Summary
This valve is a current regulator designed to maintain a relatively constant current at a range of voltage drops. Also called a ballast tube or barretter. Manufactured by Amperite, USA.
The 4A1 is designed to pass 300 mA at a drop of 4 V.
Physical Description
4 Pin UX base.
More Information
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Acquisition Information
Unknown Acquisition Method from Unknown Source
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Classification
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Type of item
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Overall Dimensions
88 mm (Length), 29 mm (Outside Diameter)
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References
[Book] Babani, Bernard B. 1958. International Radio Tube Encyclopaedia., 1958, 310 Pages
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