X-GM-THRID: 1241081438804110844 X-Gmail-Labels: rsgb lf Delivered-To: daveyxm@gmail.com Received: by 10.78.172.10 with SMTP id u10cs503172hue; Thu, 5 Jul 2007 11:09:56 -0700 (PDT) Received: by 10.78.178.5 with SMTP id a5mr4860844huf.1183658996806; Thu, 05 Jul 2007 11:09:56 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.google.com with ESMTP id d2si10419875nfc.2007.07.05.11.09.53; Thu, 05 Jul 2007 11:09:56 -0700 (PDT) Received-SPF: neutral (google.com: 193.82.116.20 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1I6Vin-0003lk-96 for rs_out_1@blacksheep.org; Thu, 05 Jul 2007 19:06:29 +0100 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1I6Vim-0003lb-Og for rsgb_lf_group@blacksheep.org; Thu, 05 Jul 2007 19:06:28 +0100 Received: from smtp-vbr16.xs4all.nl ([194.109.24.36]) by relay2.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1I6Vij-0003cJ-Fm for rsgb_lf_group@blacksheep.org; Thu, 05 Jul 2007 19:06:28 +0100 Received: from PCRoelof (ndb.demon.nl [82.161.81.65]) by smtp-vbr16.xs4all.nl (8.13.8/8.13.8) with SMTP id l65I6JvH075152 for ; Thu, 5 Jul 2007 20:06:24 +0200 (CEST) (envelope-from roelof@ndb.demon.nl) Message-ID: <000c01c7bf2f$2da47830$2101a8c0@PCRoelof> From: "Roelof Bakker" To: References: <468CBA6B.31094.AD8C67@dave.davesergeant.com> <001e01c7bf27$3ee3e160$3a248351@w4o8m9> Date: Thu, 5 Jul 2007 18:06:09 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 X-Virus-Scanned: by XS4ALL Virus Scanner X-Spam-Score: -0.3 (/) X-Spam-Report: autolearn=disabled,AWL=-0.288 Subject: Re: LF: 500 - beacons 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 Status: O X-Status: X-Keywords: X-UID: 7172 Dear James, LF group, You wrote: >> We don't know much about propagation on 500kHz yet << For a start you might have a look at the following website: http://www.classaxe.com/dx/ndb/reu/index.php Select in the "Types" field "NAVTEX" and you will have an overview of recent worldwide NAVTEX reception on 490 and 518 kHz. It might also be interesting to select the type NDB and select e.g the 490 - 520 kHz frequency range. 500 kHz has great potential; a former spark told me that they used to work PCH at MF from the Straight of Malaysia when HF was not usuable. They used one KW on a large Shell tanker. Best regards, Roelof Bakker, pa0rdt