Return-Path: Received: (qmail 26884 invoked from network); 3 Oct 1999 18:08:36 +0100 Received: from unknown (HELO magnet.force9.net) (195.166.128.26) by guiness.force9.net with SMTP; 3 Oct 1999 18:08:36 +0100 Received: (qmail 21340 invoked from network); 3 Oct 1999 17:14:25 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by magnet.plus.net.uk with SMTP; 3 Oct 1999 17:14:25 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 11XooG-0001W3-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 03 Oct 1999 17:48:28 +0100 Received: from mail04.hostcenter.com ([195.186.64.57]) by post.thorcom.com with smtp (Exim 3.02 #1) id 11XooF-0001Vy-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Oct 1999 17:48:27 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from www303.hostcenter.com (195.186.64.84) by mail04.hostcenter.com (RS ver 1.0.51) with SMTP id 013558 for ; Sun, 3 Oct 1999 18:48:16 +0200 (MDT) Message-ID: <37F796B3.CB2FEC97@phonakcom.ch> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Date: Sun, 03 Oct 1999 19:47:31 +0200 From: "Toni Bdrtschi" Organization: Phonak Communications AG X-Mailer: Mozilla 4.03 [de] (Win95; I) MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: re Dave's Comment on filters References: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Loop-Detect: 1 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: >>From HB9ASB, JN36pt > > Ah, the key words here are "grey matter". The DSP in the brain is > far superior to anything you can get from MFJ, but only for certain > things. Certainly, the theoretical advantage in signal/noise of a > narrower filter is never achieved in practice with reception by ear > because the brain is able to do its own filtering. The main advantage > of a narrow filter is in reducing QRM which the brain has difficulty > filtering out. And perhaps Alan would find the need for a narrower > filter if he had to copy all of a QSO. > > I think thats the point, Mike and I agree with your comments. Unfortunately our grey-matter-filters have not all the same quality. Mine is probably heavy damaged by the wine growing in our region - so I really need a little help from "external" filters. 73 de Toni PS. Good signal from the G3XTZ beacon on 135.950 Can copy it by ear with 10Hz BW (the band down there is full of carriers from unknown sources)