here is recording of the
CQ call from HSA (rb, 1983)
friendly and detailed letter (rb, 1983)
even more detailed letter, different style (Michael Oexner, 1983)
in 1985, they issued this nice QSL card (Frank Schüttig)
this letter verifies an exceptional DX-catch - 2MHz almost round
the world... (Michael Oexner, 2010)
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Callsigns:
HSA**
Frequencies Voice:
2182
2686
2746
4357
6215
6507
6513
8734
8758
13086
13116
Frequencies Morse Telegraphy:
500
526
4348.5
4349.4
7955
8573.5
8686
8743
12800
Frequencies Radioteletype:
2187.5
Systems used:
DSC