Delivered-To: daveyxm@virginmedia.com Received: by 10.50.237.98 with SMTP id vb2csp150489igc; Fri, 10 Jan 2014 12:57:59 -0800 (PST) X-Received: by 10.180.160.166 with SMTP id xl6mr4505063wib.43.1389387478933; Fri, 10 Jan 2014 12:57:58 -0800 (PST) Return-Path: Received: from post.thorcom.com (post.thorcom.com. [195.171.43.25]) by mx.google.com with ESMTP id i8si4362881wje.55.2014.01.10.12.57.58 for ; Fri, 10 Jan 2014 12:57:58 -0800 (PST) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1W1iwt-0008RG-NP for rs_out_1@blacksheep.org; Fri, 10 Jan 2014 20:44:59 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1W1iwt-0008R4-AW for rsgb_lf_group@blacksheep.org; Fri, 10 Jan 2014 20:44:59 +0000 Received: from smtp-vbr12.xs4all.nl ([194.109.24.32]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1W1iwq-0001LP-TT for rsgb_lf_group@blacksheep.org; Fri, 10 Jan 2014 20:44:57 +0000 Received: from pc-roelof (ndb.demon.nl [82.161.81.65]) (authenticated bits=0) by smtp-vbr12.xs4all.nl (8.13.8/8.13.8) with ESMTP id s0AKitbg051496 for ; Fri, 10 Jan 2014 21:44:55 +0100 (CET) (envelope-from roelof@ndb.demon.nl) To: rsgb_lf_group@blacksheep.org References: <52D049A8.8060705@freenet.de> Date: Fri, 10 Jan 2014 21:44:55 +0100 MIME-Version: 1.0 From: "Roelof Bakker" Message-ID: In-Reply-To: <52D049A8.8060705@freenet.de> User-Agent: Opera Mail/1.0 (Win32) X-Virus-Scanned: by XS4ALL Virus Scanner X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hello Wolf, This phenomenon is quite common for NDB's from the east But not only there. A nice example is UK based NDB CWL on 423 kHz. Instead of two sidebands +/- 400 Hz it transmits a sideband at + 400 and + 800 Hz. [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [194.109.24.32 listed in list.dnswl.org] X-Scan-Signature: 59677119386dcf9f1872cb454dc1331d Content-Type: text/plain; charset=iso-8859-15; format=flowed; delsp=yes Subject: Re: LF: MF: 'BIA' modulation sideband at 472.0 kHz ? 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 Hello Wolf, This phenomenon is quite common for NDB's from the east But not only there. A nice example is UK based NDB CWL on 423 kHz. Instead of two sidebands +/- 400 Hz it transmits a sideband at + 400 and + 800 Hz. BIA is by far not a worst case example. Some Russian and Ukrain NDB's have multiple sidebands and at close range can cover up to +/- 5 kHz from the carrier. The cause is poor modulation or a faulty transmitter as in the case of CWL. 73, Roelof Bakker, pa0rdt