Return-Path: Received: (qmail 9218 invoked from network); 25 Sep 2002 17:52:36 -0000 Received: from marstons.services.quay.plus.net (212.159.14.223) by mailstore with SMTP; 25 Sep 2002 17:52:36 -0000 Received: (qmail 18634 invoked by uid 10001); 25 Sep 2002 18:56:57 -0000 Received: from post.thorcom.com (193.82.116.70) by marstons.services.quay.plus.net with SMTP; 25 Sep 2002 18:56:57 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.10) id 17uGIY-0005Gl-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 25 Sep 2002 18:50:06 +0100 Received: from [62.253.162.42] (helo=mta02-svc.ntlworld.com) by post.thorcom.com with esmtp (Exim 4.10) id 17uGIY-0005Gb-00 for rsgb_lf_group@blacksheep.org; Wed, 25 Sep 2002 18:50:06 +0100 Received: from default ([62.253.49.49]) by mta02-svc.ntlworld.com (InterMail vM.4.01.03.27 201-229-121-127-20010626) with SMTP id <20020925174957.QVUM20346.mta02-svc.ntlworld.com@default> for ; Wed, 25 Sep 2002 18:49:57 +0100 Message-ID: <016d01c264bb$e1ea8420$6034fd3e@default> From: "Tracey Gardner" To: rsgb_lf_group@blacksheep.org References: <021401c264b0$4069ea60$be934c51@remote> Date: Wed, 25 Sep 2002 18:49:07 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4807.1700 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: Narrow CW filter using 32kHz clock crstals? Content-Type: text/plain; charset=Windows-1252; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=-0.1 required=5.0tests=SUBJ_ENDS_IN_Q_MARKversion=2.31 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group I recall someone making a very narrow CW filter (20Hz?) which utilised a number of 32kHz clock crystals. I'd like to have a go at building one but can't recall where I saw the information. Can anyone on the list point me in the right direction please? 73s Tracey