Return-Path: Received: (qmail 10445 invoked from network); 25 Jun 1999 12:41:46 +0100 Received: from magnus.plus.net.uk (HELO magnus.force9.net) (195.166.128.27) by guiness.force9.net with SMTP; 25 Jun 1999 12:41:46 +0100 Received: (qmail 15904 invoked from network); 25 Jun 1999 11:41:47 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by magnus.plus.net.uk with SMTP; 25 Jun 1999 11:41:46 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 10xUDz-0003rN-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 25 Jun 1999 12:32:51 +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 10xUDy-0003rI-00 for rsgb_lf_group@blacksheep.org; Fri, 25 Jun 1999 12:32:50 +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 NAA11562 for ; Fri, 25 Jun 1999 13:38:17 +0200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3.0.1.16.19990625134806.2c470572@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, 25 Jun 1999 13:48:06 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: Cloth hanger antenna In-reply-to: <37734EEB.4C15830B@phonakcom.ch> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org Sender: At 11:42 25/06/99 +0200, HB9ASB wrote: >2. I have the means to measure the fieldstrenght (V/m) close to my >antenna (up to 100m away). Is there a reliable method to calculate the >ERP from the fieldstrenght? I am interested to find a reliable method to measure fieldstrength, I have read about some methods using small 1-turn loops but they all need good calibration. Regarding the distance : I read somewhere that on 150kHz a 'far-field' measurement can be done at 1km (= 0.5 wavelengths), I am afraid that 100m is too less. 73, Rik Rik Strobbe ON7YD rik.strobbe@fys.kuleuven.ac.be Villadreef 14 B-3128 Baal BELGIUM (JO20IX)