Return-Path: Received: (qmail 1328 invoked from network); 9 Jan 2003 16:19:49 -0000 Received: from murphys.services.quay.plus.net (212.159.14.225) by mailstore with SMTP; 9 Jan 2003 16:19:49 -0000 Received: (qmail 17156 invoked from network); 9 Jan 2003 16:19:41 -0000 Received: from post.thorcom.com (193.82.116.70) by murphys.services.quay.plus.net with SMTP; 9 Jan 2003 16:19:41 -0000 X-MSMail-Priority: High X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.12) id 18WfNr-0005rP-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 09 Jan 2003 16:18:19 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [212.1.130.1] (helo=smtp-1.visp.telinco.net) by post.thorcom.com with esmtp (Exim 4.12) id 18WfNr-0005rG-00 for rsgb_lf_group@blacksheep.org; Thu, 09 Jan 2003 16:18:19 +0000 Received: from [80.40.88.99] (helo=standalone) by smtp-1.visp.telinco.net with smtp (Exim 3.32 #1) id 18WfBE-0002IZ-00 for rsgb_lf_group@blacksheep.org; Thu, 09 Jan 2003 16:05:16 +0000 Received: by localhost with Microsoft MAPI; Thu, 9 Jan 2003 16:17:36 -0000 Message-ID: <01C2B7FA.9FABAB10.g4jnt@thersgb.net> From: "Andy talbot" To: rsgb_lf_group@blacksheep.org Date: Thu, 9 Jan 2003 16:17:35 -0000 Importance: high X-Priority: 1 X-Mailer: Microsoft Internet E-mail/MAPI - 8.0.0.4211 MIME-Version: 1.0 Subject: LF: RE: Re. LF noise Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=1.2 required=6.0tests=SPAM_PHRASE_00_01,X_PRIORITY_HIGHversion=2.43 X-Spam-Level: * X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false A small horizontal loop cannot generate vertical polarisation though, so presumably it just radiates vertically upwards, in which case what does the polarisation come down as after reflection ? Will it be arbitrary ? Andy G4JNT -----Original Message----- From: Laurie Mayhead [SMTP:laurie@g3aqc.freeserve.co.uk] Sent: 2003/01/09 13:23 To: rsgb_lf_group@blacksheep.org Subject: LF: Re. LF noise Hi Walter, Perhaps the reason why "noise"is vertically polarised is that noise sources are close to ground,even at HF. Hence ground losses inhibit the establishment of horizontal polarisation.This is more so the lower the frequency, at LF it is impossible to generate Horiz. polarisation using reasonable heights.I know of no LF antenna that can produce horiz. polarisation.Perhaps the story is different at VHF/UHF. 73 Laurie G3AQC