Summary
Triode, used as a class A power output amplifier. Manufacturer: Mullard Radio Valve Co. Ltd. England, similar to the American type 50.
7.5 volt directly heated cathode.
Physical Description
Conical bulb (with evacuation tip) with 4 pin European style base.
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Donation from I. E. Morton, 10 Mar 1972
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Manufacturer
The Mullard Radio Valve Co. Ltd, England, Great Britain, circa 1928
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Inscriptions
Bulb: Mullard Radio Valve/DO20 Paper label on base:
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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
140 mm (Length), 53 mm (Outside Diameter)
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References
[Book] Mullard Rapid Valve Guide, 1928-1929., 20 Pages
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Keywords