Return-Path: Received: (qmail 18006 invoked from network); 26 Jul 1999 08:59:24 +0100 Received: from magnus.plus.net.uk (HELO magnus.force9.net) (195.166.128.27) by guiness.force9.net with SMTP; 26 Jul 1999 08:59:24 +0100 Received: (qmail 27927 invoked from network); 26 Jul 1999 08:01:58 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by magnus.plus.net.uk with SMTP; 26 Jul 1999 08:01:58 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 118fVw-0005NJ-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 26 Jul 1999 08:49:36 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from mailserv.cc.kuleuven.ac.be ([134.58.8.44]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 118fVv-0005NE-00 for rsgb_lf_group@blacksheep.org; Mon, 26 Jul 1999 08:49:35 +0100 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mailserv.cc.kuleuven.ac.be (8.9.0/8.9.0) with SMTP id JAA11402 for ; Mon, 26 Jul 1999 09:55:14 +0200 Message-ID: <3.0.1.16.19990726095047.2eff9c40@mail.cc.kuleuven.ac.be> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Mon, 26 Jul 1999 09:50:47 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: Ground systems In-reply-to: <3798E3DD.2907@xtra.co.nz> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org Sender: At 09:51 24/07/99 +1200, ZL2CA wrote: >Connecting the mains earth to the RF earth INCREASED THE RF RESISTANCE >OF THE ANTENNA. I (and others) experienced the same. I think that this increase could be explained by the fact that the 'returning' current coming from the 'radial-earth' and from the 'mains-earth' have different phase, so simple 'resistor-wise' paralleling of both earthsystems is not valid. If the phase-difference between both currents is large enough the resulting total current will be less than the current from 1 system only. Or said otherwise the total resistance will increase instead of decrease. Would be interesting if not only the currents in both earthsystems but also their phasedifference could be measured. 73, Rik Rik Strobbe ON7YD rik.strobbe@fys.kuleuven.ac.be Villadreef 14 B-3128 Baal BELGIUM (JO20IX)