AF Kalkar :

 

listen to DHO78 working an aircraft on 5 MHz (rb, 2014)

 

this nice QSL is from the collection of Patrick Robic

 

Main site, which includes German Air Warning Center
TX-Site Uedem

 

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Callsigns:
DHO78
UY9C

 

Frequencies Voice:
4835
5687

 

Frequencies Morse Telegraphy:
4825