Summary
Directly heated power output triode. Could produce an output of 4.6 watts in class A at its maximum 450 V plate supply. 7.5 V directly heated cathode, manufactured by RCA, USA for Cunningham, USA. This valve is popular with audiophiles (phools) for what they consider to be good sound.
Physical Description
Large shouldered glass bulb with four pin UX 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
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Manufactured For
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Inscriptions
Base: (RCA logo)/CUNNINGHAM/MADE IN U. S. A./RADIOTRON/LICENSED/AS STATED/ON CARTON Label on base: 50 Bulb: 50
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Brand Names
Radiotron (Thermionic Electron Valves) , RCA (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
148 mm (Length), 62 mm (Outside Diameter)
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Keywords