Return-Path: Received: (qmail 7553 invoked from network); 6 Apr 2001 20:11:30 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 6 Apr 2001 20:11:30 -0000 Received: (qmail 23485 invoked from network); 6 Apr 2001 20:11:19 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 6 Apr 2001 20:11:19 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 14lcV5-0002D1-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 06 Apr 2001 21:06:31 +0100 Received: from latimer.mail.uk.easynet.net ([195.40.1.40]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 14lcV4-0002Cw-00 for rsgb_lf_group@blacksheep.org; Fri, 06 Apr 2001 21:06:30 +0100 Received: from ericadodd (tnt-13-9.easynet.co.uk [212.134.22.9]) by latimer.mail.uk.easynet.net (Postfix) with SMTP id 470D553752 for ; Fri, 6 Apr 2001 21:06:05 +0100 (BST) Message-ID: <000901c0bed5$2b67ac60$091686d4@ericadodd> From: "g3ldo" To: rsgb_lf_group@blacksheep.org Subject: LF: Helical antennas Date: Fri, 6 Apr 2001 21:06:16 +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: Does anyone have a description of how the helical antenna (not the axial mode antenna), like the one built by Toni HB9ASB, works? Tony made a lot of tests and concluded that most of the radiation came from the helical coil rather than the top loading, see page 58 of the LF handbook. Regards, Peter, G3LDO e-mail Web