Return-Path: Received: (qmail 365 invoked from network); 10 May 2001 22:32:51 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 10 May 2001 22:32:51 -0000 Received: (qmail 17926 invoked from network); 10 May 2001 09:14:37 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 10 May 2001 09:14:37 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 14xmLA-0005Fn-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 10 May 2001 10:02:32 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from [213.2.16.106] (helo=rsgb.org.uk) by post.thorcom.com with esmtp (Exim 3.16 #2) id 14xmL9-0005Fh-00 for rsgb_lf_group@blacksheep.org; Thu, 10 May 2001 10:02:31 +0100 Received: from miked by rsgb.org.uk with SMTP (MDaemon.v2.8.7.5.R) for ; Thu, 10 May 2001 09:56:12 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Thu, 10 May 2001 09:56:10 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: [Lf] Antenna Message-ID: <3AFA65BA.19599.1F934D@localhost> In-reply-to: <97.150dae0b.282ac6b0@aol.com> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org X-Return-Path: miked@mail Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > >From N8BKR > > The top hat consists of eight 20 foot 1.25 > inch diameter aluminum tubing mounted on two plywood disks. I have tested this > antenna an it works very well. This antenna cost me about $1000.00 to build That's very expensive plywood! Seriously, this type of antenna would be very efficient for its physical size as the coil is high up and the capacity hat is very low loss. However, being small, the ground losses will be high, so it is unlikely to outperform anything that has a higher radiation resistance, such as a T or L with 40m or more of top wires. Mike, G3XDV (IO91VT) http://www.lf.thersgb.net