Return-Path: Received: (qmail 29239 invoked from network); 10 Oct 2002 12:44:55 -0000 Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 10 Oct 2002 12:44:55 -0000 Received: (qmail 20566 invoked from network); 10 Oct 2002 12:44:17 -0000 X-MSMail-Priority: Normal Received: from post.thorcom.com (193.82.116.70) by warrior.services.quay.plus.net with SMTP; 10 Oct 2002 12:44:17 -0000 Received: from majordom by post.thorcom.com with local (Exim 4.10) id 17zcaP-0001Vm-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 10 Oct 2002 13:38:41 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [80.68.3.204] (helo=relay.dx.ru) by post.thorcom.com with smtp (Exim 4.10) id 17zcaM-0001Vd-00 for rsgb_lf_group@blacksheep.org; Thu, 10 Oct 2002 13:38:39 +0100 Received: (qmail 41629 invoked from network); 10 Oct 2002 16:38:34 +0400 Received: from ed.dx (10.0.1.11) by gw.dx with SMTP; 10 Oct 2002 16:38:34 +0400 Date: Thu, 10 Oct 2002 16:39:05 +0300 From: "Ed Lesnichy" X-Mailer: The Bat! (v1.60q) Personal Organization: Ed Lesnichy X-Priority: 3 Message-ID: <14326676323.20021010163905@dx.ru> To: "Alan Melia" In-reply-to: <000a01c27054$a6839440$2abe01d5@main> References: <000a01c27054$a6839440$2abe01d5@main> MIME-Version: 1.0 Subject: Re: LF: RU6LWZ report Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=-2.0 required=5.0tests=EMAIL_ATTRIBUTION,IN_REP_TO,NOSPAM_INC,REFERENCES, SPAM_PHRASE_00_01,USER_AGENT_THEBATversion=2.42 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Hello Alan! Thursday, October 10, 2002, 3:00:01 PM, you wrote: AM> Hi all, a quick crude calucation from Ed's drawing suggests that the Rrad of AM> the aerial he was using could well have been in the order of 6 to 7 ohms. AM> This would result in an ERP of about 35 to 45 watts with 2.5 amp of aerial AM> current. I think that: Rrad = 1600*(H effective/lamb)^2= 1600*(80...100/2200)^2=2...3 Ohm P = I^2*Rrad=2.5^2*(2...3)=12.5...18.75w ERP but the aerial is close located to a metal mast... but...but... but Poutput=40..50w 73! Ed RU6LA ed@dx.ru