Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mc02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 9621538000098; Tue, 27 Nov 2012 16:31:55 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1TdSk2-0007In-CQ for rs_out_1@blacksheep.org; Tue, 27 Nov 2012 21:30:54 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1TdSk1-0007Ie-Ne for rsgb_lf_group@blacksheep.org; Tue, 27 Nov 2012 21:30:53 +0000 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1TdSjy-0008Ci-Ni for rsgb_lf_group@blacksheep.org; Tue, 27 Nov 2012 21:30:52 +0000 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id qARLUnMc015314 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 27 Nov 2012 22:30:49 +0100 Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de [129.206.22.206]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id qARLUnVo011558 for ; Tue, 27 Nov 2012 22:30:49 +0100 Message-ID: <50B53103.1030505@iup.uni-heidelberg.de> Date: Tue, 27 Nov 2012 22:30:43 +0100 From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <8CDDC896504242CB8DDE22806560D8EF@GaryAsus> <1FE4925B2A914EFC95A3EB6AE4638594@GaryAsus> In-Reply-To: <1FE4925B2A914EFC95A3EB6AE4638594@GaryAsus> X-Spam-Score: -2.7 (--) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hi Gary, What type of RX antenna are you using? Is it passive or active? 73, Stefan/DK7FC [...] Content analysis details: (-2.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [129.206.210.211 listed in list.dnswl.org] -0.4 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: 18c242620d7d7b91a1caf5740aa3e326 Subject: Re: LF: Re: LF interference Content-Type: multipart/alternative; boundary="------------060306000000010701070305" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.2 required=5.0 tests=HTML_50_60,HTML_MESSAGE autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G x-aol-sid: 3039ac1d604a50b5314b5d09 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. --------------060306000000010701070305 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Hi Gary, What type of RX antenna are you using? Is it passive or active? 73, Stefan/DK7FC Am 27.11.2012 21:56, schrieb Gary - G4WGT: > Hi All, > The interference has just stopped as suddenly as it started. > https://www.dropbox.com/s/zz8fgh0hr79ytr8/137700Hz-1211272049.jpg > 73, > Gary - G4WGT. > > ----- Original Message ----- > *From:* Gary - G4WGT > *To:* LF Group ; > rsgb_lf_group@yahoogroups.co.uk > > *Sent:* Tuesday, November 27, 2012 8:41 PM > *Subject:* LF: LF interference > > Hi All, > For about 7 days or so I have been getting some very strong > interference on the 136kHz band. At first it only came on for > short periods (up to 1 or 2 hours) but from yesterday it came on > early evening & stayed until early today & is there again tonight. > The interfering signal sounds like a buzzing noise on my LF Rx & > the visual display shows a very unstable form. It starts from > about 137.000kHz upwards & fades towards 145kHz. > I have placed 3 captures on Dropbox, 2 SpecLab (showing the start > time) & 1 HDSDR showing the extent of the interference. > https://www.dropbox.com/s/fhx3daelhpf9mn5/137700Hz-1211262130.jpg > https://www.dropbox.com/s/ip7s3gdnn8uyned/137700Hz-1211271830.jpg > https://www.dropbox.com/s/r51adwp0avx75x0/HDSDR%20Waterfall.jpg > If anyone can identify this type of interference I would be > pleased for comments. I believe I have eliminated all my own gear > & household items. > Thanks & 73, > Gary - G4WGT. > --------------060306000000010701070305 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Hi Gary,

What type of RX antenna are you using? Is it passive or active?

73, Stefan/DK7FC

Am 27.11.2012 21:56, schrieb Gary - G4WGT:
Hi All,
 
The interference has just stopped as suddenly as it started.
 
 
73,
 
Gary - G4WGT.
 
----- Original Message -----
Sent: Tuesday, November 27, 2012 8:41 PM
Subject: LF: LF interference

Hi All,
 
For about 7 days or so I have been getting some very strong interference on the 136kHz band. At first it only came on for short periods (up to 1 or 2 hours) but from yesterday it came on early evening & stayed until early today & is there again tonight.
 
The interfering signal sounds like a buzzing noise on my LF Rx & the visual display shows a very unstable form. It starts from about 137.000kHz upwards & fades towards 145kHz.
 
I have placed 3 captures on Dropbox, 2 SpecLab (showing the start time) & 1 HDSDR showing the extent of the interference.
 
 
If anyone can identify this type of interference I would be pleased for comments. I believe I have eliminated all my own gear & household items.
 
Thanks & 73,
 
Gary - G4WGT.
 
 
 
 
 
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