Return-Path: Received: (qmail 23669 invoked from network); 6 Jul 2003 17:28:10 -0000 Received: from murphys.services.quay.plus.net (212.159.14.225) by mailstore with SMTP; 6 Jul 2003 17:28:10 -0000 Received: (qmail 10584 invoked from network); 6 Jul 2003 17:28:01 -0000 Received: from post.thorcom.com (193.82.116.70) by murphys.services.quay.plus.net with SMTP; 6 Jul 2003 17:28:01 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.14) id 19ZDIt-0001lR-08 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 06 Jul 2003 18:27:59 +0100 Received: from [62.253.164.42] (helo=mta2-svc.business.ntl.com) by post.thorcom.com with esmtp (Exim 4.14) id 19ZDIo-0001lI-Pq for rsgb_lf_group@blacksheep.org; Sun, 06 Jul 2003 18:27:54 +0100 Received: from p4o2b7 ([62.252.204.177]) by mta2-svc.business.ntl.com (InterMail vM.4.01.03.37 201-229-121-137-20020806) with SMTP id <20030706172754.SMEI18309.mta2-svc.business.ntl.com@p4o2b7> for ; Sun, 6 Jul 2003 18:27:54 +0100 Message-ID: <000001c343db$8cb86760$5967fea9@p4o2b7> From: "Ian Kyle" To: rsgb_lf_group@blacksheep.org Date: Sun, 6 Jul 2003 17:26:16 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: Field strength calcs. Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=0.0 required=5.0tests=noneversion=2.55 X-Spam-Checker-Version: SpamAssassin 2.55 (1.174.2.19-2003-05-19-exp) X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Shortly before the 73 KHz band was withdrawn I managed to get some measurements made but the resulting calcs based on PA0SE in the LF book and Terman are giving very pecuiar results for radiated power. When making the signal strength measurements using a loop antenna should this be resonated or aperiodic? I made measurements under both conditions but the results are puzzling - even allowing for my peripatetic decimal point! Anyway I'll be doing it all again on 136 some of these days, but at the moment there are other things more pressing. If anyone is still interested I hope to have a final report on " the Mystery of the Missing Amps" shortly. 73, Ian