Return-Path: Received: (qmail 20017 invoked from network); 29 Mar 2002 19:18:09 -0000 Received: from unknown (HELO murphys-inbound.services.quay.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 29 Mar 2002 19:18:09 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 9959 invoked from network); 29 Mar 2002 19:18:06 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys.services.quay.plus.net with SMTP; 29 Mar 2002 19:18:06 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 16r3MR-0001XI-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Mar 2002 20:52:35 +0000 Received: from mailhost.netscapeonline.co.uk ([194.201.52.152]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 16r3MQ-0001XD-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Mar 2002 20:52:34 +0000 Received: from ldsas04-68-119-56.cw-visp.com ([212.137.119.56] helo=netscapeonline.co.uk) by mailhost.netscapeonline.co.uk with esmtp (Exim 3.34 #1) id 16r1dL-0000SO-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Mar 2002 19:01:56 +0000 Message-ID: <3CA4B3CB.46478EC7@netscapeonline.co.uk> Date: Fri, 29 Mar 2002 18:34:51 +0000 From: "gii3kev" Organization: Netscape Online member X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win95; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: "rsgb rsgb" Subject: LF: loops Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: The only accurate way to measure loop inductance for an installation is to use an inductance meter. Calculations do not take into account the loop environment like trees and other objects in the vicinity. The same applies to natural resonant frequency, the loop or any other antenna needs to be measured in situ, calculations for real situations can be totally different from theoritical values. This is where a lot are going wrong on LF. The theoritical and practical results including power measurements are often totally wrong when calculated as opposed to being measured in the field. 73 de Mal/G3KEV