Return-Path: Received: (qmail 18735 invoked from network); 22 Mar 2000 19:52:16 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by redlabel.core.plus.net.uk with SMTP; 22 Mar 2000 19:52:16 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 12Xr4h-0007UN-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 22 Mar 2000 19:45:51 +0000 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.02 #1) id 12Xr4g-0007UI-00 for rsgb_lf_group@blacksheep.org; Wed, 22 Mar 2000 19:45:50 +0000 Received: from oemcomputer (man-139.dialup.zetnet.co.uk [194.247.40.177]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id TAA07175 for ; Wed, 22 Mar 2000 19:45:35 GMT Message-ID: <000001bf9437$6705aac0$b128f7c2@oemcomputer> From: "John Rabson" To: rsgb_lf_group@blacksheep.org References: <3.0.1.16.20000322114130.2e87f8a4@mail.cc.kuleuven.ac.be> Subject: Re: LF: RE: MSF (6O kHz) and DCF77 (77.5 kHz) Date: Wed, 22 Mar 2000 19:34:23 -0000 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 5.00.2615.200 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: Thank you all for supplying the information I requested. May I explain what is going on? Last weekend the British Cave Research Association's Cave Radio and Electronics Group performed some tests in the Yorkshire Dales with a view to finding, amongst other things, whether we could null out some of the interference we experience with cave radios. The principal source of interference is LORAN C (known in cave radio circles as The Galloping Horses) but this of course is a somewhat variable signal . We use MSF and DCF as more nearly constant signals for testing the directivity of our surface arrays . Our results should be published in the next issue of the correct a journal. 73 de John Rabson G3PAI