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LF: MF: 'BIA' modulation sideband at 472.0 kHz ?

To: RSGB LF Group at blacksheep <[email protected]>
Subject: LF: MF: 'BIA' modulation sideband at 472.0 kHz ?
From: wolf_dl4yhf <[email protected]>
Date: Fri, 10 Jan 2014 20:27:36 +0100
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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 .





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