Summary

Two electronic valves: unknown manufacturer and RCA.
Twin triode were intended for use as a push-pull class B power amplifier. With a 135 volt supply this valve could produce an output of about 2 watts. It was designed to be operated with zero bias which eliminated the need for a low impedance bias supply and the distortion caused by the commencement of grid current. 2.0 volt directly heated cathode.

Physical Description

Shouldered glass bulb with American style 6 pin base mounted on display block with a sectioned example of a similar valve (ST 022189.2). Internal structure of a twin triode with bulb removed. American style 6 pin base mounted on display block with an intact example of a similar valve (ST 022189.1).

More Information