Return-Path: Received: (qmail 31803 invoked from network); 13 Dec 2002 07:41:53 -0000 Received: from netmail01.services.quay.plus.net (212.159.14.219) by mailstore with SMTP; 13 Dec 2002 07:41:53 -0000 Received: (qmail 15351 invoked by uid 10001); 13 Dec 2002 07:42:46 -0000 Received: from post.thorcom.com (193.82.116.70) by netmail01.services.quay.plus.net with SMTP; 13 Dec 2002 07:42:45 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.10) id 18MkSR-0005wB-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 13 Dec 2002 07:42:03 +0000 Received: from [62.253.164.41] (helo=mta1-svc.business.ntl.com) by post.thorcom.com with esmtp (Exim 4.10) id 18MkSR-0005w2-00 for rsgb_lf_group@blacksheep.org; Fri, 13 Dec 2002 07:42:03 +0000 Received: from jackie ([217.137.94.2]) by mta1-svc.business.ntl.com (InterMail vM.4.01.03.27 201-229-121-127-20010626) with SMTP id <20021213074145.XOBN277.mta1-svc.business.ntl.com@jackie> for ; Fri, 13 Dec 2002 07:41:45 +0000 Message-ID: <004401c2a27b$88f91ea0$025e89d9@jackie> From: "Steve Thompson" To: rsgb_lf_group@blacksheep.org References: Date: Fri, 13 Dec 2002 07:44:56 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: Re: LF: Antenna tests Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=-0.3 required=5.0tests=QUOTED_EMAIL_TEXT,REFERENCES,SPAM_PHRASE_00_01, USER_AGENT_OEversion=2.42 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group ----- Original Message ----- From: G4WGT To: Sent: 12 December 2002 21:43 Subject: RE: LF: Antenna tests > Hi Hugh, > > Not a dumb question if you don't know the answer. > > I would also like to know how to measure the earth resistance or series loss > resistance of my antenna when it is finally completed and also what it tells > us about the system. As opposed to a floating rf bridge, there's some stuff on G4FGQ's site - a couple of progs related to earthing resistance issues. They include copious notes, including describing measuring soil rho with 50Hz low voltage, then calculating earth resistance. Does this work - are the results reasonable? It seems to me that earth resistance in isolation is not all that valuable - the ratio of radiation resistance to earth and total loss resistance feels more useful. Steve