Petropavlovsk Radio :
no recordings available
here a QSL by letter and PPC - including translation (Martin Foltz, 2010)
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Callsigns:
UFH
Frequencies Morse Telegraphy:
3590
6405
8451
8555
12825
13035
16990
17035
22455
Frequencies Radioteletype:
4217
4323
6360
12603
12835.5
Systems used:
50 Bd
SITOR