Return to KLUBNL.PL main page

[Top] [All Lists]

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
Authentication-results:; spf=neutral ( is neither permitted nor denied by best guess record for domain of [email protected]) smtp.mail=[email protected]
Delivered-to: [email protected]
Reply-to: [email protected]
Sender: [email protected]
User-agent: Mozilla/5.0 (Windows NT 5.1; rv:17.0) Gecko/20130620 Thunderbird/17.0.7
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 ..

  Wolf DL4YHF / DF0WD, both near Bielefeld in JO42fd .

<Prev in Thread] Current Thread [Next in Thread>