Return-Path: <owner-rsgb_lf_group@blacksheep.org> Received: (qmail 24623 invoked from network); 24 Oct 2002 21:48:22 -0000 Received: from murphys.services.quay.plus.net (212.159.14.225) by mailstore with SMTP; 24 Oct 2002 21:48:22 -0000 Received: (qmail 670 invoked from network); 24 Oct 2002 21:47:34 -0000 Received: from post.thorcom.com (193.82.116.70) by murphys.services.quay.plus.net with SMTP; 24 Oct 2002 21:47:34 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.10) id 184poh-0007RY-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 24 Oct 2002 22:46:59 +0100 Received: from [210.86.15.144] (helo=mta201-rme.xtra.co.nz) by post.thorcom.com with esmtp (Exim 4.10) id 184pog-0007RP-00 for rsgb_lf_group@blacksheep.org; Thu, 24 Oct 2002 22:46:58 +0100 Received: from mta4-rme.xtra.co.nz ([210.86.15.141]) by mta201-rme.xtra.co.nz with ESMTP id <20021024214624.KXGZ7085.mta201-rme.xtra.co.nz@mta4-rme.xtra.co.nz> for <rsgb_lf_group@blacksheep.org>; Fri, 25 Oct 2002 10:46:24 +1300 Received: from bob2l2u6k2n1g3 ([210.54.98.43]) by mta4-rme.xtra.co.nz with SMTP id <20021024214623.JZKU13285.mta4-rme.xtra.co.nz@bob2l2u6k2n1g3> for <rsgb_lf_group@blacksheep.org>; Fri, 25 Oct 2002 10:46:23 +1300 Message-ID: <001701c27ba6$e22eca20$f16136d2@bob2l2u6k2n1g3> From: "Vernall" <vernall@xtra.co.nz> To: rsgb_lf_group@blacksheep.org References: <51.264fe513.2ae9ba52@aol.com> Date: Fri, 25 Oct 2002 10:46:23 +1300 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: Re: LF: alternative antenna for 136kHz Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=0.5 required=5.0tests=REFERENCES,SPAM_PHRASE_00_01,USER_AGENT_OEversion=2.42 Sender: <owner-rsgb_lf_group@blacksheep.org> Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Rik, You have a novel idea. There could be problems of transients with the "synchronous switch" needed to make and break during each RF cycle. Most antennas work in "steady state mode" where the energy has time to reflect and establish a "standing wave pattern", and related wavefronts in space around the antenna. Your idea involves a rather interruptive action and would seem to reduce the scope for stored energy in near fields. 73, Bob 73, Bob