Return-Path: Received: from mtain-df01.r1000.mx.aol.com (mtain-df01.r1000.mx.aol.com [172.29.64.213]) by air-dc05.mail.aol.com (v129.4) with ESMTP id MAILINDC053-86514c7f74d92aa; Thu, 02 Sep 2010 05:56:41 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-df01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 35B9438000084; Thu, 2 Sep 2010 05:56:40 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Or6WN-0000dh-Tw for rs_out_1@blacksheep.org; Thu, 02 Sep 2010 10:55:51 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Or6WN-0000dY-HW for rsgb_lf_group@blacksheep.org; Thu, 02 Sep 2010 10:55:51 +0100 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Or6WI-0006NG-CP for rsgb_lf_group@blacksheep.org; Thu, 02 Sep 2010 10:55:51 +0100 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id o829u1eO028363 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 2 Sep 2010 11:56:02 +0200 Received: from [129.206.29.99] (pc99.iup.uni-heidelberg.de [129.206.29.99]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id o829tjWQ027265 for ; Thu, 2 Sep 2010 11:55:45 +0200 Message-ID: <4C7F7439.4070604@iup.uni-heidelberg.de> Date: Thu, 02 Sep 2010 11:54:01 +0200 From: =?ISO-8859-1?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: <000a01cb493d$fb8f3410$0401a8c0@xphd97xgq27nyf> <4C7E2046.536.2C4F91@v.d.heide.on-line.de> <002501cb49f0$acabccb0$0401a8c0@xphd97xgq27nyf> <4C7E8D66.2030806@gmx.com> <004701cb49fd$25f18590$0401a8c0@xphd97xgq27nyf> <4C7F639F.1040501@iup.uni-heidelberg.de> In-Reply-To: X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: Re: ELF: ELF! 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-global-disposition: G x-aol-sid: 3039ac1d40d54c7f74d77d85 X-AOL-IP: 193.82.116.20 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) BTW, no one at all is transmitting on ELF (300 Hz... 3 kHz). This makes it a litter harder to evaluate the RX performance... Am 02.09.2010 11:02, schrieb Roger Lapthorn: > Good luck Stefan. > > It will be most interesting to see how far you can get without the > assistance of "utilities conduction" as was the case with my own small > tests in the summer. If my understanding is right you have to get > beyond about 25km to be in the far field at this sort of frequency, so > reception at 40km is a good target. I wonder if the effective loop > size (in the ground) increases because of the increasing skin depth > and signal penetration? If so, the results might be better than expected. > > I can look at these frequencies with the kit I've already used, but > doubt I'd see anything. > > 73s > Roger G3XBM > >