High vacuum half wave rectifier. A pair of these valves was used in radios, amplifiers and small transmitters requiring more power than could be delivered by the type 80 full-wave rectifier. Later renamed as type 81. 7.5 volt directly heated cathode

Manufacturer: Hygrade Lamp Co., Salem, MA, USA

Physical Description

Base type: American style UX No. of pins in base: 4 Bulb shape: conical Bulb material: glass

More Information