X-GM-THRID: 1203997925931527886 X-Gmail-Labels: rsgb lf X-Gmail-Received: ce651735ad4c86eb0d99173e2b4a00f85798be5b Delivered-To: daveyxm@gmail.com Received: by 10.54.72.5 with SMTP id u5cs104529wra; Sun, 21 May 2006 10:55:10 -0700 (PDT) Received: by 10.49.10.13 with SMTP id n13mr3089521nfi; Sun, 21 May 2006 10:55:09 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.gmail.com with ESMTP id a24si4036550nfc.2006.05.21.10.55.09; Sun, 21 May 2006 10:55:09 -0700 (PDT) Received-SPF: neutral (gmail.com: 193.82.116.20 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Fhs5T-0004eX-Jp for rs_out_1@blacksheep.org; Sun, 21 May 2006 18:51:31 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Fhs5T-0004eO-8c for rsgb_lf_group@blacksheep.org; Sun, 21 May 2006 18:51:31 +0100 Received: from imo-m26.mx.aol.com ([64.12.137.7]) by relay1.thorcom.net with esmtp (Exim 4.51) id 1Fhs5P-0004NK-4W for rsgb_lf_group@blacksheep.org; Sun, 21 May 2006 18:51:31 +0100 Received: from WarmSpgs@aol.com by imo-m26.mx.aol.com (mail_out_v38_r7.5.) id l.453.109bfd8 (30739) for ; Sun, 21 May 2006 13:51:18 -0400 (EDT) From: WarmSpgs@aol.com Message-ID: <453.109bfd8.31a20296@aol.com> Date: Sun, 21 May 2006 13:51:18 EDT To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 9.0 for Windows sub 5055 X-Spam-Flag: NO X-Spam-Score: -0.9 (/) X-Spam-Report: autolearn=disabled,AWL=-1.139,HTML_30_40=0.056,HTML_MESSAGE=0.001,NO_REAL_NAME=0.178 Subject: Re: LF: SAQ 17.2 kHz Content-Type: multipart/alternative; boundary="-----------------------------1148233878" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.3 required=5.0 tests=HTML_MESSAGE,NO_REAL_NAME 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: 5859 -------------------------------1148233878 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit The control circuitry for an alternator transmitter takes into account that the drive motor needs to receive more power during key down than during key up condition. The key not only drives the magnetic amplifier that passes or shuts off RF, but also an auxiliary circuit that throttles back power to the motor when the key is up. There is a grand rheostat to trim the key-up speed to match the key-down speed. However, I expect this is a fairly delicate balancing act; and, I don't believe the motor control system can respond quite as quickly to a state change as the magnetic amplifier does. John -------------------------------1148233878 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

The control circuitry for an alternator transmitter takes into account=20= that the drive motor needs to receive more power during key down than during= key up condition. The key not only drives the magnetic amplifier that= passes or shuts off RF, but also an auxiliary circuit that throttles back p= ower to the motor when the key is up. There is a grand rheostat to tri= m the key-up speed to match the key-down speed. However, I expect this= is a fairly delicate balancing act; and, I don't believe the motor con= trol system can respond quite as quickly to a state change as the magne= tic amplifier does.

John

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