Summary

Directly heated triode designed for high frequency amplification and detection with 6 Volt filament; manufactured by Cossor, Great Britain. Bulb has been removed for display purposes. When this valve was first made, it was not given a type number; this came later.

Physical Description

Valve with bulb removed with 4 pin European style base mounted on display block with valve (ST 021550). The stand has an exhibition label attached.

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