This station was producing, for many years, time signals that
were disseminated through the german coastal radio stations 'Norddeich Radio' and 'Kiel
Radio'. DHI did not have own transmitters. For a long time,
these transmissions where the only way to get a 'real' QSL for
DAN or DAO.
Transmissions were made twice daily, at noon and at midnight,
for 5 minutes in telegraphy (A1 or A2).
this QSL-card verifies transmissions
from both stations (Willi Passmann, 1976)
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Callsigns:
DAM
DAN
DAO
Frequencies Morse Telegraphy:
2614
2775
4265
6475.5
8638.5
12763.5
16980.4