Bob K3DJC
>
> On Sat, 8 Nov 2003 01:23:05 +0100 0482183881-0001@t-online.de (jannsen)
> writes:
> > James Moritz schrieb:
> >
> > ...............
> >
> > > Several people have resorted to electric heating elements like
> > > toasters and fan heaters to make satisfactory LF dummy loads.
> >
> > Hi Jim es all,
> >
> > here are two dummy loads in use; one is a bulb 110V/DC500W, Z 35 Ohm
> > on 136kHz
> > (bridge measurement) and the other is made of four hollow ceramic
> > resistors
> > 200 Ohm/60W each, makes 200W only. but blowing air through the
> > resistors
> > (see attachment) makes a lukewarm 300W dummy on 136kHz (0,4uH only).
> >
> > I tried 800W. A peace of paper above the dummy caught fire within 10
> > sec.
> >
> > regards
> > Uwe/dj8wx
> >
> >
> >
>

______________________________________________________________________________
WEB.DE FreeMail wird 5 Jahre jung! Feiern Sie mit uns und
nutzen Sie die neuen Funktionen http://f.web.de/features/?mc=021130 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28495 invoked from network); 12 Nov 2003 00:13:18 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 12 Nov 2003 00:13:18 -0000 Received: (qmail 21062 invoked by uid 10001); 12 Nov 2003 00:13:17 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 12 Nov 2003 00:13:00 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AJiZE-0006n7-J3 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 12 Nov 2003 00:09:04 +0000 Received: from [194.25.134.17] (helo=mailout02.sul.t-online.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AJiZD-0006my-UT for rsgb_lf_group@blacksheep.org; Wed, 12 Nov 2003 00:09:04 +0000 X-Fake-Domain: fwd02.aul.t-online.de Received: from fwd02.aul.t-online.de by mailout02.sul.t-online.com with smtp id 1AJiZ8-000771-00; Wed, 12 Nov 2003 01:08:58 +0100 Received: from 127.0.0.1 (Z2acr-Z6YeaOCfwunIguUUJi5EJu+rPpYx1ZOWDKb4zrJpQujt9CEw@[217.2.67.133]) by fwd02.sul.t-online.com with smtp id 1AJiZ0-0owAhU0; Wed, 12 Nov 2003 01:08:50 +0100 MIME-Version: 1.0 From: "Hans-Joachim Brandt" To: rsgb_lf_group@blacksheep.org X-Mailer: T-Online eMail 4.111 Date: 11 Nov 2003 23:45 GMT Message-ID: <1AJiZ0-0owAhU0@fwd02.sul.t-online.com> X-Seen: false X-ID: Z2acr-Z6YeaOCfwunIguUUJi5EJu+rPpYx1ZOWDKb4zrJpQujt9CEw Subject: Re: LF: Dummy-Load on LW Content-Type: Text/Plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Dear all, around 1959, when I joined Rohde&Schwarz in Munich, 60 ohms has been the standard cable impedance in Germany for all broadcast and television transmitters in the fifties and for other commercial RF equipment. Cage and other transmitting antennas were also designed for 60 ohms. I have also built my first amateur radio dummy load for 60 ohms. I do not know exactly the reason for 60 ohms, somebody has told me that this impedance has been a compromise between 50 ohms and 75 ohms, (perhaps following the idea that 75 ohms allows the production of cables with minimum losses whilst 50 ohms would allow to send higher power through a coaxial cable). On the other hand 75 ohms has been used and is still in use for video equipment in TV transmitters and studio equipment; higher video voltages needed for TV modulator stages have often been terminated with 150 ohms to save power, generating double the voltage with the same current. But in the sixties a change to 50 ohms impedance for RF equipment became standard also in Germany, there was a need to match to the international market standards. Concerning receiving antennas, the first VHF FM and TV antennas in the early fifties in Germany were folded dipoles with a 300 ohms symmetrical cable feed. But soon the folded dipole with reflector (and some directors) became popular, using 240 ohms symmetrical cable for about two decades (thus confirming Wolf's [DL4YHF] contribution), TV distribution systems in houses used 60 ohms with a 4:1 balun to connect the antennas (for the TV receivers with 240 ohms symmetrical input another 1:4 balun was needed to connect them to the 60 ohms house system). Later on TV receivers and TV receiving antennas were changed to 75 Ohms coaxial, CATV systems used 75 ohms from the beginning, the CATV start in Germany has been rather late, about 1984. By the way, a lot of russian Surplus HF equipment which became available in Germany after the breakdown of the iron curtain, even automatic antenna tuners, were designed for 75 ohms impedance. 73 Ha-Jo, DJ1ZB "Walter Blanchard" schrieb: > DK8ND's email raises an interesting point. Can any of our German friends tell me why an impedance of 60 ohms was popular in Germany for some time but not anywhere else? > > Walter G3JKV. > > > > > --- > > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.525 / Virus Database: 322 - Release Date: 09/10/03 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4830 invoked from network); 8 Nov 2003 01:36:05 -0000 Received: from unknown (HELO marstons.services.quay.plus.net) (212.159.14.223) by mailstore with SMTP; 8 Nov 2003 01:36:05 -0000 Received: (qmail 20793 invoked by uid 10001); 8 Nov 2003 01:36:05 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by marstons.services.quay.plus.net with SMTP; 8 Nov 2003 01:35:45 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AIHz4-0000Wl-CH for rsgb_lf_group-outgoing@blacksheep.org; Sat, 08 Nov 2003 01:33:50 +0000 Received: from [194.25.134.83] (helo=mailout07.sul.t-online.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AIHz3-0000Wc-Nf for rsgb_lf_group@blacksheep.org; Sat, 08 Nov 2003 01:33:49 +0000 X-Fake-Domain: fwd05.aul.t-online.de Received: from fwd05.aul.t-online.de by mailout07.sul.t-online.com with smtp id 1AIHyy-0006iN-04; Sat, 08 Nov 2003 02:33:44 +0100 Received: from 127.0.0.1 (Z4-YjBZpoeTFYeDBiD4gr9Nuo8sgsCdUZk67-kQqbQTEy4KUBVkFYG@[217.2.40.14]) by fwd05.sul.t-online.com with smtp id 1AIHyv-25VU5x0; Sat, 8 Nov 2003 02:33:41 +0100 MIME-Version: 1.0 From: "Hans-Joachim Brandt" To: rsgb_lf_group@blacksheep.org X-Mailer: T-Online eMail 4.111 Date: 08 Nov 2003 01:32 GMT Message-ID: <1AIHyv-25VU5x0@fwd05.sul.t-online.com> X-Seen: false X-ID: Z4-YjBZpoeTFYeDBiD4gr9Nuo8sgsCdUZk67-kQqbQTEy4KUBVkFYG Subject: LF: Re: Dummy loads for LF Content-Type: Text/Plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Dear all, for the time being I am using a dummy load made of ten low inductivity DALE resistors Type NH-50, 499 ohms each, in parallel on a large aluminum cooler (the fins of which could even be immersed into water when necessary), which could be used up to 30 MHz with a coil/capacitor matching arrangement at the input resulting in an VSWR of about 1,2. The matching arrangement has been designed about ten years ago in my qrl by measuring R and X of the parallel resistor arrangement over the frequency range and trying to find a suitable match by employing the old Supercompact software or the ARRL Radio Designer. Therefore I guess (I have not tried it yet, no need to do so) for such a small band like 136 kHz it should be possible to build a dummy load using ordinary wirewound resistors (preferably DALE or similars because of their easy mounting on a cooler surface) because their inductance could be cancelled by a suitable capacitance in parallel, or by several distributed capacitors within the parallel resistor arrangement. It should be rather simple to determine the capacitance needed, a VSWR meter designed for LF should do it. HW? 73 Ha-Jo, DJ1ZB "James Moritz" schrieb: > > Whilst on the subject of dummy loads, are Metal Oxide resistors suitable > for > dummy loads ? because much higher ratings (5 watts) are available for > same > physical size as the 2 watt carbon film resistors in my home brew dummy > load. > > 73 > > Gary - G4WGT > > > Dear Gary, LF Group, > > The metal oxide types would be fine, as are metal film, etc. In fact, > even some types of wirewound resistors are reasonably non-reactive at > 136kHz. Several people have resorted to electric heating elements like > toasters and fan heaters to make satisfactory LF dummy loads. But > obviously, it is a safer bet to stick to known low inductance types like > carbon, metal oxide and metal film unless you have the equipment to > evaluate the actual RF impedance. > > The Vishay RCH50 50W film resistors sold by RS components are pretty > good value at about 2-3 pounds each, and work OK up to HF - but > obviously you need a hefty heatsink as well as the resistors. > > Cheers, Jim Moritz > 73 de M0BMU > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20780 invoked from network); 7 Nov 2003 22:59:44 -0000 Received: from unknown (HELO murphys.services.quay.plus.net) (212.159.14.225) by mailstore with SMTP; 7 Nov 2003 22:59:44 -0000 Received: (qmail 18643 invoked from network); 7 Nov 2003 22:59:35 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by murphys.services.quay.plus.net with SMTP; 7 Nov 2003 22:59:28 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AIFVO-0006Zz-Fu for rsgb_lf_group-outgoing@blacksheep.org; Fri, 07 Nov 2003 22:55:02 +0000 Received: from [212.1.130.143] (helo=smtp-1.visp.telinco.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AIFVN-0006Zq-QO for rsgb_lf_group@blacksheep.org; Fri, 07 Nov 2003 22:55:01 +0000 Received: from [80.40.0.143] (helo=hughspc) by smtp-1.visp.telinco.net with smtp (Exim 3.36 #1) id 1AIFSu-0004Fa-00 for rsgb_lf_group@blacksheep.org; Fri, 07 Nov 2003 22:52:29 +0000 X-Bad-Message-ID: no DNS (hughspc) Message-ID: <001a01c3a582$1e826760$5c704ac3@hughspc> From: "Hugh" To: rsgb_lf_group@blacksheep.org References: <000001c3a52a$93ce5bd0$fce8c593@rsch15> Date: Fri, 7 Nov 2003 22:52:51 -0000 MIME-Version: 1.0 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 Subject: LF: Re: RE: On Air Testing Content-Type: multipart/mixed; boundary="------------000904060309010904040200" X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 This is a multi-part message in MIME format. --------------000904060309010904040200 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit Hi Gary, Jim beat me to it, I was going to suggest using the Vishay film resistors. Photo attached of a dummy load I made using two 100 ohm RCH50 resistors in parallel. I think I got them from Farnell. It seems to work fine on all HF bands and will take 100W for longer than I've ever tried it ! The heatsink was bought cheaply at a radio rally. 73 Hugh ----- Original Message ----- From: James Moritz To: Sent: Friday, November 07, 2003 12:27 PM Subject: LF: RE: On Air Testing > > Whilst on the subject of dummy loads, are Metal Oxide resistors suitable > for > dummy loads ? because much higher ratings (5 watts) are available for > same > physical size as the 2 watt carbon film resistors in my home brew dummy > load. > > 73 > > Gary - G4WGT > > > Dear Gary, LF Group, > > The metal oxide types would be fine, as are metal film, etc. In fact, > even some types of wirewound resistors are reasonably non-reactive at > 136kHz. Several people have resorted to electric heating elements like > toasters and fan heaters to make satisfactory LF dummy loads. But > obviously, it is a safer bet to stick to known low inductance types like > carbon, metal oxide and metal film unless you have the equipment to > evaluate the actual RF impedance. > > The Vishay RCH50 50W film resistors sold by RS components are pretty > good value at about 2-3 pounds each, and work OK up to HF - but > obviously you need a hefty heatsink as well as the resistors. > > Cheers, Jim Moritz > 73 de M0BMU > > > --------------000904060309010904040200 Content-Type: image/jpeg; name="Heatsink.jpg" Content-Transfer-Encoding: base64 Content-Disposition: inline; filename="Heatsink.jpg" /9j/4AAQSkZJRgABAAEGWgZaAAD//gAXVS1MZWFkIFN5c3RlbXMsIEluYy4A/9sAhAAYEBIV Eg8YFRMVGxkYHCQ8JyQhISRJNDcrPFdMW1pVTFRSYGyKdWBmgmdSVHijeYKOk5qcml1zqbWo lrSKl5qUARkbGyQfJEYnJ0aUY1RjlJSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUlJSU lJSUlJSUlJSUlJSUlJSUlJT/4QAkIgAAAFVMSlEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABG AP/EAaIAAAEFAQEBAQEBAAAAAAAAAAABAgMEBQYHCAkKCwEAAwEBAQEBAQEBAQAAAAAAAAEC 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--------------000904060309010904040200-- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 693 invoked from network); 19 Nov 2003 20:46:53 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 19 Nov 2003 20:46:53 -0000 Received: (qmail 27565 invoked by uid 10001); 19 Nov 2003 20:46:52 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 19 Nov 2003 20:45:38 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AMZ9J-00033Q-W7 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 19 Nov 2003 20:42:05 +0000 Received: from [62.253.164.42] (helo=mta2-svc.business.ntl.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AMZ9J-00033H-IQ for rsgb_lf_group@blacksheep.org; Wed, 19 Nov 2003 20:42:05 +0000 X-Fake-Domain: p4o2b7 Received: from p4o2b7 ([62.252.208.71]) by mta2-svc.business.ntl.com (InterMail vM.4.01.03.37 201-229-121-137-20020806) with SMTP id <20031119204204.PSIB28456.mta2-svc.business.ntl.com@p4o2b7> for ; Wed, 19 Nov 2003 20:42:04 +0000 X-Bad-Message-ID: no DNS (p4o2b7) Message-ID: <000101c3aedd$b13d5ce0$5967fea9@p4o2b7> From: "Ian Kyle" To: rsgb_lf_group@blacksheep.org Date: Wed, 19 Nov 2003 20:18:33 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: LF activity. Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Now back monitoring 136 again, and also building a new TX. So far (last three nights) nothing seen T/A but have been fiddling around with settings so not sure that things are properly set up. Will post when I have something definite. 73, Ian GI8AYZ/MI0AYZ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 62584 invoked from network); 29 Nov 2003 13:27:22 -0000 Received: from unknown (HELO murphys.services.quay.plus.net) (212.159.14.225) by ptb-mailstore with SMTP; 29 Nov 2003 13:27:22 -0000 Received: (qmail 13131 invoked from network); 29 Nov 2003 13:27:11 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by murphys.services.quay.plus.net with SMTP; 29 Nov 2003 13:27:02 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AQ53g-0002T9-2q for rsgb_lf_group-outgoing@blacksheep.org; Sat, 29 Nov 2003 13:22:48 +0000 Received: from [194.73.73.147] (helo=einsteinium.btinternet.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AQ53f-0002T0-Al for rsgb_lf_group@blacksheep.org; Sat, 29 Nov 2003 13:22:47 +0000 Received: from host213-122-82-27.in-addr.btopenworld.com ([213.122.82.27] helo=rogersservices) by einsteinium.btinternet.com with esmtp (Exim 3.22 #25) id 1AQ53c-0001xT-00 for rsgb_lf_group@blacksheep.org; Sat, 29 Nov 2003 13:22:45 +0000 X-Bad-Message-ID: no DNS (rogersservices) Message-ID: <001001c3b67b$6a1fafc0$1b527ad5@rogersservices> From: "James Moritz" To: rsgb_lf_group@blacksheep.org References: <2D280BB697C7EE4C979C5C89925418EF0181DBEA@TNS-FBU-2E-003.corp.telenor.no> Date: Sat, 29 Nov 2003 13:18:40 -0000 MIME-Version: 1.0 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 Subject: LF: Re: Tuning LF inductors and inexpensive 10000pF variable capacitors Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.2 required=5.0 tests=HTML_FONTCOLOR_BLUE,HTML_FONT_BIG,HTML_MESSAGE autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Content-transfer-encoding: 8bit
Dear Jan-Martin, LF Group,
 
>somewhat puzzled that it hasn't been any discussions about the technique
>mentioned by G3VA Pat in last Radcom (11/2003).
 
The idea of using the drain-gate capacitance of biased-off power MOSFETs as high power varactors is interesting. I attended the conference at University of Bath where the paper mentioned in Technical Topics was presented, and WA1WLW's talk was very good. (There seemed to be a lot of amateurs about - a number of other subscribers to this reflector were there; I presented a paper about LF antenna measurements). The Q of these MOSFET-varactors was about 30-100 at HF. In the paper, they were used as tunable elements in a HF PA matching network with a fairly low loaded Q, so a high Q tuning element was not essential. For LF transmitting antenna matching, a rather higher Q would be desirable.  For a small-signal application (like a preselector or a VCO), it should be possible to use lower voltage power MOSFETs. As an experiment, I did some measurements with a back-back pair of STW34NB20 MOSFETs (200V, 34A). With a bias voltage of 5 - 200V, capacitance range was 750p - 140p, with most of the variation at the lower voltage end, as you would expect with varicaps. Rough measurements of Q (using a 3.6mH pot core inductor over a frequency range of 97kHz - 230kHz) gave values between about 500 and 1500, with higher values for higher capacitances. So this is obviously a useable technique for LF - the high tuning voltage is a bit awkward to produce, but would result in good linearity. Looking at the data sheets, similar capacitance variation can be achieved with lower tuning voltages by using MOSFETs with lower breakdown Vdss. I guess higher BVdss MOSFETs could be used for LF antenna tuning, especially if used as a "fine tuning" device making up a fraction of the total capacitance.
 
The idea of applying a magnetic bias to a ferrite core to vary the incremental permeability and so produce a tunable inductor has been around for quite a while - apart from the previous articles cited in Technical Topics. In the old RSGB "LF experimenter's sourcebook" there is an article about a tunable LF converter using mechanically moveable permanent magnets to bias a toroid core, which is apparently a re-print of an article from "Ham Radio" by OH2KT from 1974. I guess the problem with such a device is finding a ferrite material that gives at the same time a reasonably high Q, and a usefully large swing of inductance. To get a large inductance swing requires a ferrite with a high initial permeability - such ferrites unfortunately tend also to have high losses . Lower permeability ferrite has higher Q, but would need higher DC control current to get the same bias magnetic flux, and also would give less change in inductance. An air-gapped high permeability core like a pot core wouldn't really work because the reluctance is mostly determined by the air gap rather than the ferrite. The Technical Topics article is apparently aimed at MF/HF, but I think the idea would work better at VLF/LF, because high-permeability ferrites have lower loss in that range.
 
