Return-Path: Received: from mtain-dj04.r1000.mx.aol.com (mtain-dj04.r1000.mail.aol.com [172.19.187.140]) by air-da08.mail.aol.com (v129.4) with ESMTP id MAILINDA083-86404d3aae9b11f; Sat, 22 Jan 2011 05:16:59 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dj04.r1000.mx.aol.com (Internet Inbound) with ESMTP id 8121538000090; Sat, 22 Jan 2011 05:16:58 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PgaVv-0002NK-Pl for rs_out_1@blacksheep.org; Sat, 22 Jan 2011 10:16:11 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PgaVv-0002NB-DQ for rsgb_lf_group@blacksheep.org; Sat, 22 Jan 2011 10:16:11 +0000 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PgaVu-0005WQ-JA for rsgb_lf_group@blacksheep.org; Sat, 22 Jan 2011 10:16:11 +0000 Received: from ix.urz.uni-heidelberg.de (cyrus-portal.urz.uni-heidelberg.de [129.206.100.176]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id p0MAG93O020043 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sat, 22 Jan 2011 11:16:09 +0100 Received: from extmail.urz.uni-heidelberg.de (extmail.urz.uni-heidelberg.de [129.206.100.140]) by ix.urz.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id p0MAG9o7015404 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sat, 22 Jan 2011 11:16:09 +0100 Received: from [147.142.13.42] (vpn513-042.rzuser.uni-heidelberg.de [147.142.13.42]) by extmail.urz.uni-heidelberg.de (8.13.4/8.13.1) with ESMTP id p0MAG8fj008842 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sat, 22 Jan 2011 11:16:08 +0100 Message-ID: <4D3AAE7D.8070309@iup.uni-heidelberg.de> Date: Sat, 22 Jan 2011 11:16:29 +0100 From: =?UTF-8?B?U3RlZmFuIFNjaMOkZmVy?= 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 References: <1295686728.1961.2.camel@gerhard-desktop> <1295690086.1961.8.camel@gerhard-desktop> In-Reply-To: <1295690086.1961.8.camel@gerhard-desktop> X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: VLF transmisssion Content-Type: text/plain; charset=UTF-8; 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: 3039cdbc9d084d3aae9a590b X-AOL-IP: 195.171.43.25 X-Mailer: Unknown (No Version) GM Gerhard, VLF, Am 22.01.2011 10:54, schrieb Gerhard Hickl: > 20db over noise at 40km distance is very good and probably the strongest > signal you have ever seen from me Lubos. That signal should be audible > and enough for CW. I don't think so. I've recorded my own signal from the kite antenna on my grabber in 40.0 km distance ( http://no.nonsense.ee/qthmap/?qth=JN49IS36VH&from=jn49ik00wd ). The SNR was about 40 dB but it wasn't audible. I think 50 dB SNR in 4.5 mHz is necessary to get a R3 audible CW signal, depending on the kind of noise within the CW filter bandwidth. > Local conditions are good, -2 centigrade and in the moment nearly no > wind. I hope wind isn't becoming a problem during the day. > Unfortunately the noise is rather high here in Heidelberg, compared to the last days. No signal visible so far. But we know about the propagation effects in some 100 km distance. Maybe your signal will come up in some hours. Looking forward to that :-) > I will try to keep the TX running until evening. > Good luck Gerhard! 73, Stefan/DK7FC