Return-Path: Received: (qmail 7007 invoked from network); 4 Jun 2001 23:20:01 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 4 Jun 2001 23:20:01 -0000 Received: (qmail 12485 invoked from network); 4 Jun 2001 23:19:35 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 4 Jun 2001 23:19:35 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 1573ZI-0002v6-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Jun 2001 00:15:28 +0100 Received: from latimer.mail.uk.easynet.net ([195.40.1.40]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 1573ZH-0002v1-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Jun 2001 00:15:27 +0100 Received: from ericadodd (tnt-18-122.easynet.co.uk [212.134.224.122]) by latimer.mail.uk.easynet.net (Postfix) with SMTP id EEB28536D8 for ; Tue, 5 Jun 2001 00:14:45 +0100 (BST) Message-ID: <000201c0ed4c$cd50dce0$7ae086d4@ericadodd> From: "g3ldo" To: rsgb_lf_group@blacksheep.org References: <002301c0ecd6$5f5d9960$ed25893e@g3aqc> Subject: LF: Re: Re. 73KHz tests Date: Mon, 4 Jun 2001 11:35:49 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Laurie said: >Thanks Ko for the report.glad you saw us. Yes, Ko's report was very useful. From his field strength readings we should be able to make some good estimates of relative transmitted power. Laurie and I only live a few km apart and we are both located close to the sea. >Thanks Peter for the comments on the B.09 K Amp.I think I must be getting >600/700 W since my Ant current is 3.5A (ground loss probably twice that on 136 >say 70/80 ohms). EZNEC gives a Rres of 0.2ohms for my antenna so Rad.pwr is >about 250mW.But measurment on 136 indicate only half radiated so I recon >125mW ERP at best. I have calculated my Rres on EZNEC as .01 ohms and with a antenna of 1.5A this gives me a radiated power of 23.2mW. Would the 8dB difference observed by Ko account for this? Regards, Peter, G3LDO e-mail Web