Return-Path: Received: from rly-da07.mx.aol.com (rly-da07.mail.aol.com [172.19.129.81]) by air-da04.mail.aol.com (v121_r4.4) with ESMTP id MAILINDA043-a7a4957b5c6f4; Sun, 28 Dec 2008 12:22:17 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-da07.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINDA072-a7a4957b5c6f4; Sun, 28 Dec 2008 12:22:15 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LGzKj-0002p6-RQ for rs_out_1@blacksheep.org; Sun, 28 Dec 2008 17:21:45 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LGzKj-0002ox-Fc for rsgb_lf_group@blacksheep.org; Sun, 28 Dec 2008 17:21:45 +0000 Received: from smtp817.mail.ird.yahoo.com ([77.238.189.17]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1LGzKh-0002Du-3h for rsgb_lf_group@blacksheep.org; Sun, 28 Dec 2008 17:21:45 +0000 Received: (qmail 56156 invoked from network); 28 Dec 2008 17:21:37 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=btopenworld.com; h=Received:X-YMail-OSG:X-Yahoo-Newman-Property:Received:Message-ID:From:To:References:Subject:Date:MIME-Version:Content-Type:Content-Transfer-Encoding:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE; b=ydaZQpUMjaHI5+vbzEzpSaxf1w5i1tQ5gH1JmpWkBPbFWKnyDAfWjUVKckcapA8M5f9TA0XDy/CfuDb0QI9SlG3fbVYbsl3CtPbiDx0aSYKG+h7NV3RhpkVqG4L184EkHXNGEmwBM7/a9l3eZUPRJYlK2rL3jLlN4bmtqWY3apQ= ; Received: from unknown (HELO w4o8m9) (james.moritz@86.134.108.92 with login) by smtp817.mail.ird.yahoo.com with SMTP; 28 Dec 2008 17:21:36 -0000 X-YMail-OSG: FUvHTbYVM1mtWCMKQdc7GQH4Ji1A0Q7SwTg8n41QgdhILBKxal7aUiMgGlur.sBVFuUpEhP6Y6srajUbP7WFXK0wJFZWNn9V6uHrCiZY8O4w_R3BptJ50leqQaJdn7aBngLATB_ddNgIRAYiKUG_q1g8 X-Yahoo-Newman-Property: ymail-3 Received: from 127.0.0.1 (AVG SMTP 7.5.552 [270.10.0/1866]); Sun, 28 Dec 2008 17:20:43 +0000 Message-ID: <000501c96910$9d6f9aa0$4201a8c0@home> From: "James Moritz" To: References: <9051.82.161.81.65.1230483108.squirrel@webmail.xs4all.nl> Date: Sun, 28 Dec 2008 17:20:42 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Karma: 0: DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: 500KHz QSB Content-Type: text/plain; charset="iso-8859-1" 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 Dear Gary, LF Group, Quoting from the Propagation chapter of the Admiralty Handbook of Wireless Telegraphy 1938 edition: "It is usually observed that the different frequency components of a modulated wave fade in a manner which is independent of each other. This has been termed "selective fading"... ...The use of ICW ["interrupted continuous wave" i.e. modulated CW as with the NDBs] at H/F is therefore a means of combating fading in telegraphic work." So the idea of increasing the signal bandwidth to combat selective fading is not entirely new... MCW beacons anyone? Cheers, Jim Moritz 73 de M0BMU