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Electronic Valve - Amperite, Regulator, Type 4A1, 1930-1949 Object Reg. No: ST 029230

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.
4 Pin UX base.
Acquisition Information:
Donation from Returned Servicemen's League (RSL) Victorian Branch
Discipline: Technology
Dimensions: 88 mm (Length), 29 mm (Diameter)

More information

Tagged with: thermionic electron valves, barretters
Themes this item is part of: Engineering Collection, Information & Communication Collection
Primary Classification: ELECTRONICS
Secondary Classification: Vacuum Technology
Tertiary Classification: regulation
Manufacturer: Amperite, United States of America, 1930-1949
  1. [Book], Bernard Babani, International Radio Tube Encyclopaedia, Bernards (Publishers) Ltd., London, 1958, 1958, 310 Pages

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