Return-Path: Received: from mtain-md02.r1000.mx.aol.com (mtain-md02.r1000.mx.aol.com [172.29.96.86]) by air-mc05.mail.aol.com (v127_r1.1) with ESMTP id MAILINMC054-a96a4b9385bd2dc; Sun, 07 Mar 2010 05:53:49 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-md02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 7FEEA3800009D; Sun, 7 Mar 2010 05:53:48 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NoE6O-0004NO-6B for rs_out_1@blacksheep.org; Sun, 07 Mar 2010 10:52:52 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NoE6N-0004NF-RI for rsgb_lf_group@blacksheep.org; Sun, 07 Mar 2010 10:52:51 +0000 Received: from parrot.netcom.co.uk ([217.72.171.49]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NoE6K-0002zo-VQ for rsgb_lf_group@blacksheep.org; Sun, 07 Mar 2010 10:52:51 +0000 Received: from abelian.netcom.co.uk (i-194-106-52-83.freedom2surf.net [194.106.52.83]) by parrot.netcom.co.uk (Postfix) with ESMTP id 67696227F65 for ; Sun, 7 Mar 2010 10:50:20 +0000 (GMT) Received: from [127.0.0.1] (localhost [127.0.0.1]) by abelian.netcom.co.uk (8.13.1/8.13.1) with ESMTP id o27AqgCx016167 for ; Sun, 7 Mar 2010 10:52:42 GMT Message-ID: <4B93857A.8090702@abelian.org> Date: Sun, 07 Mar 2010 10:52:42 +0000 From: Paul Nicholson User-Agent: Thunderbird 2.0.0.14 (X11/20080421) MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <4B8CE312.7090904@abelian.org> <20100302110052.BFCD8F3864@smtps02.kuleuven.be> <4B8D015B.10205@abelian.org> <4B8D5529.1060501@abelian.org> In-Reply-To: <4B8D5529.1060501@abelian.org> X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: Re: 9kHz noise level Content-Type: text/plain; charset=ISO-8859-15; 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=0.9 required=5.0 tests=FROM_ENDS_IN_NUMS 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-global-disposition: G x-aol-sid: 3039ac1d60564b9385bc12ae X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) Could be a good day today for 9kHz tests, the background noise is very low. http://abelian.org/vlf/nb.shtml Now shows the amplitude spectrum when the loop pattern is rotated to null the average bearing of the background noise. This is the blue trace, the red trace shows the omnidirectional pattern. Noise floor 6dB lower. Frankfurt signals will be 3dB lower with the prevailing noise bearing of 70/250. Usually the daytime noise is more like 30/210 and with this nulled, Frankfurt will be almost 'on the beam'. Getting closer... -- Paul Nicholson --