Summary
Pentode, used as a Class A RF amplifier in radio receivers.
One of the first indirectly heated screen grid (tetrode) tubes produced in England. Indirectly heated tubes made the operation of radios from the AC mains possible.
Manufacturer: Mullard, England.
4 volt indirectly heated cathode.
Physical Description
Conical bulb, sectioned, with 5 pin UY style base mounted on display block.
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Donation from Mr S. A. Pick, 03 Mar 1941
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Manufacturer
Mullard, England, Great Britain, 1928 -1930
The latest date is approximate -
Inscriptions
Bulb: (illegible) Display block: Tetrode/S4V/Mullard
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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
106 mm (Length), 46 mm (Outside Diameter)
Valve only
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Keywords