Return-Path: Received: from mtain-df06.r1000.mx.aol.com (mtain-df06.r1000.mx.aol.com [172.29.64.218]) by air-df03.mail.aol.com (v129.4) with ESMTP id MAILINDF031-5eea4cc7271c3e; Tue, 26 Oct 2010 15:08:12 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-df06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 9566B380000AF; Tue, 26 Oct 2010 15:08:09 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PAor0-0006p6-C8 for rs_out_1@blacksheep.org; Tue, 26 Oct 2010 20:06:38 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PAoqz-0006ox-Ps for rsgb_lf_group@blacksheep.org; Tue, 26 Oct 2010 20:06:37 +0100 Received: from 113-mo2-8.acn.waw.pl ([62.121.95.113] helo=paranoid.lipkowski.org) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PAoqx-0006C3-Hf for rsgb_lf_group@blacksheep.org; Tue, 26 Oct 2010 20:06:37 +0100 Received: from paranoid.lipkowski.org (localhost [127.0.0.1]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id o9QJ6XHZ020662 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 26 Oct 2010 21:06:33 +0200 Received: from localhost (sq5bpf@localhost) by paranoid.lipkowski.org (8.13.7/8.13.6/Submit) with ESMTP id o9QJ6WLW020659 for ; Tue, 26 Oct 2010 21:06:33 +0200 X-Authentication-Warning: paranoid.lipkowski.org: sq5bpf owned process doing -bs Date: Tue, 26 Oct 2010 21:06:32 +0200 (CEST) From: Jacek Lipkowski To: rsgb_lf_group@blacksheep.org In-Reply-To: Message-ID: References: MIME-Version: 1.0 X-Spam-Score-sq5bpf: -2.601 () BAYES_00,SPF_HELO_PASS,SPF_PASS X-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: Simple, low cost, 8.970kHz stable source? Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed 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: 3039ac1d40da4cc7271812d2 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : temperror X-Mailer: Unknown (No Version) On Tue, 26 Oct 2010, Roger Lapthorn wrote: > What do people think is the simplest, lowest cost, way of generating a > stable 8.970kHz frequency that does not require a PC when running? [...] - your transceiver transmitting on 8.970MHz into a dummy load (wideband mod is necssesary), divided /1000 with whatever logic you want (7490 etc) - surplus ocxo (or tcxo) driving minidds: http://www.myplace.nu/avr/minidds/index.htm , the source needs a minor mod to set the desired frequency and waveform at startup, so that no computer is needed) btw, what do you mean by stable? VY 73 Jacek / SQ5BPF