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The 5794 is a fixed tuned CW UHF oscillator. It contains a pencil triode and tuned cavities to produce an output of 300 mW.

The RVC logo and on the right is the tuning screw.

The heater wires and short cathode tube connection.

The anode seal and at the lower left is the coaxial output port.

The clamp holding the outer cylinder closed and a better view of the output probe.

Diagram of the internal structure.

See also 6C21D.

The thin metal tube envelope is 22 mm in diameter and, excluding the base wires, is 600 mm tall.

References: Data-sheet. Type 5794 was first introduced in 1956. See also 1956 adverts.

Absolute Maximum Operating Conditions^¶

Thanks to Frank Philipse for supplying the above PDF datasheet.