Return-Path: Received: from mtain-mh05.r1000.mx.aol.com (mtain-mh05.r1000.mx.aol.com [172.29.96.217]) by air-me05.mail.aol.com (v129.10) with ESMTP id MAILINME051-8bb04db9b97721d; Thu, 28 Apr 2011 15:01:11 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mh05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 7D7F8380001A6; Thu, 28 Apr 2011 15:01:05 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QFWRi-0004bF-2J for rs_out_1@blacksheep.org; Thu, 28 Apr 2011 20:00:14 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QFWRh-0004b5-KI for rsgb_lf_group@blacksheep.org; Thu, 28 Apr 2011 20:00:13 +0100 Received: from mail-iw0-f171.google.com ([209.85.214.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1QFWRe-0004VH-Bf for rsgb_lf_group@blacksheep.org; Thu, 28 Apr 2011 20:00:13 +0100 Received: by iwn8 with SMTP id 8so3865290iwn.16 for ; Thu, 28 Apr 2011 12:00:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:content-type; bh=Oy/W9iwohfyl82vbnLjBY0Y9gEf6/XwEpsn5XP+55DA=; b=DiJFfT0pjGuUluBTJ8TP5iLJPjr9ZMyBLgb74d8uljPXquYiD4uIIo3dniSHkI220u qpEyTKVBhDZZSnDFgkgZUm9bx7Ru8kS9dlQ/M/L6j+VXn3Xa3HHHTPz41pQgVB7ZDll0 BIb2YD522YBsngxGiYEmv169KRY722u71rgHc= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=AAdJF9jK+bU8IX0gM/HN2BK6meO3LHWi2WJw/TR8TMjSKGsZ6sV3dV+U8xCQWCvG6L 0feyk8Ou5h6Gglzfb3eVrjg/XAcKRKtWyUB99TLSgux7epPpL4/tUn39xYv44bQ3jMAk nnnfG7mF+RnOUje+BabErIc5Fwo5cuqMi4ASI= MIME-Version: 1.0 Received: by 10.42.168.6 with SMTP id u6mr5223658icy.46.1304017204136; Thu, 28 Apr 2011 12:00:04 -0700 (PDT) Received: by 10.42.221.133 with HTTP; Thu, 28 Apr 2011 12:00:04 -0700 (PDT) In-Reply-To: References: Date: Thu, 28 Apr 2011 20:00:04 +0100 Message-ID: From: Roger Lapthorn To: rsgb_lf_group@blacksheep.org DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: 137.744kHz signal Content-Type: multipart/alternative; boundary=90e6ba6e8d063bc95204a1ff2ae9 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_20_30, HTML_FONTCOLOR_UNSAFE,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-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d290.2 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d60d94db9b971297f X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) --90e6ba6e8d063bc95204a1ff2ae9 Content-Type: text/plain; charset=ISO-8859-1 Well this is embarrassing.... Just realised the signal ON periods correspond to the times my WSPR beacon is not TXing, so it looks like a low level suprii from my TX PA generated locally. The driver and PA in my QRP transverter are not switched off during TX (just no drive applied), so either the driver or PA is slightly self-oscillating and this is being picked up by the RX. It must be at a very low level indeed but I will sort this later. 73s Roger G3XBM On 28 April 2011 19:49, Roger Lapthorn wrote: > I am receiving the attached signal on (around) 137.744kHz at around > 1815-1850z. The timescale shown is around 30 minutes, so it looks like a > QRSS signal from someone. > > Who is it please? > > 73s > Roger G3XBM > > -- > http://g3xbm-qrp.blogspot.com/ > http://www.g3xbm.co.uk > http://www.youtube.com/user/g3xbm > https://sites.google.com/site/sub9khz/ > > -- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/g3xbm https://sites.google.com/site/sub9khz/ --90e6ba6e8d063bc95204a1ff2ae9 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Well this is embarrassing....

Just realised the signal ON periods= correspond to the times my WSPR beacon is not TXing, so it looks like a= low level suprii from my TX PA generated locally. The driver and PA in my= QRP transverter are not switched off during TX (just no drive applied),= so either the driver or PA is slightly self-oscillating and this is being= picked up by the RX.

It must be at a very low level indeed but I will sort this later.
<= br>73s
Roger G3XBM

On 28 April 2011= 19:49, Roger Lapthorn <rogerlapthorn@gmail.com> wrote:
I am receiving the attached signal on (ar= ound) 137.744kHz at around 1815-1850z.=A0 The timescale shown is around 30= minutes, so it looks like a QRSS signal from someone.

Who is it please?

73s
Roger G3XBM

--
ht= tp://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm https= ://sites.google.com/site/sub9khz/




--
http://g3xbm-qrp.blogspot.co= m/
http://www.= g3xbm.co.uk
http://www= .youtube.com/user/g3xbm
https://sites.google.com/site/sub9khz/
--90e6ba6e8d063bc95204a1ff2ae9--