UX200A triode, branded RCA Radiotron, made in the United States.

The valve was used as a radio detector.

This triode was known as a 'soft' tube; the bulb contained Caesium vapour at very low pressure.

Filament battery voltage is 6 volts. Filament terminal volts is 5 volts. Filament consumption is 0.25 amp. Plate voltage maximum is 45 volts.

Physical Description

Bulb on 4 pin base.

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