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 >