Return-Path: Received: (qmail 68055 invoked from network); 12 Apr 2004 13:36:32 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore03.plus.net with SMTP; 12 Apr 2004 13:36:32 -0000 Received: (qmail 75582 invoked from network); 12 Apr 2004 13:36:31 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 12 Apr 2004 13:36:30 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BD1bx-000JLz-WF for dave@picks.force9.co.uk; Mon, 12 Apr 2004 13:36:30 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BD1aq-0004Hv-QE for rs_out_1@blacksheep.org; Mon, 12 Apr 2004 14:35:20 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BD1aq-0004Hm-9a for rsgb_lf_group@blacksheep.org; Mon, 12 Apr 2004 14:35:20 +0100 Received: from mailgate.urz.tu-dresden.de ([141.30.66.154]) by relay.salmark.net with esmtp (Exim 4.24) id 1BD1an-0005L8-Ax for rsgb_lf_group@blacksheep.org; Mon, 12 Apr 2004 14:35:17 +0100 Received: from [127.0.0.1] (helo=localhost) by mailgate.urz.tu-dresden.de with esmtp (exim-4.22) for id 1BD1am-00027N-Cc; Mon, 12 Apr 2004 15:35:16 +0200 Received: from mailgate.urz.tu-dresden.de ([127.0.0.1]) by localhost (rks24 [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 07983-04 for ; Mon, 12 Apr 2004 15:35:15 +0200 (MET DST) X-No-DNS-For: 141.30.213.64 Received: from [141.30.213.64] (helo=fkurz.wh26.tu-dresden.de) by mailgate.urz.tu-dresden.de with esmtp (exim-4.22) for id 1BD1al-00027H-Nm; Mon, 12 Apr 2004 15:35:15 +0200 From: Fabian Kurz To: rsgb_lf_group@blacksheep.org Date: Mon, 12 Apr 2004 15:34:50 +0000 User-Agent: KMail/1.5.3 References: <000501c42080$45764ca0$6300a8c0@men.edu.pl> In-Reply-To: <000501c42080$45764ca0$6300a8c0@men.edu.pl> MIME-Version: 1.0 Content-Disposition: inline Message-Id: <200404121534.50804.fk@diolog.de> X-TUD-Virus-Scanned: by amavisd-new at rks24.urz.tu-dresden.de X-TUD-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on rks24 X-Spam-Score: 0.0 (/) Subject: Re: LF: Re: O copy of RN6BN etc. Content-Type: text/plain; charset=iso-8859-2; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com 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-PN-SPAMFiltered: yes X-Spam-Rating: 1 On Monday 12 April 2004 11:21, Marek SQ5BPM wrote: > We have a problem at ZCC as our FT-990's reference oscillator stability > degraded heavily with no reason - hard to work even normal CW as it happens > to jump by 300-400 Hz (with no change on the display) and then slowly gets > back to the original QRG. Strange - I suspect the reference quartz is > broken and I am considering buying the TCXO-2. But first we let someone > with better mesuring equipment to have a look at it. Do you think the > master reference or rather the synthesis circuit is broken? Did anyone have > a similar problem? I experienced exactly the same problem with my FT-890 and it turned out to be a bad trimmer capacitor which is in series to the reference Xtal. After replacing this trimmer the frequency-stability was very good again. Maybe the FT-990 uses the same reference-frequency-circuit? 73, Fabian DJ1YFK -- Fabian Kurz - DJ1YFK * http://fkurz.net/