Tampa Radio, FL :
no recording available...
a PPC from 1982 (rb)
very nice and detailed letter (Frank Schüttig, 1976)
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Callsigns:
WPD
Frequencies Morse Telegraphy:
420
500
4274
6365.5
8473
8615.5
13051.5
17169.5
17171.5
Frequencies Radioteletype:
8420
16815.5
16824
22380
22385
22394
Systems used:
SITOR