The Troposcatter Photo Gallery
For
ERP, nothing much beats a troposcatter station.
The unit is a Marconi analogue UHF tropo terminal.
A new Digital Tropscatter terminal being commissioned.
The unit with the door open is the HPA - the red thing is a klystron amplifier - this one kicks out about 2kW at 2GHz.
Another view. The terminal had dual klystron amplifiers in a duty/hot standby arrangement. The terminal had a space diversity receiver.
A close up view of the Klystron. Note the simplicity of the design and construction.
The knobs and counters on the front of the klystron body are to fine tune the cavities and would be at about +8 to 10KV with respect to the cathode and heater. Fortunately for the person attempting the tuning, the body of the klystron is at ground potential, and the cathode sits at -8 to 10KV and is enclosed by the panel upon which the klystron sits.
In many respects the klyston is an ideal device to use in a high power microwave amplifier - just apply the correct volts, an rf drive of a few milliwatts and a load and away you go. All the tuned circuits (cavities) are part of the device.
The Antenna System!
Another Troposcatter Antenna System. This one was owned by the Oil Compnay ELF and linked Soyo on the Congo River estuary with Luanda in Angola.
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Last update 7/5/2001