Summary
General purpose medium mu triode designed for telephone repeater use. 1 A directly heated cathode, nominal voltage 2.1 V. Used as a Class A amplifier.
Manufacturer: Western Electric , USA.
The base marking and type of base indicate that this valve was made between 1923 and 1925.
This type was manufactured from the early 1920s until the 1950s.
Physical Description
Spherical bulb with 4 pin UV style base. Arbour and filament broken.
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
Base: Western Electric Made in USA 102D Patent dates from 1-15-07 to 11-29-21
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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
109 mm (Length), 58 mm (Outside Diameter)
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Dimensions
132 mm (Length)
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References
[Book] Tyne, Gerald F. 1987. Saga of the Vacuum Tube., 1987, 281-282 & 285-286 Pages
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Keywords