Large audio output pentode, a single valve was capable of producing up to 12 watts of output.
4 volt directly heated cathode.

Physical Description

Conical globe style glass bulb with American type 5 pin (UY) base. A very robust pentode structure is visible inside. The valve is packaged in its original cardboard carton. The valve is held in an inner box suspended by a number of strips of elastic fabric which have deteriorated but still keep the inner box centred. A descriptive leaflet with some data was packed in the carton with the valve.

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