Summary
General purpose triode used in AC mains powered radios and other equipment (eg AF amplifier) in the 1930s. 2.5 V indirectly heated cathode, manufactured by RCA, Harrison, NJ, USA.
Physical Description
Small conical glass bulb with five pin UY style base.
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, 1981
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Manufacturer
Radio Corporation of America (RCA), Harrison, New Jersey, United States of America, circa 1933
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Manufacturer
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Inscriptions
Bulb: (faint)56 Paper label on base: 56 Base: RCA/Radiotron
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Brand Names
RCA (Thermionic Electron Valves) , Radiotron (Thermionic Electron Valves)
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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
102 mm (Length), 38 mm (Outside Diameter)
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Keywords