Summary
General purpose triode with filament designed for operation from a single dry cell. The same as the Western Electric 215A. 1.0 volt directly heated cathode. This valve was also made and sold by STC with the type number 4215A or 125A.
Physical Description
Tubular glass bulb with top exhaust tip and small 4 contact bayonet style moulded base. Mounted on a display block with another example with its bulb removed.
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Donation from Wireless Branch, Australia: Post Master General's Department (PMG), 01 Jun 1927
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Manufacturer
The Mullard Radio Valve Co. Ltd, London, England, Great Britain, 1923-1925
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Inscriptions
Bulb: Wecovalve No. 4215A/Patented in Great Britain/17580 of 1915/180090 (6641 of 1921) Display Block: VALVE or VACUUM TUBE/With & without bulb/"Wecovalve" 4215A/Peanut type/(Brief data)
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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
66 mm (Length), 15 mm (Outside Diameter)
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Keywords