Return-Path: Received: (qmail 1817 invoked from network); 8 Jan 2003 15:52:06 -0000 Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 8 Jan 2003 15:52:06 -0000 Received: (qmail 15159 invoked from network); 8 Jan 2003 15:52:02 -0000 Content-Transfer-Encoding: 8bit Received: from post.thorcom.com (193.82.116.70) by warrior.services.quay.plus.net with SMTP; 8 Jan 2003 15:52:02 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.12) id 18WITy-0001Ir-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 08 Jan 2003 15:51:06 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [147.197.200.9] (helo=hestia.herts.ac.uk) by post.thorcom.com with esmtp (Exim 4.12) id 18WITx-0001Ii-00 for rsgb_lf_group@blacksheep.org; Wed, 08 Jan 2003 15:51:05 +0000 Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 18WIRr-0006t1-00 for rsgb_lf_group@blacksheep.org; Wed, 08 Jan 2003 15:48:55 +0000 Received: from [147.197.232.252] (helo=rsch-15.herts.ac.uk) by gemini.herts.ac.uk with esmtp (Exim 3.33 #1) id 18WIRp-0000cw-00 for rsgb_lf_group@blacksheep.org; Wed, 08 Jan 2003 15:48:53 +0000 Message-ID: <5.1.0.14.0.20030108150626.02478440@gemini.herts.ac.uk> X-Sender: mj9ar@gemini.herts.ac.uk X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Wed, 08 Jan 2003 15:47:05 +0000 To: rsgb_lf_group@blacksheep.org From: "James Moritz" In-reply-to: MIME-Version: 1.0 X-MailScanner: No Virus detected Subject: Re: LF: 137Khz Content-Type: text/plain; charset=us-ascii; format=flowed X-Spam-Status: No, hits=-2.3 required=6.0tests=DEAR_SOMEBODY,EMAIL_ATTRIBUTION,IN_REP_TO, QUOTED_EMAIL_TEXT,SPAM_PHRASE_00_01version=2.43 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 Dear Lawrence, LF Group, At 11:45 30/12/2002 -0900, you wrote: > From Laurence aka Flo AL1V (G4DMA) BP41xd 10Kms SW Anchorage Alaska. > >Hi Im now QRV on Rx on this band using Argo 131 > >The 138.8Khz Eu beacon signal is audible to S9+ in the mornings before >2030Z and from 2300Z. (It is very variable on a minute to min basis) > >Long wave stations are even audible thru my winter dayliight hours with >France Inter on 162 and others on 153 sometimes HI quality. BBC R4 is >never strong and is very close to the local US NDB's > >If we take this as a good indicator of band conditions,Id be interested to >know how strong this beacon is being received on the Eastern states at the >time that Eu stations are audible...there may be a chance..we are about >6000Kms from the UK. Nice to have another part of the world to aim at.... DCF39 on 138.83k has about 40kW ERP, so will be roughly 50dB up on most amateur signals of somewhat less than 1W ERP. So if DCF39 gives about 20-30dB SNR in a few hundred Hz CW bandwidth, it should be possible to copy European signals using QRSS signals with small fractions of a Hz bandwidth. Of course, what that translates to on the S meter depends very much on that particular meter! W4DEX has received several European signals over a similar distance, but a somewhat different path, so I guess Alaska should be quite feasible >The path to Europe tends to cross a large cross section of the Au Oval but >whether this is going to make a large difference to prop unless under >extreme proton events I dont know. It would certainly be interesting to see what the difference is in propagation to Alaska compared to other parts of the USA - As well as that, I would expect you will get considerably less thunderstorm QRN than in the more southern states, which would certainly help reception. Wishing you good luck on LF, Cheers, Jim Moritz 73 de M0BMU