Return-Path: Received: from mtain-mj05.r1000.mx.aol.com (mtain-mj05.r1000.mail.aol.com [172.21.164.89]) by air-mb07.mail.aol.com (v129.4) with ESMTP id MAILINMB071-a7844cc71d792eb; Tue, 26 Oct 2010 14:27:05 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mj05.r1000.mx.aol.com (Internet Inbound) with ESMTP id C84EC3800010F; Tue, 26 Oct 2010 14:27:02 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PAoDJ-0006XN-TL for rs_out_1@blacksheep.org; Tue, 26 Oct 2010 19:25:37 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PAoDJ-0006XE-Dh for rsgb_lf_group@blacksheep.org; Tue, 26 Oct 2010 19:25:37 +0100 Received: from mail-iw0-f171.google.com ([209.85.214.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PAoDF-0005wz-PM for rsgb_lf_group@blacksheep.org; Tue, 26 Oct 2010 19:25:37 +0100 Received: by iwn35 with SMTP id 35so1204533iwn.16 for ; Tue, 26 Oct 2010 11:25:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type; bh=+p3PY15U70/LQvELg+4GmsSrsWfaK/A98GukGaVet1M=; b=LMYRE0qpFxkmIDjs1e200bO0HYmp3HFTVa8ypBrrXt5MQorOrcKuXxgACAT36HR8FE uCG+0s9uW2wCuwMPvcAfBcFLdnlXStwsBGNgDVdR0LX7tK4Dqi8hdRdZiBvwZutKCBrp 1MIUd15x8mYThN9kri9PQSMzjvfI1UyY6NXOY= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=AWmuUoWUU9EJ3uM2aWlRqyYNnU+PB/9BiJe0ON7W98HIUsrUXzUtiIhY21EQa8yrCR 56k1BE2ql6REbWrC2J6Eg2c1lS1R4R4kYSxkXed2Of8FGlZRRA8b7z3PGiWPNUkvHRsF mqEuwQrQc8sQhkyG/eRaou7ebhxOqLN+7WYBY= MIME-Version: 1.0 Received: by 10.231.15.137 with SMTP id k9mr4029379iba.134.1288117531610; Tue, 26 Oct 2010 11:25:31 -0700 (PDT) Received: by 10.231.79.69 with HTTP; Tue, 26 Oct 2010 11:25:31 -0700 (PDT) In-Reply-To: References: Date: Tue, 26 Oct 2010 19:25:31 +0100 Message-ID: From: Andy Talbot To: rsgb_lf_group@blacksheep.org DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: RE: Simple, low cost, 8.970kHz stable source? Content-Type: multipart/alternative; boundary=0022153dd7cfe6a1a20493893b2e X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_30_40,HTML_MESSAGE 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-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m219.1 ; domain : googlemail.com DKIM : pass x-aol-sid: 3039400c89aa4cc71d76089c X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) --0022153dd7cfe6a1a20493893b2e Content-Type: text/plain; charset=ISO-8859-1 Use a programmable divider for more obscure division ratios. September's RadCom has a generic design for 74HC161 type Andy www.g4jnt.com On 26 October 2010 19:16, Roger Lapthorn wrote: > CB crystals.... thanks Rik (and others). This does sound like a sensible > and low cost approach. > > 73s > Roger G3XBM > > On 26 October 2010 19:03, Rik Strobbe wrote: > >> Roger, >> >> an easy (and cheap way) might be CB crystals. Most are 3rd overtone in the >> range of 26965-27405kHz (= 8988-9135kHz xtal frequency). Divided by 1024 >> (eg. using a 74HC4060 as oscillator / divider) you get 8777-8921Hz. >> >> 73, Rik ON7YD - OR7T >> >> ------------------------------ >> *Van:* owner-rsgb_lf_group@blacksheep.org [ >> owner-rsgb_lf_group@blacksheep.org] namens Roger Lapthorn [ >> rogerlapthorn@gmail.com] >> *Verzonden:* dinsdag 26 oktober 2010 19:04 >> *Aan:* rsgb_lf_group@blacksheep.org >> *Onderwerp:* LF: Simple, low cost, 8.970kHz stable source? >> >> 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? I thought >> of an HF crystal divided down by 256 (from 2.296320MHz), but have you tried >> to buy a "made to order" crystal lately? >> >> 73 >> Roger G3XBM >> -- >> http://g3xbm-qrp.blogspot.com/ >> http://www.g3xbm.co.uk >> http://www.youtube.com/user/g3xbm >> G3XBM GQRP 1678 ISWL G11088 >> > > > > -- > http://g3xbm-qrp.blogspot.com/ > http://www.g3xbm.co.uk > http://www.youtube.com/user/g3xbm > G3XBM GQRP 1678 ISWL G11088 > --0022153dd7cfe6a1a20493893b2e Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Use a programmable divider for more obscure division ratios.=A0
September's RadCom has a generic design for 74HC161 type
=A0
On 26 October 2010 19:16, Roger Lapthorn <rogerlapthorn@= gmail.com> wrote:
CB crystals.... thanks Rik (an= d others). This does sound like a sensible and low cost approach.

= 73s
Roger G3XBM

On 26 October 2010 19:03, Rik Strobbe <Rik.Strobbe@fys.kuleuven.be> wrote:
Roger,
=A0
an easy (and cheap way) might be CB crystals.=A0Most are 3rd overtone= in the range of 26965-27405kHz (=3D 8988-9135kHz xtal frequency). Divided= by 1024 (eg. using a 74HC4060 as oscillator / divider) you get 8777-8921H= z.
=A0
73, Rik=A0 ON7YD - OR7T
=A0
Van: owner-rsgb_lf= _group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org] namens Ro= ger Lapthorn [rogerlapthorn@gmail.com]
Verzonden: dinsdag 26 oktober 2010 19:04
Aan: rsgb_lf_group@black= sheep.org
Onderwerp: LF: Simple, low cost, 8.970kHz stable= source?

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? I th= ought of an HF crystal divided down by 256 (from 2.296320MHz), but have yo= u tried to buy a "made to order" crystal lately?

73
Roger G3XBM
--
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://www.youtub= e.com/user/g3xbm
G3XBM=A0=A0 GQRP 1678=A0=A0=A0 ISWL G11088



--
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk<= br> http://www= .youtube.com/user/g3xbm
G3XBM=A0=A0 GQRP 1678=A0=A0=A0 ISWL G11088<= br>

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