Return-Path: Received: from rly-db08.mx.aol.com (rly-db08.mail.aol.com [172.19.130.83]) by air-db03.mail.aol.com (v121.5) with ESMTP id MAILINDB031-adc487f35121dd; Thu, 17 Jul 2008 08:03:48 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-db08.mx.aol.com (v121.5) with ESMTP id MAILRELAYINDB082-adc487f35121dd; Thu, 17 Jul 2008 08:03:31 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1KJSCA-0000lc-Kb for rs_out_1@blacksheep.org; Thu, 17 Jul 2008 13:02:50 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1KJSCA-0000lT-7s for rsgb_lf_group@blacksheep.org; Thu, 17 Jul 2008 13:02:50 +0100 Received: from smtp-out-3.talktalk.net ([62.24.128.233] helo=smtp.talktalk.net) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1KJSC6-0006Uy-1v for rsgb_lf_group@blacksheep.org; Thu, 17 Jul 2008 13:02:50 +0100 X-Path: TTSMTP X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Aj4uANXRfkhOlKwvPGdsb2JhbACEW4NyiXABAQEBLZ0n Received: from unknown (HELO mal769a60aa920) ([78.148.172.47]) by smtp.talktalk.net with SMTP; 17 Jul 2008 13:02:37 +0100 Message-ID: <003601c8e805$02667a10$0301a8c0@mal769a60aa920> From: "mal hamilton" To: References: <003c01c8e7e6$5eca7500$0b01a8c0@acer5gi5q0ubzj> Date: Thu, 17 Jul 2008 13:02:38 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Karma: 0: X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: satellites Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit 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-IP: 193.82.116.20 X-AOL-SCOLL-AUTHENTICATION: listenair ; SPF_helo : n X-AOL-SCOLL-AUTHENTICATION: listenair ; SPF_822_from : n Hi John With only half a dozen operators active on 500 khz and then only at weekends, its unlikely to attract many authers. There is enough information already available for potential newcomers and veterans rebuilding One point that comes up frequently is permitted power.on 500 khz in the UK. I would suggest an increase in power to at least 20w erp, to encourage some long range propagation experiments and some technical input for the larger amplifiers required. 160 metres at the other end of the MF spectrum is similar to 600 metres regarding propagation and you would not get far with reliability with 1w erp on that band. 73 de Mal/G3KEV ----- Original Message ----- From: "John W Gould" To: Sent: Thursday, July 17, 2008 9:23 AM Subject: RE: LF: satellites To me the important point that I tried to make in my posting, which has drawn no comment, is the one I made about getting people to write up their experimental work for publication, and specifically that concerning 500kHz. To maintain progress on gaining a long-term allocation around 500kHz we will need to raise the profile nationally and internationally of work undertaken on 500kHz. One way of doing this is to get a few good technical articles written, not just sharing knowledge but encouraging others and providing suitable designs to enable them to join in; good construction articles can do just that. 73 John, G3WKL