Cheers, Jim Moritz
73 de M0BMU
 
 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29990 invoked from network); 27 Nov 2003 15:04:17 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 27 Nov 2003 15:04:17 -0000 Received: (qmail 21792 invoked by uid 10001); 27 Nov 2003 15:04:15 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 27 Nov 2003 15:03:10 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1APNeR-0001Yi-Fl for rsgb_lf_group-outgoing@blacksheep.org; Thu, 27 Nov 2003 15:01:51 +0000 Received: from [147.197.200.9] (helo=hestia.herts.ac.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1APNeL-0001YZ-Cz for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2003 15:01:50 +0000 X-Fake-Domain: gemini Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 1APNdw-0005NI-00 for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2003 15:01:20 +0000 X-No-DNS-For: 147.197.232.252 Received: from [147.197.232.252] (helo=rsch15) by gemini.herts.ac.uk with esmtp (Exim 3.33 #1) id 1APNdu-0005a4-00 for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2003 15:01:18 +0000 From: "James Moritz" To: rsgb_lf_group@blacksheep.org Date: Thu, 27 Nov 2003 15:01:14 -0000 Organization: University of Hertfordshire X-Bad-Message-ID: no DNS (rsch15) Message-ID: <000001c3b4f7$5047f240$fce8c593@rsch15> MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2627 Importance: Normal In-reply-to: <3FC5977400001852@mail-4.tiscali.it> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-UH-MailScanner: No Virus detected Subject: RE: LF: Impedancebridge Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Dear Peter, LF Group, >Hello LFers, >is the Gereral Radio 1656 covering our LF-Band? I am not certain, but I believe this is an audio-frequency bridge - if it does work at 136k, it is probably with reduced specification. >May be that any impedance bridge using as RF detector some selective level >meter (pegelmesser) can help you for this measure. Selective level meters work very nicely as RF bridge detectors - Since it is only null detection that is needed, a receiver with "S" meter or output meter would also work fine. All you have to do is make sure there is enough attenuation between the bridge and RX/level meter so that the local QRM does not overload the front end. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22448 invoked from network); 21 Nov 2003 19:40:46 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 21 Nov 2003 19:40:46 -0000 Received: (qmail 3070 invoked from network); 21 Nov 2003 19:40:45 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 21 Nov 2003 19:40:39 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ANH7A-0004ZD-Ro for rsgb_lf_group-outgoing@blacksheep.org; Fri, 21 Nov 2003 19:38:48 +0000 Received: from [147.197.200.9] (helo=hestia.herts.ac.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1ANH79-0004Ym-GZ for rsgb_lf_group@blacksheep.org; Fri, 21 Nov 2003 19:38:47 +0000 X-Fake-Domain: gemini Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 1ANH6g-0004Tk-00 for rsgb_lf_group@blacksheep.org; Fri, 21 Nov 2003 19:38:18 +0000 X-No-DNS-For: 147.197.232.252 Received: from [147.197.232.252] (helo=rsch15) by gemini.herts.ac.uk with esmtp (Exim 3.33 #1) id 1ANH6f-0000F3-00 for rsgb_lf_group@blacksheep.org; Fri, 21 Nov 2003 19:38:17 +0000 From: "James Moritz" To: rsgb_lf_group@blacksheep.org Date: Fri, 21 Nov 2003 19:38:18 -0000 Organization: University of Hertfordshire X-Bad-Message-ID: no DNS (rsch15) Message-ID: <000201c3b067$03efc0b0$fce8c593@rsch15> MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2627 Importance: Normal In-reply-to: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-UH-MailScanner: No Virus detected Subject: LF: RE: Beacons stays on Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Dear Laurence, LF Group, Glad to hear the beacon will be staying a bit longer than expected - still no copy at the moment, conditions seem very poor. I am seeing VO1NA pop up out of the noise during the evening and morning most nights, but very weak or nothing at all between about 0000 and 0500 - certainly very much down on conditions during October. No identifiable sigs at all from any of the other North American beacons yet this winter, but I live in hope! Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5455 invoked from network); 18 Nov 2003 18:33:48 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 18 Nov 2003 18:33:48 -0000 Received: (qmail 18218 invoked from network); 18 Nov 2003 18:33:48 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 18 Nov 2003 18:33:37 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AMAaz-0002xQ-Cm for rsgb_lf_group-outgoing@blacksheep.org; Tue, 18 Nov 2003 18:29:01 +0000 Received: from [147.197.200.9] (helo=hestia.herts.ac.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1AMAat-0002xG-F9 for rsgb_lf_group@blacksheep.org; Tue, 18 Nov 2003 18:29:00 +0000 X-Fake-Domain: gemini Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 1AMAZZ-00007f-00 for rsgb_lf_group@blacksheep.org; Tue, 18 Nov 2003 18:27:33 +0000 X-No-DNS-For: 147.197.232.252 Received: from [147.197.232.252] (helo=rsch15) by gemini.herts.ac.uk with esmtp (Exim 3.33 #1) id 1AMAZX-00076R-00 for rsgb_lf_group@blacksheep.org; Tue, 18 Nov 2003 18:27:31 +0000 From: "James Moritz" To: rsgb_lf_group@blacksheep.org Date: Tue, 18 Nov 2003 18:27:32 -0000 Organization: University of Hertfordshire X-Bad-Message-ID: no DNS (rsch15) Message-ID: <000001c3ae01$a1cf3ee0$fce8c593@rsch15> MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2627 Importance: Normal In-reply-to: <002001c3adec$96036d80$6e1999c2@k7t> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-UH-MailScanner: No Virus detected Subject: LF: RE: Freq wobble Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Walter Blanchard Sent: 18 November 2003 15:56 To: rsgb_lf_group@blacksheep.org Subject: LF: Freq wobble >I've seen similar wobbles in GPS-disciplined standards. The fundamental >gradually drifts off then the GPS software algorithm slowly pulls them back >in again. How often and how far depends on the programming.... Dear Walter, LF Group, It's a bit of a big wobble - 0.5Hz at 137kHz amounts to about 4 parts per million, so I definitely wouldn't recommend that particular model of frequency standard if that is the case! I could not see any sign of it here in Brookmans Park. Perhaps it could be an intermod between a stable and an unstable signal at higher frequencies - or perhaps it could be a low-level birdie inside the RX from the digital stuff there - do G3LDO and G3YXM use the same rig? Cheers, Jim Moritz 73 de M0BMU --- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.525 / Virus Database: 322 - Release Date: 09/10/03 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17852 invoked from network); 13 Nov 2003 21:06:46 -0000 Received: from unknown (HELO netmail01.services.quay.plus.net) (212.159.14.219) by mailstore with SMTP; 13 Nov 2003 21:06:46 -0000 Received: (qmail 24565 invoked by uid 10001); 13 Nov 2003 21:06:46 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-Fake-Domain: unknown Received: from unknown (HELO post.thorcom.com) (193.82.116.20) by netmail01.services.quay.plus.net with SMTP; 13 Nov 2003 21:06:26 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AKObf-00080k-7k for rsgb_lf_group-outgoing@blacksheep.org; Thu, 13 Nov 2003 21:02:23 +0000 Received: from [194.73.73.147] (helo=einsteinium.btinternet.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AKObe-00080b-PP for rsgb_lf_group@blacksheep.org; Thu, 13 Nov 2003 21:02:22 +0000 X-Fake-Domain: host213-122-211-119.in-addr.btopenworld.com Received: from host213-122-211-119.in-addr.btopenworld.com ([213.122.211.119] helo=rogersservices) by einsteinium.btinternet.com with esmtp (Exim 3.22 #25) id 1AKObe-0004aL-00 for rsgb_lf_group@blacksheep.org; Thu, 13 Nov 2003 21:02:22 +0000 X-Bad-Message-ID: no DNS (rogersservices) Message-ID: <000f01c3aa28$fe0d3cc0$77d37ad5@rogersservices> From: "James Moritz" To: rsgb_lf_group@blacksheep.org References: Date: Thu, 13 Nov 2003 20:59:12 -0000 MIME-Version: 1.0 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 Subject: LF: Re: Beacon sigs Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 3 Dear LF Group, I have been looking for the various beacon signals around 137.77 or so most nights, but for the last few weeks I have only been seeing VO1NA. Since the recent solar activity, Joe's signal has only been readable around dawn for an hour or two - allthough last night the high noise levels seem to have knocked it out completely. I just looked at the spectrogram display, which has been running since last night, and was surprised to see that VO1NA has been a reasonable "M" copy around 2010utc - 2040utc. Worth keeping an eye on. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20958 invoked from network); 12 Nov 2003 19:33:50 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by mailstore with SMTP; 12 Nov 2003 19:33:50 -0000 Received: (qmail 5830 invoked from network); 12 Nov 2003 19:33:56 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-Fake-Domain: unknown Received: from unknown (HELO post.thorcom.com) (193.82.116.20) by warrior.services.quay.plus.net with SMTP; 12 Nov 2003 19:33:43 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AK0jU-0006mg-HO for rsgb_lf_group-outgoing@blacksheep.org; Wed, 12 Nov 2003 19:32:52 +0000 Received: from [147.197.200.9] (helo=hestia.herts.ac.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1AK0jT-0006mX-5q for rsgb_lf_group@blacksheep.org; Wed, 12 Nov 2003 19:32:51 +0000 X-Fake-Domain: gemini Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 1AK0ig-0000Fr-00 for rsgb_lf_group@blacksheep.org; Wed, 12 Nov 2003 19:32:02 +0000 X-No-DNS-For: 147.197.232.252 Received: from [147.197.232.252] (helo=rsch15) by gemini.herts.ac.uk with esmtp (Exim 3.33 #1) id 1AK0if-00034r-00 for rsgb_lf_group@blacksheep.org; Wed, 12 Nov 2003 19:32:01 +0000 From: "James Moritz" To: rsgb_lf_group@blacksheep.org Date: Wed, 12 Nov 2003 19:31:54 -0000 Organization: University of Hertfordshire X-Bad-Message-ID: no DNS (rsch15) Message-ID: <000001c3a953$a60c75c0$fce8c593@rsch15> MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2627 Importance: Normal In-reply-to: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-UH-MailScanner: No Virus detected Subject: RE: LF: Dummy-Load on LW Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 3 >which raises the question I have often wondered about. > When I started in ham radio all coax was post-war surplus 75 ohm. I >assumed >in my youth it was to match a free-space dipole !. > >When I came back to radio after a thirty-year absence in 1990 all was 50 >ohm. > >Who, when and why did someone decide to change to 50 ohm ?? Dear Bryan, LF Group, We had this discussion before on the LF group - In summary, due to the 138log b/a relationship for characteristic impedance, coax cables with Zo much less than 25ohm are not practical due to the small spacings required between conductors, while much larger than 100ohm is difficult due to the very thin centre conductor required. A 75ohm air-spaced copper conductor coax theoretically has lower loss than any other impedance, while 50ohm has higher power-handling ability. If the 75ohm air line is filled with polythene insulation, you come out with something near 50ohm, which will then come out with the lowest loss for a solid cable, assuming the conductor losses dominate, which they usually do. So practically, coax cables always come out somewhere in this fairly narrow range - whether it is 50, 60 or 75ohms is mostly down to preference. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8394 invoked from network); 8 Nov 2003 16:27:51 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 8 Nov 2003 16:27:51 -0000 Received: (qmail 18393 invoked from network); 8 Nov 2003 16:27:51 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 8 Nov 2003 16:27:45 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AIVts-0003Tu-0r for rsgb_lf_group-outgoing@blacksheep.org; Sat, 08 Nov 2003 16:25:24 +0000 Received: from [194.73.73.147] (helo=einsteinium.btinternet.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AIVtr-0003Tl-DG for rsgb_lf_group@blacksheep.org; Sat, 08 Nov 2003 16:25:23 +0000 Received: from host213-122-151-60.in-addr.btopenworld.com ([213.122.151.60] helo=rogersservices) by einsteinium.btinternet.com with esmtp (Exim 3.22 #23) id 1AIVtq-0006ka-00 for rsgb_lf_group@blacksheep.org; Sat, 08 Nov 2003 16:25:23 +0000 X-Bad-Message-ID: no DNS (rogersservices) Message-ID: <000d01c3a614$79cf6ea0$3c977ad5@rogersservices> From: "James Moritz" To: rsgb_lf_group@blacksheep.org References: <001501c3a582$a0578e50$ee9bfea9@oben> Date: Sat, 8 Nov 2003 16:22:14 -0000 MIME-Version: 1.0 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 Subject: LF: Re: RU6LA Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Dear LF Group, I had good copy of RU6LA here overnight, with about 30dB SNR in 0.04Hz BW - It would have been audible if it were not for the sidebands of SXV. Also, VO1NA was visible around 0600 this morning, allthough not much above the noise floor. Joe's sigs have been visible for an hour or 2 most mornings here, but around 10 - 15dB weaker, since the recent flare activity. For some reason, the present conditions seem to provide propagation to VO only around dawn here. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22749 invoked from network); 7 Nov 2003 12:43:24 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 7 Nov 2003 12:43:24 -0000 Received: (qmail 18157 invoked from network); 7 Nov 2003 12:43:24 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 7 Nov 2003 12:43:12 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AI5v4-0006XT-RP for rsgb_lf_group-outgoing@blacksheep.org; Fri, 07 Nov 2003 12:40:54 +0000 Received: from [147.197.200.9] (helo=hestia.herts.ac.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1AI5v1-0006XK-5e for rsgb_lf_group@blacksheep.org; Fri, 07 Nov 2003 12:40:51 +0000 X-Fake-Domain: gemini Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 1AI5k4-0005Nk-00 for rsgb_lf_group@blacksheep.org; Fri, 07 Nov 2003 12:29:32 +0000 X-No-DNS-For: 147.197.232.252 Received: from [147.197.232.252] (helo=rsch15) by gemini.herts.ac.uk with esmtp (Exim 3.33 #1) id 1AI5iY-0002Mb-00 for rsgb_lf_group@blacksheep.org; Fri, 07 Nov 2003 12:27:58 +0000 From: "James Moritz" To: rsgb_lf_group@blacksheep.org Date: Fri, 7 Nov 2003 12:27:58 -0000 Organization: University of Hertfordshire X-Bad-Message-ID: no DNS (rsch15) Message-ID: <000001c3a52a$93ce5bd0$fce8c593@rsch15> MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2627 Importance: Normal In-reply-to: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-UH-MailScanner: No Virus detected Subject: LF: RE: On Air Testing Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Whilst on the subject of dummy loads, are Metal Oxide resistors suitable for dummy loads ? because much higher ratings (5 watts) are available for same physical size as the 2 watt carbon film resistors in my home brew dummy load. 73 Gary - G4WGT Dear Gary, LF Group, The metal oxide types would be fine, as are metal film, etc. In fact, even some types of wirewound resistors are reasonably non-reactive at 136kHz. Several people have resorted to electric heating elements like toasters and fan heaters to make satisfactory LF dummy loads. But obviously, it is a safer bet to stick to known low inductance types like carbon, metal oxide and metal film unless you have the equipment to evaluate the actual RF impedance. The Vishay RCH50 50W film resistors sold by RS components are pretty good value at about 2-3 pounds each, and work OK up to HF - but obviously you need a hefty heatsink as well as the resistors. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13054 invoked from network); 5 Nov 2003 00:15:25 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 5 Nov 2003 00:15:25 -0000 Received: (qmail 7164 invoked from network); 5 Nov 2003 00:15:25 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 5 Nov 2003 00:15:20 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AHBAd-00061l-D7 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 05 Nov 2003 00:05:11 +0000 Received: from [194.73.73.93] (helo=rhenium.btinternet.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AHBAd-00061c-0Q for rsgb_lf_group@blacksheep.org; Wed, 05 Nov 2003 00:05:11 +0000 Received: from host213-122-43-35.in-addr.btopenworld.com ([213.122.43.35] helo=rogersservices) by rhenium.btinternet.com with esmtp (Exim 3.22 #23) id 1AHBAT-0002Va-00 for rsgb_lf_group@blacksheep.org; Wed, 05 Nov 2003 00:05:07 +0000 X-Bad-Message-ID: no DNS (rogersservices) Message-ID: <002a01c3a330$0aaa5a80$232b7ad5@rogersservices> From: "James Moritz" To: rsgb_lf_group@blacksheep.org References: <000001c39fd6$baebd020$fce8c593@rsch15> Date: Wed, 5 Nov 2003 00:01:15 -0000 MIME-Version: 1.0 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 Subject: LF: RE: Solar Activity Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Dear LF Group, I see there were a further 3 X-class flares over Sunday night/Monday morning - not surprising that conditions seem depressed, with low levels of signal and noise. No transatlantic signals seen over the weekend here, but VO1NA did pop up out of the noise for about 1 hour this morning (4th Nov) around 0600 for an hour or so. I see there has just been another big flare that seems to have pegged the satellite's detectors at X17+ - should be good for aurora enthusiasts! Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 10106 invoked from network); 25 Nov 2003 10:00:34 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 25 Nov 2003 10:00:34 -0000 Received: (qmail 7080 invoked from network); 25 Nov 2003 10:00:34 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-Priority: 3 X-MSMail-Priority: Normal Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 25 Nov 2003 10:00:22 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOZy8-0004bQ-KQ for rsgb_lf_group-outgoing@blacksheep.org; Tue, 25 Nov 2003 09:58:52 +0000 Received: from [193.212.240.200] (helo=scan.telenor.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AOZy7-0004Xo-RP for rsgb_lf_group@blacksheep.org; Tue, 25 Nov 2003 09:58:51 +0000 X-Fake-Domain: tns-fbu-22-209.corp.telenor.no Received: from tns-fbu-22-209.corp.telenor.no ([134.47.162.190] [134.47.162.190]) by scan.telenor.net with ESMTP for rsgb_lf_group@blacksheep.org; Tue, 25 Nov 2003 10:58:20 +0100 X-Fake-Domain: tns-fbu-22-213.corp.telenor.no Received: from tns-fbu-22-213.corp.telenor.no ([134.47.162.191]) by tns-fbu-22-209.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.5329); Tue, 25 Nov 2003 10:58:20 +0100 X-Fake-Domain: TNS-FBU-2E-003.corp.telenor.no Received: from TNS-FBU-2E-003.corp.telenor.no ([134.47.164.101]) by tns-fbu-22-213.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.5329); Tue, 25 Nov 2003 10:58:20 +0100 content-class: urn:content-classes:message X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Date: Tue, 25 Nov 2003 10:58:20 +0100 X-Bad-Message-ID: no DNS (TNS-FBU-2E-003.corp.telenor.no) Message-ID: <2D280BB697C7EE4C979C5C89925418EF0181DBF7@TNS-FBU-2E-003.corp.telenor.no> Thread-Topic: LF: Start rsgb_lf_group? Thread-Index: AcOywS8YMbqZt8KaSB6OAmn/hLo0nQAeP9Sg From: jan-martin.noding@telenor.com To: rsgb_lf_group@blacksheep.org X-OriginalArrivalTime: 25 Nov 2003 09:58:20.0616 (UTC) FILETIME=[A8188480:01C3B33A] MIME-Version: 1.0 Subject: RE: LF: Start rsgb_lf_group? 160-190kHz QRP transmitters in America (Intern) Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 ...as far as I remember the main use was sort of "Baby-sitters", but American electronic magazines published such more than 50 years ago, some used the mains wiring as "antenna" 73 LA8AK -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of WarmSpgs@aol.com Sent: 24. november 2003 20:10 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Start rsgb_lf_group? In a message dated 11/24/03 10:44:48 AM Eastern Standard Time, ed@dx.ru writes: > When in USA have permitted beacons 1w and a 15 meter antenna under FCC > part 15 (160-190kHz)? This happened about 50 years ago, although I do not remember the precise year. John From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5517 invoked from network); 24 Nov 2003 15:52:19 -0000 Received: from unknown (HELO netmail01.services.quay.plus.net) (212.159.14.219) by mailstore with SMTP; 24 Nov 2003 15:52:19 -0000 Received: (qmail 20178 invoked by uid 10001); 24 Nov 2003 15:52:18 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-Priority: 3 X-MSMail-Priority: Normal Received: from post.thorcom.com (193.82.116.20) by netmail01.services.quay.plus.net with SMTP; 24 Nov 2003 15:51:46 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOIzS-0004w6-9n for rsgb_lf_group-outgoing@blacksheep.org; Mon, 24 Nov 2003 15:51:06 +0000 Received: from [193.212.240.200] (helo=scan.telenor.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AOIzR-0004vh-Pu for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 15:51:05 +0000 X-Fake-Domain: tns-fbu-22-209.corp.telenor.no Received: from tns-fbu-22-209.corp.telenor.no ([134.47.162.190] [134.47.162.190]) by scan.telenor.net with ESMTP for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 16:50:34 +0100 X-Fake-Domain: tns-fbu-22-212.corp.telenor.no Received: from tns-fbu-22-212.corp.telenor.no ([134.47.162.91]) by tns-fbu-22-209.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.5329); Mon, 24 Nov 2003 16:50:34 +0100 X-Fake-Domain: TNS-FBU-2E-003.corp.telenor.no Received: from TNS-FBU-2E-003.corp.telenor.no ([134.47.164.101]) by tns-fbu-22-212.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.5329); Mon, 24 Nov 2003 16:50:34 +0100 content-class: urn:content-classes:message X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Date: Mon, 24 Nov 2003 16:50:33 +0100 X-Bad-Message-ID: no DNS (TNS-FBU-2E-003.corp.telenor.no) Message-ID: <2D280BB697C7EE4C979C5C89925418EF0181DBF1@TNS-FBU-2E-003.corp.telenor.no> Thread-Topic: LF: PA0SE Field Srength Meter for 137 kHz Thread-Index: AcOympj+A65IqRCqSKGAqw1T6oyg2QAB2G5Q From: jan-martin.noding@telenor.com To: rsgb_lf_group@blacksheep.org X-OriginalArrivalTime: 24 Nov 2003 15:50:34.0252 (UTC) FILETIME=[B24FB4C0:01C3B2A2] MIME-Version: 1.0 Subject: RE: LF: PA0SE Field Srength Meter for 137 kHz Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 carefully reading should show a difference and the correct expression is P = 0.0111(E * d)^2 or is it still wrong for Eudora (the difference is the sign for exponent) 73 LA8AK -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of Eric KD5UWL Sent: 24. november 2003 15:44 To: LF-Group Subject: Re: LF: PA0SE Field Srength Meter for 137 kHz On Mon, 24 Nov 2003, Dick Rollema wrote: > produces a certain field strength is wrongly given as > P = 0.0111(E * d)^2. > > The correct formula is: > > P = 0.0111(E *d)2 in which: Hi, Dick, Sorry -- I don't see the difference. Did you include the wrong one? 73 Eric From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9027 invoked from network); 24 Nov 2003 12:38:40 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 24 Nov 2003 12:38:40 -0000 Received: (qmail 9405 invoked from network); 24 Nov 2003 12:38:40 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-Priority: 3 X-MSMail-Priority: Normal Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 24 Nov 2003 12:38:34 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOFxB-0001fB-Qn for rsgb_lf_group-outgoing@blacksheep.org; Mon, 24 Nov 2003 12:36:33 +0000 Received: from [193.212.240.200] (helo=scan.telenor.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AOFxB-0001f0-3i for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 12:36:33 +0000 X-Fake-Domain: tns-fbu-22-208.corp.telenor.no Received: from tns-fbu-22-208.corp.telenor.no ([134.47.162.90] [134.47.162.90]) by scan.telenor.net with ESMTP for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 13:36:01 +0100 X-Fake-Domain: tns-fbu-22-212.corp.telenor.no Received: from tns-fbu-22-212.corp.telenor.no ([134.47.162.91]) by tns-fbu-22-208.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.5329); Mon, 24 Nov 2003 13:36:00 +0100 X-Fake-Domain: TNS-FBU-2E-003.corp.telenor.no Received: from TNS-FBU-2E-003.corp.telenor.no ([134.47.164.101]) by tns-fbu-22-212.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.5329); Mon, 24 Nov 2003 13:36:00 +0100 content-class: urn:content-classes:message X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Date: Mon, 24 Nov 2003 13:35:59 +0100 X-Bad-Message-ID: no DNS (TNS-FBU-2E-003.corp.telenor.no) Message-ID: <2D280BB697C7EE4C979C5C89925418EF0181DBEC@TNS-FBU-2E-003.corp.telenor.no> Thread-Topic: OFF TOPIC but radio. Thread-Index: AcOuthPS3KG5obWKTPOE/QB4Js90fQD0LrUg From: jan-martin.noding@telenor.com To: rsgb_lf_group@blacksheep.org X-OriginalArrivalTime: 24 Nov 2003 12:36:00.0044 (UTC) FILETIME=[83F0EEC0:01C3B287] MIME-Version: 1.0 Subject: LF: RE: OFF TOPIC but radio. - TX sidetone level adjustment (in RX loadspeaker) Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Usually at FET would solve it, with a series resistor to adjust the sidetone level, and possibly a capacitor if it is a dc level from ground. It is many switch type FETs, those I know and have in my store are 2N7006, VN2408, VN2410, VN2222 Yaesu would probably have used a bipolar device, with questionable effect, particularly in such old transceivers as my FT-902 73 Jan-Martin --- J M Nøding, Datakvalitet, TTS, Kristiansand http://tts.telenor.no/orginfo.html?filterstructureid=13&parent=86&treetopid=86 Telefon 0047-380-52660, 9077-7126 (QTH: 0047-380-87178) -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of captbrian Sent: 19. november 2003 16:44 To: rsgb_lf_group@blacksheep.org Subject: LF: OFF TOPIC but radio. Does anyone know how to lower the volume of the cw side-tone on a IC706Mk2G ? If I turn down the volume control I need to turn it back up again to hear the incoming signal each over. This gets tedious and wakes the neighbours when I start sending without reducing audio gain .Also may bring MI5 round at 2.00 am with current security jitters. G3GVB -----Original Message----- From: G0MRF@aol.com To: rsgb_lf_group@blacksheep.org Date: 19 November 2003 14:22 Subject: Re: LF: CT1/G3KEV >In a message dated 11/18/03 8:02:22 PM GMT Standard Time, >g3kev.ham@virgin.net writes: > >> Airport security at LEEDS very thorough, when my equipment passed the xray >> machine all the lights and buzzers went off because of one dangerous looking >> item. I had to unpack one bag and the suspect item was my MORSE key. They had >> not encountered one of these devices before. One the way back at FARO >> airport the security xray light up just the same flashing lights etc but the man >> just waved me on, he obviously knows all about amateur radio and morse keys >> !!!!!!!!!!!!! >> >> 73 de Mal/G3KEV >> >> > >Nice to work you on voice on 80m for the first time Mal. > >FB on the security. I find that the X-ray machines hate the solid metal base >of some morse keys. Apparently the density of block of Semtex has a similar >effect on the image displayed on the security monitors. > >73 > >David > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 512 invoked from network); 24 Nov 2003 12:24:25 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 24 Nov 2003 12:24:25 -0000 Received: (qmail 24715 invoked by uid 10001); 24 Nov 2003 12:24:24 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-Priority: 3 X-MSMail-Priority: Normal Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 24 Nov 2003 12:23:28 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOFjV-0001RX-PU for rsgb_lf_group-outgoing@blacksheep.org; Mon, 24 Nov 2003 12:22:25 +0000 Received: from [193.212.240.200] (helo=scan.telenor.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AOFjV-0001Ix-62 for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 12:22:25 +0000 X-Fake-Domain: tns-fbu-22-209.corp.telenor.no Received: from tns-fbu-22-209.corp.telenor.no ([134.47.162.190] [134.47.162.190]) by scan.telenor.net with ESMTP for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 13:21:52 +0100 X-Fake-Domain: tns-fbu-22-212.corp.telenor.no Received: from tns-fbu-22-212.corp.telenor.no ([134.47.162.91]) by tns-fbu-22-209.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.5329); Mon, 24 Nov 2003 13:21:52 +0100 X-Fake-Domain: TNS-FBU-2E-003.corp.telenor.no Received: from TNS-FBU-2E-003.corp.telenor.no ([134.47.164.101]) by tns-fbu-22-212.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.5329); Mon, 24 Nov 2003 13:21:52 +0100 content-class: urn:content-classes:message X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Date: Mon, 24 Nov 2003 13:21:52 +0100 X-Bad-Message-ID: no DNS (TNS-FBU-2E-003.corp.telenor.no) Message-ID: <2D280BB697C7EE4C979C5C89925418EF0181DBEA@TNS-FBU-2E-003.corp.telenor.no> Thread-Topic: JASON anyone ? Thread-Index: AcOx+LHA8wS1xtEPRo6YDjvh40mNmQAi+Tsg From: jan-martin.noding@telenor.com To: rsgb_lf_group@blacksheep.org X-OriginalArrivalTime: 24 Nov 2003 12:21:52.0340 (UTC) FILETIME=[8AAB9140:01C3B285] MIME-Version: 1.0 Subject: LF: Tuning LF inductors and inexpensive 10000pF variable capacitors Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=1.0 required=5.0 tests=HTML_40_50,HTML_FONTCOLOR_BLUE,HTML_FONT_BIG,HTML_MESSAGE,NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Content-transfer-encoding: 8bit
Hi
 
