Summary
General purpose high vacuum ("hard") triode developed during World War 1, based on the French TM valve. Manufacturer: Edison Swan Electric Co. Ltd. For Marconi's Wireless Telegraph Co. Ltd.
4 Volt directly heated cathode. Anode voltage 100 V.
Physical Description
Spherical bulb, with evacuation tip, mounted on with 4 pin European style base with metal shell. Bulb internally discoloured.
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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Manufactured For
Marconi's Wireless Telegraph Co. Ltd., England, Great Britain, circa 1918
Edison Swan Electric Co. Ltd. For Marconi's Wireless Telegraph Co. Ltd. -
Inscriptions
Bulb: R/11486/Marconi's W.T. Co. Ltd./Made in England Paper label on base
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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
110 mm (Length), 55 mm (Outside Diameter)
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References
[Book] Tyne, Gerald F. 1987. Saga of the Vacuum Tube., 1987, 217, 218, 372 Pages
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Keywords