Return-Path: Received: (qmail 25622 invoked from network); 25 Apr 1999 15:33:44 +0100 Received: from magnet.plus.net.uk (HELO magnet.force9.net) (195.166.128.26) by guiness.force9.net with SMTP; 25 Apr 1999 15:33:44 +0100 Received: (qmail 30535 invoked from network); 25 Apr 1999 14:34:06 -0000 Received: from post.thorcom.com (194.75.130.70) by magnet.plus.net.uk with SMTP; 25 Apr 1999 14:34:06 -0000 Received: from troy.blacksheep.org ([194.75.183.50] ident=root) by post.thorcom.com with esmtp (Exim 2.04 #3) id 10bPrW-0003OK-00; Sun, 25 Apr 1999 15:26:26 +0100 Received: (from root@localhost) by troy.blacksheep.org (8.6.12/8.6.12) id OAA04238 for rsgb_lf_group-outgoing; Sun, 25 Apr 1999 14:24:22 GMT Received: from post.thorcom.com (root@post.unica.co.uk [194.75.183.70]) by troy.blacksheep.org (8.6.12/8.6.12) with ESMTP id OAA04234 for ; Sun, 25 Apr 1999 14:24:19 GMT Received: from mashie.force9.net ([195.166.128.30]) by post.thorcom.com with smtp (Exim 2.04 #3) id 10bPp5-0003Mj-00 for rsgb_lf_group@blacksheep.org; Sun, 25 Apr 1999 15:23:55 +0100 Received: (qmail 15597 invoked from network); 25 Apr 1999 14:24:34 -0000 Received: from mayfly.plus.net.uk (HELO mayfly.force9.net) (195.166.128.28) by mashie.force9.net with SMTP; 25 Apr 1999 14:24:34 -0000 Received: (qmail 31002 invoked from network); 25 Apr 1999 14:24:02 -0000 Received: from 193.hiper01.shef.dialup.force9.net (HELO prstesv1) (195.166.142.193) by mayfly.plus.net.uk with SMTP; 25 Apr 1999 14:24:02 -0000 Message-ID: <000201be8f27$8bd8f2a0$0600a8c0@prstesv1.prestel.co.uk> From: "Dave" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: Re: G3XTZ's options Date: Sun, 25 Apr 1999 15:18:03 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.1 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org Graham and co. What about something like Werner ON6ND was using (see picture in LF gallery www.wireless.org.uk/gallery/gallerlf.htm ). He has created a large diameter section at the top of his tower by fabricating a cylinder out of wire mesh. Unfortunately it does require the supporting structure to be insulated...... A pure vertical does seem to work very well as Steve GW4ALG proves when he has his balloon extension taking his to 20m high. Mike G3XDV suggested a top loading coil before the loading wires would throw the current out of phase with that in the main vertical and so reduce the cancellation..... Or you could just move! Incidentally, if my theory about the London attenuation is true then our signals should be more comparable to the West? 73, Dave G3YXM