Return-Path: Received: (qmail 10449 invoked from network); 15 Nov 2002 18:51:05 -0000 Received: from marstons.services.quay.plus.net (212.159.14.223) by mailstore with SMTP; 15 Nov 2002 18:51:05 -0000 Received: (qmail 14045 invoked by uid 10001); 15 Nov 2002 18:52:06 -0000 Received: from post.thorcom.com (193.82.116.70) by marstons.services.quay.plus.net with SMTP; 15 Nov 2002 18:52:06 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.10) id 18ClYG-0007KI-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Nov 2002 18:50:48 +0000 Received: from [62.253.164.43] (helo=mta3-svc.business.ntl.com) by post.thorcom.com with esmtp (Exim 4.10) id 18ClYF-0007K9-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Nov 2002 18:50:47 +0000 Received: from l8p8y6 ([62.252.232.105]) by mta3-svc.business.ntl.com (InterMail vM.4.01.03.27 201-229-121-127-20010626) with SMTP id <20021115185046.XGPJ15439.mta3-svc.business.ntl.com@l8p8y6> for ; Fri, 15 Nov 2002 18:50:46 +0000 Message-ID: <000c01c28cd7$d8dcc700$69e8fc3e@l8p8y6> From: "hamilton mal" To: rsgb_lf_group@blacksheep.org Date: Fri, 15 Nov 2002 18:49:48 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4807.1700 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: vertical/loop Content-Type: text/html; charset=windows-1252 X-Spam-Status: No, hits=1.0 required=5.0tests=SPAM_PHRASE_00_01,SUPERLONG_LINE,USER_AGENT_OEversion=2.42 X-Spam-Level: * Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Content-transfer-encoding: 8bit
Hi All
 
My argument is that a vertical antenna has the advantage over a loop at the same height out in the open ie the middle of a field. Some others are discussing environmental issues like verticals and loops in amongst trees, buildings and other RF absorbing obstacles.
The facts are  being distorted because of local environmental issues instead of comparing the two antennas on LF where both systems are small physically compared to the frequency. 
Only those with sufficient unobstructed space are in a position to test one against the other for a true accessment.
In reality most radio amateurs have to cope with small gardens, bushes, trees, adjacent buildings and telegraph poles etc, so they make the best of their situation, but on LF this can be a problem with antenna installations and one has to use a CONVENIENCE antenna rather than the ideal and it might well be that a loop in some cases wrapped around trees works better for some than a vertical lying up against the same trees but these circumstances are not valid arguments for a true accessment of comparing verticals against vertically orientated loops.
Although I do have some high trees on my property I have several acres tree free for antenna testing.
and have found the vertical a lot better and easier to tame, easy to match using a series inductor and tuned against an insulated ground radial system to match 50 ohms, and manageable RF current to get up to 1W erp radiated power. To try doing the same with a vertical loop at the same height would require 50 + amps RF and I would not even consider this approach at this power level.
73 de Mal/G3KEV