Summary

Two valves.The pentode section of these valves were primarily intended for use as an intermediate frequency (I.F.) amplifier and the diode section was used as signal detector in battery powered radios. The pentode section could also be used as the first audio stage. 1.4 volt directly heated cathode.

Physical Description

Valve #1: Internal structure of a valve made from metal and mica with a 7 pin button base. Mounted on display block with second valve. Valve # 2: Tubular glass bulb with 7 pin button base. Mounted on display block with first valve.

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