Return-Path: Received: (qmail 3432 invoked from network); 16 Jul 1999 13:30:47 +0100 Received: from magnet.plus.net.uk (HELO magnet.force9.net) (195.166.128.26) by guiness.force9.net with SMTP; 16 Jul 1999 13:30:47 +0100 Received: (qmail 30647 invoked from network); 16 Jul 1999 12:33:02 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by magnet.plus.net.uk with SMTP; 16 Jul 1999 12:33:02 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 1156qx-0006Ut-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 16 Jul 1999 13:12:35 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from mailserv.cc.kuleuven.ac.be ([134.58.8.44]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 1156qw-0006US-00 for rsgb_lf_group@blacksheep.org; Fri, 16 Jul 1999 13:12:34 +0100 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mailserv.cc.kuleuven.ac.be (8.9.0/8.9.0) with SMTP id OAA20723 for ; Fri, 16 Jul 1999 14:18:16 +0200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3.0.1.16.19990716141408.084fc202@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Fri, 16 Jul 1999 14:14:08 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: ERP In-reply-to: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org Sender: At 09:19 16/07/99 +0100, G3XDV wrote: >Dick, PA0SE, and others have recently been using a multiplication >factor of 1.83dB to obtain ERP. This is the supposed gain of a >vertical antenna over a dipole because of ground reflection. One more thing to mention : when you MEASURE your by the way Dick suggests you don't have to take in account any multiplication factor if you have a short vertical antenna. When you measure at 2 .. 3 km and on the ground you are in the plane of maximum radiation of the antenna. What you measure will be your power in EIRP. Only for antennas that have maximum radiation at a certain elevation angle a correction factor will be needed. 73, Rik Rik Strobbe ON7YD rik.strobbe@fys.kuleuven.ac.be Villadreef 14 B-3128 Baal BELGIUM (JO20IX)