Return-Path: Received: (qmail 14034 invoked from network); 10 Jul 2002 07:35:19 -0000 Received: from murphys.services.quay.plus.net (212.159.14.225) by mailstore with SMTP; 10 Jul 2002 07:35:19 -0000 Received: (qmail 28834 invoked from network); 10 Jul 2002 07:34:24 -0000 Received: from post.thorcom.com (193.82.116.70) by murphys.services.quay.plus.net with SMTP; 10 Jul 2002 07:34:24 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 17S2u8-0000rM-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 09 Jul 2002 22:52:16 +0100 Received: from carbon.btinternet.com ([194.73.73.92] helo=carbon) by post.thorcom.com with esmtp (Exim 3.33 #2) id 17S2u8-0000rG-00 for rsgb_lf_group@blacksheep.org; Tue, 09 Jul 2002 22:52:16 +0100 Received: from host213-1-65-176.in-addr.btopenworld.com ([213.1.65.176] helo=main) by carbon with smtp (Exim 3.22 #8) id 17S2u6-0000Lz-00 for rsgb_lf_group@blacksheep.org; Tue, 09 Jul 2002 22:52:15 +0100 Message-ID: <000201c22792$e70d1d20$b04101d5@main> From: "Alan Melia" To: "LF-Group" Subject: LF: re LITX wire v enamelled Date: Tue, 9 Jul 2002 20:51:03 +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 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Marcus, I have not much experience with ferrite rods, but the article in Electronics World for August 2002 (mentioned in an earlier posting) does evaluate various rod configurations for efficiency. I think the conclusion is that you cannot achieve the effective height that you can easily achieve with an open loop. They measure a 0.77m diam 38 turn loop with an effective height of 9metres !! The best performance ferrrite rod aerial was an effective height of 1.8m using 12 rods 200mm x 10mm. They dismiss it as usefull only as a portable test aerial. I hope that helps a little. Cheers de Alan G3NYK alan.melia@btinternet.com