X-GM-THRID: 1203480389281731758 X-Gmail-Labels: rsgb lf X-Gmail-Received: ee06dc73d41ed11a05affaa4d1930de9fe89c8ec Delivered-To: daveyxm@gmail.com Received: by 10.54.72.5 with SMTP id u5cs9244wra; Mon, 15 May 2006 14:25:37 -0700 (PDT) Received: by 10.49.35.15 with SMTP id n15mr2513959nfj; Mon, 15 May 2006 14:25:37 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.gmail.com with ESMTP id p72si111599nfc.2006.05.15.14.25.36; Mon, 15 May 2006 14:25:37 -0700 (PDT) Received-SPF: neutral (gmail.com: 193.82.116.20 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1FfkVk-0006yZ-6A for rs_out_1@blacksheep.org; Mon, 15 May 2006 22:21:52 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1FfkVj-0006yQ-RM for rsgb_lf_group@blacksheep.org; Mon, 15 May 2006 22:21:51 +0100 Received: from grunt8.ihug.co.nz ([203.109.254.48]) by relay1.thorcom.net with esmtp (Exim 4.51) id 1FfmS3-0003c2-AO for rsgb_lf_group@blacksheep.org; Tue, 16 May 2006 00:26:26 +0100 Received: from 203-173-156-36.bliink.ihug.co.nz (athlon1200) [203.173.156.36] by grunt8.ihug.co.nz with esmtp (Exim 3.35 #1 (Debian)) id 1FfkUR-0005Rg-00; Tue, 16 May 2006 09:20:31 +1200 Received: from 127.0.0.1 (AVG SMTP 7.1.392 [268.5.6/339]); Tue, 16 May 2006 09:20:51 +1200 Message-ID: <080401c67865$719a85a0$7900a8c0@athlon1200> From: "Dave Brown" To: References: <003c01c67744$f08f9160$2201a8c0@PC2> <001a01c6777d$448fa600$2201a8c0@pcroelof> <043e01c67799$8ccbb5a0$7900a8c0@athlon1200> <002901c67843$ff9d5200$2201a8c0@pcroelof> Date: Tue, 16 May 2006 09:20:51 +1200 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 Mime-Version: 1.0 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: Re: miniwhip testing - was T/A May 14 Content-Transfer-Encoding: 7bit Content-Type: text/plain; format=flowed; charset=Windows-1252; reply-type=response X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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 Status: O X-Status: X-Keywords: X-UID: 5293 Hi Roelof The results of testing with the battery operated SPM-3 may give a clearer picture of what is happening. Your test data appears to show the metallic pole is reducing the effective height of the active antenna. But it may actually be more to do with the metal support disturbing the (assumed constant with height) field strength of the incident vertically polarised signal. The effect of grounding or otherwise the coax immediately beneath the active antenna mounted on a non-metallic pole is interesting. 73 Dave ZL3FJ -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.392 / Virus Database: 268.5.6/339 - Release Date: 14/05/2006