somewhat puzzled that it hasn't been any discussions about the technique mentioned by G3VA Pat in last Radcom (11/2003). Suppose all of you subscribes to Radcom, but I've noted some from his note on http://home.online.no/~la8ak/c97.htm  Although the notes refers to results made for HF, comparative experiments could be made for LF.
it was also mentioned (not shown on my page) a "high voltage" variable capacitor ...up to 1500pF, suppose it could solve some problems even for LF, and stacking more such devices could easily make a lowcost 10nF variable capacitor
 
73 Jan-Martin, LA8AK

---
J M Nøding, Datakvalitet, TTS, Kristiansand

From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3762 invoked from network); 21 Nov 2003 16:48:46 -0000 Received: from unknown (HELO murphys.services.quay.plus.net) (212.159.14.225) by mailstore with SMTP; 21 Nov 2003 16:48:46 -0000 Received: (qmail 28225 invoked from network); 21 Nov 2003 16:48:35 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-Priority: 3 X-MSMail-Priority: Normal Received: from post.thorcom.com (193.82.116.20) by murphys.services.quay.plus.net with SMTP; 21 Nov 2003 16:48:22 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ANERQ-0002Cd-H0 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 21 Nov 2003 16:47:32 +0000 Received: from [193.212.240.200] (helo=virus-out-st.online.no) by post.thorcom.com with esmtp (Exim 4.14) id 1ANERP-0002CI-Sy for rsgb_lf_group@blacksheep.org; Fri, 21 Nov 2003 16:47:31 +0000 X-Fake-Domain: tns-fbu-22-208.corp.telenor.no Received: from tns-fbu-22-208.corp.telenor.no ([134.47.162.90] [134.47.162.90]) by scan.telenor.net with ESMTP for rsgb_lf_group@blacksheep.org; Fri, 21 Nov 2003 17:46:53 +0100 X-Fake-Domain: tns-fbu-22-213.corp.telenor.no Received: from tns-fbu-22-213.corp.telenor.no ([134.47.162.191]) by tns-fbu-22-208.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.5329); Fri, 21 Nov 2003 17:46:53 +0100 X-Fake-Domain: TNS-FBU-2E-003.corp.telenor.no Received: from TNS-FBU-2E-003.corp.telenor.no ([134.47.164.101]) by tns-fbu-22-213.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.5329); Fri, 21 Nov 2003 17:46:53 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 content-class: urn:content-classes:message Date: Fri, 21 Nov 2003 17:46:53 +0100 X-Bad-Message-ID: no DNS (TNS-FBU-2E-003.corp.telenor.no) Message-ID: <2D280BB697C7EE4C979C5C89925418EF0181DBE8@TNS-FBU-2E-003.corp.telenor.no> Thread-Topic: LF: Dummy-Load on LW Thread-Index: AcOosuWPmdhZa9GJSS6d3fjVq49UngHm+OwA From: jan-martin.noding@telenor.com To: rsgb_lf_group@blacksheep.org X-OriginalArrivalTime: 21 Nov 2003 16:46:53.0471 (UTC) FILETIME=[113E5AF0:01C3B04F] MIME-Version: 1.0 Subject: RE: LF: Dummy-Load on LW (Intern) Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 >By the way, a lot of russian Surplus HF equipment which became available in Germany after >the breakdown of the iron curtain, even automatic antenna tuners, were designed for 75 ohms impedance. and I discovered that the German Torn.Fu-b1 transmitter worked most efficient into 50 ohm load 73 LA8AK --- J M Nøding, Datakvalitet, TTS, Kristiansand Telefon 0047-380-52660, 9077-7126 (QTH: 0047-380-87178) -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of Hans-Joachim Brandt Sent: 12. november 2003 00:45 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Dummy-Load on LW By the way, a lot of russian Surplus HF equipment which became available in Germany after the breakdown of the iron curtain, even automatic antenna tuners, were designed for 75 ohms impedance. 73 Ha-Jo, DJ1ZB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2543 invoked from network); 11 Nov 2003 12:25:26 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 11 Nov 2003 12:25:26 -0000 Received: (qmail 27005 invoked by uid 10001); 11 Nov 2003 12:25:25 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-Fake-Domain: unknown X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 11 Nov 2003 12:23:45 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AJXWr-0004ri-6T for rsgb_lf_group-outgoing@blacksheep.org; Tue, 11 Nov 2003 12:21:53 +0000 Received: from [193.212.240.200] (helo=scan.telenor.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AJXWo-0004rZ-Ff for rsgb_lf_group@blacksheep.org; Tue, 11 Nov 2003 12:21:50 +0000 X-Fake-Domain: tns-fbu-22-209.corp.telenor.no Received: from tns-fbu-22-209.corp.telenor.no ([134.47.162.190] [134.47.162.190]) by scan.telenor.net with ESMTP for rsgb_lf_group@blacksheep.org; Tue, 11 Nov 2003 13:21:13 +0100 X-Fake-Domain: tns-fbu-22-213.corp.telenor.no Received: from tns-fbu-22-213.corp.telenor.no ([134.47.162.191]) by tns-fbu-22-209.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.5329); Tue, 11 Nov 2003 13:21:13 +0100 X-Fake-Domain: TNS-FBU-2E-003.corp.telenor.no Received: from TNS-FBU-2E-003.corp.telenor.no ([134.47.164.201]) by tns-fbu-22-213.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.5329); Tue, 11 Nov 2003 13:21:13 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 content-class: urn:content-classes:message Date: Tue, 11 Nov 2003 13:21:13 +0100 X-Bad-Message-ID: no DNS (TNS-FBU-2E-003.corp.telenor.no) Message-ID: <2D280BB697C7EE4C979C5C89925418EF0181DBD0@TNS-FBU-2E-003.corp.telenor.no> Thread-Topic: Topband Thread-Index: AcOoTEAz4z1Bj2qsT9eEAZK9O0jYzgAAUFFg From: jan-martin.noding@telenor.com To: rsgb_lf_group@blacksheep.org X-OriginalArrivalTime: 11 Nov 2003 12:21:13.0538 (UTC) FILETIME=[4C2C1A20:01C3A84E] MIME-Version: 1.0 Subject: LF: RE: Topband restrictions Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=1.0 required=5.0 tests=HTML_20_30,HTML_FONTCOLOR_BLUE,HTML_FONT_BIG,HTML_MESSAGE,NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 3 Content-transfer-encoding: 8bit
Dick,
your email address isn't visible here, so I'll have to reply via the reflector
Believe it was some restrictions when I lived there, and earlier - as G3OOQ told me, could check the '74 callbook if somebody else don't give the proper info
we also had some 10W (?) restrictions when we were first allowed to operate 160m from Norway in 1977
 
73, Jan-Martin

---
J-M Noeding, Data quality, Telenor Networks, N4600-Kristiansand
http://home.online.no/~la8ak/
Telefon 0047-380-52660, 9077-7126 (QTH: 0047-380-87178)

-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of Dick Rollema
Sent: 11. november 2003 12:57
To: LF-Group
Subject: LF: Topband

To All from PA0SE,

Sorry  to use  the reflector for a non-lf topic but in this way I can reach many amateurs in the UK that can possibly help me with some info I require.

I am presently writing an article on the 160m band for our VERON magazine Electron.  This band is not as popular here as it was and still is in the UK. The reason is no doubt that only in 1962 we got a small segment, 1825 - 1835kHz, with a maximum allowed power of 10 W.

I found out that in the UK before World War II the band  available to amateurs was 1715 - 2000kHz.  In 1953 this was changed to 1800 - 2000 kHz.

My questions are:

1. Were there any power restrictions in the past and present?

2. Is the band still 1800 - 2000kHz?

Any additional info of interest is also appreciated.

There must be old timers around that  can help me and I thank them in advance.

