Summary
Triode, used as a detector and amplifier in radios, manufactured by Westinghouse Electric and Manufacturing Company (for RCA). It was introduced in 1923 and discontinued in 1926.
This tube was electrically identical to the WD11 also manufactured by Westinghouse. The WD11 was fitted with a unique base, whereas the WD12 had a UV base, in common use at the time.
Technical details: 1.1 volt directly heated cathode, dull emitter. Anode voltage 22.5 Volts
Physical Description
Four pin American UV style base.
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Donation from Mr Finlayson (Fin) Stewart, 14 Jun 1973
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Manufacturer
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Inscriptions
Bulb: (RCA logo) Paper label on bulb: Tested Ok Alpha Elec. Co. Inc On base: Radiotron WD12 Patented (RCA logo)
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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
91 mm (Length), 35 mm (Outside Diameter)
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References
[Book] Tyne, Gerald F. 1987. Saga of the Vacuum Tube., 1987, 313 Pages
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Keywords