Return-Path: Received: (qmail 24343 invoked from network); 15 Mar 2000 19:23:28 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by grants.core.plus.net.uk with SMTP; 15 Mar 2000 19:23:28 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 12VJIM-0005FJ-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 15 Mar 2000 19:17:26 +0000 Received: from mb09.swip.net ([193.12.122.212]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 12VJIL-0005FE-00 for rsgb_lf_group@blacksheep.org; Wed, 15 Mar 2000 19:17:25 +0000 Received: from win95 (d212-151-90-173.swipnet.se [212.151.90.173]) by mb09.swip.net (8.8.8/8.8.8) with SMTP id UAA21890 for ; Wed, 15 Mar 2000 20:17:04 +0100 (MET) Message-ID: <001501bf8eb3$77e2b6a0$ad5a97d4@win95.swipnet.se> From: "C Andersson" To: "RSGB LF group" Subject: LF: More LF documents on the web Date: Wed, 15 Mar 2000 20:19:46 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: While browsing around the net I found the following documents which might be of interest. "Technique for building and calibrating VLF/LF receive loop antennas" http://www.nosc.mil/sti/publications/biblio/VERYLOWFREQUENCIES.HTML Unfortunately the photos are a bit dark. And furthermore: "Dipole and monopole antenna gain and effective area for communication formulas" which says: "A comparison involving antenna measurements and performance predictions has sometimes revealed a 6-dB discrepancy between the ground-wave transmission measurements and the correspondning calculations" That 6 dB sounds familiar to me. http://www.nosc.mil/sti/publications/biblio/ANTENNAS.HTML /sm6pxj