Summary
This valve combined detector, first audio stage and output valve in the one envelope. It was intended for use in portable radios. It was popular with manufacturers because it saved a valve and the space it occupied.
Manufactured by RCA, USA.
1.4 volt directly heated cathode.
Physical Description
Tubular glass bulb with top cap and octal 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
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Manufacturer
Radio Corporation of America (RCA), Harrison, New Jersey, United States of America, 1939-1945
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Inscriptions
Base: RCA/ELECTRON/TUBE/(RCA logo)/(paper label)1D8 DUD
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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
82 mm (Length), 32 mm (Outside Diameter)
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Keywords
