Return-Path: Received: (qmail 22991 invoked from network); 20 Oct 2002 15:27:59 -0000 Received: from marstons.services.quay.plus.net (212.159.14.223) by mailstore with SMTP; 20 Oct 2002 15:27:59 -0000 Received: (qmail 9819 invoked by uid 10001); 20 Oct 2002 16:31:43 -0000 Received: from post.thorcom.com (193.82.116.70) by marstons.services.quay.plus.net with SMTP; 20 Oct 2002 16:31:43 -0000 Received: from majordom by post.thorcom.com with local (Exim 4.10) id 183Hyv-0000dp-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 20 Oct 2002 16:27:09 +0100 Received: from [194.73.73.81] (helo=tungsten.btinternet.com) by post.thorcom.com with esmtp (Exim 4.10) id 183Hyv-0000dd-00 for rsgb_lf_group@blacksheep.org; Sun, 20 Oct 2002 16:27:09 +0100 Received: from host213-122-43-32.in-addr.btopenworld.com ([213.122.43.32] helo=jackie) by tungsten.btinternet.com with smtp (Exim 3.22 #8) id 183Hyu-000248-00 for rsgb_lf_group@blacksheep.org; Sun, 20 Oct 2002 16:27:08 +0100 Message-ID: <004701c2784d$478971c0$202b7ad5@jackie> From: "Steve Thompson" To: rsgb_lf_group@blacksheep.org References: <000c01c27787$566bf080$1b6868d5@oemcomputer> <000d01c26dd1$fe11b140$fe78a8c0@W1KW> Date: Sun, 20 Oct 2002 16:28:01 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: Re: Re: Re: Ant Questions Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=-0.3 required=5.0tests=QUOTED_EMAIL_TEXT,REFERENCES,SPAM_PHRASE_00_01, USER_AGENT_OEversion=2.42 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group ----- Original Message ----- From: Holger 'Geri', DK8KW To: Sent: 07 October 2002 08:20 Subject: LF: Re: Re: Ant Questions > Hello > > >Do not be tempted to droop > > the ends of any top wires. > > ... I challenge that. My umbrella antenna 18m high with 5 pieces of top-load > radials sloping downwards (each about 7 m long) works fine (see sketch at > http://www.qru.de/station.htm), with an antenna "gain" of roughly - 30 dB. > One of the key factors that had increased my ERP was to put up my loading > coil 1/3 way up the fiberglas mast so that any losses occuring due to high > voltages due to surrounding trees and walls are reduced. Firstly I have to admit that my comments are based more on 'thinking about it' than actually getting wires in the sky. I found time spent working through ON7YD's pages on aerials (takes a while to do it thoroughly) was well spent and I came away with a much better understanding of what matters. There's a section (or maybe a link to a piece) on top loading wires with some calculated examples of the benefit of top loading wires even if they hang downwards a bit. Steve