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This directly heated pentode from Cossor has lost its identification label. The etching on the top of the envelope gives the makers name plus a 10 and V5 but does not include the type designation of this valve. The style suggests 1930s. and the C embossed in the anode would identify it as Cossor even without further markings.
The classic envelope is 48 mm in diameter and, excluding the B5 base pins, is 113 mm tall.
Reference: Observation.


Updated January 17, 2013.
shape:classic construction:pinch type:pentode base:b5 pins:5 pin:
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