73, Dick, PA0SE
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19225 invoked from network); 8 Nov 2003 00:25:04 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 8 Nov 2003 00:25:04 -0000 Received: (qmail 13680 invoked from network); 8 Nov 2003 00:25:04 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 8 Nov 2003 00:24:57 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AIGsu-0007uc-0v for rsgb_lf_group-outgoing@blacksheep.org; Sat, 08 Nov 2003 00:23:24 +0000 Received: from [194.25.134.18] (helo=mailout04.sul.t-online.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AIGss-0007tW-Rh for rsgb_lf_group@blacksheep.org; Sat, 08 Nov 2003 00:23:22 +0000 X-Fake-Domain: fwd11.aul.t-online.de Received: from fwd11.aul.t-online.de by mailout04.sul.t-online.com with smtp id 1AIGss-0006Yx-00; Sat, 08 Nov 2003 01:23:22 +0100 X-Fake-Domain: (XRg1T6ZCYenD1-gbIgagl7tyeec-4qPJpBpdHsDYIn3dNbQLo7zQ8l@[62.224.53.37]) Received: from (XRg1T6ZCYenD1-gbIgagl7tyeec-4qPJpBpdHsDYIn3dNbQLo7zQ8l@[62.224.53.37]) by fwd11.sul.t-online.com with smtp id 1AIGsb-1JtH1c0; Sat, 8 Nov 2003 01:23:05 +0100 From: "jannsen" <0482183881-0001@t-online.de> To: rsgb_lf_group@blacksheep.org References: <000001c3a52a$93ce5bd0$fce8c593@rsch15> X-Mailer: T-Online eMail 2.34 MIME-Version: 1.0 Date: Sat, 8 Nov 2003 01:23:05 +0100 Message-ID: <1AIGsb-1JtH1c0@fwd11.sul.t-online.com> X-Seen: false X-ID: XRg1T6ZCYenD1-gbIgagl7tyeec-4qPJpBpdHsDYIn3dNbQLo7zQ8l Subject: Re: LF: On Air Testing Content-Type: multipart/mixed; boundary="------------040302040902030606030501" X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.4 required=5.0 tests=FROM_ENDS_IN_NUMS,FROM_STARTS_WITH_NUMS autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 This is a multi-part message in MIME format. --------------040302040902030606030501 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit James Moritz schrieb: ............... > Several people have resorted to electric heating elements like > toasters and fan heaters to make satisfactory LF dummy loads. Hi Jim es all, here are two dummy loads in use; one is a bulb 110V/DC500W, Z 35 Ohm on 136kHz (bridge measurement) and the other is made of four hollow ceramic resistors 200 Ohm/60W each, makes 200W only. but blowing air through the resistors (see attachment) makes a lukewarm 300W dummy on 136kHz (0,4uH only). I tried 800W. A peace of paper above the dummy caught fire within 10 sec. regards Uwe/dj8wx --------------040302040902030606030501 Content-Type: image/jpeg; name="FNFDU~1.JPG" Content-Transfer-Encoding: base64 Content-Disposition: inline; filename="FNFDU~1.JPG" /9j/4AAQSkZJRgABAQEBLAEsAAD/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRof Hh0aHBwgJC4nICIsIxwcKDcpLDAxNDQ0Hyc5PTgyPC4zNDL/2wBDAQkJCQwLDBgNDRgyIRwh MjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjL/wAAR CAGsAosDASIAAhEBAxEB/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAA AgEDAwIEAwUFBAQAAAF9AQIDAAQRBRIhMUEGE1FhByJxFDKBkaEII0KxwRVS0fAkM2JyggkK FhcYGRolJicoKSo0NTY3ODk6Q0RFRkdISUpTVFVWV1hZWmNkZWZnaGlqc3R1dnd4eXqDhIWG h4iJipKTlJWWl5iZmqKjpKWmp6ipqrKztLW2t7i5usLDxMXGx8jJytLT1NXW19jZ2uHi4+Tl 5ufo6erx8vP09fb3+Pn6/8QAHwEAAwEBAQEBAQEBAQAAAAAAAAECAwQFBgcICQoL/8QAtREA AgECBAQDBAcFBAQAAQJ3AAECAxEEBSExBhJBUQdhcRMiMoEIFEKRobHBCSMzUvAVYnLRChYk NOEl8RcYGRomJygpKjU2Nzg5OkNERUZHSElKU1RVVldYWVpjZGVmZ2hpanN0dXZ3eHl6goOE 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2jjPWgdKBjwSOPXmpVAIyDUIz14qRVP0pDQk1uJ4mjbgGun8J+Im0DTTZS2/mYzslRsHB9Qa 59FNSAHFS4p7lxk4l7UL9r69kuXABY9BVB260pGKiYcYJqlYTd3dkDk5qAnJqyeh4qIpxnFM jW5qeFf+Rv0U8f8AIQg/9GLX1B2r5g8Krjxfon/X/B/6MWvp/tSZpTFooopGgUUUUAFFFFAB RRRQAUUUUAFFFFABRRRQAUUUUAFFFFABRRRQAUUUUAFFFFABRRRQAUUUUAFFFFABRRRQAUUU UAFFFFABRRRQAUUUUAFFFFABRRRQAUUUUAFFFFACVxXiz4a6V4x1aLUr6+1O3mjgEAW1lRVK hmbJDIecsf0rtaKBNXPM0+CWgx9NY10/WeL/AON1YT4O6In/ADFNYb6yxf8AxuvRKKfMyeSL 6HAj4R6EP+X3Uz9ZI/8A4inf8Km0P/n81L/v5H/8RXeUUXYckexwn/CqNDH/AC96j/38j/8A iKUfCrQx/wAveo/9/E/+IruqKLsPZw7HGv8ADbSJLdYHu78ovT5o/wD4is6b4OeG5zlrnUgf aVP/AIivQ6KLsfLHseaH4IeGyf8Aj+1b/v8AR/8AxugfBDw2P+X7Vv8Av9H/APG69Loouxcs ex5p/wAKQ8M/8/urf9/Y/wD43Qfgj4bIA+3atx/02j/+N16XRRdj5Y9jzQfBHw2DxfauP+20 f/xupF+C3h1el/q3/f2P/wCN16PRRdhyx7HnY+DXh7/n91Q/9tY//iKP+FNeHv8An81T/v7H /wDEV6LRSuHKjzr/AIU34e/5/NU/7+x//EUf8Kb8Pf8AP5qn/f2P/wCIr0Wii4cqPO/+FOeH gc/bNT/7+x//ABFH/CnPD2f+PzVP+/sf/wARXolFAcqPOv8AhTXh7Oftmqf9/Y//AIigfBrw 8P8Al81T/v7H/wDEV6LRQHKjzwfB3w8P+XzU/wDv7H/8RSj4P+Hx/wAvmp/9/Y//AIivQaKB 8qOAHwj0Af8AL3qX/fyP/wCIpx+EugkAfa9S4GP9ZH/8RXe0UBZHA/8ACpNA/wCfvUv+/if/ ABFDfCPQHOTd6l/38j/+IrvqKAsjgP8AhUHh/j/S9S/7+R//ABFN/wCFP6Bgj7ZqeP8ArpH/ APEV6DRQHKjg7H4VaHp+oW19Ddai0tvMkyB5EKllIIzhOnFd5RRQCVhaKKKBhRRRQAUUUUAF FFFABRRRQAUUUUAFFFFABRRRQAUUUUAFFFFABRRRQAUUUUAFFFFAH//Z --------------040302040902030606030501-- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 490 invoked from network); 27 Nov 2003 15:42:25 -0000 Received: from unknown (HELO netmail01.services.quay.plus.net) (212.159.14.219) by mailstore with SMTP; 27 Nov 2003 15:42:25 -0000 Received: (qmail 7011 invoked by uid 10001); 27 Nov 2003 15:42:22 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail01.services.quay.plus.net with SMTP; 27 Nov 2003 15:41:16 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1APOEy-0002CU-BK for rsgb_lf_group-outgoing@blacksheep.org; Thu, 27 Nov 2003 15:39:36 +0000 Received: from [204.127.198.35] (helo=rwcrmhc11.comcast.net) by post.thorcom.com with esmtp (Exim 4.14) id 1APOEx-0002CE-5g for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2003 15:39:35 +0000 X-Fake-Domain: jayterminal Received: from jayterminal (c-67-163-165-144.client.comcast.net[67.163.165.144]) by comcast.net (rwcrmhc11) with SMTP id <2003112715390301300dukjce>; Thu, 27 Nov 2003 15:39:03 +0000 Message-ID: <000b01c3b4fc$dc4e8ec0$6401a8c0@comcast.net> From: "Jay Rusgrove" To: rsgb_lf_group@blacksheep.org References: <000001c3b4f7$5047f240$fce8c593@rsch15> Date: Thu, 27 Nov 2003 10:41:01 -0500 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: Re: LF: Impedancebridge Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Jim & group If your selective level meter has a tracking generator output it can serve as the signal generator (may need to be amplified a bit) as well as the detector. I use an old General Radio 516 bridge (recommended by John Andrews - tnx agn John) and an HP 3586C selective level meter with good success. Makes for an interesting mix of old and new test equipment sitting side by side! Jay Rusgrove, W1VD ----- Original Message ----- From: "James Moritz" To: Sent: Thursday, November 27, 2003 10:01 AM Subject: RE: LF: Impedancebridge > Dear Peter, LF Group, > > >Hello LFers, > >is the Gereral Radio 1656 covering our LF-Band? > > I am not certain, but I believe this is an audio-frequency bridge - if > it does work at 136k, it is probably with reduced specification. > > >May be that any impedance bridge using as RF detector some selective > level > >meter (pegelmesser) can help you for this measure. > > Selective level meters work very nicely as RF bridge detectors - Since > it is only null detection that is needed, a receiver with "S" meter or > output meter would also work fine. All you have to do is make sure there > is enough attenuation between the bridge and RX/level meter so that the > local QRM does not overload the front end. > > Cheers, Jim Moritz > 73 de M0BMU > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 30189 invoked from network); 22 Nov 2003 09:56:13 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by mailstore with SMTP; 22 Nov 2003 09:56:13 -0000 Received: (qmail 24064 invoked from network); 22 Nov 2003 09:56:20 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by warrior.services.quay.plus.net with SMTP; 22 Nov 2003 09:56:11 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ANURh-0008AQ-PM for rsgb_lf_group-outgoing@blacksheep.org; Sat, 22 Nov 2003 09:52:53 +0000 Received: from [130.244.199.129] (helo=fep01-svc.swip.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ANURh-0008AH-27 for rsgb_lf_group@blacksheep.org; Sat, 22 Nov 2003 09:52:53 +0000 X-Fake-Domain: oemcomputer Received: from oemcomputer ([213.101.36.210]) by fep01-svc.swip.net with SMTP id <20031122095251.FUFE1161.fep01-svc.swip.net@oemcomputer> for ; Sat, 22 Nov 2003 10:52:51 +0100 X-Bad-Message-ID: no DNS (oemcomputer) Message-ID: <002601c3b0de$7140b440$d22465d5@oemcomputer> From: "Johan Bodin" To: rsgb_lf_group@blacksheep.org References: <103.39d4f9b8.2cf035eb@aol.com> Date: Sat, 22 Nov 2003 10:52:41 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: Re: LF: Beacons stays on Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 > One boasted, "I can climb in my pickup truck first thing in the morning, > drive and drive all day, and not reach the other side of my spread by nightfall." What a stupid man! I'd suggest changing the course 180 degrees and take the short path :~) 73 Johan SM6LKM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16446 invoked from network); 11 Nov 2003 20:51:04 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 11 Nov 2003 20:51:04 -0000 Received: (qmail 329 invoked from network); 11 Nov 2003 20:51:03 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 11 Nov 2003 20:50:57 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AJfS4-0003dP-PZ for rsgb_lf_group-outgoing@blacksheep.org; Tue, 11 Nov 2003 20:49:28 +0000 Received: from [130.244.199.132] (helo=fep04-svc.swip.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AJfS4-0003dG-1W for rsgb_lf_group@blacksheep.org; Tue, 11 Nov 2003 20:49:28 +0000 X-Fake-Domain: oemcomputer Received: from oemcomputer ([213.101.41.76]) by fep04-svc.swip.net with SMTP id <20031111204924.HPGB23350.fep04-svc.swip.net@oemcomputer> for ; Tue, 11 Nov 2003 21:49:24 +0100 X-Bad-Message-ID: no DNS (oemcomputer) Message-ID: <01ce01c3a895$53649500$ac2465d5@oemcomputer> From: "Johan Bodin" To: rsgb_lf_group@blacksheep.org References: <19d.1ca91b53.2cdcf1ce@aol.com> Date: Tue, 11 Nov 2003 21:49:07 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: Re: Dummy loads at LF Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Dear group, at a wavelength of 2200m I can't see any reason why a bucket of salt water can't be used as a "poor man's dummy load". Also, water needs a lot of energy to heat up. At 4.18 kJ/(kg*K) a 10 liter bucket will take a kWh, or so, before reaching the boiling point... :-) By the way, the speed (frequency) control system at SAQ contains servo controlled "liquid rheostats". Any ideas for electrode material? 73 Johan SM6LKM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20584 invoked from network); 13 Nov 2003 16:55:38 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 13 Nov 2003 16:55:38 -0000 Received: (qmail 4759 invoked from network); 13 Nov 2003 16:55:38 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 13 Nov 2003 16:55:31 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AKKjw-0003SR-Po for rsgb_lf_group-outgoing@blacksheep.org; Thu, 13 Nov 2003 16:54:40 +0000 Received: from [194.247.47.231] (helo=mailout.zetnet.co.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1AKKjw-0003SH-4l for rsgb_lf_group@blacksheep.org; Thu, 13 Nov 2003 16:54:40 +0000 Received: from irwell.zetnet.co.uk ([194.247.47.48] helo=zetnet.co.uk) by mailout.zetnet.co.uk with esmtp (Exim 3.36 #1 (Debian)) id 1AKKjv-0005TE-00 for ; Thu, 13 Nov 2003 16:54:39 +0000 X-Fake-Domain: johnb5a82ea1a4 Received: from johnb5a82ea1a4 (bts-0415.dialup.zetnet.co.uk [194.247.49.159]) by zetnet.co.uk (8.12.3/8.12.3/Debian-6.6.zet1) with ESMTP id hADGsP6w007506 for ; Thu, 13 Nov 2003 16:54:30 GMT X-Bad-Message-ID: no DNS (johnb5a82ea1a4) Message-ID: <00ee01c3aa06$dae62f30$9f31f7c2@johnb5a82ea1a4> From: "John Rabson" To: rsgb_lf_group@blacksheep.org Date: Thu, 13 Nov 2003 16:54:14 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: [not completely off topic] Tunnel Communications and Talk Back Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 I'm looking for 23cm portable gear for experiments in a disused railway tunnel. Is there any sort of microwave e-mailing list which I could usefully post to? Regards, John Rabson G3PAI Cave Radio and Electronics Group British Cave Research Association Tel: +44 (0)1394 460 298 Fax: +44 (0)1394 420 795 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 8529 invoked from network); 11 Nov 2003 21:26:41 -0000 Received: from unknown (HELO murphys.services.quay.plus.net) (212.159.14.225) by mailstore with SMTP; 11 Nov 2003 21:26:41 -0000 Received: (qmail 18519 invoked from network); 11 Nov 2003 21:26:32 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by murphys.services.quay.plus.net with SMTP; 11 Nov 2003 21:26:18 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AJg1H-0004Nw-Un for rsgb_lf_group-outgoing@blacksheep.org; Tue, 11 Nov 2003 21:25:51 +0000 Received: from [194.247.47.231] (helo=mailout.zetnet.co.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1AJg1H-0004Nn-FQ for rsgb_lf_group@blacksheep.org; Tue, 11 Nov 2003 21:25:51 +0000 Received: from irwell.zetnet.co.uk ([194.247.47.48] helo=zetnet.co.uk) by mailout.zetnet.co.uk with esmtp (Exim 3.36 #1 (Debian)) id 1AJg1H-0008F7-00 for ; Tue, 11 Nov 2003 21:25:51 +0000 X-Fake-Domain: johnb5a82ea1a4 Received: from johnb5a82ea1a4 (bts-0695.dialup.zetnet.co.uk [194.247.50.183]) by zetnet.co.uk (8.12.3/8.12.3/Debian-6.6.zet1) with ESMTP id hABLPmTO002501 for ; Tue, 11 Nov 2003 21:25:49 GMT X-Bad-Message-ID: no DNS (johnb5a82ea1a4) Message-ID: <003a01c3a89a$6d0fd550$b732f7c2@johnb5a82ea1a4> From: "John Rabson" To: rsgb_lf_group@blacksheep.org References: <19d.1ca91b53.2cdcf1ce@aol.com> <01ce01c3a895$53649500$ac2465d5@oemcomputer> <3FB150A2.1020407@virgin.net> Date: Tue, 11 Nov 2003 21:26:01 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: Re: LF: Re: Dummy loads at LF Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 About 30 years ago, Ongar Radio station to the north-east of London had a number of nine kilowatt HF ISB transmitters. For dummy loads they used carbon tubes about a foot long and an inch or two in diameter. Resistance was 75 ohms and they were cooled by pumping water through them. I had a box of such resistors, but they went missing in a house move. 73 John Rabson G3PAI ----- Original Message ----- From: "Stewart Bryant" To: Sent: Tuesday, November 11, 2003 9:12 PM Subject: Re: LF: Re: Dummy loads at LF > When I was a PhD student we used to make high power resistors > to terminate very large pulse generators from PVC tube filled > with copper sulphate and with brass end plugs. By varying the > size of the resistor and the concentration of the copper sulphate > we could get the value we wanted. I can't remember how powerful > these generators were (not my project), but they ranged > from the size of a small van to a very large lorry :) > > Interestingly the high frequency performance of these resistors > was not a problem. > > A quick check on Google pointed me to this design info: > > http://www.kronjaeger.com/hv/hv/comp/res/ > (It's actually interesting to also look at the top level page) > > http://www.samtech.co.uk/PDF%20files/liquid%20res.pdf > > 73 > > Stewart > > Johan Bodin wrote: > > Dear group, > > > > at a wavelength of 2200m I can't see any reason why a bucket of > > salt water can't be used as a "poor man's dummy load". Also, > > water needs a lot of energy to heat up. At 4.18 kJ/(kg*K) a 10 liter > > bucket will take a kWh, or so, before reaching the boiling point... :-) > > > > By the way, the speed (frequency) control system at SAQ contains > > servo controlled "liquid rheostats". > > > > Any ideas for electrode material? > > > > 73 > > > > Johan SM6LKM > > > > > > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 16438 invoked from network); 11 Nov 2003 15:09:23 -0000 Received: from unknown (HELO netmail01.services.quay.plus.net) (212.159.14.219) by mailstore with SMTP; 11 Nov 2003 15:09:23 -0000 Received: (qmail 1737 invoked by uid 10001); 11 Nov 2003 15:09:21 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail01.services.quay.plus.net with SMTP; 11 Nov 2003 15:08:46 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AJa4B-0007AV-Dh for rsgb_lf_group-outgoing@blacksheep.org; Tue, 11 Nov 2003 15:04:27 +0000 Received: from [194.247.47.231] (helo=mailout.zetnet.co.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1AJa4A-0007AM-QG for rsgb_lf_group@blacksheep.org; Tue, 11 Nov 2003 15:04:26 +0000 Received: from irwell.zetnet.co.uk ([194.247.47.48] helo=zetnet.co.uk) by mailout.zetnet.co.uk with esmtp (Exim 3.36 #1 (Debian)) id 1AJa4A-0007rv-00 for ; Tue, 11 Nov 2003 15:04:26 +0000 X-Fake-Domain: johnb5a82ea1a4 Received: from johnb5a82ea1a4 (bts-0060.dialup.zetnet.co.uk [194.247.48.60]) by zetnet.co.uk (8.12.3/8.12.3/Debian-6.6.zet1) with ESMTP id hABF4Gw5009990 for ; Tue, 11 Nov 2003 15:04:17 GMT X-Bad-Message-ID: no DNS (johnb5a82ea1a4) Message-ID: <000901c3a865$204a4f50$3c30f7c2@johnb5a82ea1a4> From: "John Rabson" To: rsgb_lf_group@blacksheep.org References: <2D280BB697C7EE4C979C5C89925418EF0181DBD0@TNS-FBU-2E-003.corp.telenor.no> Date: Tue, 11 Nov 2003 15:03:50 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: Re: RE: Topband restrictions Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 >From 1961 for some years the maximum permitted power was 10 watts into the PA. Currently, the band limits in the UK are 1.81 and 2 MHz. >From 1.81-1.85 MHz the maximum permitted power is 400 Watts. From 1.85-2 MHz it is 32 Watts. 73 John Rabson G3PAI ----- Original Message ----- From: To: Sent: Tuesday, November 11, 2003 12:21 PM Subject: LF: RE: Topband restrictions Dick, your email address isn't visible here, so I'll have to reply via the reflector Believe it was some restrictions when I lived there, and earlier - as G3OOQ told me, could check the '74 callbook if somebody else don't give the proper info we also had some 10W (?) restrictions when we were first allowed to operate 160m from Norway in 1977 73, Jan-Martin --- J-M Noeding, Data quality, Telenor Networks, N4600-Kristiansand http://home.online.no/~la8ak/ Telefon 0047-380-52660, 9077-7126 (QTH: 0047-380-87178) -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of Dick Rollema Sent: 11. november 2003 12:57 To: LF-Group Subject: LF: Topband To All from PA0SE, Sorry to use the reflector for a non-lf topic but in this way I can reach many amateurs in the UK that can possibly help me with some info I require. and I am presently writing an article on the 160m band for our VERON magazine Electron. This band is not as popular here as it was and still is in the UK. The reason is no doubt that only in 1962 we got a small segment, 1825 - 1835kHz, with a maximum allowed power of 10 W. I found out that in the UK before World War II the band available to amateurs was 1715 - 2000kHz. In 1953 this was changed to 1800 - 2000 kHz. My questions are: 1. Were there any power restrictions in the past and present? 2. Is the band still 1800 - 2000kHz? Any additional info of interest is also appreciated. There must be old timers around that can help me and I thank them in advance. 73, Dick, PA0SE From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 30360 invoked from network); 4 Nov 2003 08:03:21 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 4 Nov 2003 08:03:21 -0000 Received: (qmail 20258 invoked by uid 10001); 4 Nov 2003 08:03:21 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 4 Nov 2003 08:02:55 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AGw8p-000362-DJ for rsgb_lf_group-outgoing@blacksheep.org; Tue, 04 Nov 2003 08:02:19 +0000 Received: from [194.247.47.231] (helo=mailout.zetnet.co.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1AGw8o-00035t-Sq for rsgb_lf_group@blacksheep.org; Tue, 04 Nov 2003 08:02:18 +0000 Received: from irwell.zetnet.co.uk ([194.247.47.48] helo=zetnet.co.uk) by mailout.zetnet.co.uk with esmtp (Exim 3.36 #1 (Debian)) id 1AGw8o-0000ZN-00 for ; Tue, 04 Nov 2003 08:02:18 +0000 X-Fake-Domain: johnb5a82ea1a4 Received: from johnb5a82ea1a4 (bts-0173.dialup.zetnet.co.uk [194.247.48.173]) by zetnet.co.uk (8.12.3/8.12.3/Debian-6.6.zet1) with ESMTP id hA482E63018958 for ; Tue, 4 Nov 2003 08:02:17 GMT X-Bad-Message-ID: no DNS (johnb5a82ea1a4) Message-ID: <000b01c3a2a9$ff8d02f0$ad30f7c2@johnb5a82ea1a4> From: "John Rabson" To: rsgb_lf_group@blacksheep.org Date: Tue, 4 Nov 2003 08:01:30 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: Unusual QRM Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Has Mal been using TUPperware insulators? >From the The Times 4 November 2003. "Randy ram gets the secret world all overexcited By Simon de Bruxelles STAFF at the top secret GCHQ monitoring base were baffled. They had nothing like it before. Was the high-frequency transmission a covert signal from a spy? Or something more sinister? Now the origin of the signal which puzzled British Intelligence can be revealed: an over-excited ram was rubbing himself against a radio mast. The intelligence community's finest moment has been revealed in the Daily Observer, a spoof newspaper for staff at GCHQ in Cheltenham, which employs 4,500 people. The mast in a field in Scarborough, North Yorkshire, was picking up a signal at roughly the same time every day. The paper says: "An investigation was quickly launched, revealing that the signal was across all the high-frequency bands. Stranger still, only Scarborough's aerials could pick it up. Even stranger, it happened only in daytime And to one antenna in particular. Exhaustive tests were launched, revealing the answer - a horny ram. "In between servicing some local ewes, it was partial to rubbing its horns against the aerial masts." A GCHQ spokesman, Bob McNally, said: "It was part of the ritual that the ram went through after it had made a conquest I believe the ram was notching up a mark on the pylon, so to speak." The tabloid paper is a rare glimpse of humour in the normally po-faced world of secret intelligence. GCHQ monitors communciations from around the world, from e-mails to mobile telephone calls, but this was its first message from a randy ram." 73 John Rabson G3PAI From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 18133 invoked from network); 7 Nov 2003 16:26:55 -0000 Received: from netmail00.services.quay.plus.net (212.159.14.218) by mailstore with SMTP; 7 Nov 2003 16:26:55 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 7787 invoked from network); 7 Nov 2003 16:26:53 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 7 Nov 2003 16:26:48 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AI9QE-0001Io-4i for rsgb_lf_group-outgoing@blacksheep.org; Fri, 07 Nov 2003 16:25:18 +0000 Received: from [64.23.85.10] (helo=mail.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AI9QD-0001If-1z for rsgb_lf_group@blacksheep.org; Fri, 07 Nov 2003 16:25:17 +0000 Received: from [81.178.145.21] (helo=localhost) by mail.salmark.net with smtp (Exim 3.33 #2) id 1AI9QA-00029i-00 for rsgb_lf_group@blacksheep.org; Fri, 07 Nov 2003 11:25:14 -0500 From: john@blacksheep.org To: "Rsgb_lf_group" Message-ID: Date: Fri, 07 Nov 2003 11:25:14 -0500 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 31272 invoked from network); 23 Nov 2003 23:31:15 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 23 Nov 2003 23:31:15 -0000 Received: (qmail 7859 invoked from network); 23 Nov 2003 23:31:14 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 23 Nov 2003 23:31:08 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AO3fQ-0007At-H1 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 23 Nov 2003 23:29:24 +0000 Received: from [194.65.5.211] (helo=fep06-svc.mail.telepac.pt) by post.thorcom.com with esmtp (Exim 4.14) id 1AO3fP-0007Ak-Nv for rsgb_lf_group@blacksheep.org; Sun, 23 Nov 2003 23:29:23 +0000 X-Fake-Domain: ct1eeb Received: from ct1eeb ([81.193.101.190]) by fep06-svc.mail.telepac.pt (InterMail vM.5.01.04.13 201-253-122-122-113-20020313) with SMTP id <20031123232855.ICKU13614.fep06-svc.mail.telepac.pt@ct1eeb> for ; Sun, 23 Nov 2003 23:28:55 +0000 X-Bad-Message-ID: no DNS (ct1eeb) Message-ID: <001201c3b219$9bce9740$0100000a@ct1eeb> From: "Jose E. Ribeiro Sa" To: rsgb_lf_group@blacksheep.org References: Date: Sun, 23 Nov 2003 23:29:08 -0000 Organization: Jose E. Ribeiro Sa MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2720.3000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: Re: R: CT1/G3KEV Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Iam glad you enjoyed my country so much Mal. I guess you haven't forgot to ask ANACOM (our licensing authority) for the special permits authorizing you for the use of 6m., right ? Don't forget 137 Khz are also authorized under a special permit. By the way this 2 bands are not allowed and included in the CEPT agreement, so, you cannot TX in Portugal in 137 Khz and 50 Mhz using the CEPT License, but, I'm sure you hold a permanent (resident) license. I hold a 137 Khz special permit valid until 2005 and it says 135.7 to 137.8 Khz with a max ERP of 1 Watt. Yes, you read it well 1 WATT only. Hope they will allow you more when you ask for your permit during your next visit to the Algarve. See you in the LF. Jose CT1EEB VK8CS, former 4W6EB http://www.qsl.net/ct1eeb Da: hamilton mal A: rsgb_lf_group@blacksheep.org Oggetto: LF: CT1/G3KEV Data: martedì 18 novembre 2003 18.14 Hi All I have just returned from CT1/Algarve and had a great time dxing from there. CT1 is fairly rare, the radio amateur population is low compared to most other EU countries. I did work three LF operators on the higher frequencies OK1DTN, G0MRF and G3YMC and several hundred others world wide on various bands from 160 to 6 metres. The 6 metre band was interesting from the south coast of Portugal. I worked a number of ZS6 stations, V51E, TR8CA and RW1AY/MM in the South Atlantic off the West African coast. I did hear the UK beacon GB3MCB but no UK stations. I took all the necessary radio equipment and antennas with me. The portable station consisted of an ICOM 706 and a small 25A smpsu. The Antenna was an 80 metre doublet up at a height of about 18 metres and a suitable ATU to match the antenna on all bands to the transceiver. Everything worked well without snags. At my CT1 qth there was plenty of room for antennas for the LF bands even 137 khz and next time I might try it. I have arranged an even better qth next time with a villa and 20 acres of vineyard for antennas plus the swimming pool for a good earth. No one around my qth seemed bothered by my antenna mast and antennas. Most of the Algarve is covered by large 1- 2 metre satellite dishes and other large poles with TV antennas attached. Antennas of all varities are the norm there and the odd radio amateur mast and antennas just blends in hi . A big difference from the UK where some Councils insist on planning consent for small dishes that you could hardly see and a pole higher than the normal washing line is prohibited!!!!!!! It could be time to move South West to a villa with swimming pool, vineyard and no planning needed for masts and antennas all at affordable prices, plus good food, good beer and brandy and GOOD SERVICE at the right price. Airport security at LEEDS very thorough, when my equipment passed the xray machine all the lights and buzzers went off because of one dangerous looking item. I had to unpack one bag and the suspect item was my MORSE key. They had not encountered one of these devices before. One the way back at FARO airport the security xray light up just the same flashing lights etc but the man just waved me on, he obviously knows all about amateur radio and morse keys !!!!!!!!!!!!! 