Return-Path: Received: (qmail 34051 invoked from network); 22 Nov 2004 00:08:01 -0000 Received: from unknown (HELO ptb-spamcore02.plus.net) (192.168.71.3) by ptb-mailstore02.plus.net with SMTP; 22 Nov 2004 00:08:01 -0000 Received: from mailnull by ptb-spamcore02.plus.net with spamcore-l-b (Exim 4.32; FreeBSD) id 1CW1kJ-0009rm-LG for dave@picks.force9.co.uk; Mon, 22 Nov 2004 00:07:55 +0000 Received: from [192.168.67.1] (helo=ptb-mxcore01.plus.net) by ptb-spamcore02.plus.net with esmtp (Exim 4.32; FreeBSD) id 1CW1kJ-0009rj-Ip for dave@picks.force9.co.uk; Mon, 22 Nov 2004 00:07:55 +0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1CW1kO-0003gX-KU for dave@picks.force9.co.uk; Mon, 22 Nov 2004 00:08:00 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1CW1js-0004QL-QE for rs_out_1@blacksheep.org; Mon, 22 Nov 2004 00:07:28 +0000 Received: from [193.82.116.30] (helo=relay.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1CW1js-0004QC-EF for rsgb_lf_group@blacksheep.org; Mon, 22 Nov 2004 00:07:28 +0000 Received: from smtp812.mail.ukl.yahoo.com ([217.12.12.202]) by relay.thorcom.net with smtp (Exim 4.41) id 1CW1jo-0001og-VK for rsgb_lf_group@blacksheep.org; Mon, 22 Nov 2004 00:07:28 +0000 Received: from unknown (HELO Main) (Alan.Melia@81.135.128.120 with login) by smtp812.mail.ukl.yahoo.com with SMTP; 22 Nov 2004 00:07:17 -0000 Message-ID: <000e01c4d027$452b8b00$6507a8c0@Main> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org References: <90.514dcae7.2ed2744d@aol.com> Date: Mon, 22 Nov 2004 00:07:29 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 X-SPF-Result: relay.thorcom.net: 217.12.12.202 is neither permitted nor denied by domain of btinternet.com X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1 Subject: LF: Re: Estimating CFH's radiated power Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com 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-Spam-Filtered: by PlusNet SpamCORE (v3.00) Hi Markus the output power of CFH is supposed to be 25kW into an 80% efficient aerial system (my 20kW erp estimate) Reg, G4FGQs program GROUNDWAV3 gives a spreading loss of 62.5dB when I add your estimate of 8dB for the 200km of poor ground I get an estimate of 290uV/m at John's site ?? This is a lot closer that I would have expected. Cheers de Alan G3NYK ----- Original Message ----- From: To: Sent: 21 November 2004 22:44 Subject: LF: Estimating CFH's radiated power Dear John and group, ok, I'll try... One kilowatt EMRP across 700 km of lossless flat earth would give 109.6 - 20 log (697) dBµV/m = 52.6 dBµV/m.