Summary
Audion triode electronic valve used for amplification and detection, made circa 1920.
There are three companies whose names are incscribed on this valve: Marconi, Moorhead and De Forest. The valve was almost certainly made by Moorhead
Physical Description
Cylindrical globe (with evacuation tip) on 4 pin UY style base
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Donation from Australian Wireless Valve Co (AWV Co), 23 Feb 1972
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Manufacturer
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Inscriptions
Sticker on base obscuring some text On the base: Marconi/Trade mark Fleming patent No. 803584/De Forest/US patent ***532/Sold for amateur and *** use On bulb: Moorhead 209361/Patent marking November 7 1905
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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
105 mm (Length), 45 mm (Outside Diameter)
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References
[Book] Tyne, Gerald F. 1987. Saga of the Vacuum Tube., 1977, 170 - 173 Pages
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Keywords