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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: Greetings all, I've been listening on MF a bit more often now, and been fooled by a quite weak CW signal precisely at 472.0 kHz. "Who's that ? Damned, cannot get the complete call" :-) Listening with a narrow filter now, the 'callsign' is definitely BIA, actually the same as the sideband on 473.0 kHz (but much weaker). I wonder about the cause - do they modulate their AM transmitter with a slightly distorted sinewave (cannot imagine that), or is it an intermodulation in my own receiver ? But other aeronautical beacons don't show similar emissions. [...] Content analysis details: (-0.1 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [195.4.92.93 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (dl4yhf[at]freenet.de) -0.1 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain X-Scan-Signature: 87966b345956c8ef3389b993f6a18f4e Subject: LF: MF: 'BIA' modulation sideband at 472.0 kHz ? Content-Type: text/plain; charset=ISO-8859-15; format=flowed 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 Greetings all, I've been listening on MF a bit more often now, and been fooled by a quite weak CW signal precisely at 472.0 kHz. "Who's that ? Damned, cannot get the complete call" :-) Listening with a narrow filter now, the 'callsign' is definitely BIA, actually the same as the sideband on 473.0 kHz (but much weaker). I wonder about the cause - do they modulate their AM transmitter with a slightly distorted sinewave (cannot imagine that), or is it an intermodulation in my own receiver ? But other aeronautical beacons don't show similar emissions. Wonder if anyone else hears that 'QRP-BIA' - signal .. 73, Wolf DL4YHF / DF0WD, both near Bielefeld in JO42fd .