Return-Path: Received: (qmail 19773 invoked from network); 17 Dec 2002 09:50:56 -0000 Received: from murphys.services.quay.plus.net (212.159.14.225) by mailstore with SMTP; 17 Dec 2002 09:50:56 -0000 Received: (qmail 18135 invoked from network); 17 Dec 2002 09:50:53 -0000 Received: from post.thorcom.com (193.82.116.70) by murphys.services.quay.plus.net with SMTP; 17 Dec 2002 09:50:53 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.10) id 18OEMm-0002GF-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 17 Dec 2002 09:50:20 +0000 Received: from [62.253.162.42] (helo=mta02-svc.ntlworld.com) by post.thorcom.com with esmtp (Exim 4.10) id 18OEMh-0002G6-00 for rsgb_lf_group@blacksheep.org; Tue, 17 Dec 2002 09:50:15 +0000 Received: from oemcomputer ([80.4.106.77]) by mta02-svc.ntlworld.com (InterMail vM.4.01.03.27 201-229-121-127-20010626) with SMTP id <20021217095015.NCCM14589.mta02-svc.ntlworld.com@oemcomputer> for ; Tue, 17 Dec 2002 09:50:15 +0000 Message-ID: <003901c2a5b1$cd847680$4d6a0450@oemcomputer> From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org References: Date: Tue, 17 Dec 2002 09:50:59 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: Re: LF: EARTH RESISTANCE 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 > Realy he had mesure earth resistance plus enviroment loss resistance. > Also leak in isolators also yelds a loss. > 73 de RA9MB/Alex I think this is why people are confused. I believe that Dick measured "system loss", which includes all losses except inductor loss. Calling it "earth resistance" simplifies the situation too much. Plainly a wet environment will increase leakages. Has anyone measured earth resistance alone under different conditions? If I recall correctly, this can be done with three earth stakes and Kirchoff's laws. Mike, G3XDV http://www.lf.thersgb.net =================