listen to this recording from the collection of Willi Passmann
Dieter Pohlmann received
this detailed prepared post card as QSL (1989)
see this friendly verification letter from the collection of
Nils Schiffhauer (1990)
a very nice QSL card, showing their latest aircraft (rb, 1990)
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Callsign:
Y4A
Frequencies Voice:
6753
8984
11237.5
15046
17975
23225