Summary
Audiotron triode, made by Elmer T. Cunningham in America, circa 1916. Used as a detector in very early radio receivers.
De Forest responded to the introduction of the Audiotron by producing the tubular audion. Manufacturer: Elmer T. Cunningham. It is almost certain that the original Expanse valve, marketed by AWAaround 1919 was an Audiotron.
Physical Description
Cylindrical bulb with connections at either end.
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Donation from Wireless Institute of Australia, Mr Max Howden, 28 Apr 1967
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Manufacturer
E. T. Cunningham, Oakland, California, United States of America, circa 1916
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Inscriptions
Handwritten label on bulb: No 26
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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
130 mm (Length), 25 mm (Outside Diameter)
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References
[Book] Tyne, Gerald F. 1987. Saga of the Vacuum Tube., 1987, 160-166 Pages
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Keywords
