I recorded this a while ago (3rd of January 2011) when I
was scanning
MW and LW bands late at night... as one is wont to do when one is
bored. This was at my Dad's old place in Steeple Claydon, picked up
right at the bottom end of the MW band:
http://chriswoods.co.uk/files/ste-036_strange_mediumwave_signal.mp3
I turn to the UK Radio Frequency Bands website at such moments:
http://ukspec.tripod.com/spectrum.html
If this is right at the bottom end of MW, it might be the
Navtex at 518KHz if your radio can tune that low on MW.
[snip]
From the document above:
87.34.. Eurosignal paging, to 87.415 (4 x 25kHz channels A-D)
heard in UK from Europe. info.
Used to be a constant AM tone with pips and doodle-doo
noises, as featured in the song Professionnels by Air (Premiers
Symptomes), and could be heard on tuners at 87.5
Changed in March 1998 to bursts of FM data. French channel
is 87.39 (C)
But I'm no ham so others more knowledgeable might be able to
step in here.
Incroyable! You've nailed the second sound as Eurosignal paging, and you
were bang on. After more than a decade, I finally know what it is. It's eery
to hear almost the exact same sound emanating from speakers after all these
years... Was my explanation that accurate or do you just have ninja Google
abilities? I bought 10,000Hz Legend when it first came out, never even heard
(or knew they released) an album called Premiers Symptomes. Crikey.
Having just reached the end of Les Professionels, I've just realised
everyone who ever uses the track only uses the portion which loops the
ending guitar riff.
Sadly I don't think the first sound is NAVTEX, I played the file back
through decoding software (admittedly a poor recording) but it just decoded
nonsense characters even without Strict FEC enabled (see screengrab:
http://chriswoods.co.uk/files/2011_07_21-frisnit_navtex_wrongsignal.png )
Also the spectral information wasn't focused in the correct band. I may try
and tune in tonight though with the old Sanyo boombox radio I have, see if I
can pick something up at midnight...
Thanks for IDing the mystery FM audio though!
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