Return-Path: Received: (qmail 15197 invoked from network); 14 Apr 2001 16:15:49 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 14 Apr 2001 16:15:49 -0000 Received: (qmail 18810 invoked from network); 14 Apr 2001 16:15:33 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 14 Apr 2001 16:15:33 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 14oSby-0003b1-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 14 Apr 2001 17:09:22 +0100 Received: from latimer.mail.uk.easynet.net ([195.40.1.40]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 14oSbx-0003aw-00 for rsgb_lf_group@blacksheep.org; Sat, 14 Apr 2001 17:09:21 +0100 Received: from ericadodd (tnt-1-159.easynet.co.uk [195.40.206.159]) by latimer.mail.uk.easynet.net (Postfix) with SMTP id 92FCF53783 for ; Sat, 14 Apr 2001 17:08:51 +0100 (BST) Message-ID: <001601c0c4fd$6a22a800$9fce28c3@ericadodd> From: "g3ldo" To: rsgb_lf_group@blacksheep.org References: <65AECDF1F89AD411900400508BFC869F9C043F@pdw-mail-1.dera.gov.uk> Subject: LF: Re: RE: Helical antennas Date: Sat, 14 Apr 2001 17:09:22 +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 5.50.4522.1200 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 Andy, > The normal mode helix was covered in some detail in a 1974 (!!) edition > of Radio Communication with a set of empirically determined equations > for calculating resonance and winding dimensions. Seem to remember it > was by the famous D A Tong, but I may be mixing it up with another > article. I found the equations to be a good starting point from which > to fine tune helials for HF. Used to have a copy of that RadCom, and > it may still be lying on a shelf somewhere. > I haven't been able to find this article - if you can find any more info I would be grateful. Regards, Peter, G3LDO e-mail Web