Return-Path: Received: from mtain-da07.r1000.mx.aol.com (mtain-da07.r1000.mx.aol.com [172.29.64.79]) by air-dc01.mail.aol.com (v129.4) with ESMTP id MAILINDC014-869f4cc71866366; Tue, 26 Oct 2010 14:05:26 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-da07.r1000.mx.aol.com (Internet Inbound) with ESMTP id C78663800024D; Tue, 26 Oct 2010 14:05:24 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PAnsD-0006IX-Iw for rs_out_1@blacksheep.org; Tue, 26 Oct 2010 19:03:49 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PAnsC-0006IO-U8 for rsgb_lf_group@blacksheep.org; Tue, 26 Oct 2010 19:03:48 +0100 Received: from cavuit01.kulnet.kuleuven.be ([134.58.240.43]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PAns9-0005mZ-7h for rsgb_lf_group@blacksheep.org; Tue, 26 Oct 2010 19:03:48 +0100 Received: from smtps02.kuleuven.be (smtpshost02.kulnet.kuleuven.be [134.58.240.75]) by cavuit01.kulnet.kuleuven.be (Postfix) with ESMTP id 6BBEC7B804D for ; Tue, 26 Oct 2010 20:03:35 +0200 (CEST) Received: from ICTS-S-HUB-N3.luna.kuleuven.be (icts-s-hub-n3.luna.kuleuven.be [10.112.9.13]) by smtps02.kuleuven.be (Postfix) with ESMTP id 3FEFCF3862 for ; Tue, 26 Oct 2010 20:03:35 +0200 (CEST) Received: from ICTS-S-EXC2-CA.luna.kuleuven.be ([10.112.11.13]) by ICTS-S-HUB-N3.luna.kuleuven.be ([10.112.9.13]) with mapi; Tue, 26 Oct 2010 20:03:34 +0200 X-Kuleuven: This mail passed the K.U.Leuven mailcluster From: Rik Strobbe To: "rsgb_lf_group@blacksheep.org" Date: Tue, 26 Oct 2010 20:03:35 +0200 Thread-Topic: Simple, low cost, 8.970kHz stable source? Thread-Index: Act1MH4a29lyTWCpTY2UnZj9QgCubQABtsZE Message-ID: References: In-Reply-To: Accept-Language: nl-NL, nl-BE Content-Language: nl-BE X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: nl-NL, nl-BE MIME-Version: 1.0 X-KULeuven-Information: Katholieke Universiteit Leuven X-KULeuven-Scanned: Found to be clean X-KULeuven-Envelope-From: rik.strobbe@fys.kuleuven.be X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: LF: RE: Simple, low cost, 8.970kHz stable source? Content-Type: multipart/alternative; boundary="_000_BF4A524700075746A6467658DFC7102C886E0FF50FICTSSEXC2CAlu_" 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, TO_ADDRESS_EQ_REAL 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: 3039ac1d404f4cc7186448f1 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) --_000_BF4A524700075746A6467658DFC7102C886E0FF50FICTSSEXC2CAlu_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Roger, an easy (and cheap way) might be CB crystals. Most are 3rd overtone in the= range of 26965-27405kHz (=3D 8988-9135kHz xtal frequency). Divided by 102= 4 (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.or= g] 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 sta= ble 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 tri= ed 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 --_000_BF4A524700075746A6467658DFC7102C886E0FF50FICTSSEXC2CAlu_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Roger,
 
an easy (and cheap way) might be CB crystals. Most are 3rd overt= one in the range of 26965-27405kHz (=3D 8988-9135kHz xtal frequency). Divi= ded by 1024 (eg. using a 74HC4060 as oscillator / divider) you get 8777-89= 21Hz.
 
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 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.u= k
http://www= .youtube.com/user/g3xbm
G3XBM   GQRP 1678    ISWL G11088
--_000_BF4A524700075746A6467658DFC7102C886E0FF50FICTSSEXC2CAlu_--