73 de Mal/G3KEV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 59972 invoked from network); 30 Nov 2003 15:38:25 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by ptb-mailstore with SMTP; 30 Nov 2003 15:38:25 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 15859 invoked by uid 10001); 30 Nov 2003 15:38:24 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 30 Nov 2003 15:38:17 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AQTZO-0002fd-5k for rsgb_lf_group-outgoing@blacksheep.org; Sun, 30 Nov 2003 15:33:10 +0000 Received: from [192.87.3.7] (helo=gate3.oss.akzonobel.nl) by post.thorcom.com with esmtp (Exim 4.14) id 1AQTZN-0002fP-6K for rsgb_lf_group@blacksheep.org; Sun, 30 Nov 2003 15:33:09 +0000 Received: (from root@localhost) by gate3.oss.akzonobel.nl (8.9.3c/8.6.12) id QAA32384 for ; Sun, 30 Nov 2003 16:32:38 +0100 (CET) Received: by gate3.oss.akzonobel.nl (TUNIX txp2/smap) for id sma031984; Sun, 30 Nov 03 16:32:00 +0100 Received: by triton.oss.intra with Internet Mail Service (5.5.2655.55) id ; Sun, 30 Nov 2003 16:32:01 +0100 X-Bad-Message-ID: no DNS (capella3.oss.akzonobel.nl) Message-ID: <639D20177889D41198A600508BAD3CA10864149F@capella3.oss.akzonobel.nl> From: "Laken, W.H.P.A. van der \(Wil\)" To: rsgb_lf_group@blacksheep.org Date: Sun, 30 Nov 2003 16:31:58 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Subject: LF: RE: new version of QRS Content-Type: text/plain; charset=iso-8859-1; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Thanks Rik, Wil PA0BWL -----Original Message----- From: Rik Strobbe [mailto:rik.strobbe@fys.kuleuven.ac.be] Sent: vrijdag 28 november 2003 11:40 To: rsgb_lf_group@blacksheep.org Cc: ik1zyw@yahoo.com; aflowers@frontiernet.net; johan_smet@pandora.be Subject: LF: new version of QRS I just released version 4.02 of QRS. New features /changes: ***** Changes from version 4.01 to 4.02 (November 2003) ***** 1. Message size increased for 70 chararcters to 250 characters (suggestion of ON5EX) 2. Soundcard can be used for DFCW tones and CW sidetone (suggestion of K0SM) 3. AutoStart feature allows automatic and unattended beacon mode (suggestion of IK1ZYW) 4. Some minor cosmetics QRS v4.02 can be downloaded from my website http://www.qsl.net/on7yd/ (click on software) or direct http://www.qsl.net/on7yd/zip/qrs402.zip Those who have a copy of QRS available for download on their websites are invited to copy the new version from the above site and make it available on their sites. 73, Rik ON7YD -------------------------------------------------------------------- This message, including attached files, may contain confidential information and is intended only for the use by the individual and/or the entity to which it is addressed. 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If you receive this message in error or if it is intended for someone else please notify the sender by returning this e-mail immediately and delete the message. -------------------------------------------------------------------- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 41134 invoked from network); 29 Nov 2003 01:19:02 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by ptb-mailstore with SMTP; 29 Nov 2003 01:19:02 -0000 Received: (qmail 14299 invoked by uid 10001); 29 Nov 2003 01:19:02 -0000 Content-Transfer-Encoding: 8bit X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 29 Nov 2003 01:18:50 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1APtk6-00033k-VV for rsgb_lf_group-outgoing@blacksheep.org; Sat, 29 Nov 2003 01:17:50 +0000 Received: from [64.4.23.42] (helo=hotmail.com) by post.thorcom.com with esmtp (Exim 4.14) id 1APtk5-00033X-Pe for rsgb_lf_group@blacksheep.org; Sat, 29 Nov 2003 01:17:50 +0000 X-Fake-Domain: mail Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Fri, 28 Nov 2003 17:17:18 -0800 Received: from 24.237.8.95 by lw15fd.law15.hotmail.msn.com with HTTP; Sat, 29 Nov 2003 01:17:17 GMT X-Originating-IP: [24.237.8.95] X-Originating-Email: [hellozerohellozero@hotmail.com] From: "Laurence KL1X" To: rsgb_lf_group@blacksheep.org Date: Fri, 28 Nov 2003 16:17:17 -0900 MIME-Version: 1.0 Message-ID: X-OriginalArrivalTime: 29 Nov 2003 01:17:18.0311 (UTC) FILETIME=[87F65770:01C3B616] Subject: LF: CFH into Alaska Content-Type: text/plain; charset=iso-8859-1; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 For the first time Ive got a good audible warbling copy of CFH on 137Khz at appx 0100Z. Its strong enough to "decode" - (not in the spying sense!) see http://www.kl1x.com/cfh.jpg The signals could welll have been coming here everynight but I hadnt played around with the controls on the rx much. The argo shot shows CFHs' signal submerged in Loran clutter but visually and audibly - switching the 870 NB' cleared all the Loran and hey presto CFH was clear as a bell.... The NB on the 870 is pretty stunning - Ill try the same thing with the 850 and see what happens. Laurence KL1X _________________________________________________________________ >From the hottest toys to tips on keeping fit this winter, youll find a range of helpful holiday info here. http://special.msn.com/network/happyholidays.armx From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 30949 invoked from network); 26 Nov 2003 03:02:48 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 26 Nov 2003 03:02:48 -0000 Received: (qmail 3538 invoked from network); 26 Nov 2003 03:02:47 -0000 Content-Transfer-Encoding: 8bit X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 26 Nov 2003 03:02:42 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOpsc-0002yC-71 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 26 Nov 2003 02:58:14 +0000 Received: from [64.4.23.39] (helo=hotmail.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AOpsZ-0002xs-1z for rsgb_lf_group@blacksheep.org; Wed, 26 Nov 2003 02:58:11 +0000 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Tue, 25 Nov 2003 18:57:39 -0800 Received: from 24.237.8.95 by lw15fd.law15.hotmail.msn.com with HTTP; Wed, 26 Nov 2003 02:57:39 GMT X-Originating-IP: [24.237.8.95] X-Originating-Email: [hellozerohellozero@hotmail.com] From: "Laurence KL1X" To: rsgb_lf_group@blacksheep.org Cc: jsm@gulfislands.com Date: Tue, 25 Nov 2003 17:57:39 -0900 MIME-Version: 1.0 Message-ID: X-OriginalArrivalTime: 26 Nov 2003 02:57:39.0759 (UTC) FILETIME=[0DC923F0:01C3B3C9] Subject: LF: Much better Content-Type: text/plain; charset=iso-8859-1; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 DCF39 was good cw strength to S7 from 0100Z and is still good CW strength at 0300Z First time for weeks and weeks Laurence KL1X anchorage wd2xdw 137,77356 _________________________________________________________________ Need a shot of Hank Williams or Patsy Cline? The classic country stars are always singing on MSN Radio Plus. Try one month free! http://join.msn.com/?page=offers/premiumradio From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7409 invoked from network); 21 Nov 2003 20:03:03 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 21 Nov 2003 20:03:03 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 24612 invoked from network); 21 Nov 2003 20:03:02 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 21 Nov 2003 20:02:57 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ANHSn-0004tq-St for rsgb_lf_group-outgoing@blacksheep.org; Fri, 21 Nov 2003 20:01:09 +0000 Received: from [64.4.23.64] (helo=hotmail.com) by post.thorcom.com with esmtp (Exim 4.14) id 1ANHSm-0004tX-Ti for rsgb_lf_group@blacksheep.org; Fri, 21 Nov 2003 20:01:09 +0000 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Fri, 21 Nov 2003 12:00:37 -0800 Received: from 136.226.254.148 by lw15fd.law15.hotmail.msn.com with HTTP; Fri, 21 Nov 2003 20:00:37 GMT X-Originating-IP: [136.226.254.148] X-Originating-Email: [hellozerohellozero@hotmail.com] From: "Laurence KL1X" To: rsgb_lf_group@blacksheep.org Date: Fri, 21 Nov 2003 11:00:37 -0900 MIME-Version: 1.0 Message-ID: X-OriginalArrivalTime: 21 Nov 2003 20:00:37.0773 (UTC) FILETIME=[21DE13D0:01C3B06A] Subject: Re: LF: RE: Beacons stays on Content-Type: text/plain; charset=iso-8859-1; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Jim - its been more than appauling unless you like Aurora - "Transpolar" is very poor and DCF39 is only just visible at dot 60. If you goto my web site and see the Argo with DCF39 at levels around -40 start blasting away! The Close to X ray flare around Midnite Thursday brightened up the trace by only a few dBs... It will improve a lot lot earlier for those on the East coast US before the nasties die away up here. The Alaskan/EU window will be short, probably. Cheers Laurence >From: "James Moritz" >Reply-To: rsgb_lf_group@blacksheep.org >To: >Subject: LF: RE: Beacons stays on >Date: Fri, 21 Nov 2003 19:38:18 -0000 > >Dear Laurence, LF Group, > >Glad to hear the beacon will be staying a bit longer than expected - >still no copy at the moment, conditions seem very poor. I am seeing >VO1NA pop up out of the noise during the evening and morning most >nights, but very weak or nothing at all between about 0000 and 0500 - >certainly very much down on conditions during October. No identifiable >sigs at all from any of the other North American beacons yet this >winter, but I live in hope! > >Cheers, Jim Moritz >73 de M0BMU > > _________________________________________________________________ Groove on the latest from the hot new rock groups! Get downloads, videos, and more here. http://special.msn.com/entertainment/wiredformusic.armx From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9115 invoked from network); 21 Nov 2003 18:26:50 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 21 Nov 2003 18:26:50 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 16472 invoked from network); 21 Nov 2003 18:26:50 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 21 Nov 2003 18:26:44 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ANFvM-0003eM-DW for rsgb_lf_group-outgoing@blacksheep.org; Fri, 21 Nov 2003 18:22:32 +0000 Received: from [64.4.23.40] (helo=hotmail.com) by post.thorcom.com with esmtp (Exim 4.14) id 1ANFvL-0003UJ-CZ for rsgb_lf_group@blacksheep.org; Fri, 21 Nov 2003 18:22:31 +0000 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Fri, 21 Nov 2003 10:21:59 -0800 Received: from 136.226.254.148 by lw15fd.law15.hotmail.msn.com with HTTP; Fri, 21 Nov 2003 18:21:59 GMT X-Originating-IP: [136.226.254.148] X-Originating-Email: [hellozerohellozero@hotmail.com] From: "Laurence KL1X" To: rsgb_lf_group@blacksheep.org, eric@willow.nutstreet.net, martin.howell@tiscali.co.uk, we0h@gentekcom.com Date: Fri, 21 Nov 2003 09:21:59 -0900 MIME-Version: 1.0 Message-ID: X-OriginalArrivalTime: 21 Nov 2003 18:21:59.0845 (UTC) FILETIME=[5A81ED50:01C3B05C] Subject: LF: Beacons stays on Content-Type: text/plain; charset=iso-8859-1; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 WD2XDW should stay on over the Xmas and into the New Year, but it is confirmed that it and me/Sheri are being moved close to the SE Kansas/NE Oklahoma Border in January sometime. By then, perhaps, the problem child may have calmed down a bit and signals maybe travelling a long way. laurence kl1x bp41xd wd2xdw 137,77355 ish 3.5Amps dot120, cw 6 status www.kl1x.com _________________________________________________________________ >From the hottest toys to tips on keeping fit this winter, youll find a range of helpful holiday info here. http://special.msn.com/network/happyholidays.armx From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25436 invoked from network); 14 Nov 2003 19:58:16 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 14 Nov 2003 19:58:16 -0000 Received: (qmail 8226 invoked by uid 10001); 14 Nov 2003 19:58:15 -0000 Content-Transfer-Encoding: 8bit X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 14 Nov 2003 19:57:58 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AKk4C-0004Df-L6 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 14 Nov 2003 19:57:16 +0000 Received: from [64.4.23.39] (helo=hotmail.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AKk4B-0004DU-J3 for rsgb_lf_group@blacksheep.org; Fri, 14 Nov 2003 19:57:15 +0000 X-Fake-Domain: mail Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Fri, 14 Nov 2003 11:56:43 -0800 Received: from 136.226.254.148 by lw15fd.law15.hotmail.msn.com with HTTP; Fri, 14 Nov 2003 19:56:42 GMT X-Originating-IP: [136.226.254.148] X-Originating-Email: [hellozerohellozero@hotmail.com] From: "Laurence KL1X" To: rsgb_lf_group@blacksheep.org Date: Fri, 14 Nov 2003 10:56:42 -0900 MIME-Version: 1.0 Message-ID: X-OriginalArrivalTime: 14 Nov 2003 19:56:43.0897 (UTC) FILETIME=[6D932E90:01C3AAE9] Subject: Re: LF: XFX Content-Type: text/plain; charset=iso-8859-1; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.2 required=5.0 tests=NORMAL_HTTP_TO_IP autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Welcome Eric - All - We have temps down to -20C at the moment and the ground continues to cool and freeze - we end up with the ground being frozen to around 1 metre at the end of the winter here in Anchorage. The "C" is reducing every day and the R tot is going down too with the frozen weather, even with the smaller earth system, which is now under the snow. So its a "dielectric" property change of wet soggy ground into a frozen sheet that improves the aerial current, save anything thats happening to the trees? Ive seen some notes on why this happens but has anyone got the full answer... This mornings (pre web update) Aerial currrent is around 4A for around 380W DC input. It was 2.1A at the beginning of the week @ 40F As a short time test Im streaming "live" audio on the web from the TS870 - both Tx (appx 773.56Hz tone on tx) and Rx noisey background of clattering Loran... The idea here was to allow nearly real time sync between the start of a character and remote monitoring (give or take a couple hundred Msecs) - the stream is at a slow 8K sec. From your Media Player type in http://24.237.8.95:8080 - make sure you have port 8080 open. Im still playing with this temp facility. Laurence KL1X/WD2XDW >From: Eric KD5UWL >Reply-To: rsgb_lf_group@blacksheep.org >To: LF-Group >Subject: LF: XFX >Date: Fri, 14 Nov 2003 10:48:34 -0600 (CST) > >Hi all, > >I'm new to the reflector -- Laurence KL1X told me about it. I've a new >2200m beacon on the air: http://www.nutstreet.net/xfx/ > >73 >Eric > > _________________________________________________________________ MSN Messenger with backgrounds, emoticons and more. http://www.msnmessenger-download.com/tracking/cdp_customize From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25556 invoked from network); 12 Nov 2003 23:25:55 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 12 Nov 2003 23:25:55 -0000 Received: (qmail 15281 invoked from network); 12 Nov 2003 23:25:55 -0000 Content-Transfer-Encoding: 8bit X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 12 Nov 2003 23:25:47 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AK4M4-0002Ki-Oj for rsgb_lf_group-outgoing@blacksheep.org; Wed, 12 Nov 2003 23:24:56 +0000 Received: from [64.4.23.83] (helo=hotmail.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AK4M3-0002KV-O8 for rsgb_lf_group@blacksheep.org; Wed, 12 Nov 2003 23:24:55 +0000 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 12 Nov 2003 15:24:24 -0800 Received: from 136.226.254.148 by lw15fd.law15.hotmail.msn.com with HTTP; Wed, 12 Nov 2003 23:24:23 GMT X-Originating-IP: [136.226.254.148] X-Originating-Email: [hellozerohellozero@hotmail.com] From: "Laurence KL1X" To: rsgb_lf_group@blacksheep.org Cc: eric@willow.nutstreet.net Date: Wed, 12 Nov 2003 14:24:23 -0900 MIME-Version: 1.0 Message-ID: X-OriginalArrivalTime: 12 Nov 2003 23:24:24.0335 (UTC) FILETIME=[1BBFA1F0:01C3A974] Subject: LF: New beacon on 137Khz - another part 5 licence beacon operational Content-Type: text/plain; charset=iso-8859-1; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Unless Ive missed it elsewhere on this site already, but Eric KD5UWL is running +24hrs around 90W and 1.5A aerial current into a top loaded vertical on 137Khz under the FCC Experimental Part 5 licence scheme - I think Ive seen reports to nearly 1000 miles north of Tulsa so far on this one. Eric continues to add radials and the current is coming up all the time. WD2XFX 137.78077 Glenpool, OK, EM25ax. QRSS30 'XFX' w/CW full ID; licensed under Part 5; op KD5UWL; status (2003/11/11) This taken from the LWCA Lowfer database. (thanks) - Well done Eric Laurence KL1X/Wd2XDW in the snow. "XDW" 137,77356 3.5AI D120 cw6 _________________________________________________________________ Compare high-speed Internet plans, starting at $26.95. https://broadband.msn.com (Prices may vary by service area.) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14449 invoked from network); 12 Nov 2003 18:06:44 -0000 Received: from netmail00.services.quay.plus.net (212.159.14.218) by mailstore with SMTP; 12 Nov 2003 18:06:44 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 19559 invoked from network); 12 Nov 2003 18:06:44 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 12 Nov 2003 18:06:36 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AJzKL-0005MU-0T for rsgb_lf_group-outgoing@blacksheep.org; Wed, 12 Nov 2003 18:02:49 +0000 Received: from [64.4.23.21] (helo=hotmail.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AJzKJ-0005MH-Bl for rsgb_lf_group@blacksheep.org; Wed, 12 Nov 2003 18:02:47 +0000 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 12 Nov 2003 10:02:15 -0800 Received: from 136.226.254.148 by lw15fd.law15.hotmail.msn.com with HTTP; Wed, 12 Nov 2003 18:02:14 GMT X-Originating-IP: [136.226.254.148] X-Originating-Email: [hellozerohellozero@hotmail.com] From: "Laurence KL1X" To: rsgb_lf_group@blacksheep.org Date: Wed, 12 Nov 2003 09:02:14 -0900 MIME-Version: 1.0 Message-ID: X-OriginalArrivalTime: 12 Nov 2003 18:02:15.0828 (UTC) FILETIME=[1B0F8540:01C3A947] Subject: Re: LF: Dummy-Load on LW Content-Type: text/plain; charset=iso-8859-1; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 I found a thread that says something to the effect that 50 ohm was chosen (in the US) during the war period because of the standard diameters available in copper tubing at the time (!) - that sort of makes sense D/d and all that....must be all hard line! Laurence (too young to rem WW2) >From: "captbrian" >Reply-To: rsgb_lf_group@blacksheep.org >To: >Subject: Re: LF: Dummy-Load on LW >Date: Wed, 12 Nov 2003 08:04:52 -0000 > >which raises the question I have often wondered about. > When I started in ham radio all coax was post-war surplus 75 ohm. I >assumed >in my youth it was to match a free-space dipole !. > >When I came back to radio after a thirty-year absence in 1990 all was 50 >ohm. > >Who, when and why did someone decide to change to 50 ohm ?? > >Bryan G3GVB >-----Original Message----- >From: Hans-Joachim Brandt >To: rsgb_lf_group@blacksheep.org >Date: 12 November 2003 00:16 >Subject: Re: LF: Dummy-Load on LW > > >Dear all, > >around 1959, when I joined Rohde&Schwarz in Munich, 60 ohms has been the >standard cable impedance in Germany for all broadcast and television >transmitters in the fifties and for other commercial RF equipment. Cage and >other transmitting antennas were also designed for 60 ohms. I have also >built my first amateur radio dummy load for 60 ohms. > >I do not know exactly the reason for 60 ohms, somebody has told me that >this >impedance has been a compromise between 50 ohms and 75 ohms, (perhaps >following the idea that 75 ohms allows the production of cables with >minimum >losses whilst 50 ohms would allow to send higher power through a coaxial >cable). > >On the other hand 75 ohms has been used and is still in use for video >equipment in TV transmitters and studio equipment; higher video voltages >needed for TV modulator stages have often been terminated with 150 ohms to >save power, generating double the voltage with the same current. > >But in the sixties a change to 50 ohms impedance for RF equipment became >standard also in Germany, there was a need to match to the international >market standards. > >Concerning receiving antennas, the first VHF FM and TV antennas in the >early >fifties in Germany were folded dipoles with a 300 ohms symmetrical cable >feed. But soon the folded dipole with reflector (and some directors) became >popular, using 240 ohms symmetrical cable for about two decades (thus >confirming Wolf's [DL4YHF] contribution), TV distribution systems in houses >used 60 ohms with a 4:1 balun to connect the antennas (for the TV receivers >with 240 ohms symmetrical input another 1:4 balun was needed to connect >them >to the 60 ohms house system). Later on TV receivers and TV receiving >antennas were changed to 75 Ohms coaxial, CATV systems used 75 ohms from >the >beginning, the CATV start in Germany has been rather late, about 1984. > >By the way, a lot of russian Surplus HF equipment which became available in >Germany after the breakdown of the iron curtain, even automatic antenna >tuners, were designed for 75 ohms impedance. > >73 Ha-Jo, DJ1ZB > > >"Walter Blanchard" schrieb: > > DK8ND's email raises an interesting point. Can any of our German friends >tell me why an impedance of 60 ohms was popular in Germany for some time >but >not anywhere else? > > > > Walter G3JKV. > > > > > > > > > > --- > > > > Checked by AVG anti-virus system (http://www.grisoft.com). > > Version: 6.0.525 / Virus Database: 322 - Release Date: 09/10/03 > > > > > > _________________________________________________________________ Is your computer infected with a virus? Find out with a FREE computer virus scan from McAfee. Take the FreeScan now! http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23841 invoked from network); 12 Nov 2003 02:08:17 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 12 Nov 2003 02:08:17 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 11672 invoked from network); 12 Nov 2003 02:08:17 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 12 Nov 2003 02:08:11 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AJkPt-0008Ml-CT for rsgb_lf_group-outgoing@blacksheep.org; Wed, 12 Nov 2003 02:07:33 +0000 Received: from [64.4.23.34] (helo=hotmail.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AJkPs-0008LG-0q for rsgb_lf_group@blacksheep.org; Wed, 12 Nov 2003 02:07:32 +0000 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Tue, 11 Nov 2003 18:07:00 -0800 Received: from 24.237.8.95 by lw15fd.law15.hotmail.msn.com with HTTP; Wed, 12 Nov 2003 02:07:00 GMT X-Originating-IP: [24.237.8.95] X-Originating-Email: [hellozerohellozero@hotmail.com] From: "Laurence KL1X" To: rsgb_lf_group@blacksheep.org Date: Tue, 11 Nov 2003 17:07:00 -0900 MIME-Version: 1.0 Message-ID: X-OriginalArrivalTime: 12 Nov 2003 02:07:00.0403 (UTC) FILETIME=[A867B830:01C3A8C1] Subject: Re: LF: 'Evaluating Receive Antennas using a Soundcard' Content-Type: text/plain; charset=iso-8859-1; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Thanks Steve - it was good to "see" ya - Laurence Kl1X >From: Steve Dove >Reply-To: rsgb_lf_group@blacksheep.org >To: rsgb_lf_group@blacksheep.org >Subject: LF: 'Evaluating Receive Antennas using a Soundcard' >Date: Wed, 12 Nov 2003 00:51:59 -0000 > >Greetings, > >Buckling under to overwhelming popular clamour (thanks, mum) a webbly-fied >version of >the talk from the RSGB HF Conference last week is at: > >http://www.w3eee.com > >under 'RSGB talk'. > > Cheers, > > Steve > > > > _________________________________________________________________ MSN Shopping upgraded for the holidays! Snappier product search... http://shopping.msn.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 28242 invoked from network); 6 Nov 2003 21:17:39 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 6 Nov 2003 21:17:39 -0000 Received: (qmail 8160 invoked by uid 10001); 6 Nov 2003 21:17:38 -0000 Content-Transfer-Encoding: 8bit X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 6 Nov 2003 21:17:25 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AHrT3-00038L-M3 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 06 Nov 2003 21:15:01 +0000 Received: from [64.4.23.88] (helo=hotmail.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AHrT0-00036O-Fx for rsgb_lf_group@blacksheep.org; Thu, 06 Nov 2003 21:14:58 +0000 X-Fake-Domain: mail Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Thu, 6 Nov 2003 13:14:26 -0800 Received: from 24.237.8.95 by lw15fd.law15.hotmail.msn.com with HTTP; Thu, 06 Nov 2003 21:14:26 GMT X-Originating-IP: [24.237.8.95] X-Originating-Email: [hellozerohellozero@hotmail.com] From: "Laurence KL1X" To: rsgb_lf_group@blacksheep.org, lowfer@mailman.qth.net Date: Thu, 06 Nov 2003 12:14:26 -0900 MIME-Version: 1.0 Message-ID: X-OriginalArrivalTime: 06 Nov 2003 21:14:26.0858 (UTC) FILETIME=[F59C90A0:01C3A4AA] Subject: Re: LF: XDW back on 2112Z 6th Content-Type: text/plain; charset=iso-8859-1; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 T21 computer replaced - XDW back on 2112Z 6th 137,77356 QRSS120 3.1A aerial current. Bp41xd anchorage Laurence KL1X _________________________________________________________________ Is your computer infected with a virus? Find out with a FREE computer virus scan from McAfee. Take the FreeScan now! http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 24117 invoked from network); 6 Nov 2003 18:56:28 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 6 Nov 2003 18:56:28 -0000 Received: (qmail 22353 invoked by uid 10001); 6 Nov 2003 18:56:27 -0000 Content-Transfer-Encoding: 8bit X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 6 Nov 2003 18:56:15 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AHpEI-0001Sz-5j for rsgb_lf_group-outgoing@blacksheep.org; Thu, 06 Nov 2003 18:51:38 +0000 Received: from [64.4.23.97] (helo=hotmail.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AHpEF-0001Sq-4T for rsgb_lf_group@blacksheep.org; Thu, 06 Nov 2003 18:51:35 +0000 X-Fake-Domain: mail Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Thu, 6 Nov 2003 10:51:03 -0800 Received: from 136.226.254.148 by lw15fd.law15.hotmail.msn.com with HTTP; Thu, 06 Nov 2003 18:51:01 GMT X-Originating-IP: [136.226.254.148] X-Originating-Email: [hellozerohellozero@hotmail.com] From: "Laurence KL1X" To: rsgb_lf_group@blacksheep.org, martin.howell@tiscali.co.uk Date: Thu, 06 Nov 2003 09:51:01 -0900 MIME-Version: 1.0 Message-ID: X-OriginalArrivalTime: 06 Nov 2003 18:51:03.0547 (UTC) FILETIME=[EDA37CB0:01C3A496] Subject: LF: XDW temp off 1730Z 6th Content-Type: text/plain; charset=iso-8859-1; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 The T21 Laptop I use for beacon sequencing and IIS web server funtions has died this morning. The LCD screen has gone terminal, but Ill find something to plug it into again later this afternoon and the beacon will be back on this evening AK time. Aerial current was 3.1A for around 360W and Tx freq remains near o 137,773.556 @ QRSS120 even with a much reduced earthing.sys The extensive 160/80 radial.sys and earth mat are all now pulled up and I have only the visible and easily pullable well casing and about 10 x 8 ft rods tied back to the system - it is due to snow (finally) in Anchorage this weekend and this was my last chance to pull everything up before it really freezes in. No news on tower removal date but still planned for 24 November. No confirmed news on move location either....its like waiting for Chrsitmas. Regards Laurence KL1X/WD2XDW http://www.kl1x.com (back on when I fix this pc) _________________________________________________________________ Great deals on high-speed Internet access as low as $26.95. https://broadband.msn.com (Prices may vary by service area.) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 17704 invoked from network); 9 Nov 2003 00:21:40 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 9 Nov 2003 00:21:40 -0000 Received: (qmail 12473 invoked from network); 9 Nov 2003 00:21:39 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 9 Nov 2003 00:21:33 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AIdHH-0000ns-Jq for rsgb_lf_group-outgoing@blacksheep.org; Sun, 09 Nov 2003 00:18:03 +0000 Received: from [152.163.225.100] (helo=imo-r04.mx.aol.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AIdHG-0000ni-GQ for rsgb_lf_group@blacksheep.org; Sun, 09 Nov 2003 00:18:02 +0000 X-Fake-Domain: MarkusVester@aol.com Received: from MarkusVester@aol.com by imo-r04.mx.aol.com (mail_out_v36_r1.1.) id l.160.28090a51 (3980) for ; Sat, 8 Nov 2003 19:17:28 -0500 (EST) From: MarkusVester@aol.com Message-ID: <160.28090a51.2cdee195@aol.com> Date: Sat, 8 Nov 2003 19:17:25 EST To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 8.0 for Windows sub 6104 Subject: LF: VO1NA, RU6LA Fri/Sat and tonight Content-Type: multipart/mixed; boundary="------------070004070105090903060707" X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=HTML_MESSAGE,NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 This is a multi-part message in MIME format. --------------070004070105090903060707 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: 8bit Hi group,

