from the archive of Rudolf P Gröger, about 1963 (sorry for
the bad quality - anyone with a better recording?)
a PPC from 1987 verifying a telex transmission (Michael Kunze)
------------------------------------------------------------
Callsigns:
HGB**
HGC**
HGD**
HGE**
HGG**
HGK**
HGM**
HGO**
Frequencies Radioteletype:
4563
5313
5400
5870
5878
6782
6840
6870
7464
9109
9125
9190
9317.5
13680
14542
15500
15670
17468
Systems used:
50 Bd