Return-Path: Received: from mtain-da04.r1000.mx.aol.com (mtain-da04.r1000.mx.aol.com [172.29.64.76]) by air-df04.mail.aol.com (v129.4) with ESMTP id MAILINDF043-5ef04cd31903b4; Thu, 04 Nov 2010 16:35:15 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-da04.r1000.mx.aol.com (Internet Inbound) with ESMTP id B75FC3800015F; Thu, 4 Nov 2010 16:35:13 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PE6Uk-0003Vn-VM for rs_out_1@blacksheep.org; Thu, 04 Nov 2010 20:33:14 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PE6Uk-0003Ve-Ef for rsgb_lf_group@blacksheep.org; Thu, 04 Nov 2010 20:33:14 +0000 Received: from lon1-post-2.mail.demon.net ([195.173.77.149]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PE6Ui-00040R-UZ for rsgb_lf_group@blacksheep.org; Thu, 04 Nov 2010 20:33:14 +0000 Received: from sighthound.demon.co.uk ([80.177.174.126]) by lon1-post-2.mail.demon.net with esmtp (Exim 4.69) id 1PE6Ui-0001Xt-aa for rsgb_lf_group@blacksheep.org; Thu, 04 Nov 2010 20:33:12 +0000 Received: from svr3.twatt.home (unknown [192.168.21.4]) by svr3.twatt.home (Postfix) with ESMTP id B77221BF0A for ; Thu, 4 Nov 2010 20:33:11 +0000 (GMT) Date: Thu, 4 Nov 2010 20:33:11 +0000 From: gm4slv To: rsgb_lf_group@blacksheep.org Message-ID: <20101104203311.618d5b3e@svr3.twatt.home> In-Reply-To: <2BFB8B83BB3D4704A6C70FE3F877A8FF@PCvanAlbert> References: <4CD1CD51.2010103@kpnmail.nl> <1288819317.4cd1d275cc0bf@imp.netikka.net> <000f01cb7ba6$b2802040$8d01a8c0@JAYDELL> <20101103231846.79a9e9da@opc1> <2BFB8B83BB3D4704A6C70FE3F877A8FF@PCvanAlbert> Organization: The Gammy Bird X-Mailer: Claws Mail 3.7.4 (GTK+ 2.20.1; i486-pc-linux-gnu) Mime-Version: 1.0 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: WSPR window Content-Type: text/plain; charset=US-ASCII 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: 3039ac1d404c4cd319010102 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none On Thu, 4 Nov 2010 10:21:12 +0100 "Albert" wrote: > Jay, LF, > This is just what WSPR is designed for. Albert, Jay, LF, Indeed it is! One last comment, looking at the figures...... In the last 7 days the best reports SNR of a W station on WSPR was : 2010-10-31 04:44 WD2XSH/12 0.501151 -1 0 DM79gx 2 KL7UK/5 EM26ar 903 That's -1dB SNR for 2W ERP at 903km.... Compared to a Eu spot over a simlar path length: 2010-10-28 20:40 PA0A 0.503901 +12 0 JO33de 5 GM4SLV IP90gg 917 +12dB SNR fir 5W ERP at a distance of 917km There were no "super strong groundwave" reports from W stations - in fact nothing in +ve SNR figures at all. The best SNR for a potential Groundwave path was: 2010-10-31 01:52 WD2XSH/17 0.501090 -4 0 FN42pb 1 WE2XGR/2 FN31is 216 A mere -4dB SNR at 216km for a reported ERP of 1W - hardly bending the needle! Once you get to over +10dB then you're starting to talk about a strong signal, but even then not likely to cause any problems. There have been Eu spots up to +17dB this week. All the high SNR spots in the database for the last 7 days are for Eu stations - so I think it's a myth that the W stations running high power to efficient antennas are going to wipe out the band over there. Let's just use it and see how things go. Regards, John GM4SLV