sigs from VO1NA were visible on 137777.06 several times last night: 2:00 - 2:10, 3:40 - 3:55, 4:22 - 4:33 and 5:56 - 6:21 UT. The last opening was not quite M copy at 21mHz FFT resolution, with fieldstrength estimated  -26 .. -20 dBµV/m (see SpecLab capture).

CFH had shut down suddenly at 23:47 both yesterday and today.

RU6LA on 135945 was up to 12 dBuV/m. Tonight, Ed is clearly readable on top of SXV's upper FSK sideband. The minimum between their first and (much weaker) second sidebands is currently around 135962 Hz.

Now at midnight UT, the sky has cleared up for an impressive display of Earth's shadow eclipsing the full moon.

73 and best wishes
Markus
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2003 22:25:10 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AP814-0002rg-Fr for rsgb_lf_group-outgoing@blacksheep.org; Wed, 26 Nov 2003 22:20:10 +0000 Received: from [217.158.195.178] (helo=andromeda.czd.org.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1AP812-0002rX-OH for rsgb_lf_group@blacksheep.org; Wed, 26 Nov 2003 22:20:08 +0000 X-Fake-Domain: orion Received: from orion (orion.bikerz.local [192.168.0.3]) by andromeda.czd.org.uk (8.11.6/8.11.6/SuSE Linux 0.5) with SMTP id hAQMOSS10932 for ; Wed, 26 Nov 2003 22:24:31 GMT From: "Martyn" To: rsgb_lf_group@blacksheep.org Date: Wed, 26 Nov 2003 22:20:03 -0000 X-Bad-Message-ID: no DNS (bikerz.local) Message-ID: <006b01c3b46b$719d7230$0300a8c0@bikerz.local> MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2910.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: Newbie question Content-Type: multipart/mixed; boundary="------------050000060409080102050400" X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 This is a multi-part message in MIME format. --------------050000060409080102050400 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit Hi folks, I have been monitoring 137 for a couple of weeks now, but for the last week or so I have been getting this consistent 1 second broadband (from about 133khz to about 139khz pulse. see attached jpg. Is this typical? or better still can anyone suggest what it might be please? DCF39 is clear on the trace and very strong.. Even better, can I get rid of it. The next step is probably a noise canceller but I'm not sure how effective this will be on a broadband noise pulse Ant is a dual vertical wire to approx 10m high with a pair of 18m horizontal Capacity wires seperated by abt 800mm in an offset 'T' formation. Looding coil is about 5mH. Rx pre-amplifier is the Mk1 G0MRF kit feeding my FT-920 HF rig. Thanks Martyn ---------------------------------------- Martyn Kinder G0CZD mailto:martyn@czd.org.uk http://www.czd.org.uk --------------050000060409080102050400 Content-Type: image/jpeg; name="qrss1.jpg" Content-Transfer-Encoding: base64 Content-Disposition: inline; filename="qrss1.jpg" /9j/4AAQSkZJRgABAQEASABIAAD/2wBDABALDA4MChAODQ4SERATGCkbGBYWGDIkJh4pOzQ+ PTo0OThBSV5QQUVZRjg5Um9TWWFkaWppP09ze3Jmel5naWX/2wBDARESEhgVGDAbGzBlQzlD ZWVlZWVlZWVlZWVlZWVlZWVlZWVlZWVlZWVlZWVlZWVlZWVlZWVlZWVlZWVlZWVlZWX/wAAR CADfAUUDASIAAhEBAxEB/8QAGwAAAQUBAQAAAAAAAAAAAAAABQECAwQGAAf/xABQEAABAwIE AgQJCQUEBwgDAAABAgMRACEEBRIxQVEGEyJhFBUyM3GBkaHBFlJTVHKSsdHSI0Kz4fAkYnOU JTVVZIKi4iY0RHSEk8LxRWOy/8QAGAEBAQEBAQAAAAAAAAAAAAAAAAECAwT/xAAmEQACAgED BAIDAQEAAAAAAAAAAQIRMQMSIRMyQVEicULB8GEE/9oADAMBAAIRAxEAPwCVxWZ4rN8xCMyV hcLhyqCVDcCyQONU8KvO8R4UnxopDjC9CUlUhwiSYPIAE2nh6aO4nL8MxjHMQl/FMOYl0JUW XSmTwmKH+JMjUQdbh1XB1G/GZjkZ9F6sGlK2dJyThtS5KzaM/cSFIzQKSVaZClbyofN/uH3U 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kdhVjBHLkTVshMV4FxXaGHUValEkJN+Mnn+VToQylOptDYSqLpSADy/lQwYzKAAA4RAIHl2B 3jltUwzfLkpCQ+QEgAdlXCgLJ8GVqK0NjQoolaQLm5iec+ul6/CFMdYxpgCJEQNvVVNWZ5Yq ZeN1BRhKxcRH4Co0YvJ20BCHFJSABALg2Mj30BdL+BQ2QFYfTdBCdPEiR+dTBtlbcBtstqAE BIgjh6r0MVjMnVErIAECNYtM8O+p05vlyEhKX4AEDsqPwoC6W0FARpASCCAkREXG1Vn0BzEK RtASpMJTdR1XJIPBIpnjnAfT/wDIr8qpYvNW+v14V1oyEyVlaSCNX9w/OqMqLDxGGUkK1AIS pYI6u1pMdiZtwpqG2HFqbQsalyCUhAJkc+r4j2iqDmYrdIK14VUAjzi+Nvo+8+2o28YW3utQ rDBX+IuOPDq+Ris8lC5Km80wiVdpTzhC1KCSY0KO4SDwq6lnDo8jCsJtps2BblQFvMNeYYZ/ EPMBDKio6VLJPZUPmD51W/HTfNn76/0U5BaRisEEuK6hlASVN+Sm8G4sfcasYdTKm0usstpC 0gghGkxFqDnH4RQIUllQJJguOG53jsWqVOcMoQEp6gJSIA1rsPuU5HBVz5wut4dSonW6m3IK gfhXVWzTFMussJS4lSgpxSgkGBqVI3ArqoP/2Q== --------------050000060409080102050400-- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1368 invoked from network); 23 Nov 2003 22:50:17 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 23 Nov 2003 22:50:17 -0000 Received: (qmail 1928 invoked from network); 23 Nov 2003 22:50:17 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 23 Nov 2003 22:50:12 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AO31p-0006Yj-Oz for rsgb_lf_group-outgoing@blacksheep.org; Sun, 23 Nov 2003 22:48:29 +0000 Received: from [193.70.192.51] (helo=smtp1.libero.it) by post.thorcom.com with esmtp (Exim 4.14) id 1AO31a-0006Ya-Te for rsgb_lf_group@blacksheep.org; Sun, 23 Nov 2003 22:48:19 +0000 X-Fake-Domain: default Received: from default (151.30.70.197) by smtp1.libero.it (7.0.020-DD01) id 3F6F0E48013FC3C0 for rsgb_lf_group@blacksheep.org; Sun, 23 Nov 2003 23:48:10 +0100 From: "Matteo" To: rsgb_lf_group@blacksheep.org Date: Fri, 21 Nov 2003 13:26:08 +0100 X-MSMail-Priority: Normal X-Priority: 3 X-Mailer: Microsoft Internet Mail 4.70.1155 MIME-Version: 1.0 Message-ID: Subject: LF: R: CT1/G3KEV Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.8 required=5.0 tests=MISSING_MIMEOLE,MISSING_OUTLOOK_NAME,SUBJ_ALL_CAPS autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 hi Hamilton , i read this with great intrest probably in police accademy teach to cover the bad thing made by Prince Carlo Soon's and not teach something about amateur radio world ??????? how do you think ?? 73 Matteo ---------- Da: hamilton mal A: rsgb_lf_group@blacksheep.org Oggetto: LF: CT1/G3KEV Data: martedì 18 novembre 2003 18.14 Hi All I have just returned from CT1/Algarve and had a great time dxing from there. CT1 is fairly rare, the radio amateur population is low compared to most other EU countries. I did work three LF operators on the higher frequencies OK1DTN, G0MRF and G3YMC and several hundred others world wide on various bands from 160 to 6 metres. The 6 metre band was interesting from the south coast of Portugal. I worked a number of ZS6 stations, V51E, TR8CA and RW1AY/MM in the South Atlantic off the West African coast. I did hear the UK beacon GB3MCB but no UK stations. I took all the necessary radio equipment and antennas with me. The portable station consisted of an ICOM 706 and a small 25A smpsu. The Antenna was an 80 metre doublet up at a height of about 18 metres and a suitable ATU to match the antenna on all bands to the transceiver. Everything worked well without snags. At my CT1 qth there was plenty of room for antennas for the LF bands even 137 khz and next time I might try it. I have arranged an even better qth next time with a villa and 20 acres of vineyard for antennas plus the swimming pool for a good earth. No one around my qth seemed bothered by my antenna mast and antennas. Most of the Algarve is covered by large 1- 2 metre satellite dishes and other large poles with TV antennas attached. Antennas of all varities are the norm there and the odd radio amateur mast and antennas just blends in hi . A big difference from the UK where some Councils insist on planning consent for small dishes that you could hardly see and a pole higher than the normal washing line is prohibited!!!!!!! It could be time to move South West to a villa with swimming pool, vineyard and no planning needed for masts and antennas all at affordable prices, plus good food, good beer and brandy and GOOD SERVICE at the right price. Airport security at LEEDS very thorough, when my equipment passed the xray machine all the lights and buzzers went off because of one dangerous looking item. I had to unpack one bag and the suspect item was my MORSE key. They had not encountered one of these devices before. One the way back at FARO airport the security xray light up just the same flashing lights etc but the man just waved me on, he obviously knows all about amateur radio and morse keys !!!!!!!!!!!!! 73 de Mal/G3KEV From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5448 invoked from network); 27 Nov 2003 09:16:01 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 27 Nov 2003 09:16:01 -0000 Received: (qmail 26317 invoked by uid 10001); 27 Nov 2003 09:16:00 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 27 Nov 2003 09:15:10 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1API8z-0004ON-QV for rsgb_lf_group-outgoing@blacksheep.org; Thu, 27 Nov 2003 09:09:01 +0000 Received: from [62.253.162.47] (helo=mta07-svc.ntlworld.com) by post.thorcom.com with esmtp (Exim 4.14) id 1API8t-0004OE-Rg for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2003 09:08:56 +0000 X-Fake-Domain: mikedennison Received: from mikedennison ([80.4.116.83]) by mta07-svc.ntlworld.com (InterMail vM.4.01.03.37 201-229-121-137-20020806) with ESMTP id <20031127090849.PRSY15835.mta07-svc.ntlworld.com@mikedennison> for ; Thu, 27 Nov 2003 09:08:49 +0000 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Thu, 27 Nov 2003 09:08:49 -0000 MIME-Version: 1.0 Message-ID: <3FC5BF21.13674.292E1C@localhost> In-reply-to: <006b01c3b46b$719d7230$0300a8c0@bikerz.local> X-Mailer: Pegasus Mail for Windows (v4.12a) Content-Description: Mail message body Subject: Re: LF: Newbie question Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 > I have been monitoring 137 for a couple of weeks now, but for the last week > or so I have been getting this consistent 1 second broadband (from about > 133khz to about 139khz pulse. see attached jpg. Is this typical? or better > still can anyone suggest what it might be please? DCF39 is clear on the > trace and very strong.. Even better, can I get rid of it. The next step is > probably a noise canceller but I'm not sure how effective this will be on a > broadband noise pulse > ---------------------------------------- > Martyn Kinder G0CZD Martyn, This could be a video recorder that has not had its timer set (ie the display is pulsing on and off). I have had this experience with VCRs within about 30 metres. Mike, G3XDV =========== From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 20278 invoked from network); 20 Nov 2003 13:44:51 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 20 Nov 2003 13:44:51 -0000 Received: (qmail 6927 invoked by uid 10001); 20 Nov 2003 13:44:49 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 20 Nov 2003 13:43:21 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AMp3m-0006OT-W1 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 20 Nov 2003 13:41:26 +0000 Received: from [62.253.162.46] (helo=mta06-svc.ntlworld.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AMp3m-0006OK-FZ for rsgb_lf_group@blacksheep.org; Thu, 20 Nov 2003 13:41:26 +0000 X-Fake-Domain: mikedennison Received: from mikedennison ([80.4.116.83]) by mta06-svc.ntlworld.com (InterMail vM.4.01.03.37 201-229-121-137-20020806) with ESMTP id <20031120134126.CVPI13354.mta06-svc.ntlworld.com@mikedennison> for ; Thu, 20 Nov 2003 13:41:26 +0000 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Thu, 20 Nov 2003 13:41:19 -0000 MIME-Version: 1.0 Message-ID: <3FBCC47F.20107.DAA81@localhost> In-reply-to: <000601c3aee7$723ec2e0$2bc428c3@erica> X-Mailer: Pegasus Mail for Windows (v4.12a) Content-Description: Mail message body Subject: Re: LF: CT1/G3KEV Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 On 19 Nov 2003 at 21:52, g3ldo wrote: > I carried my . . . >. . . antenna mast (fibre glass telescopic roach pole, used as a walking > stick) as hand luggage. Obviously the customs man had never seen 'The Day of the Jackal'. Mike, G3XDV =========== From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22798 invoked from network); 8 Nov 2003 17:51:04 -0000 Received: from netmail00.services.quay.plus.net (212.159.14.218) by mailstore with SMTP; 8 Nov 2003 17:51:04 -0000 Received: (qmail 21313 invoked from network); 8 Nov 2003 17:51:04 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 8 Nov 2003 17:50:58 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AIXDG-0004bl-IT for rsgb_lf_group-outgoing@blacksheep.org; Sat, 08 Nov 2003 17:49:30 +0000 Received: from [64.136.30.74] (helo=m11.lax.untd.com) by post.thorcom.com with smtp (Exim 4.14) id 1AIXDF-0004bN-DZ for rsgb_lf_group@blacksheep.org; Sat, 08 Nov 2003 17:49:29 +0000 Received: from cookie.untd.com by cookie.untd.com for <"yokUgcxCbtTP7XLrpefewKiCvr9tU1NvAZK4+0VveciAUGuDZLC3FQ==">; Sat, 08 Nov 2003 09:48:56 PST Received: (from riese-k3djc@juno.com) by m11.lax.untd.com (jqueuemail) id JEGWFAN8; Sat, 08 Nov 2003 09:48:56 PST To: rsgb_lf_group@blacksheep.org Date: Sat, 8 Nov 2003 12:28:35 -0500 Message-ID: <20031108.124807.932.1.riese-k3djc@juno.com> X-Mailer: Juno 5.0.13 MIME-Version: 1.0 X-Juno-Line-Breaks: 0,2-6,8-32 From: riese-k3djc@juno.com Subject: Re: LF: On Air Testing Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 With all the comments on Loads,,, put them in a container and add mineral oil would really boost their rating ,, just allow for some venting Bob K3DJC On Sat, 8 Nov 2003 01:23:05 +0100 0482183881-0001@t-online.de (jannsen) writes: > James Moritz schrieb: > > ............... > > > Several people have resorted to electric heating elements like > > toasters and fan heaters to make satisfactory LF dummy loads. > > Hi Jim es all, > > here are two dummy loads in use; one is a bulb 110V/DC500W, Z 35 Ohm > on 136kHz > (bridge measurement) and the other is made of four hollow ceramic > resistors > 200 Ohm/60W each, makes 200W only. but blowing air through the > resistors > (see attachment) makes a lukewarm 300W dummy on 136kHz (0,4uH only). > > I tried 800W. A peace of paper above the dummy caught fire within 10 > sec. > > regards > Uwe/dj8wx > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 70094 invoked from network); 28 Nov 2003 10:40:37 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by ptb-mailstore with SMTP; 28 Nov 2003 10:40:37 -0000 Received: (qmail 18060 invoked from network); 28 Nov 2003 10:40:44 -0000 Content-Transfer-Encoding: 8bit X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-Priority: 3 X-MSMail-Priority: Normal Received: from post.thorcom.com (193.82.116.20) by warrior.services.quay.plus.net with SMTP; 28 Nov 2003 10:40:12 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1APg1i-0000eI-Lx for rsgb_lf_group-outgoing@blacksheep.org; Fri, 28 Nov 2003 10:39:06 +0000 Received: from [134.58.240.45] (helo=thumbler.kulnet.kuleuven.ac.be) by post.thorcom.com with esmtp (Exim 4.14) id 1APg1h-0000d6-MO for rsgb_lf_group@blacksheep.org; Fri, 28 Nov 2003 10:39:05 +0000 Received: from localhost (localhost [127.0.0.1]) by thumbler.kulnet.kuleuven.ac.be (Postfix) with ESMTP id 75A03137B37; Fri, 28 Nov 2003 11:38:35 +0100 (CET) Received: from antonius.kulnet.kuleuven.ac.be (antonius.kulnet.kuleuven.ac.be [134.58.240.73]) by thumbler.kulnet.kuleuven.ac.be (Postfix) with ESMTP id EAB70137B01; Fri, 28 Nov 2003 11:38:34 +0100 (CET) X-Fake-Domain: dell-rik.fys.kuleuven.ac.be Received: from dell-rik.fys.kuleuven.ac.be (pc-10-33-165-177.fys.kuleuven.ac.be [10.33.165.177]) by antonius.kulnet.kuleuven.ac.be (Postfix) with ESMTP id 95B7F4C0D1; Fri, 28 Nov 2003 11:38:34 +0100 (CET) Message-ID: <5.1.0.14.0.20031128113230.031ef4b8@u0019445.kuleuven.be> X-Sender: u0019445@u0019445.kuleuven.be X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Fri, 28 Nov 2003 11:40:15 +0100 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Cc: ik1zyw@yahoo.com, aflowers@frontiernet.net, johan_smet@pandora.be In-reply-to: <000001c3b4f7$5047f240$fce8c593@rsch15> References: <3FC5977400001852@mail-4.tiscali.it> MIME-Version: 1.0 X-Virus-Scanned: by KULeuven Antivirus Cluster Subject: LF: new version of QRS Content-Type: text/plain; charset=us-ascii; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 I just released version 4.02 of QRS. New features /changes: ***** Changes from version 4.01 to 4.02 (November 2003) ***** 1. Message size increased for 70 chararcters to 250 characters (suggestion of ON5EX) 2. Soundcard can be used for DFCW tones and CW sidetone (suggestion of K0SM) 3. AutoStart feature allows automatic and unattended beacon mode (suggestion of IK1ZYW) 4. Some minor cosmetics QRS v4.02 can be downloaded from my website http://www.qsl.net/on7yd/ (click on software) or direct http://www.qsl.net/on7yd/zip/qrs402.zip Those who have a copy of QRS available for download on their websites are invited to copy the new version from the above site and make it available on their sites. 73, Rik ON7YD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 32143 invoked from network); 24 Nov 2003 09:25:21 -0000 Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 24 Nov 2003 09:25:21 -0000 Received: (qmail 12505 invoked from network); 24 Nov 2003 09:25:28 -0000 Content-Transfer-Encoding: 8bit X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by warrior.services.quay.plus.net with SMTP; 24 Nov 2003 09:25:22 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOCr3-00071Q-Bu for rsgb_lf_group-outgoing@blacksheep.org; Mon, 24 Nov 2003 09:18:01 +0000 Received: from [134.58.240.41] (helo=nibbel.kulnet.kuleuven.ac.be) by post.thorcom.com with esmtp (Exim 4.14) id 1AOCr2-00070y-E9 for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 09:18:00 +0000 Received: from localhost (localhost [127.0.0.1]) by nibbel.kulnet.kuleuven.ac.be (Postfix) with ESMTP id 3A78E4B601 for ; Mon, 24 Nov 2003 10:17:30 +0100 (CET) Received: from lepidus.kulnet.kuleuven.ac.be (lepidus.kulnet.kuleuven.ac.be [134.58.240.72]) by nibbel.kulnet.kuleuven.ac.be (Postfix) with ESMTP id C0EC34B5F2 for ; Mon, 24 Nov 2003 10:17:29 +0100 (CET) X-Fake-Domain: dell-rik.fys.kuleuven.ac.be Received: from dell-rik.fys.kuleuven.ac.be (pc-10-33-165-177.fys.kuleuven.ac.be [10.33.165.177]) by lepidus.kulnet.kuleuven.ac.be (Postfix) with ESMTP id 9DE86380002 for ; Mon, 24 Nov 2003 10:17:29 +0100 (CET) Message-ID: <5.1.0.14.0.20031124101459.01d0d0e0@u0019445.kuleuven.be> X-Sender: u0019445@u0019445.kuleuven.be X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Mon, 24 Nov 2003 10:19:03 +0100 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" In-reply-to: <002a01c3b269$733577e0$5ac428c3@bryan2> MIME-Version: 1.0 X-Virus-Scanned: by KULeuven Antivirus Cluster Subject: Re: LF: Re: Re: R: CT1/G3KEV Content-Type: text/plain; charset=us-ascii; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 >I hold a 137 Khz special permit valid until 2005 and it says >135.7 to 137.8 Khz with a max ERP of 1 Watt. >Yes, you read it well 1 WATT only. Jose, We all have the 1 Watt ERP limit, it is implemented in the CEPT recommendation that allows ham operation on 137kHz. But keep in mind that antenna efficiency is extemely low on LF, most likely 0.1% or less. So you probably need more than 1kW TX power to get 1 Watt ERP. I guess that my ERP is about 30 to 50 mW, running 350 Watt RF power. Best DX is CW is OH1TN (about 1700km), so you can do a lot with just a few mW ERP. 73, Rik ON7YD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 927 invoked from network); 9 Nov 2003 07:46:06 -0000 Received: from unknown (HELO murphys.services.quay.plus.net) (212.159.14.225) by mailstore with SMTP; 9 Nov 2003 07:46:06 -0000 Received: (qmail 15650 invoked from network); 9 Nov 2003 07:45:57 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by murphys.services.quay.plus.net with SMTP; 9 Nov 2003 07:45:43 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AIkEw-0006p9-RS for rsgb_lf_group-outgoing@blacksheep.org; Sun, 09 Nov 2003 07:44:06 +0000 Received: from [213.42.1.91] (helo=domail2.emirates.net.ae) by post.thorcom.com with esmtp (Exim 4.14) id 1AIkEq-0006p0-Rd for rsgb_lf_group@blacksheep.org; Sun, 09 Nov 2003 07:44:01 +0000 Received: from dpmail2.emirates.net.ae ([213.42.1.69]) by domail2.emirates.net.ae (I&ES Mail Server 4.2) with ESMTP id <0HO200J6ZQSH7B@domail2.emirates.net.ae> for rsgb_lf_group@blacksheep.org; Sun, 09 Nov 2003 11:43:29 +0400 (GST) X-Fake-Domain: ua6lfj Received: from ua6lfj (cha323.emirates.net.ae [217.164.193.69]) by dpmail2.emirates.net.ae (I&ES Mail Server 4.2) with SMTP id <0HO2003HZQSDN8@dpmail2.emirates.net.ae> for rsgb_lf_group@blacksheep.org; Sun, 09 Nov 2003 11:43:28 +0400 (GST) Date: Sun, 09 Nov 2003 11:46:12 +0400 From: "rv6lna" To: rsgb_lf_group@blacksheep.org X-Bad-Message-ID: no DNS (mshome.net) Message-ID: <002801c3a695$8c7ac5a0$0100a8c0@mshome.net> MIME-Version: 1.0 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Mailer: Microsoft Outlook Express 6.00.2720.3000 X-Priority: 3 X-MSMail-Priority: Normal Subject: LF: ru6la sigs. in UAE Content-Type: multipart/mixed; boundary="------------090200030700030108050203" X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_40_50,HTML_MESSAGE autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 This is a multi-part message in MIME format. --------------090200030700030108050203 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: 8bit
Hello group,
 
