Return-Path: Received: (qmail 14824 invoked from network); 5 Aug 2003 08:28:23 -0000 Received: from murphys.services.quay.plus.net (212.159.14.225) by netmail00.services.quay.plus.net with SMTP; 5 Aug 2003 08:28:23 -0000 Received: (qmail 21883 invoked from network); 5 Aug 2003 08:28:11 -0000 Received: from post.thorcom.com (193.82.116.70) by murphys.services.quay.plus.net with SMTP; 5 Aug 2003 08:28:11 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.14) id 19jxAE-0002eU-QL for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Aug 2003 09:27:26 +0100 Received: from [62.253.162.47] (helo=mta07-svc.ntlworld.com) by post.thorcom.com with esmtp (Exim 4.14) id 19jx9z-0002eF-JC for rsgb_lf_group@blacksheep.org; Tue, 05 Aug 2003 09:27:11 +0100 Received: from mike1 ([80.4.107.45]) by mta07-svc.ntlworld.com (InterMail vM.4.01.03.37 201-229-121-137-20020806) with SMTP id <20030805082708.PBGW27190.mta07-svc.ntlworld.com@mike1> for ; Tue, 5 Aug 2003 09:27:08 +0100 Message-ID: <000601c35b2b$db77f8e0$2602a8c0@WorkGroup> From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org References: Date: Tue, 5 Aug 2003 09:30:41 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: Re: Radials Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=-1.0 required=5.0tests=QUOTED_EMAIL_TEXT,REFERENCESversion=2.55 X-Spam-Checker-Version: SpamAssassin 2.55 (1.174.2.19-2003-05-19-exp) X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false > The site here is surrounded by cotton woods, birches and firs. This evening > I put out few 1/4Y radials, Yep some 550 meters in length each, but theyve > done nothing/zilch to probably override the lossyness of this site to local > flora and sometime fauna, but I had to try; Still 2-3 amps is 2-3 amps, and > Im wondering how long it is before the beacon is heard somewhere. > Laurence KL1X/WD2XDW Anchorage This test tends to confirm that what we call "earth losses" are often not actually due to the resistance of the earth connection, but to absorption by vegetation, buildings and even hills. I once ran out a long radial - though only 300m - and that did not improve my 100-ohm loss. It appears that the site is of great importance, and there is a practical limit to the antenna 'gain' at any location. Factors such as height and ground covered by the capacity hat are still worth improving if possible, though in many urban areas these are limited by space and neighbours. Mike, G3XDV http://www.lf.thersgb.net ====================