A tetrode (screen grid valve) designed for use as a radio frequency amplifier in battery powered radios.
2 volt directly heated cathode.
The date code on the base (E 4) indicates that this valve was manufactured in November 1932.
Manufactured by: RCA Radiotron Company, Harrison, NJ, USA.
Conical bulb on 4 pin UX base with top cap.
Bulb: 32 Base: e/RCA/4/Radiotron
Type of item
124 mm (Length)