Return-Path: Received: from mtain-md03.r1000.mx.aol.com (mtain-md03.r1000.mx.aol.com [172.29.96.87]) by air-ma08.mail.aol.com (v129.10) with ESMTP id MAILINMA083-b5324dc135b0103; Wed, 04 May 2011 07:17:04 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-md03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 1D44D3800048E; Wed, 4 May 2011 07:17:02 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QHa3R-0006vF-35 for rs_out_1@blacksheep.org; Wed, 04 May 2011 12:15:41 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QHa3Q-0006v6-O0 for rsgb_lf_group@blacksheep.org; Wed, 04 May 2011 12:15:40 +0100 Received: from relay.uni-heidelberg.de ([129.206.100.212]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1QHa3P-00012C-Jr for rsgb_lf_group@blacksheep.org; Wed, 04 May 2011 12:15:40 +0100 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay.uni-heidelberg.de (8.14.1/8.14.1) with ESMTP id p44BFccA006466 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 4 May 2011 13:15:38 +0200 Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de [129.206.22.206]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id p44BFcQO006937 for ; Wed, 4 May 2011 13:15:38 +0200 Message-ID: <4DC13500.4070702@iup.uni-heidelberg.de> Date: Wed, 04 May 2011 13:14:08 +0200 From: =?ISO-8859-2?Q?Stefan_Sch=E4fer?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <4DC0E8DA.4070402@talktalk.net> In-Reply-To: <4DC0E8DA.4070402@talktalk.net> X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: LF: G3ZJO grabber Content-Type: text/plain; charset=ISO-8859-2; 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-global-disposition: G x-aol-sid: 3039ac1d60574dc135ae19a6 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) Hello Eddie, VLF, Your additional grabber windows are interesting. Remembers me to the site of Renato Romero ;-) What antenna do you use for displaying the range of 0...50 Hz? My probe circuit has a high pass filter with an edge frequency of about 3 kHz. So if your QRM below 3 kHz is not to strong, you may remove that and get better signals on ELF. Have you ever received the ZEVS at 82 Hz? http://www.vlf.it/zevs/zevs.htm 73, Stefan/DK7FC