Return-Path: Received: (qmail 16511 invoked from network); 14 Nov 2002 12:23:35 -0000 Received: from mx.last.plus.net (212.159.3.230) by mailstore with SMTP; 14 Nov 2002 12:23:35 -0000 Received: (qmail 28336 invoked from network); 14 Nov 2002 11:27:38 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from post.thorcom.com (193.82.116.70) by mx.last.plus.net with SMTP; 14 Nov 2002 11:27:38 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.10) id 18CIEw-0000sQ-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 14 Nov 2002 11:32:54 +0000 Received: from [204.60.203.69] (helo=mta3.snet.net) by post.thorcom.com with esmtp (Exim 4.10) id 18CIEv-0000sH-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Nov 2002 11:32:53 +0000 Received: from snet.net (trtn-sh7-port233.snet.net [204.60.214.233]) by mta3.snet.net (8.12.3/8.12.3/SNET-smtp-1.2/D-1.1.1.1/O-1.1.1.1) with ESMTP id gAEBS6oG022652 for ; Thu, 14 Nov 2002 06:28:07 -0500 (EST) Message-ID: <3DD389EE.E34C64A9@snet.net> Date: Thu, 14 Nov 2002 06:33:02 -0500 From: "Jay Rusgrove" X-Mailer: Mozilla 4.77 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <3DD35969.30941.58250D@localhost> <004801c28bb7$b2c00580$015e89d9@jackie> Subject: Re: LF: Loop vs Marconi Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=-1.6 required=5.0tests=EMAIL_ATTRIBUTION,REFERENCES,SPAM_PHRASE_00_01, USER_AGENT_MOZILLA_XM,X_ACCEPT_LANGversion=2.42 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Steve The loop is actually fairly omnidirectional - just not at 0 degrees elevation. As you move up from 0 degrees elevation the pattern starts to "fill in" nicely in the direction of the "nulls". Not sure, but I think you can prove this with a small receive loop while nulling out a local broadcast station. Tilt the loop even slightly off vertical and away goes your null in a hurry. While I realize that low angle radiation is no doubt desirable, does anyone know the optimum radiation angle to best "couple" into skywave propagation for a given transmitter to receiver distance? I may have missed this info in the literature. Jay Rusgrove, W1VD Steve Thompson wrote: > Anyone found a way to make a loop omnidirectional? > > Steve