Return-Path: Received: from rly-me02.mx.aol.com (rly-me02.mail.aol.com [172.20.83.35]) by air-me05.mail.aol.com (v121_r4.4) with ESMTP id MAILINME053-9a14957b24037b; Sun, 28 Dec 2008 12:07:16 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-me02.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINME025-9a14957b24037b; Sun, 28 Dec 2008 12:07:14 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LGz6K-0002Oh-KS for rs_out_1@blacksheep.org; Sun, 28 Dec 2008 17:06:52 +0000 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LGz6K-0002OY-3z for rsgb_lf_group@blacksheep.org; Sun, 28 Dec 2008 17:06:52 +0000 Received: from mk-filter-2-a-1.mail.uk.tiscali.com ([212.74.100.53]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1LGz6I-0007GK-D2 for rsgb_lf_group@blacksheep.org; Sun, 28 Dec 2008 17:06:52 +0000 X-Trace: 123897182/mk-filter-2.mail.uk.tiscali.com/B2C/$b2c-THROTTLED-DYNAMIC/b2c-CUSTOMER-DYNAMIC-IP/88.106.121.196/None/g4wgt@tiscali.co.uk X-SBRS: None X-RemoteIP: 88.106.121.196 X-IP-MAIL-FROM: g4wgt@tiscali.co.uk X-MUA: Microsoft Office Outlook 11Produced By Microsoft MimeOLE V6.00.2900.3350 X-IP-BHB: Once X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AgkFAAJBV0lYannE/2dsb2JhbACDQkCGB4Mqr2lYjnMGhj4 X-IronPort-AV: E=Sophos;i="4.36,292,1228089600"; d="scan'208";a="123897182" Received: from 88-106-121-196.dynamic.dsl.as9105.com (HELO asus) ([88.106.121.196]) by smtp.tiscali.co.uk with ESMTP; 28 Dec 2008 17:06:44 +0000 From: "Gary - G4WGT" To: References: <9051.82.161.81.65.1230483108.squirrel@webmail.xs4all.nl> Date: Sun, 28 Dec 2008 17:06:44 -0000 Message-ID: <00c101c9690e$a96f1da0$6401a8c0@asus> MIME-Version: 1.0 X-Mailer: Microsoft Office Outlook 11 In-Reply-To: <9051.82.161.81.65.1230483108.squirrel@webmail.xs4all.nl> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3350 Thread-Index: AclpDNAuevAyp+Y0QVO6rxMh20YJ0AAAW4CA X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: RE: LF: 500KHz QSB Content-Type: text/plain; charset="US-ASCII" 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 Graham & Roelof, Thank you for your comments, I must find some documentation on the effect & improve my knowledge on the subject. I have quickly benefitted from my wide & slow SpecLab display using the Softrock Lite SDR. 73 Gary - G4WGT. -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Roelof Bakker Sent: 28 December 2008 16:52 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: 500KHz QSB 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