Return-Path: Received: from rly-ma02.mx.aol.com (rly-ma02.mail.aol.com [172.20.116.46]) by air-ma09.mail.aol.com (v121_r2.12) with ESMTP id MAILINMA093-89248ca2bd11e5; Fri, 12 Sep 2008 04:44:05 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-ma02.mx.aol.com (v121_r2.11) with ESMTP id MAILRELAYINMA024-89248ca2bd11e5; Fri, 12 Sep 2008 04:44:04 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Ke4FZ-0006so-4G for rs_out_1@blacksheep.org; Fri, 12 Sep 2008 09:43:33 +0100 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Ke4FY-0006sf-MY for rsgb_lf_group@blacksheep.org; Fri, 12 Sep 2008 09:43:32 +0100 Received: from cavuit01.kulnet.kuleuven.be ([134.58.240.43]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Ke4FU-0003vb-K3 for rsgb_lf_group@blacksheep.org; Fri, 12 Sep 2008 09:43:32 +0100 Received: from smtps02.kuleuven.be (smtpshost02.kulnet.kuleuven.be [134.58.240.75]) by cavuit01.kulnet.kuleuven.be (Postfix) with ESMTP id AC2937B80BB for ; Fri, 12 Sep 2008 10:42:10 +0200 (CEST) Received: from smtps02.kuleuven.be (localhost [127.0.0.1]) by smtps02.kuleuven.be (Postfix) with ESMTP id 6DFEFF3863 for ; Fri, 12 Sep 2008 10:42:10 +0200 (CEST) Received: from dell-rik.fys.kuleuven.be (dhcp-10-33-85-199.fys.kuleuven.be [10.33.85.199]) by smtps02.kuleuven.be (Postfix) with ESMTP id 50A46F3862 for ; Fri, 12 Sep 2008 10:42:10 +0200 (CEST) X-Mailer: QUALCOMM Windows Eudora Version 7.1.0.9 Date: Fri, 12 Sep 2008 10:42:14 +0200 To: rsgb_lf_group@blacksheep.org X-Kuleuven: This mail passed the K.U.Leuven mailcluster From: Rik Strobbe In-Reply-To: <48C9D101.70002@telus.net> References: <48C89A4D.5020008@telus.net> <001001c913f9$0e86f5c0$8d01a8c0@JAYDELL> <48C9D101.70002@telus.net> Mime-Version: 1.0 Message-Id: <20080912084210.50A46F3862@smtps02.kuleuven.be> X-KULeuven-Information: Katholieke Universiteit Leuven X-KULeuven-Scanned: Found to be clean X-KULeuven-Envelope-From: rik.strobbe@fys.kuleuven.be X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: Re: AC Noise on RX... Content-Type: text/plain; charset="us-ascii"; format=flowed X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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-AOL-IP: 193.82.116.20 X-AOL-SCOLL-AUTHENTICATION: domain : post.thorcom.com ; SPF_helo = n X-AOL-SCOLL-AUTHENTICATION: domain : fys.kuleuven.be ; SPF_822_from = n Scott, >The noise is only there AFTER I connect the antenna. So it has >something to do with the mains AC, coax run and the antenna... if I recapitulate right, the noise is there when you: 1. power the RX from mains 2. connect the antenna It looks to me that you create some kind of loop that picks up the noise. The "loop" might be formed by the coax going to the antenna ---> the antenna earth ---> the protective ground of the mains. There are 2 ways to check wether that is the case: 1. power the RX from battery and connect the mains protective ground to the RX (metal case): now you should have the noise even when running from battery 2. power the RX from mains and be sure to disconnect any other grounding (eg at the antenna feeding point): now you should have no noise 73, Rik ON7YD - OR7T Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm