Summary

Full wave rectifier for equipment drawing up to 120mA at up to 580V. 4 V indirectly heated cathode, manufactured by British Thomson-Houston Co. Ltd., England.

By using an indirectly heated cathode it was possible to reduce the cathode plate spacing relative to directly heated types, resulting in a substantially lower voltage drop.

A further advantage of the indirectly heated cathode was that the warm-up time of the rectifier matched that of the other valves in the equipment, preventing the occurrence of a voltage peak prior to the full load coming on to the power supply.

Physical Description

Bulging cylindrical glass bulb with European four pin base.

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