Return-Path: Received: (qmail 5010 invoked from network); 1 May 2002 08:15:17 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 1 May 2002 08:15:17 -0000 Received: (qmail 16943 invoked from network); 1 May 2002 08:10:05 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 1 May 2002 08:10:05 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 172qcP-0006B5-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 01 May 2002 10:41:49 +0100 Received: from gadolinium.btinternet.com ([194.73.73.111]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 172qcO-0006B0-00 for rsgb_lf_group@blacksheep.org; Wed, 01 May 2002 10:41:48 +0100 Received: from host213-1-150-212.btinternet.com ([213.1.150.212] helo=dave) by gadolinium.btinternet.com with smtp (Exim 3.22 #8) id 172p5S-0005kY-00 for rsgb_lf_group@blacksheep.org; Wed, 01 May 2002 09:03:43 +0100 Message-ID: <001f01c1f0e7$69ade440$d49601d5@dave> From: "Dave Sergeant" To: "rsgb_lf_group" References: <5.1.0.14.0.20020430145204.00a25a60@POP3.freeler.nl> Subject: LF: Re: Mains QRM blanker by PA0LQ Date: Wed, 1 May 2002 08:40:03 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: >From Dave G3YMC The noise canceller which Steve GW4ALG designed is derived from Harry PA0LQ's version with ideas from other sources - this can be found in the RSGB Low Frequency Experimenter's Handbook and on Steve's site (http://www.alg.demon.co.uk/radio/136/intro.htm). Steve's unit does exactly the same as Harry's - picks up the offending mains interference with a seperate small antenna and nulls it from the wanted signals. Note that some of the junk mail which has come via this reflector in recent days (the largest source of my junk mail at the moment) was of the kind we would prefer not to see. Has anything done yet in changing the subscribe policy as discussed previously?. 73s Dave G3YMC dsergeant@iee.org dsergeant@btinternet.com http://www.dsergeant.btinternet.co.uk