Return-Path: <majordom@post.thorcom.com>
Received: (qmail 27344 invoked from network); 16 May 2002 11:36:55 -0000
Received: from unknown (HELO marstons.services.quay.plus.net) (212.159.14.223)  by excalibur.plus.net with SMTP; 16 May 2002 11:36:55 -0000
X-Priority: 3
X-MSMail-Priority: Normal
Received: (qmail 699 invoked by uid 10001); 16 May 2002 11:40:53 -0000
Received: from unknown (HELO post.thorcom.com) (193.82.116.70)  by marstons.services.quay.plus.net with SMTP; 16 May 2002 11:40:53 -0000
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106
Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 178JWT-0007s7-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 16 May 2002 12:34:17 +0100
Received: from nat6.excitenetwork.com ([63.236.75.8] helo=xmxpita.excite.com) by post.thorcom.com with esmtp (Exim 3.33 #2) id 178JWQ-0007rz-00 for rsgb_lf_group@blacksheep.org; Thu, 16 May 2002 12:34:15 +0100
Received: by xmxpita.excite.com (Postfix, from userid 110) id 5A811B6F8; Thu, 16 May 2002 07:33:40 -0400 (EDT)
To: rsgb_lf_group@blacksheep.org
Subject: RE: LF: 73k mystery signal
Received: from [62.253.64.8] by xprdmailfe18.nwk.excite.com via HTTP; Thu, 16 May 2002 07:33:40 EST
From: "john sexton" <computernetworks@excite.com>
MIME-Version: 1.0
X-Sender: computernetworks@excite.com
X-Mailer: PHP
Content-Type: text/html; charset=windows-1252
Content-Transfer-Encoding: 8bit
Message-ID: <20020516113340.5A811B6F8@xmxpita.excite.com>
Date: Thu, 16 May 2002 07:33:40 -0400 (EDT)
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org
X-Listname: rsgb_lf_group
Sender: <majordom@post.thorcom.com>

 Hi Jim,
<br />
Right now (11.31 utc), 73.315 is clear but will continue to monitor.
<br />
73 John, G4CNN
<br />

<br />
--- On Thu 05/16, James Moritz <j.r.moritz@herts.ac.uk> wrote:
<br />
> Dear LF Group,
<br />
> 
<br />
> The 73.25kHz Rugby signal has been on intermittently lately, and 
<br />
> sometimes  when it is off I have been hearing a strange bleeping and 
<br />
> warbling signal, centered on about 73.315kHz. The attachment shows a
<br />
> couple 
<br />
> of minutes worth of spectrogram - the frequency span is about 1kHz, and
<br />
> the 
<br />
> signal occupies about 600Hz. The blips on the "carrier"
<br />
> frequency are 
<br />
> actually shifting up and down in frequency by a few Hz, and seem to have 
<br />
> some sort of modulation applied, although this is hard to see in this 
<br />
> screen shot.
<br />
> 
<br />
> The signal is about 20 - 30dB over the noise here - Can anyone else hear 
<br />
> it, or is it some strange form of local QRM? Could it be a communications
<br />
> 
<br />
> mode, or some sort of beacon? Would be interested if anyone has any
<br />
> ideas.
<br />
> 
<br />
> Cheers, Jim Moritz
<br />
> 73 de M0BMU<73k315.jpg 36.60 KB><p><hr><b>Join Excite! - <a href="http://www.excite.com" target=_top>http://www.excite.com</a></b><br>The most personalized portal on the Web!