Please find attached ARGO screen shot taken last night
from 21-30 to 22-30 UTC on 135.9 kc.
I'm located in Ajman, United Arab Emirates.
Antenna - dipole for 80 m., 50m above the ground.
Radio - FT-817
Front end - 2-nd order BPF + 20 dB preamp.
Conditions are noisy (apartment building with a hundred
TVs and computers).
 
73!
Alexander
rv6lna
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Nov 2003 00:53:13 -0000 Content-Transfer-Encoding: 8bit X-Filtered-by: Plusnet (hmail v1.01) X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail01.services.quay.plus.net with SMTP; 12 Nov 2003 00:53:04 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AJjFK-0007Kc-Km for rsgb_lf_group-outgoing@blacksheep.org; Wed, 12 Nov 2003 00:52:34 +0000 Received: from [204.127.202.55] (helo=sccrmhc11.comcast.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AJjFJ-0007IW-SK for rsgb_lf_group@blacksheep.org; Wed, 12 Nov 2003 00:52:34 +0000 X-Fake-Domain: Charlie_Drake Received: from Charlie_Drake (pcp02166593pcs.lebnon01.pa.comcast.net[68.83.127.219]) by comcast.net (sccrmhc11) with SMTP id <2003111200515201100jfd04e>; Wed, 12 Nov 2003 00:51:52 +0000 From: "Steve Dove" To: rsgb_lf_group@blacksheep.org Date: Wed, 12 Nov 2003 00:51:59 -0000 X-Priority: 3 Organization: d s p In-reply-to: <5.1.0.14.0.20031111124203.029ea850@POP3.freeler.nl> X-Bad-Message-ID: no DNS (Charlie_Drake) Message-ID: <74WTPMFADBVTYXWU4ZB6NJC931LKKGHF.3fb1842f@Charlie_Drake> MIME-Version: 1.0 X-Mailer: Opera 6.04 build 1135 Subject: LF: 'Evaluating Receive Antennas using a Soundcard' Content-Type: text/plain; charset=windows-1252; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Greetings, Buckling under to overwhelming popular clamour (thanks, mum) a webbly-fied version of the talk from the RSGB HF Conference last week is at: http://www.w3eee.com under 'RSGB talk'. Cheers, Steve From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5014 invoked from network); 27 Nov 2003 16:31:12 -0000 Received: from netmail02.services.quay.plus.net (212.159.14.221) by mailstore with SMTP; 27 Nov 2003 16:31:12 -0000 Received: (qmail 8930 invoked by uid 10001); 27 Nov 2003 16:31:10 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 27 Nov 2003 16:29:28 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1APP04-00038r-Hm for rsgb_lf_group-outgoing@blacksheep.org; Thu, 27 Nov 2003 16:28:16 +0000 Received: from [144.254.74.5] (helo=ams-iport-1.cisco.com) by post.thorcom.com with esmtp (Exim 4.14) id 1APP03-00038a-La for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2003 16:28:15 +0000 Received: from virgin.net (144.254.74.60) by ams-iport-1.cisco.com with ESMTP; 27 Nov 2003 17:25:02 +0100 Received: from cisco.com (localhost [127.0.0.1]) by ams-msg-core-1.cisco.com (8.12.2/8.12.6) with ESMTP id hARGRUUh026095 for ; Thu, 27 Nov 2003 17:27:31 +0100 (MET) Received: from virgin.net (dhcp-rea-gp250-64-103-65-149.cisco.com [64.103.65.149]) by cisco.com (8.8.8/2.6/Cisco List Logging/8.8.8) with ESMTP id QAA19268 for ; Thu, 27 Nov 2003 16:27:41 GMT Message-ID: <3FC625FC.8020105@virgin.net> Date: Thu, 27 Nov 2003 16:27:40 +0000 From: "Stewart Bryant" User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: Ephemeral day Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Tomorrow may never come, but the day after tomorrow arrives at midnight :) http://www.motorola.com/ies/GPS/docs_pdf/notification_oncore.pdf 73 Stewart G3YSX From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11216 invoked from network); 20 Nov 2003 22:44:48 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by mailstore with SMTP; 20 Nov 2003 22:44:48 -0000 Received: (qmail 11684 invoked from network); 20 Nov 2003 22:44:55 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by warrior.services.quay.plus.net with SMTP; 20 Nov 2003 22:44:51 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AMxRH-0004WJ-F9 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 20 Nov 2003 22:38:15 +0000 Received: from [212.23.8.70] (helo=heisenberg.zen.co.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1AMxRH-0004WA-1y for rsgb_lf_group@blacksheep.org; Thu, 20 Nov 2003 22:38:15 +0000 Received: from 82-68-48-134.dsl.in-addr.zen.co.uk ([82.68.48.134] helo=virgin.net) by heisenberg.zen.co.uk with esmtp (Exim 4.22) id 1AMxRG-0001yt-D4 for rsgb_lf_group@blacksheep.org; Thu, 20 Nov 2003 22:38:14 +0000 Message-ID: <3FBD4255.50801@virgin.net> Date: Thu, 20 Nov 2003 22:38:13 +0000 From: "Stewart Bryant" User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <000601c3aee7$723ec2e0$2bc428c3@erica> In-reply-to: <000601c3aee7$723ec2e0$2bc428c3@erica> X-Originating-Heisenberg-IP: [82.68.48.134] Subject: Re: LF: CT1/G3KEV Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Laptops are fine in the Xray. Mine has been thoroughly irradiated. If you travel to the US you will have no choice. The Laptop has to go through separately, so do your shoes. Over there the detectors are all at hyper-sensitive level. On my trip last week I also put my watch, glasses, belt and coins through the Xray, and still got a full search due to a single 1c coin in my handkerchief. 73 Stewart g3ldo wrote: > Dave, G0MRF said: > > >>I find that the X-ray machines hate the solid metal base of some morse > > keys. > >>Apparently the density of block of Semtex has a similar effect on >>the image displayed on the security monitors. > > > Can these machines tell the difference between a metal box of components, > such as a rig, ATU or PSU and a solid block of a CW key? > I was more concerned about weight (as the XYL seemed to want to pack her > entire wardrobe) so I used a lightweight CW paddle that was fixed to a > clipboard that contained all the amateur radio papers. > I put all my ham radio gear into a separate small case which I never saw > again until it reluctantly appeared at baggage reclaim. I carried my laptop > and antenna mast (fibre glass telescopic roach pole, used as a walking > stick) as hand luggage. I specifically asked that the laptop didn't go > through the xray machine so that was the only item that got looked at. > > Peter G3LDO > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2459 invoked from network); 11 Nov 2003 21:13:36 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 11 Nov 2003 21:13:36 -0000 Received: (qmail 2499 invoked from network); 11 Nov 2003 21:13:36 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 11 Nov 2003 21:13:29 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AJfoW-0003zW-RG for rsgb_lf_group-outgoing@blacksheep.org; Tue, 11 Nov 2003 21:12:40 +0000 Received: from [171.68.10.86] (helo=sj-iport-4.cisco.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AJfoW-0003zL-26 for rsgb_lf_group@blacksheep.org; Tue, 11 Nov 2003 21:12:40 +0000 Received: from cisco.com (localhost [127.0.0.1]) by ams-msg-core-1.cisco.com (8.12.2/8.12.6) with ESMTP id hABLBuGd018565 for ; Tue, 11 Nov 2003 22:11:56 +0100 (MET) Received: from virgin.net (sjc-vpn2-133.cisco.com [10.21.112.133]) by cisco.com (8.8.8/2.6/Cisco List Logging/8.8.8) with ESMTP id VAA20242 for ; Tue, 11 Nov 2003 21:12:04 GMT Message-ID: <3FB150A2.1020407@virgin.net> Date: Tue, 11 Nov 2003 21:12:02 +0000 From: "Stewart Bryant" User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <19d.1ca91b53.2cdcf1ce@aol.com> <01ce01c3a895$53649500$ac2465d5@oemcomputer> In-reply-to: <01ce01c3a895$53649500$ac2465d5@oemcomputer> Subject: Re: LF: Re: Dummy loads at LF Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 When I was a PhD student we used to make high power resistors to terminate very large pulse generators from PVC tube filled with copper sulphate and with brass end plugs. By varying the size of the resistor and the concentration of the copper sulphate we could get the value we wanted. I can't remember how powerful these generators were (not my project), but they ranged from the size of a small van to a very large lorry :) Interestingly the high frequency performance of these resistors was not a problem. A quick check on Google pointed me to this design info: http://www.kronjaeger.com/hv/hv/comp/res/ (It's actually interesting to also look at the top level page) http://www.samtech.co.uk/PDF%20files/liquid%20res.pdf 73 Stewart Johan Bodin wrote: > Dear group, > > at a wavelength of 2200m I can't see any reason why a bucket of > salt water can't be used as a "poor man's dummy load". Also, > water needs a lot of energy to heat up. At 4.18 kJ/(kg*K) a 10 liter > bucket will take a kWh, or so, before reaching the boiling point... :-) > > By the way, the speed (frequency) control system at SAQ contains > servo controlled "liquid rheostats". > > Any ideas for electrode material? > > 73 > > Johan SM6LKM > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14932 invoked from network); 24 Nov 2003 15:21:33 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 24 Nov 2003 15:21:33 -0000 Received: (qmail 22422 invoked from network); 24 Nov 2003 15:21:32 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 24 Nov 2003 15:21:25 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOITE-0004NU-3M for rsgb_lf_group-outgoing@blacksheep.org; Mon, 24 Nov 2003 15:17:48 +0000 Received: from [165.254.4.18] (helo=mail.mcf.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AOITC-0004NL-Dx for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 15:17:46 +0000 X-Fake-Domain: vaiosn Received: from vaiosn (210.155.48.21) by mail.mcf.com with ESMTP (Eudora Internet Mail Server 3.2.2) for ; Mon, 24 Nov 2003 10:17:46 -0500 X-Bad-Message-ID: no DNS (vaiosn) Message-ID: <014401c3b29e$1babb2c0$15309bd2@vaiosn> From: "Stewart Nelson" To: rsgb_lf_group@blacksheep.org References: Date: Mon, 24 Nov 2003 07:17:40 -0800 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2720.3000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: Re: LF: PA0SE Field Srength Meter for 137 kHz Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=HTML_MESSAGE autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Hi Eric and all, Dick's post, made with Eudora, contained this HTML fragment: The correct formula is:

P = 0.0111(E *d)2 in which ... Depending on your mail reader and/or browser, the superscript 2 may not have displayed correctly. The correct formula is: P = 0.0111 * (E * d) ** 2 or P equals 0.0111 times ((E times d) squared) Hope this is clear. 73, Stewart ----- Original Message ----- From: "Eric KD5UWL" To: "LF-Group" Sent: Monday, November 24, 2003 6:44 AM Subject: Re: LF: PA0SE Field Srength Meter for 137 kHz > On Mon, 24 Nov 2003, Dick Rollema wrote: > > > produces a certain field strength is wrongly given as > > P = 0.0111(E * d)2. > > > > The correct formula is: > > > > P = 0.0111(E *d)2 in which: > > Hi, Dick, > > Sorry -- I don't see the difference. Did you include the wrong one? > > 73 > Eric > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23922 invoked from network); 19 Nov 2003 17:39:03 -0000 Received: from unknown (HELO murphys.services.quay.plus.net) (212.159.14.225) by mailstore with SMTP; 19 Nov 2003 17:39:03 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: (qmail 21513 invoked from network); 19 Nov 2003 17:38:54 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by murphys.services.quay.plus.net with SMTP; 19 Nov 2003 17:38:46 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AMWGa-0000wY-EI for rsgb_lf_group-outgoing@blacksheep.org; Wed, 19 Nov 2003 17:37:24 +0000 Received: from [194.217.242.88] (helo=anchor-post-30.mail.demon.net) by post.thorcom.com with esmtp (Exim 4.14) id 1AMWGa-0000wP-1i for rsgb_lf_group@blacksheep.org; Wed, 19 Nov 2003 17:37:24 +0000 Received: from telemetry.demon.co.uk ([194.222.19.114]) by anchor-post-30.mail.demon.net with esmtp (Exim 3.35 #1) id 1AMWGZ-000B6j-0U for rsgb_lf_group@blacksheep.org; Wed, 19 Nov 2003 17:37:23 +0000 Message-ID: Date: Wed, 19 Nov 2003 17:16:57 +0000 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" In-reply-to: <000d01c3aeb3$ea2cf620$fec828c3@bryan2> MIME-Version: 1.0 X-Mailer: Turnpike Version 3.03a Subject: Re: LF: OFF TOPIC but radio. X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Brian Not sure I understand the problem because the sidetone on mine is roughly the same volume as incoming signals. i.e. When receiving quietly so as not to disturb my neighbours in the flat next door at my /A location, the sidetone is also quiet. I wonder if there is a pot to balance the two levels? 73, Tom G3OLB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13623 invoked from network); 23 Nov 2003 19:24:36 -0000 Received: from unknown (HELO marstons.services.quay.plus.net) (212.159.14.223) by mailstore with SMTP; 23 Nov 2003 19:24:36 -0000 Received: (qmail 28100 invoked by uid 10001); 23 Nov 2003 19:24:33 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by marstons.services.quay.plus.net with SMTP; 23 Nov 2003 19:24:13 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ANzlx-0003aW-Ty for rsgb_lf_group-outgoing@blacksheep.org; Sun, 23 Nov 2003 19:19:53 +0000 Received: from [212.78.194.171] (helo=smtp01.spray.se) by post.thorcom.com with esmtp (Exim 4.14) id 1ANzlx-0003aN-2e for rsgb_lf_group@blacksheep.org; Sun, 23 Nov 2003 19:19:53 +0000 X-Fake-Domain: urban Received: from urban (t7o940p82.telia.com [212.181.199.82]) by smtp01.spray.se (Postfix) with SMTP id D564F7319D for ; Sun, 23 Nov 2003 21:19:05 +0100 (CET) X-Bad-Message-ID: no DNS (ekholm) Message-ID: <000d01c3b1f6$84ab5d00$52c7b5d4@ekholm> From: "Urban Ekholm" To: rsgb_lf_group@blacksheep.org Date: Sun, 23 Nov 2003 20:18:02 +0100 MIME-Version: 1.0 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 Subject: LF: JASON anyone ? Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.1 required=5.0 tests=HTML_60_70,HTML_MESSAGE autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Content-transfer-encoding: 8bit
Hello !
 
