Return-Path: Received: from mtain-mp05.r1000.mx.aol.com (mtain-mp05.r1000.mx.aol.com [172.29.193.73]) by air-db08.mail.aol.com (v129.10) with ESMTP id MAILINDB083-864a4dde4cfe26e; Thu, 26 May 2011 08:52:14 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mp05.r1000.mx.aol.com (Internet Inbound) with ESMTP id C7E5E380000C0; Thu, 26 May 2011 08:52:12 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QPa1d-0002L7-Fo for rs_out_1@blacksheep.org; Thu, 26 May 2011 13:50:53 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QPa1d-0002Ky-4T for rsgb_lf_group@blacksheep.org; Thu, 26 May 2011 13:50:53 +0100 Received: from relay.uni-heidelberg.de ([129.206.100.212]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1QPa1c-00072r-GP for rsgb_lf_group@blacksheep.org; Thu, 26 May 2011 13:50:53 +0100 Received: from extmail.urz.uni-heidelberg.de (extmail.urz.uni-heidelberg.de [129.206.100.140]) by relay.uni-heidelberg.de (8.14.1/8.14.1) with ESMTP id p4QCooeY018946 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 26 May 2011 14:50:51 +0200 Received: from [129.206.205.138] (vpn205-138.rzuser.uni-heidelberg.de [129.206.205.138]) by extmail.urz.uni-heidelberg.de (8.13.4/8.13.1) with ESMTP id p4QComqV007395 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 26 May 2011 14:50:49 +0200 Message-ID: <4DDE4CB5.4040803@iup.uni-heidelberg.de> Date: Thu, 26 May 2011 14:51:01 +0200 From: =?ISO-8859-15?Q?Stefan_Sch=E4fer?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.11) Gecko/20100711 Thunderbird/3.0.6 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: LF: 137 kHz groundwave 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=0.0 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: 3039ac1dc1494dde4cfb45f7 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) LF, I just sent some CQ calls on 137.71 kHz and saw the signal at about the same strength on the G4WGT grabber in 910 km, O copy. But there is no trace at all on the YO/4X1RF grabber in 1426 km (in QRSS-10). The 137 kHz groundwave seems to "stop" somewhere between these distances, maybe arround 1000km. I'm sure some of you have some better theoretical and/or practical experience about that? Another advantage of VLF,where it's "easy" to reach 2500 km and above anytime :-) 73, Stefan/DK7FC