Return-Path: Received: (qmail 23591 invoked from network); 14 May 2002 11:13:37 -0000 Content-Transfer-Encoding: 8bit X-Priority: 3 Received: from unknown (HELO murphys-inbound.services.quay.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 14 May 2002 11:13:37 -0000 X-MSMail-Priority: Normal Received: (qmail 13468 invoked from network); 14 May 2002 11:13:26 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from unknown (HELO post.thorcom.com) (193.82.116.70) by murphys.services.quay.plus.net with SMTP; 14 May 2002 11:13:26 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 177aCm-0008Kc-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 14 May 2002 12:10:56 +0100 Received: from astral.infomsk.ru ([212.164.44.2] helo=astral.omskcity.com) by post.thorcom.com with esmtp (Exim 3.33 #2) id 177aCl-0008KR-00 for rsgb_lf_group@blacksheep.org; Tue, 14 May 2002 12:10:55 +0100 Received: from fitec.omskcity.com (mu06.dialup2.infomsk.ru [212.164.44.118]) by astral.omskcity.com (8.9.3/8.9.3) with SMTP id SAA3ce0f07f22a8 for ; Tue, 14 May 2002 18:09:51 +0700 (OSS) Date: Tue, 14 May 2002 18:50:12 +0000 (GMT) From: "Alexander S. Yurkov" To: rsgb_lf_group@blacksheep.org Subject: RE: LF: Ground loss In-reply-to: <3.0.1.16.20020514104945.21f7a680@pb623250.kuleuven.be> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi, Rik! On Tue, 14 May 2002, Rik Strobbe wrote: > I believe the limitations of the formula probably are : > 1.The ratio Lant/Lcp should not be too big or small. Increasing Lcp far > beyond Lant won't be a great help. On the other hand, even with Lcp = 0 (no > cointerpoise wire) the loss resistance will not be endless If Lcp=0 this means that ground wire only touch to the ground in infinity small point. So R should be infinity large. If there is no conterpoint Lcp is a ground rod length. > 2. S (ground conductivity) should not be too large or too small. If S is > too large (eg. salt water) the counterpoise won't be of much use. On the > other side even for s = 0 (worst soil you can think of) R won't be endless > as the counterpoise will still work. Certenly, this is a real problem... One more quation, Rik. Do You get formula I sent to Group for rectangular loop inductance? I am not sure You get it... 73 de RA9MB/Alex http://www.qsl.net/ra9mb