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World First PSK communication on 24 GHz?

On 10 June 1999 a possible world first PSK communication contact was
achieved on 24 GHz when Danny Orban ON4AOD, the builder of the Ka band
transponder for AMSAT P3-D and Peter Gülzow, DB2OS, Digital
Communications Manager and Command Station of P3-D, turned the 24 GHz
transmitter on for the final check-out after antenna adjustments. Dr.
Karl Meinzer, DJ4ZC, Project Leader of AMSAT P3-D was very delighted by
the sound of the 400 Bit/s PSK transmission and detection of the signal
using an 24 GHz to 2m Downconverter connected to the command station.
This is indeed an vivid example how amateur radio is still on top of the

The P3D Team
Lou McFadin W5DID
P3D Integration Manager

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