a recording from 1974, giving ID, time, and weather information
here a short one from 1984 (both recordings from the files of
Joe Flaska)
nice QSL card from the collection of Martin Foltz
this article from Wikipedia tells you some more details. In fact,
this was something between a time-signal station and a broadcasting
station.
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Callsigns:
WGU20
Frequencies Voice (AM)
179