Return-Path: Received: from rly-mb06.mx.aol.com (rly-mb06.mail.aol.com [172.21.131.164]) by air-mb08.mail.aol.com (v125.7) with ESMTP id MAILINMB081-d124acb1d8a20f; Tue, 06 Oct 2009 06:36:13 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-mb06.mx.aol.com (v125.7) with ESMTP id MAILRELAYINMB066-d124acb1d8a20f; Tue, 06 Oct 2009 06:35:55 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Mv7N6-0001wh-0D for rs_out_1@blacksheep.org; Tue, 06 Oct 2009 11:34:20 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Mv7N5-0001wX-K2 for rsgb_lf_group@blacksheep.org; Tue, 06 Oct 2009 11:34:19 +0100 Received: from moutng.kundenserver.de ([212.227.126.188]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Mv7Lh-0005F8-Gp for rsgb_lf_group@blacksheep.org; Tue, 06 Oct 2009 11:32:54 +0100 Received: from [192.168.1.64] (host86-179-107-143.range86-179.btcentralplus.com [86.179.107.143]) by mrelayeu.kundenserver.de (node=mreu1) with ESMTP (Nemesis) id 0MW7C9-1MoJtL3P4r-00XuQY; Tue, 06 Oct 2009 12:34:03 +0200 From: "Dave Sergeant" To: rsgb_lf_group@blacksheep.org Date: Tue, 06 Oct 2009 11:34:09 +0100 MIME-Version: 1.0 Message-ID: <4ACB1D21.30499.1157C60@dave.davesergeant.com> In-reply-to: <533316794.1254824265.716020824.98658@mcgi14.rambler.ru> References: <7C7E8BA2E4774209B0F33D2E5FFABE2F@HPt680a>, <533316794.1254824265.716020824.98658@mcgi14.rambler.ru> X-mailer: Pegasus Mail for Windows (4.51) Content-description: Mail message body X-Provags-ID: V01U2FsdGVkX19XNxGh5UEG5ioDCZdeVW66KQGkEcElSIVzh0W 41CYHFcAD+iLFokAZA555vcaXXDO2/0pQzil5n2cNltv9GM7kx BOjYAYYIBJSf+igC/HL9dh/QnHat0vv X-Karma: unknown: X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: Re: What is on 499.993 kcs ? Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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-IP: 193.82.116.20 On 6 Oct 2009 at 14:17, Roman RW3ADB wrote: > G'day Steve. > > * VK2ZTO [Tue, 6 Oct 2009 19:15:34 +1100]: > > G'day All, > > > > I had a look at the RW3ADB grabber and I see exactly the same > > characteristic > > signal here in VK-land on 499,993 Hz. Can't think what it might be. > > > > Sometimes it looks like one or two second dots and sometimes it looks > > continuous. > > > > Attached are two comparisons. > > > > Any clues ? > > > Two variants Steve: > 1) Russian Army use an IF 500Kc. May be a heterodynes signals. But how > is rx'd in AU? ) 2) Pulse-Power converters. Or more likely the 32nd harmonic of the 15.625kHz TV line ocillator rate. UK, UA and VK all use the 625 line PAL standard (though parts of USSR are Secam). The line rate is actually locked to the colour subcarrier of 4.43361875 MHz which may account for the 7Hz shift at 500kHz. 73 Dave G3YMC http://www.davesergeant.com