Return-Path: Received: (qmail 17256 invoked from network); 23 Jun 1999 22:47:25 +0100 Received: from magnus.plus.net.uk (HELO magnus.force9.net) (195.166.128.27) by guiness.force9.net with SMTP; 23 Jun 1999 22:47:25 +0100 Received: (qmail 23775 invoked from network); 23 Jun 1999 21:47:15 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by magnus.plus.net.uk with SMTP; 23 Jun 1999 21:47:15 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 10wuV6-000638-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 23 Jun 1999 22:24:08 +0100 X-MSMail-Priority: Normal Received: from arl-img-9.compuserve.com ([149.174.217.139]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 10wuV5-000633-00 for rsgb_lf_group@blacksheep.org; Wed, 23 Jun 1999 22:24:07 +0100 Received: (from root@localhost) by arl-img-9.compuserve.com (8.8.6/8.8.6/2.19) id RAA21547 for rsgb_lf_group@blacksheep.org; Wed, 23 Jun 1999 17:24:02 -0400 (EDT) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Date: Wed, 23 Jun 1999 17:23:54 -0400 From: "Prof R. Jennison" Subject: LF: Re: Antennas To: rsgb_lf_group@blacksheep.org Message-ID: <199906231724_MC2-7A7C-8D3E@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org Sender: The spacing between the wires on the horizontal top section is simply dictated by the fractional wavelength and the degree of efficiency required versus the mechanical and economical constraints of having a very close spacing and more wires to give the same total width. Think of it in terms of a part of a Faraday cage. If the spacing is small relative to the elevation then it's fine. Shorting the far ends should not make much difference. 73, Roger, G2AJV.