Summary
Directly heated power output pentode designed for use in battery operated equipment. Used as a Class A power amplifier. 2 V directly heated cathode, manufactured by National Union Radio Corporation, Orange, NJ, U.S.A.
Physical Description
Shouldered glass bulb on five pin UY style base.
More Information
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Collection Names
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Collecting Areas
Engineering, Information & Communication, Public Life & Institutions
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Acquisition Information
Unknown Acquisition Method from Unknown Source, 1981
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Manufacturer
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Inscriptions
Base: NATIONAL/UNION/X Paper label on base: 1F4 Bulb: 1F4/MADE IN U. S. A. paper label on bulb: QUALITY APPROVED *** SPECIAL EXPORT TEST
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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
117 mm (Length), 45 mm (Outside Diameter)
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Keywords