Return-Path: Received: (qmail 12639 invoked from network); 9 Jun 2004 15:02:04 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore02.plus.net with SMTP; 9 Jun 2004 15:02:04 -0000 Received: (qmail 38016 invoked from network); 9 Jun 2004 15:02:03 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 9 Jun 2004 15:01:41 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BY4aC-0008KM-TI for dave@picks.force9.co.uk; Wed, 09 Jun 2004 16:01:41 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BY4Wj-0005kW-Qd for rs_out_1@blacksheep.org; Wed, 09 Jun 2004 15:58:05 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BY4Wi-0005kN-GM for rsgb_lf_group@blacksheep.org; Wed, 09 Jun 2004 15:58:04 +0100 Received: from virus-out.ttyl.com ([193.212.240.200] helo=scan.telenor.net) by relay.salmark.net with esmtp (Exim 4.24) id 1BYB5D-0003Oh-KX for rsgb_lf_group@blacksheep.org; Wed, 09 Jun 2004 22:58:07 +0100 X-Fake-Domain: tns-fbu-22-209.corp.telenor.no Received: from tns-fbu-22-209.corp.telenor.no ([134.47.162.190] [134.47.162.190]) by scan.telenor.net with ESMTP for rsgb_lf_group@blacksheep.org; Wed, 9 Jun 2004 16:56:44 +0200 X-Fake-Domain: tns-fbu-22-212.corp.telenor.no Received: from tns-fbu-22-212.corp.telenor.no ([134.47.162.91]) by tns-fbu-22-209.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.6713); Wed, 9 Jun 2004 16:56:44 +0200 X-Fake-Domain: TNS-FBU-2E-006.corp.telenor.no Received: from TNS-FBU-2E-006.corp.telenor.no ([134.47.162.86]) by tns-fbu-22-212.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.6713); Wed, 9 Jun 2004 16:56:44 +0200 X-MimeOLE: Produced By Microsoft Exchange V6.0.6487.1 content-class: urn:content-classes:message Date: Wed, 9 Jun 2004 16:56:44 +0200 X-Bad-Message-ID: no DNS (TNS-FBU-2E-006.corp.telenor.no) Message-Id: Thread-Topic: G3ldo's noise Thread-Index: AcROIEN3IaoL72ENQ3KC9yJLr9dpxwAEPXkA From: jan-martin.noding@telenor.com To: rsgb_lf_group@blacksheep.org X-OriginalArrivalTime: 09 Jun 2004 14:56:44.0384 (UTC) FILETIME=[FAF37600:01C44E31] MIME-Version: 1.0 X-Spam-Score: 1.2 (+) X-Spam-Report: autolearn=no,HTML_30_40=0.809,HTML_FONT_BIG=0.1,HTML_MESSAGE=0.001,NO_REAL_NAME=0.285 Subject: LF: RE: G3ldo's noise Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.2 required=5.0 tests=HTML_30_40,HTML_FONT_BIG, HTML_MESSAGE,NO_REAL_NAME autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Content-transfer-encoding: 8bit

Very often such noise could be improved with a simple task, the first thing to try is connecting a bifilar wound choke where your telephone line enters the house. the next is to improve at your neighbours. Very often the balance is not what you might think, I've shown some of my own experience from telecomms on http://www.noding.com/la8ak/12345/n11.htm

A bifilar wound choke passes the balanced signal, but attenuates the unbalanced. Propose to wind a 2x 1mH choke (possibly much less)

73

Jan-Martin, LA8AK

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J M Nøding, Kristiansand