Return-Path: Received: (qmail 12167 invoked from network); 30 Mar 2000 22:18:43 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by grants.core.plus.net.uk with SMTP; 30 Mar 2000 22:18:43 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 12anAA-0007AF-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 30 Mar 2000 23:11:38 +0100 Received: from public2.thorcom.com ([212.172.148.20] ident=root) by post.thorcom.com with esmtp (Exim 3.02 #1) id 12an9z-00079g-00 for rsgb_lf_group@blacksheep.org; Thu, 30 Mar 2000 23:11:27 +0100 Received: from mailhost.netscapeonline.co.uk ([194.200.20.13]) by public2.thorcom.com with esmtp (Exim 3.02 #1) id 12ajMs-00063G-00 for rsgb_lf_group@blacksheep.org; Thu, 30 Mar 2000 19:08:31 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from [195.44.222.105] (helo=netscapeonline.co.uk) by mailhost.netscapeonline.co.uk with esmtp (Exim 3.02 #1) id 12ajMn-0004e0-00 for rsgb_lf_group@blacksheep.org; Thu, 30 Mar 2000 18:08:25 +0000 Message-ID: <38E389AE.B5D45E6F@netscapeonline.co.uk> Date: Thu, 30 Mar 2000 17:06:54 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "g3kev" Organization: Netscape Online member X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win95; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: "rsgb" Subject: LF: CONFUSION Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: There seems to be some confusion about large and small vertical antennas on LF. Although the radiation patern(profile) is the same the INTENSITITY of the propogated signal is much greater from the large vertical given the same power. I have tested this and found it to be the case. There seems to be some contradictory opinions but they are only theoritical and I await someone else to perform a practical field test. ie install a 120 ft vertical with a suitable antenna resonated for 136 khz , then dismantle it or lower it to the average 30 feet, re-resonate and check out the difference. Use the same radial system. de G3KEV