Summary
Small power triode, derived from the US Army type VT-2. The 205-D replaced the 205-B in 1924. Used as a Class A power output amplifier.
Patent numbers rather than dates on the base indicate manufacture after 1927
Manufacturer: Western Electric , USA.
4.5 V directly heated cathode.
Physical Description
Spherical bulb (with evacuation tip) on 4 pin UY style base. The bayonet pin is rotated 45° from the normal position to prevent lower power valves from being pugged into sockets designed for this type. Internal glass arbour is 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
Bulb: Western Electric/205-D/Made in USA/Patent Numbers from 1209234 to 1565603
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Brand Names
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Classification
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Discipline
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Type of item
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Overall Dimensions
107 mm (Length), 59 mm (Outside Diameter)
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References
[Book] Tyne, Gerald F. 1987. Saga of the Vacuum Tube., 1987, 283,284 & 287 Pages
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Keywords