no recording available...
friendly QSL letter from PTT's central office (Michael Oexner,
1986)
beautiful view-card, 'abused' as QSL (rb, 1994)
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Callsigns:
PKF
Frequencies Voice:
2182
2690
4396
6215
6215.5
6510
8800
13077
Frequencies Morse Telegraphy:
465
500
4295
8686
12682.5
Frequencies Radioteletype:
6268
6419.5
8419.5
8421
12584.5
13445.7
Systems used:
SITOR