Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-de01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 12A4538000181; Sun, 25 Nov 2012 12:16:01 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1TcfnN-0005my-I8 for rs_out_1@blacksheep.org; Sun, 25 Nov 2012 17:15:05 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1TcfnN-0005mp-1a for rsgb_lf_group@blacksheep.org; Sun, 25 Nov 2012 17:15:05 +0000 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1TcfnK-0005xT-NF for rsgb_lf_group@blacksheep.org; Sun, 25 Nov 2012 17:15:03 +0000 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id qAPHF2PQ017334 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sun, 25 Nov 2012 18:15:02 +0100 Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de [129.206.22.206]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id qAPHF2rM030288 for ; Sun, 25 Nov 2012 18:15:02 +0100 Message-ID: <50B25210.50001@iup.uni-heidelberg.de> Date: Sun, 25 Nov 2012 18:14:56 +0100 From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <8CF97D11C5AE652-1638-E77C@webmail-m030.sysops.aol.com> <50B16BF8.1040007@iup.uni-heidelberg.de> In-Reply-To: X-MIME-Autoconverted: from 8bit to quoted-printable by relay2.uni-heidelberg.de id qAPHF2PQ017334 X-Spam-Score: -2.7 (--) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hi Joe, Hmm, maybe the supply voltage drops a bit during the PTT is down (driver current consumption)? Do you also use 2 voltage levels? For me it is 5V and 12V where 5V is stable and 12V may drop a bit during key down. So if you're generating your TX frequency by a xtal which is affected by a dropping supply voltage, there may be a small change in frequency. Just a theory... [...] Content analysis details: (-2.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [129.206.210.211 listed in list.dnswl.org] -0.4 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain X-Scan-Signature: 4b5b5ebe37a4c4f430f59bc35c1947b0 Subject: Re: LF: VO1NA at 20:00 - or not? Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable 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-global-disposition: G x-aol-sid: 3039ac1d40c950b252516070 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hi Joe, Hmm, maybe the supply voltage drops a bit during the PTT is down (driver=20 current consumption)? Do you also use 2 voltage levels? For me it is 5V=20 and 12V where 5V is stable and 12V may drop a bit during key down. So if=20 you're generating your TX frequency by a xtal which is affected by a=20 dropping supply voltage, there may be a small change in frequency. Just a theory... 73, Stefan Am 25.11.2012 18:03, schrieb jcraig@mun.ca: > Hi Stefan, > > Thank-you for the schematic of the 160-630m XVTR. It seems we use=20 > similar gating so it is unclear to me where the incoherence in phase=20 > originates. > > 73 > Joe > > On Sun, 25 Nov 2012, Stefan Sch=E4fer wrote: > >> Hi Joe, >> >> For example my MF PA is also keying coherently, see the schematic at=20 >> https://dl.dropbox.com/u/19882028/MF/100W%20475kHz%20PA.png >> Not difficult :-) >> 73, GL, Stefan >> >> Am 25.11.2012 01:31, schrieb jcraig@mun.ca: >>> Markus, >>> >>> Thank-you for the very helpful information. It seems that achieving=20 >>> coherence is not at all difficult and a worthwhile project for the >>> future. >>> >>> 73 >>> Joe >> >> > This electronic communication is governed by the terms and conditions a= t > http://www.mun.ca/cc/policies/electronic_communications_disclaimer_2012= .php=20 > >