Return-Path: Received: (qmail 25604 invoked from network); 15 Nov 2002 13:07:18 -0000 Content-Transfer-Encoding: 8bit Received: from murphys.services.quay.plus.net (212.159.14.225) by mailstore with SMTP; 15 Nov 2002 13:07:18 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 17744 invoked from network); 15 Nov 2002 13:06:41 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.70) by murphys.services.quay.plus.net with SMTP; 15 Nov 2002 13:06:41 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.10) id 18CgAF-0006DD-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Nov 2002 13:05:39 +0000 Received: from [212.164.44.2] (helo=astral.omskcity.com) by post.thorcom.com with esmtp (Exim 4.10) id 18CgAE-0006D0-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Nov 2002 13:05:38 +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 TAA3dd4f09b495b for ; Fri, 15 Nov 2002 19:03:23 +0600 (OS) Date: Fri, 15 Nov 2002 19:03:12 +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,EMAIL_ATTRIBUTION,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, Mike and Group. On Thu, 14 Nov 2002, WE0H wrote: > Hi Alex, > We use vertical loops here. The trees don't affect them much. I can walk up > to my loop and watch the RF current meter and not see any change until I get > closer than 1 foot from the loop and then it drops a little. They work nice > with all my trees in my yard. It seems to me the problem loop vs vertical requre to solve very worth problem pointed as folows. Certanly if one increase diameter of wire (may be long flat band?) effectivity of a loop should be increased also. But if wire diameter is very (!!!) large then enviroment (ground also) losses became significal. If the coper resistance is less then enviroment loss resistance it is no reason to increase wire diameter more. So enviroment loss give a physical limit of loop effectivity. But what is this physical limit? How much one should increase wire diameter? Enviroment loss is not large but what it's value? It is very worth... It seems distance of loop from the ground and loop dimensions should affect very much to ground loss of a loop and then to required wire diameter. Quantative study of this mater should be very usefull. 73 de RA9MB/Alex http://www.qsl.net/ra9mb