Is anyone interested in trying a QSO on JASON ?
 
If so, mail me at : urban.ekholm@hem-pc.bip.net so we could arrange a sked some weekend.
 
73 SM5EUF Urban
 
JO78SQ
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 27063 invoked from network); 27 Nov 2003 09:28:53 -0000 Received: from netmail02.services.quay.plus.net (212.159.14.221) by mailstore with SMTP; 27 Nov 2003 09:28:53 -0000 Received: (qmail 8248 invoked by uid 10001); 27 Nov 2003 09:28:52 -0000 Content-Transfer-Encoding: 8bit X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-Priority: 3 X-MSMail-Priority: Normal Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 27 Nov 2003 09:27:21 -0000 X-Fake-Domain: majordom X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1APIQ6-0004us-RG for rsgb_lf_group-outgoing@blacksheep.org; Thu, 27 Nov 2003 09:26:42 +0000 Received: from [194.25.108.14] (helo=mail.mvnet.de) by post.thorcom.com with esmtp (Exim 4.14) id 1APIQ5-0004tm-Tq for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2003 09:26:42 +0000 Received: from gtwf.mvnet.de (gtwf.mvnet.de [194.25.108.83]) by mail.mvnet.de (8.12.10/) with ESMTP id hAR9QFQn023888 for ; Thu, 27 Nov 2003 10:26:15 +0100 X-Fake-Domain: falkenuge02.mvnet.de Received: from falkenuge02.mvnet.de (gtwf-mgw.mvnet.de [192.168.0.3]) by gtwf.mvnet.de (8.12.10/) with SMTP id hAR9Q6cZ024632 for ; Thu, 27 Nov 2003 10:26:06 +0100 X-Fake-Domain: no.name.available Received: from no.name.available by falkenuge02.mvnet.de via smtpd (for [192.168.0.10]) with SMTP; 27 Nov 2003 09:26:06 UT X-Fake-Domain: waechter.cn.mv-regierung.de Received: from waechter.cn.mv-regierung.de ([10.10.0.6]) by mgwl01.mgw.mvnet.de (8.12.10/) with SMTP id hAR9Q1CZ023543 for ; Thu, 27 Nov 2003 10:26:06 +0100 X-No-DNS-For: 194.1.2.8 Received: from [194.1.2.8] by adlerauge-11.mvnet.de via smtpd (for [10.254.1.10]) with SMTP; 27 Nov 2003 09:24:30 UT Received: by UMNT02 with Internet Mail Service (5.5.2650.21) id ; Thu, 27 Nov 2003 10:26:01 +0100 X-Bad-Message-ID: no DNS (UMNT02) Message-ID: From: v.wedelstaedt@um.mv-regierung.de To: rsgb_lf_group@blacksheep.org Date: Thu, 27 Nov 2003 10:25:53 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) Subject: LF: AW: Newbie question Content-Type: text/plain; charset=iso-8859-1; format=flowed X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Hi Martyn in my case it was the notebook-charger 73 Eberhard, DL3ZID ============================================================================ Hi folks, I have been monitoring 137 for a couple of weeks now, but for the last week or so I have been getting this consistent 1 second broadband (from about 133khz to about 139khz pulse. see attached jpg. Is this typical? or better still can anyone suggest what it might be please? DCF39 is clear on the trace and very strong.. Even better, can I get rid of it. The next step is probably a noise canceller but I'm not sure how effective this will be on a broadband noise pulse Ant is a dual vertical wire to approx 10m high with a pair of 18m horizontal Capacity wires seperated by abt 800mm in an offset 'T' formation. Looding coil is about 5mH. Rx pre-amplifier is the Mk1 G0MRF kit feeding my FT-920 HF rig. Thanks Martyn From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9582 invoked from network); 24 Nov 2003 11:15:30 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 24 Nov 2003 11:15:30 -0000 Received: (qmail 28936 invoked from network); 24 Nov 2003 11:15:29 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 24 Nov 2003 11:15:23 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOEek-0000LK-Vz for rsgb_lf_group-outgoing@blacksheep.org; Mon, 24 Nov 2003 11:13:26 +0000 Received: from [195.224.180.233] (helo=olympus.pncl.co.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1AOEek-0000LB-5q for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 11:13:26 +0000 X-Fake-Domain: k7t Received: from k7t (71.25.153.194.dial.cix.gxn.net [194.153.25.71]) by olympus.pncl.co.uk (8.12.9/8.12.7) with SMTP id hAOBDN4Q029272 for ; Mon, 24 Nov 2003 11:13:23 GMT X-Bad-Message-ID: no DNS (k7t) Message-ID: <000501c3b27c$367a9d40$471999c2@k7t> From: "Walter Blanchard" To: rsgb_lf_group@blacksheep.org Date: Mon, 24 Nov 2003 11:14:33 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-MailScanner-Information: Please contact the ISP for more information X-MailScanner: Not scanned: please contact your Internet E-Mail Service Provider for details X-MailScanner-SpamCheck: not spam, SpamAssassin (score=0, required 4.5) Subject: LF: Broadband QRM Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Have any of you G's installed BT's Home Network 1200 broad-band system? If so, did it cause any QRM, LF or otherwise? I want to network 3 computers and two phones so it seems I need their 1200 modem plus two microfilters and two PC adaptors. If I've got it right one cptr goes straight to their modem while the other two connect via USB to the two "adaptors". The two phones go via microfilters. The line runs at 512 kB (apparently) but it's all interconnected over the usual BT unshielded 4-wire line inside the house so what about LF radiation? I know this came up some time ago but I've lost the emails. Sorry. Walter G3JKV. --- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.543 / Virus Database: 337 - Release Date: 21/11/03 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12717 invoked from network); 18 Nov 2003 15:59:16 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 18 Nov 2003 15:59:16 -0000 Received: (qmail 21888 invoked from network); 18 Nov 2003 15:59:15 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 18 Nov 2003 15:59:06 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AM8D6-0001O6-7D for rsgb_lf_group-outgoing@blacksheep.org; Tue, 18 Nov 2003 15:56:12 +0000 Received: from [195.224.180.233] (helo=olympus.pncl.co.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1AM8D5-0001Nt-Eo for rsgb_lf_group@blacksheep.org; Tue, 18 Nov 2003 15:56:11 +0000 X-Fake-Domain: k7t Received: from k7t (110.25.153.194.dial.cix.gxn.net [194.153.25.110]) by olympus.pncl.co.uk (8.12.9/8.12.7) with SMTP id hAIFtXwq018489 for ; Tue, 18 Nov 2003 15:55:34 GMT X-Bad-Message-ID: no DNS (k7t) Message-ID: <002001c3adec$96036d80$6e1999c2@k7t> From: "Walter Blanchard" To: rsgb_lf_group@blacksheep.org References: <009801c3adcf$cf79b000$9fe486d4@bryan2> Date: Tue, 18 Nov 2003 15:56:17 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-MailScanner-Information: Please contact the ISP for more information X-MailScanner: Not scanned: please contact your Internet E-Mail Service Provider for details X-MailScanner-SpamCheck: not spam, SpamAssassin (score=0, required 4.5) Subject: LF: Freq wobble Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 I've seen similar wobbles in GPS-disciplined standards. The fundamental gradually drifts off then the GPS software algorithm slowly pulls them back in again. How often and how far depends on the programming. Lots of them in use now. There are four on the cellphone transmitter site next to me - amusing watching their harmonics on 144.000 000 MHz wandering back and forth. Walter G3JKV. --- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.525 / Virus Database: 322 - Release Date: 09/10/03 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19409 invoked from network); 11 Nov 2003 20:57:27 -0000 Received: from netmail01.services.quay.plus.net (212.159.14.219) by mailstore with SMTP; 11 Nov 2003 20:57:27 -0000 Received: (qmail 481 invoked by uid 10001); 11 Nov 2003 20:57:26 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail01.services.quay.plus.net with SMTP; 11 Nov 2003 20:57:12 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AJfYx-0003pQ-MH for rsgb_lf_group-outgoing@blacksheep.org; Tue, 11 Nov 2003 20:56:35 +0000 Received: from [195.224.180.233] (helo=olympus.pncl.co.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1AJfYx-0003pH-1k for rsgb_lf_group@blacksheep.org; Tue, 11 Nov 2003 20:56:35 +0000 X-Fake-Domain: k7t Received: from k7t (20.24.153.194.dial.cix.gxn.net [194.153.24.20]) by olympus.pncl.co.uk (8.12.9/8.12.7) with SMTP id hABKuMT8029214 for ; Tue, 11 Nov 2003 20:56:23 GMT X-Bad-Message-ID: no DNS (k7t) Message-ID: <002c01c3a896$64c504a0$141899c2@k7t> From: "Walter Blanchard" To: rsgb_lf_group@blacksheep.org References: <200311111621.hABGL1Q21253@mailgate5.cinetic.de> Date: Tue, 11 Nov 2003 20:57:10 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-MailScanner-Information: Please contact the ISP for more information X-MailScanner: Not scanned: please contact your Internet E-Mail Service Provider for details X-MailScanner-SpamCheck: not spam, SpamAssassin (score=0.475, required 5,HTML_40_50 0.47, HTML_MESSAGE 0.00) Subject: Re: LF: Dummy-Load on LW Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_40_50,HTML_MESSAGE autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Content-transfer-encoding: 8bit
DK8ND's email raises an interesting point. Can any of our German friends tell me why an impedance of 60 ohms was popular in Germany for some time but not anywhere else?
 
Walter G3JKV.
 
 
 

---
 
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.525 / Virus Database: 322 - Release Date: 09/10/03
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 30358 invoked from network); 24 Nov 2003 19:15:10 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 24 Nov 2003 19:15:10 -0000 Received: (qmail 26843 invoked by uid 10001); 24 Nov 2003 19:15:09 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 24 Nov 2003 19:14:35 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AOM69-000874-1a for rsgb_lf_group-outgoing@blacksheep.org; Mon, 24 Nov 2003 19:10:13 +0000 Received: from [64.12.136.163] (helo=imo-m08.mx.aol.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AOM68-000861-CX for rsgb_lf_group@blacksheep.org; Mon, 24 Nov 2003 19:10:12 +0000 X-Fake-Domain: WarmSpgs@aol.com Received: from WarmSpgs@aol.com by imo-m08.mx.aol.com (mail_out_v36_r1.1.) id l.12d.357b7d9a (3850) for ; Mon, 24 Nov 2003 14:09:35 -0500 (EST) From: WarmSpgs@aol.com Message-ID: <12d.357b7d9a.2cf3b16f@aol.com> Date: Mon, 24 Nov 2003 14:09:35 EST To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: AOL 4.0 for Windows 95 sub 120 Subject: Re: LF: Start rsgb_lf_group? Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 In a message dated 11/24/03 10:44:48 AM Eastern Standard Time, ed@dx.ru writes: > When in USA have permitted beacons 1w and a 15 meter antenna under FCC > part 15 (160-190kHz)? This happened about 50 years ago, although I do not remember the precise year. John From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11299 invoked from network); 22 Nov 2003 03:50:28 -0000 Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 22 Nov 2003 03:50:28 -0000 Received: (qmail 15281 invoked from network); 22 Nov 2003 03:50:34 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by warrior.services.quay.plus.net with SMTP; 22 Nov 2003 03:50:29 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ANOj0-0003El-Ip for rsgb_lf_group-outgoing@blacksheep.org; Sat, 22 Nov 2003 03:46:22 +0000 Received: from [152.163.225.104] (helo=imo-r08.mx.aol.com) by post.thorcom.com with esmtp (Exim 4.14) id 1ANOiz-0003Ea-NB for rsgb_lf_group@blacksheep.org; Sat, 22 Nov 2003 03:46:21 +0000 X-Fake-Domain: WarmSpgs@aol.com Received: from WarmSpgs@aol.com by imo-r08.mx.aol.com (mail_out_v36_r1.1.) id l.103.39d4f9b8 (18555) for ; Fri, 21 Nov 2003 22:45:47 -0500 (EST) From: WarmSpgs@aol.com Message-ID: <103.39d4f9b8.2cf035eb@aol.com> Date: Fri, 21 Nov 2003 22:45:47 EST To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: AOL 4.0 for Windows 95 sub 120 Subject: Re: LF: Beacons stays on Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 In a message dated 11/21/03 4:24:05 PM Eastern Standard Time, eric@willow.nutstreet.net writes: > Excuse me, but it's not so bad here. No, not bad at all. I spent many happy years in that region as a youngster. It's just a bit of a change from Anchorage, for certain. > There ARE mountains in the distance. > They are just so far in the distance you can't see them :) Yes, I've got to remember "distance" has a somewhat expanded meaning on the Plains; as illustrated in the story about the two Texans who were trying to outdo each other bragging about the size of their ranches. One boasted, "I can climb in my pickup truck first thing in the morning, drive and drive all day, and not reach the other side of my spread by nightfall." The other one said, "Yep. I used to have a truck like that, too." John From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14910 invoked from network); 21 Nov 2003 21:06:58 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by mailstore with SMTP; 21 Nov 2003 21:06:58 -0000 Received: (qmail 8786 invoked from network); 21 Nov 2003 21:07:04 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by warrior.services.quay.plus.net with SMTP; 21 Nov 2003 21:06:59 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ANITM-0005ud-BX for rsgb_lf_group-outgoing@blacksheep.org; Fri, 21 Nov 2003 21:05:48 +0000 Received: from [205.188.157.37] (helo=imo-d05.mx.aol.com) by post.thorcom.com with esmtp (Exim 4.14) id 1ANITL-0005uU-Ke for rsgb_lf_group@blacksheep.org; Fri, 21 Nov 2003 21:05:47 +0000 X-Fake-Domain: WarmSpgs@aol.com Received: from WarmSpgs@aol.com by imo-d05.mx.aol.com (mail_out_v36_r1.1.) id l.158.281cc530 (30960) for ; Fri, 21 Nov 2003 16:05:10 -0500 (EST) From: WarmSpgs@aol.com Message-ID: <158.281cc530.2cefd805@aol.com> Date: Fri, 21 Nov 2003 16:05:09 EST To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: AOL 4.0 for Windows 95 sub 120 Subject: Re: LF: Beacons stays on Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 In a message dated 11/21/03 1:23:41 PM Eastern Standard Time, hellozerohellozero@hotmail.com writes: > it is > confirmed that it and me/Sheri are being moved close to the SE Kansas/NE > Oklahoma Border in January sometime. The relocation will remove you from all that fun with transpolar propagation, but at least you stand a good chance of being in soil conductivities of 15-30 mS/m, if you don't get wedged into the extreme corner of either state (too near Missouri). Moose will be replaced with white tail deer, so far as the wildlife pests go, and you'll want to watchful for snakes a bit more of the year. No mountains in the distance, no midnight sun, but once tornado season is over you'll be able to keep the antenna up and radiating more efficiently than ever. John From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11733 invoked from network); 5 Nov 2003 01:07:24 -0000 Received: from unknown (HELO netmail01.services.quay.plus.net) (212.159.14.219) by mailstore with SMTP; 5 Nov 2003 01:07:24 -0000 Received: (qmail 10905 invoked by uid 10001); 5 Nov 2003 01:07:24 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail01.services.quay.plus.net with SMTP; 5 Nov 2003 01:07:11 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AHC7w-0006hT-BM for rsgb_lf_group-outgoing@blacksheep.org; Wed, 05 Nov 2003 01:06:28 +0000 Received: from [152.163.225.102] (helo=imo-r06.mx.aol.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AHC7v-0006hK-L4 for rsgb_lf_group@blacksheep.org; Wed, 05 Nov 2003 01:06:27 +0000 X-Fake-Domain: WarmSpgs@aol.com Received: from WarmSpgs@aol.com by imo-r06.mx.aol.com (mail_out_v36_r1.1.) id l.2f.410c6ecc (4238) for ; Tue, 4 Nov 2003 20:05:50 -0500 (EST) From: WarmSpgs@aol.com Message-ID: <2f.410c6ecc.2cd9a6ee@aol.com> Date: Tue, 4 Nov 2003 20:05:50 EST To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: AOL 4.0 for Windows 95 sub 120 Subject: Re: LF: Unusual QRM Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Perhaps that should be QRaM ? From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 25196 invoked from network); 1 Nov 2003 04:21:53 -0000 Received: from unknown (HELO marstons.services.quay.plus.net) (212.159.14.223) by mailstore with SMTP; 1 Nov 2003 04:21:53 -0000 Received: (qmail 17515 invoked by uid 10001); 1 Nov 2003 04:21:53 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by marstons.services.quay.plus.net with SMTP; 1 Nov 2003 04:21:31 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AFnCF-0000GR-SQ for rsgb_lf_group-outgoing@blacksheep.org; Sat, 01 Nov 2003 04:17:07 +0000 Received: from [64.12.136.6] (helo=imo-m03.mx.aol.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AFnCE-0000DK-Vs for rsgb_lf_group@blacksheep.org; Sat, 01 Nov 2003 04:17:07 +0000 X-Fake-Domain: WarmSpgs@aol.com Received: from WarmSpgs@aol.com by imo-m03.mx.aol.com (mail_out_v36_r1.1.) id l.120.269c4e62 (16781) for ; Fri, 31 Oct 2003 23:16:33 -0500 (EST) From: WarmSpgs@aol.com Message-ID: <120.269c4e62.2cd48da1@aol.com> Date: Fri, 31 Oct 2003 23:16:33 EST To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: AOL 4.0 for Windows 95 sub 120 Subject: Re: LF: RE: Solar Activity Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 In a message dated 10/31/03 12:47:15 PM Eastern Standard Time, J.R.Moritz@herts.ac.uk writes: > But > somewhat surprisingly, I had quite good M-to-O copy from VO1NA between > about 0600 and some time after 0800 this morning. Excellent news. I am possibly a little more optimistic than Alan about a timely decay of ionisation levels, if we can just have fewer X-rays and protons for a while. John From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9522 invoked from network); 22 Nov 2003 15:37:06 -0000 Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 22 Nov 2003 15:37:06 -0000 Received: (qmail 21144 invoked from network); 22 Nov 2003 15:37:13 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by warrior.services.quay.plus.net with SMTP; 22 Nov 2003 15:37:07 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ANZk9-0004XM-CR for rsgb_lf_group-outgoing@blacksheep.org; Sat, 22 Nov 2003 15:32:17 +0000 Received: from [63.171.43.2] (helo=ns2.genesis-technology.com) by post.thorcom.com with esmtp (Exim 4.14) id 1ANZk4-0004XD-3j for rsgb_lf_group@blacksheep.org; Sat, 22 Nov 2003 15:32:12 +0000 X-Fake-Domain: we0h Received: from we0h ([65.165.20.192]) by ns2.genesis-technology.com (8.10.2/8.10.2) with SMTP id hAMFWA614214 for ; Sat, 22 Nov 2003 09:32:10 -0600 From: "WE0H" To: rsgb_lf_group@blacksheep.org Date: Sat, 22 Nov 2003 09:36:21 -0600 Message-ID: MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 In-reply-to: Importance: Normal Subject: RE: LF: Beacons stays on Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 I just told Laurence to build a concrete room underground so he and the misses could hide out in a safe place during those tornadoes. Mike>WE0H http://www.we0h.us/lf "WEOH" on 185.3026kc QRSS 30 & -.-. .-- FCC says 'Sufficiently powered @ 1w' -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Eric KD5UWL Sent: Friday, November 21, 2003 3:23 PM To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Beacons stays on > > it is > > confirmed that it and me/Sheri are being moved close to the SE Kansas/NE > > Oklahoma Border in January sometime. > ...No mountains in the distance, no midnight sun, but once tornado Excuse me, but it's not so bad here. There ARE mountains in the distance. They are just so far in the distance you can't see them :) 73 Eric EM25