the voice mirror from LTT as recorded by Rudolf P Gröger
in about 1970
the very nice QSL folder from LTT, received in 1973 (Andreas
Schmid)
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Callsigns:
PZA **
PZB **
PZD **
PZS **
Frequencies Voice:
13675
14840
17676
18415
19230
20605
23390