Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mh05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 43E4C38000126; Fri, 22 Jul 2011 04:00:22 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QkAd2-00009g-BD for rs_out_1@blacksheep.org; Fri, 22 Jul 2011 08:58:36 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QkAd1-00009X-F0 for rsgb_lf_group@blacksheep.org; Fri, 22 Jul 2011 08:58:35 +0100 Received: from outbound04.telus.net ([199.185.220.223] helo=defout.telus.net) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1QkAcy-0005yl-KH for rsgb_lf_group@blacksheep.org; Fri, 22 Jul 2011 08:58:35 +0100 Received: from edtncm03 ([199.185.220.221]) by priv-edtnes27.telusplanet.net (InterMail vM.8.01.03.00 201-2260-125-20100507) with ESMTP id <20110722075829.GQZX1740.priv-edtnes27.telusplanet.net@edtncm03> for ; Fri, 22 Jul 2011 01:58:29 -0600 Received: from [192.168.1.115] ([75.157.128.46]) by edtncm03 with bizsmtp id AvyU1h00l10BwtX01vyU85; Fri, 22 Jul 2011 01:58:29 -0600 X-Telus-Outbound-IP: 75.157.128.46 X-Authority-Analysis: v=1.1 cv=jQecjTLvkVOfO0RXIOi7G8FjOjm8bD+DWsRFYIkvbQI= c=1 sm=2 a=qGV6uSQ7kSsA:10 a=_K5F0-AsBoQA:10 a=LGgl8L9ij00A:10 a=jPJDawAOAc8A:10 a=N659UExz7-8A:10 a=cqvmlmxeAAAA:8 a=aatUQebYAAAA:8 a=zCXF_t016kIyIAsGVK8A:9 a=_bX8V60ZjIRpwcrtBbsA:7 a=pILNOxqGKmIA:10 Message-ID: <4E292DA4.3090507@telus.net> Date: Fri, 22 Jul 2011 00:58:28 -0700 From: Scott Tilley User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:5.0) Gecko/20110624 Thunderbird/5.0 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org X-Spam-Score: 3.0 (+++) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426,SUBJECT_ENCODED_TWICE=1.543 Subject: LF: Mitigation of =?windows-1252?Q?50=9660_Hz_power_line_int?= =?windows-1252?Q?erference=2Cin_geophysical_data?= Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit 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-SCOLL-SCORE: 0:2:433735104:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d60d94e292e160c21 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hi All He's a VERY interesting paper on something we can all relate to. "Mitigation of 50–60 Hz power line interference,in geophysical data" http://vlf.stanford.edu/sites/default/files/publications/2010-26.pdf Has anyone explored these ideas in amateur work? 73 Scott VE7TIL http://www3.telus.net/sthed/argo/