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Rudy van Dalen got this friendly reply to his report in 1989...
...accompanied by this info-sheet from Trondheim-Vaernes airport
this nice QSL-card was received by Rudi Renkwitz in 2002
in 2006, Rudi Renkwitz received
this nice multi-QSL for 6 NDBs: FLR-380,
FLV-374, FN-368,
FNO-267, FT-305,
and GRK-358
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Callsigns:
GRK
Frequencies Morse Telegraphy:
351
358
.