Return-Path: Received: (qmail 13890 invoked from network); 15 May 2000 21:10:29 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by teachers.core.plus.net.uk with SMTP; 15 May 2000 21:10:29 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 12rRuy-0000Ln-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 15 May 2000 21:56:48 +0100 Received: from oso.slonet.org ([207.114.180.2] ident=root) by post.thorcom.com with esmtp (Exim 3.02 #1) id 12rRur-0000Lh-00 for rsgb_lf_group@blacksheep.org; Mon, 15 May 2000 21:56:42 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from slonet.org (cas1-162.snlo.dialup.slonet.org [207.114.217.162]) by oso.slonet.org (8.9.3/8.9.3) with ESMTP id NAA02344 for ; Mon, 15 May 2000 13:56:18 -0700 (PDT) Message-ID: <392056A6.F57284D1@slonet.org> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Date: Mon, 15 May 2000 20:57:26 +0000 From: "Cliff Buttschardt" X-Mailer: Mozilla 4.72 [en] (Win98; I) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Optimal width for LF? References: <001201bfbd78$d264a680$6d5c97d4@win95.swipnet.se> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Christer and the group. I was delighted to get the two URL's containing the 30 Hz filter and noise blanker. You might remember some years ago the "HDO" phase linear filter. That was when I was W6HDO rather than K7RR. For years that filter served us well. I really enjoyed the experimental way of finding least ringing, so I placed variable resistors in the old design using an automatic key. Even the old Williams textbook approach benefited from experimental "tweaking". 73 Cliff K7RR C Andersson wrote: > > >Could you post a brief text summary of your design? > >73, Bob ZL2CA > > PA0LQ filter descriptions: > http://www.alg.demon.co.uk/radio/136/af_filter.htm > http://home5.swipnet.se/~w-54761/pa0lq_filter.htm > > 73 > Christer, sm6pxj