Return-Path: Received: from rly-db02.mx.aol.com (rly-db02.mail.aol.com [172.19.130.77]) by air-db07.mail.aol.com (v121_r4.4) with ESMTP id MAILINDB071-aad4957aeb42f7; Sun, 28 Dec 2008 11:52:19 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-db02.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINDB023-aad4957aeb42f7; Sun, 28 Dec 2008 11:52:06 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LGyrq-00024j-7K for rs_out_1@blacksheep.org; Sun, 28 Dec 2008 16:51:54 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LGyrp-00024a-QD for rsgb_lf_group@blacksheep.org; Sun, 28 Dec 2008 16:51:53 +0000 Received: from smtp-vbr14.xs4all.nl ([194.109.24.34]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1LGyrp-00024A-8N for rsgb_lf_group@blacksheep.org; Sun, 28 Dec 2008 16:51:53 +0000 Received: from webmail.xs4all.nl (dovemail2.xs4all.nl [194.109.26.4]) by smtp-vbr14.xs4all.nl (8.13.8/8.13.8) with ESMTP id mBSGpj3u038671 for ; Sun, 28 Dec 2008 17:51:49 +0100 (CET) (envelope-from roelof@ndb.demon.nl) Received: from 82.161.81.65 (SquirrelMail authenticated user pa0rdt) by webmail.xs4all.nl with HTTP; Sun, 28 Dec 2008 17:51:48 +0100 (CET) Message-ID: <9051.82.161.81.65.1230483108.squirrel@webmail.xs4all.nl> Date: Sun, 28 Dec 2008 17:51:48 +0100 (CET) From: "Roelof Bakker" To: rsgb_lf_group@blacksheep.org User-Agent: SquirrelMail/1.4.11 MIME-Version: 1.0 X-Virus-Scanned: by XS4ALL Virus Scanner X-Karma: 0: 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: 8bit 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-Mailer: Unknown (No Version) Hello Gary, This phenomenon can be observed on many NDB's. I have been investigating thsi and it often heppens taht one sideband completely disappears, whilst the other is strong. It is similar to selective fading as observed on broadcast stations on shortwave. Best regards, Roelof Bajjer, pa0rdt