Return-Path: Received: from rly-da03.mx.aol.com (rly-da03.mail.aol.com [172.19.129.77]) by air-da07.mail.aol.com (v123.4) with ESMTP id MAILINDA071-a5d4a2bad246b; Sun, 07 Jun 2009 08:05:58 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-da03.mx.aol.com (v123.4) with ESMTP id MAILRELAYINDA035-a5d4a2bad246b; Sun, 07 Jun 2009 08:05:57 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1MDH7T-0007ZH-Ft for rs_out_1@blacksheep.org; Sun, 07 Jun 2009 13:04:59 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1MDH7T-0007Z8-4Q for rsgb_lf_group@blacksheep.org; Sun, 07 Jun 2009 13:04:59 +0100 Received: from c2bthomr04.btconnect.com ([213.123.20.122]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1MDH7Q-0003K9-JD for rsgb_lf_group@blacksheep.org; Sun, 07 Jun 2009 13:04:58 +0100 Received: from [192.168.1.64] (host86-130-168-40.range86-130.btcentralplus.com [86.130.168.40]) by c2bthomr04.btconnect.com with ESMTP id KZK24802; Sun, 7 Jun 2009 13:04:51 +0100 (BST) Message-ID: <4A2BACE6.20409@btconnect.com> Date: Sun, 07 Jun 2009 13:04:54 +0100 From: Richard Newstead User-Agent: Thunderbird 2.0.0.21 (Windows/20090302) MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <4A2B7CC7.4020002@btconnect.com> <002501c9e75e$10131d40$0900a8c0@AM> In-Reply-To: <002501c9e75e$10131d40$0900a8c0@AM> X-Junkmail-Status: score=10/50, host=c2bthomr04.btconnect.com X-Junkmail-SD-Raw: score=unknown, refid=str=0001.0A09020B.4A2BACE3.0229,ss=1,fgs=0, ip=192.168.1.64, so=2007-10-30 19:00:17, dmn=5.7.1/2009-05-14 X-Junkmail-IWF: false X-Karma: unknown: X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: Re: 500kHz Diurnal Noise Variation Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit 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-Mailer: Unknown (No Version) Alan Melia wrote: > Hi Richard, > I think the noise variation is very similar to that on 136k Hi Alan Thanks for the analysis. I was actually thinking more of locally generated electrical noise - hence the reference to Sundays. I recall doing some test with Peter G3PLX years ago. We conducted them on Christmas Day in the hope that some propagated industrial noise would be less. That was HF not MF though. 73 Richard G3CWI