Return-Path: Received: (qmail 8071 invoked from network); 27 Sep 2002 14:06:07 -0000 Received: from marstons.services.quay.plus.net (212.159.14.223) by mailstore with SMTP; 27 Sep 2002 14:06:07 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 18366 invoked by uid 10001); 27 Sep 2002 15:10:27 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from post.thorcom.com (193.82.116.70) by marstons.services.quay.plus.net with SMTP; 27 Sep 2002 15:10:26 -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 17uvjH-0005Da-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 27 Sep 2002 15:04:27 +0100 Received: from [212.125.75.12] (helo=mail4.messagelabs.com) by post.thorcom.com with smtp (Exim 4.10) id 17uvjH-0005D4-00 for rsgb_lf_group@blacksheep.org; Fri, 27 Sep 2002 15:04:27 +0100 X-VirusChecked: Checked Received: (qmail 6938 invoked from network); 27 Sep 2002 14:04:22 -0000 Received: from unknown (HELO ukfw1.ge.boc.com) (193.131.2.157) by server-17.tower-4.messagelabs.com with SMTP; 27 Sep 2002 14:04:22 -0000 Received: from z-160-100-160-136.est.ibm.com ([160.100.160.136]) by ukfw1.ge.boc.com; Fri, 27 Sep 2002 15:04:20 +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 TP3FD0H7; Fri, 27 Sep 2002 15:07:21 +0100 Received: by EXC_WIL04 with Internet Mail Service (5.5.2653.19) id ; Fri, 27 Sep 2002 10:04:16 -0400 Message-ID: From: "Ashlock,William" To: rsgb_lf_group@blacksheep.org Date: Fri, 27 Sep 2002 10:04:14 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Subject: LF: RE: Re: Re: RE: Narrow CW filter using 32kHz clock crstals? 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 Hello Andy, Hugh, and all filter lovers, I'm concerned about the transient response since this is the REAL measure of a good filter. How does it respond to a step input? It could ring for minutes! Hugh, please post the results of the spectrum test when you complete it. Thanks, Bill A >Hello Andy >I think I've answered my own question here. >I built the filter and it doesn't work with 50 ohm input/output impedance, >but it DOES work with 50k ohms. Narrow isn't it ! I can just about hit the right frequency with >a signal generator and see some sine wave on the scope. I haven't had a chance to put it on the >spectrum analyser yet. _____________________________________________________________________ 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