NDB Friedrichshafen *FHA :

 

a recording from 2009 (rb)

 

a QSL-card from the central civil aviation administration, used in the 1980's (Rudy van Dalen)
very interesting QSL letter (Patrick Robic, 1999)

 

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Callsigns:
FHA

 

Frequencies Morse Telegraphy:
473