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Electronic Valve - Amperite, Regulator, Type 4A1, 1930-1949 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
|Dimensions:||88 mm (Length), 29 mm (Diameter)|
|Tagged with:||thermionic electron valves, barretters|
|Themes this item is part of:||Engineering Collection, Information & Communication Collection|
|Secondary Classification:||Vacuum Technology|
|Manufacturer:||Amperite, United States of America, 1930-1949|