X-GM-THRID: 1240778491233031082 X-Gmail-Labels: rsgb lf Delivered-To: daveyxm@gmail.com Received: by 10.78.172.10 with SMTP id u10cs300196hue; Sun, 1 Jul 2007 07:02:59 -0700 (PDT) Received: by 10.82.146.14 with SMTP id t14mr10763634bud.1183298579760; Sun, 01 Jul 2007 07:02:59 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.google.com with ESMTP id d25si12579272nfh.2007.07.01.07.02.55; Sun, 01 Jul 2007 07:02:59 -0700 (PDT) Received-SPF: neutral (google.com: 193.82.116.20 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) DomainKey-Status: bad (test mode) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1I4zyO-0000Cj-78 for rs_out_1@blacksheep.org; Sun, 01 Jul 2007 15:00:20 +0100 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1I4zyM-0000Ca-JY for rsgb_lf_group@blacksheep.org; Sun, 01 Jul 2007 15:00:18 +0100 Received: from smtp811.mail.ird.yahoo.com ([217.146.188.71]) by relay3.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1I4zyL-0002wl-PN for rsgb_lf_group@blacksheep.org; Sun, 01 Jul 2007 15:00:18 +0100 Received: (qmail 1691 invoked from network); 1 Jul 2007 14:00:12 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=btopenworld.com; h=Received:X-YMail-OSG:Received:Message-ID:From:To:References:Subject:Date:MIME-Version:Content-Type:Content-Transfer-Encoding:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE; b=WHyrW2m7ktKANwwrSBHoHQo8cuJb2MgKJ9qBmRJpkq7T4CDA9EqTS/Bo6gIrDRZK1ZfGRBAAMSdY6CAFKmDk0joQQAa0F395gh08nUC0cWAlTAUhcBhhudNP6keIHr4DdrqP36n7WqVmabdXaiTqoC4j+/iZPsYggBrMXx1p8oo= ; Received: from unknown (HELO w4o8m9) (james.moritz@btopenworld.com@213.122.19.165 with login) by smtp811.mail.ird.yahoo.com with SMTP; 1 Jul 2007 14:00:11 -0000 X-YMail-OSG: DkShm04VM1ndWbFpAM8KlyKSt1ZHF3eokUJhEdZjkWS6TRoY.d8STYIVmBFhulgVcPIDk.lXe6t2803OYTWEVpfMtqOU7fxMDSeHCgAciJghqoDa Received: from 127.0.0.1 (AVG SMTP 7.5.476 [269.9.14/882]); Sun, 01 Jul 2007 14:59:59 +0100 Message-ID: <000d01c7bbe8$1d202080$a5137ad5@w4o8m9> From: "James Moritz" To: References: <200707011513.09596.smtp01@email.it> Date: Sun, 1 Jul 2007 14:59:59 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: Re: SAQ received in north Italy Content-Type: text/plain; charset="iso-8859-1" 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 Status: O X-Status: X-Keywords: X-UID: 1333 Dear Claudio > I've observed that when SAQ key was up on my PC screen I can see a very weak > signal, as some carrier leakage. > > Any info about SAQ key-up ERP radiated? > The SAQ alternator runs continuously, and is keyed by using a magnetic amplifier (saturating reactor) to short circuit the alternator output when the key is up. However, the impedance of the reactor does not actually reach zero, so some power is radiated. It is usually about 20 - 25dB down on the key-down signal level. At my QTH it is usually audible when SAQ is running but not sending, and you can hear the pitch of the CW note decreasing when the TX is shut down. Cheers, Jim Moritz 73 de M0BMU