a call from IPA in telegraphy (Andy Stumpf, 1987)
see this QSL-letter from the files of Rudy van Dalen (1988)
Lars Lundström received one of those 'farewell' messages
when ending the telegraph service on 500 kHz in 1998
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Callsigns:
IPA
Frequencies Voice:
2182
2656
Frequencies Morse Telegraphy:
500
511.5