Return-Path: Received: (qmail 16745 invoked from network); 27 Sep 2002 18:15:27 -0000 Received: from murphys.services.quay.plus.net (212.159.14.225) by mailstore with SMTP; 27 Sep 2002 18:15:27 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 23946 invoked from network); 27 Sep 2002 18:15:34 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from post.thorcom.com (193.82.116.70) by murphys.services.quay.plus.net with SMTP; 27 Sep 2002 18:15:34 -0000 X-SQ: A X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 4.10) id 17uzbk-0005rR-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 27 Sep 2002 19:12:56 +0100 Received: from [212.125.75.12] (helo=mail4.messagelabs.com) by post.thorcom.com with smtp (Exim 4.10) id 17uzbk-0005rH-00 for rsgb_lf_group@blacksheep.org; Fri, 27 Sep 2002 19:12:56 +0100 X-VirusChecked: Checked Received: (qmail 10195 invoked from network); 27 Sep 2002 18:12:53 -0000 Received: from unknown (HELO ukfw1.ge.boc.com) (193.131.2.157) by server-12.tower-4.messagelabs.com with SMTP; 27 Sep 2002 18:12:53 -0000 Received: from z-160-100-160-136.est.ibm.com ([160.100.160.136]) by ukfw1.ge.boc.com; Fri, 27 Sep 2002 19:12:51 +0100 (BST) Received: from exc_wil04.edwards.boc.com ([162.118.144.226]) by exc_cra03.edwards.boc.com with SMTP (Microsoft Exchange Internet Mail Service Version 5.5.2653.13) id TP3F1B0J; Fri, 27 Sep 2002 19:15:56 +0100 Received: by EXC_WIL04 with Internet Mail Service (5.5.2653.19) id ; Fri, 27 Sep 2002 14:12:50 -0400 Message-ID: From: "Ashlock,William" To: rsgb_lf_group@blacksheep.org Date: Fri, 27 Sep 2002 14:12:49 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Subject: LF: RE: RE: Narrow CW filter using 32kHz clock crystals? Content-Type: text/plain; charset=iso-8859-1; format=flowed X-Spam-Status: No, hits=-0.2 required=5.0tests=SUBJ_ENDS_IN_Q_MARK,FROM_NAME_NO_SPACESversion=2.31 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Andy, >This filter is shown in the LF Experimenters Handbook on page 25, as part of >the outline design for a narrow bandwidth LF receiver. The frequency >response I measured is given on page 26 >A step change causes it to ring for a few cycles Thanks for the info - looks good!. I'll read that article tonight (must have missed it) and also check out the filter on the bench as soon as I can pick up the xtals. Bill A _____________________________________________________________________ This e-mail has been scanned for viruses by the WorldCom Internet Managed Scanning Service - powered by MessageLabs. For further information visit http://www.worldcom.com