Return-Path: Received: (qmail 28721 invoked from network); 1 Feb 2000 18:30:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by bells.core.plus.net.uk with SMTP; 1 Feb 2000 18:30:23 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 12FhqM-0006p9-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 01 Feb 2000 18:16:02 +0000 Content-Transfer-Encoding: 8bit Received: from aurora.eexi.gr ([195.167.28.4]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 12FhqJ-0006p4-00 for rsgb_lf_group@blacksheep.org; Tue, 01 Feb 2000 18:16:00 +0000 Received: from odin (ppp46.dialup.eexi.gr [195.167.28.110]) by aurora.eexi.gr (8.9.3/8.9.3) with SMTP id UAA18010 for ; Tue, 1 Feb 2000 20:15:54 +0200 X-Priority: 3 X-MSMail-Priority: Normal Message-ID: <3.0.2.32.20000201194925.006d969c@aurora.eexi.gr> X-Sender: sv1xv@aurora.eexi.gr X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.2 (32) Date: Tue, 01 Feb 2000 19:49:25 +0200 To: rsgb_lf_group@blacksheep.org From: "Costas Krallis" Subject: Re: LF: 73kHz Today In-reply-to: <15836.200002011714@gemini> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: At 15:26 01/02/2000 +0000, you wrote: > I would guess that the sidebands are due to power supply ripple, > and that when FSK modulation is on, all the sidebands get > modulated too. Since the data is probably not syncronised with the > mains, the end result is the amazing racket we are used to. >From the symptoms you describe, I agree with your diagnosis. It is definitely a power supply problem, possibly caused by faulty filter capacitors. 73 Costas +------------------------------------------------------------+ | Costas Krallis SV1XV * LOC KM18UA | | P.O.Box 3066 * FAX: +30-1-3811362 | | GR-10210 Athens * E-Mail: sv1xv@eexi.gr | | GREECE * | +------------------------------------------------------------+