Consider the (alleged) negative altitude and rather wet destination of
many transmissions at low frequencies and the effort+encryption put into
sending these. They don't need to use ancient stop start signalling in
most cases as there are plenty of better ways of achieving bit sync.
A few are also possibly commercial private navigation systems.
You could try direction finding and co-ordinate with someone a long way
off to get some sort of triangulation. DF is quite reliable with loops
at these frequencies provided you stay away from nearby conductive
structures.
If you could decipher the message content you would probably have to be
shot !
Andy G4JNT
-----Original Message-----
From: Soegiono, Gamal [mailto:[email protected]]
Sent: 2001-01-03 15:12
To: '[email protected]'
Subject: LF: decoding FSK signals below 153 kHz
Hello all,
there are about 51 frequencies/stations below
153 kHz sending signals modulated with FSK
(or derivates thereof). The only stations
realy readable are 147k3 (weather brodcast
from P>
I am not dreaming of de-chiphering the chiphered
message contents!
All I want is to let the decoder display a stream
of ASCII characters in order to eventually
see some station call signs or something else which
can point me to the origin of those signals.
Any idea?
best 73 de Gamal
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