Return-Path: Received: from mtain-de11.r1000.mx.aol.com (mtain-de11.r1000.mx.aol.com [172.29.64.211]) by air-df07.mail.aol.com (v126.13) with ESMTP id MAILINDF072-5efb4b587eac8a; Thu, 21 Jan 2010 11:19:56 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-de11.r1000.mx.aol.com (Internet Inbound) with ESMTP id 411493800017D; Thu, 21 Jan 2010 11:19:55 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NXzju-0005wz-Fe for rs_out_1@blacksheep.org; Thu, 21 Jan 2010 16:18:34 +0000 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NXzju-0005wq-3Z for rsgb_lf_group@blacksheep.org; Thu, 21 Jan 2010 16:18:34 +0000 Received: from smtp.qtxt.dns-iol.com ([195.200.78.13]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NXzjs-00071T-Hh for rsgb_lf_group@blacksheep.org; Thu, 21 Jan 2010 16:18:34 +0000 Received: (qmail 11459 invoked by uid 507); 21 Jan 2010 17:18:04 +0100 Received: from unknown (HELO JR) (john.rabson@numeo.fr@217.67.155.178) by smtp.qtxt.dns-iol.com with SMTP; 21 Jan 2010 17:18:04 +0100 Message-ID: <201001211718110171.143BA774@smtp2.numeo.fr> In-Reply-To: <9afca2641001210525p2b5eab47lfa84307e071ac5e6@mail.gmail.com> References: <000b01ca9a1d$f538a620$0202a8c0@laptopcore2> <20100121104239.E3CDE31E702@smtps01.kuleuven.be> <9afca2641001210525p2b5eab47lfa84307e071ac5e6@mail.gmail.com> X-Mailer: Courier 3.50.00.09.1098 (http://www.rosecitysoftware.com) (P) Date: Thu, 21 Jan 2010 17:18:11 +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: LF: about guns, water pistols and dripping tabs 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: 3039ac1d40d34b587eab7b78 X-AOL-IP: 193.82.116.20 On 21/01/2010 at 13:25 Roger Lapthorn wrote: >BTW, Dom Baines M1KTA quoted something interesting to me today: "Terman's >Radio Engineering Handbook (1948) >stated the maximum working distance for 1 kW 500kHz over salt water was >1,500 miles!". So, I need to up my power then! Nearly 50 years ago, a former RO told me of the day he called an Alaskan= coast station on 500 to say he was entering harbour. He was answered by= Wellington Harbour Radio. John Rabson=20 F5VLF 58800 Cervon France JN17vg