Return-Path: Received: from mtain-dj04.r1000.mx.aol.com (mtain-dj04.r1000.mail.aol.com [172.19.187.140]) by air-df07.mail.aol.com (v127_r1.1) with ESMTP id MAILINDF071-5efa4b82c9e3174; Mon, 22 Feb 2010 13:16:03 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-dj04.r1000.mx.aol.com (Internet Inbound) with ESMTP id 14A2038000138; Mon, 22 Feb 2010 13:16:00 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NjcoA-0003cr-Fd for rs_out_1@blacksheep.org; Mon, 22 Feb 2010 18:15:02 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NjcoA-0003ci-1H for rsgb_lf_group@blacksheep.org; Mon, 22 Feb 2010 18:15:02 +0000 Received: from smtp.qtxt.dns-iol.com ([195.200.78.13]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Njco7-00042s-61 for rsgb_lf_group@blacksheep.org; Mon, 22 Feb 2010 18:15:02 +0000 Received: (qmail 30576 invoked by uid 507); 22 Feb 2010 18:51:34 +0100 Received: from unknown (HELO JR) (john.rabson@numeo.fr@217.67.155.178) by smtp.qtxt.dns-iol.com with SMTP; 22 Feb 2010 18:51:34 +0100 Message-ID: <201002221851390968.021247E4@smtp2.numeo.fr> In-Reply-To: <20100222112301.D8324F3862@smtps02.kuleuven.be> References: <32098189.1842344.1266827344324.JavaMail.fmail@mwmweb080> <20100222112301.D8324F3862@smtps02.kuleuven.be> X-Mailer: Courier 3.50.00.09.1098 (http://www.rosecitysoftware.com) (P) Date: Mon, 22 Feb 2010 18:51:39 +0100 From: "John RABSON" To: rsgb_lf_group@blacksheep.org Mime-Version: 1.0 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: AW: LF: AW: Beaconing on 8.79 kHz in QRSS Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: quoted-printable X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G x-aol-sid: 3039cdbc9d084b82c9e0178e X-AOL-IP: 193.82.116.20 If I recall correctly, G0AKN (now SK) tried audio frequencies as well as= 73 and 136 kHz. G8DSU, who monitors this list, may have more information= . An article by G0AKN on this subject appeared in the Jan-Feb.1999 issue= of the AMRAD newsletter. More information may be found by searching onli= ne for G0AKN. =20 Most cave radio work takes place on 87kHz USB although we have sometimes= used frequencies as low as 27kHz. The maximum range we have achieved wit= h a 4 W transmitter is about 2 1/2 kilometres. 73 John Rabson=20 F5VLF 58800 Cervon France JN17vg