Summary
Used as a Class A power output amplifier in radios and manufactured by Radio Corporation of America. It was introduced in 1925 and has a 3.3 volt directly heated cathode. It was the first American valve designed to drive a loudspeaker in dry battery powered radios.
Physical Description
3.3 Volt directly heated cathode on a Four pin American (UX) 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
Paper label on bulb: "USE IN LAST AUDIO STAGE ONLY" On base: RADIOTRON UX-120
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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
105 mm (Length), 30 mm (Outside Diameter)
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References
[Book] Tyne, Gerald F. 1987. Saga of the Vacuum Tube., 1987, 315, 316 Pages
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Keywords