a recording from 1971
and a different version from 1973 (both: rb)
this verification letter dates from 1970, station received while
visiting the experienced DX-colleague Michael 'Mike' Kunze, who
taught me listening to SSB-signals without a BFO (rb, quite unexperienced
those days)
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Callsigns:
9UB **
Frequencies Voice:
8000
8110
10111
10121
10211
14425
14440
14558.2
14769.7
15927.1
16080
16396
16406
17420
17440
23020
Frequencies Radioteletype:
10570
Systems used:
50 Bd