Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dg06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 729A3380000D8; Tue, 21 Jun 2011 09:00:42 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QZ0Xy-000487-VC for rs_out_1@blacksheep.org; Tue, 21 Jun 2011 13:59:14 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QZ0Xy-00047y-9M for rsgb_lf_group@blacksheep.org; Tue, 21 Jun 2011 13:59:14 +0100 Received: from outbound-queue-1.mail.thdo.gradwell.net ([212.11.70.34]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1QZ0Xx-0003ta-T8 for rsgb_lf_group@blacksheep.org; Tue, 21 Jun 2011 13:59:14 +0100 Received: from outbound-edge-2.mail.thdo.gradwell.net (bonnie.gradwell.net [212.11.70.2]) by outbound-queue-1.mail.thdo.gradwell.net (Postfix) with ESMTP id 846CB221EE for ; Tue, 21 Jun 2011 13:59:11 +0100 (BST) Received: from ctuash.plus.com (HELO Hugh) (212.159.90.113) (smtp-auth username ashford, mechanism login) by outbound-edge-2.mail.thdo.gradwell.net (qpsmtpd/0.83) with ESMTPA; Tue, 21 Jun 2011 13:59:11 +0100 Message-ID: <7C83B6E4275F422A83872B7E0134B689@Hugh> From: "Hugh_m0wye" To: References: <000c01cb5a7a$44cfcc50$0401a8c0@xphd97xgq27nyf><4C1A271605FB0B62@smtp208.alice.it><4C9A8CC5.30305@gmx.com><4C9B3FCE.5080700@gmx.com> Date: Tue, 21 Jun 2011 13:59:01 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5994 X-Gradwell-MongoId: 4e00959f.ce6-77c1-2 X-Gradwell-Auth-Method: smtpauth X-Gradwell-Auth-Credentials: ashford X-Spam-Score: 3.4 (+++) X-Spam-Report: autolearn=disabled,FORGED_MUA_OUTLOOK=3.36 Subject: LF: PA0RDT polarisation Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.6 required=5.0 tests=FORGED_MUA_OUTLOOK autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:423797120:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d410e4e0095fa07f5 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hello Group, My apologies if this topic has already been covered, but I have trawled back through many LF E-mails and can't find any discussion of it. I have been persuaded to build a PA0RDT miniwhip by Chris G4AYT, and I am most impressed by its performance so far. It is not yet in an ideal location, but the weather has not been brilliant for out-door activities ... My question is what is its polarisation ? And leading on from that what is it acting "against"? I have reaad that it is an E-field probe, but I assume that an E-field probe is just a very short dipole. So if the patch of pcb is one arm of the dipole, is the rest of the circuit board and the feed cable the other half of the dipole, and so does this then form part of the antenna ? In which case the instruction to place the antenna outside the building is rather a strange one, as the coax feeder would also be receiving signals right back to the radio in the shack. I tried moving the coax around while the antenna was fixed, and it didn't seem to have much effect on reception. I would guess that when the antenna is mouted as described that it is most sensitive to vertically polarised signals - but I don't think I have seen that written down anywhere. Your thoughts on this would be much appreciated - (or perhaps someone could point me to where the discussion has already been archived :-) 73 Hugh M0WYE