Jamestown Meteo :
a recording of the RTTY test tape (rb, 1984) just case you have no decoder at hand ;-)
this PPC from the collection of Tom Rösner gives the whole transmission schedule valid in 1982
here a PPC with wonderful stamps on it (rb, 1984)
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Callsigns:
GHH
Frequencies Radioteletype:
6824
9044
13373
17414
22777.5
22822
22980
23997
Systems used:
50 Bd