Return-Path: Received: (qmail 29361 invoked from network); 25 May 2002 16:03:30 -0000 Content-Transfer-Encoding: 8bit X-Priority: 3 Received: from unknown (HELO marstons.services.quay.plus.net) (212.159.14.223) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 25 May 2002 16:03:30 -0000 X-MSMail-Priority: Normal Received: (qmail 26861 invoked by uid 10001); 25 May 2002 16:07:23 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from unknown (HELO post.thorcom.com) (193.82.116.70) by marstons.services.quay.plus.net with SMTP; 25 May 2002 16:07:23 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 17BdyC-0005sD-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 25 May 2002 17:00:40 +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 17BdyA-0005rb-00 for rsgb_lf_group@blacksheep.org; Sat, 25 May 2002 17:00:38 +0100 Received: from fitec.omskcity.com (mu01.dialup2.infomsk.ru [212.164.44.113]) by astral.omskcity.com (8.9.3/8.9.3) with SMTP id WAA3cefb4fe4fb7 for ; Sat, 25 May 2002 22:59:58 +0700 (OSS) Date: Sat, 25 May 2002 23:40:38 +0000 (GMT) From: "Alexander S. Yurkov" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Ground loss for different length In-reply-to: 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 Group. I sould someone to add. On Sat, 25 May 2002, Alexander S. Yurkov wrote: > only for elevated conterpoise. The formula is: > > > R=(1/(pi*s) * [(1/la)*ln( (H+h)/(2*H) ) + (1/lc)*ln( (H+h)/(2*h) )] > > where > la - antenna length, > lc - conterpoise length. > Other notations are the same then previously. > > If lc=la then the formula obviously became the same then previous one. If lc >> la the formula is not right. Charge distributing seems to be not homogenious. Sorry, I have not notice some problems at first. But if lc ~< la may be OK. It's should be tested and may be the formula should be modified. PSE do not use it now. Sorry again. 73 de RA9MB/Alex http://www.qsl.net/ra9mb