Summary
Small output pentode. No data can be found. The 2.5 V filament is very unusual for an English valve which suggests that it was intended as a substitute for an American type.The suppressor grid is connected internally.
Manufacturer: Cossor, England.
2.5 V, 0.7 A directly heated cathode.
The filament voltage and current are hand written on the paper label as is the type number; this, along with the absence of any published data suggests that this may have been a prototype or a custom type made to order.
Physical Description
Conical bulb on four pin UX style base with side contact.
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Unknown Acquisition Method from Unknown Source, 19 Apr 1972
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Manufacturer
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Inscriptions
Paper label on bulb: COSSOR/Fil. V. 2.5/Fil A. .7/2.5 PEN
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Brand Names
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Classification
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Category
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Discipline
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Type of item
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Overall Dimensions
114 mm (Length), 51 mm (Outside Diameter)
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