a recording from 2012 of
PS's morse signal (rb)
this communication sheet
from Rotterdam airport dates from 1979 (Rudy van Dalen)
see here the approach chart of Rotterdam airport, and a QSL letter
(Rudy van Dalen, 1982)
look at the nice QSL card from the aviation administration (Rudy
van Dalen, 1982)
look at the antenna, located in idyllic landscape (Ary Boender,
2012)
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Callsigns:
PS
Frequencies Morse Telegraphy:
369