Return-Path: Received: (qmail 649 invoked from network); 15 Nov 2002 05:29:18 -0000 Content-Transfer-Encoding: 8bit Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 15 Nov 2002 05:29:18 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 16218 invoked from network); 15 Nov 2002 04:27:38 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.70) by warrior.services.quay.plus.net with SMTP; 15 Nov 2002 04:27:38 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.10) id 18CY41-0004he-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Nov 2002 04:26:41 +0000 Received: from [212.164.44.2] (helo=astral.omskcity.com) by post.thorcom.com with esmtp (Exim 4.10) id 18CY40-0004hU-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Nov 2002 04:26:40 +0000 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 KAA3dd476a1601d for ; Fri, 15 Nov 2002 10:22:57 +0600 (OS) Date: Fri, 15 Nov 2002 10:22:45 +0000 (GMT) From: "Alexander S. Yurkov" To: rsgb_lf_group@blacksheep.org In-reply-to: Message-ID: MIME-Version: 1.0 Subject: Re: LF: RE: Re: RE: Loop vs Marconi Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Spam-Status: No, hits=0.8 required=5.0tests=DATE_IN_FUTURE_03_06,IN_REP_TO,SPAM_PHRASE_00_01, USER_AGENT_PINEversion=2.42 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Hi, Group. On Thu, 14 Nov 2002, Ashlock,William wrote: > > >A canopy of trees will also effect a loop antenna, try a 50 ft vertical and > >gain 6dbs and you will probably still be on the plus side even with some > >attenuation from the trees. > > You sir, are absolutely WRONG! > > A spent 100s of hours on my vertical antennas before changing over to loops. It seems to me a loop (if wire diameter is large) may be bit better then vertical of same dimension if there are lot of enviroment losses (many trees and so on). Loop should be less sensetive to enviroment then vertical. But in clear space vertical should be better. Generally by increasing wire diameter one can increase loop effectivity. Unfortutenly You can't increse vertical effectivity in such a way. Any way comprehensive study of the problem (vertical versus loop) seems to be very worth and interesting. But this require lot of work both experimental as theoretical. Hoprisontal loop can not be effective because it will produce strong current in the ground and loss should be hight. 73 de RA9MB/Alex http://www.qsl.net/ra9mb