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ID = 3763
United States of America (USA)
Brand: Sylvania (Hygrade, GTE, Nilco); Emporium (PA)
Tube type:  Current Regulator, Iron in Hydrogen   Power-supply 
Identical to 50A1
Similar Tubes
Normally replaceable-slightly different:

Base Noval, 9 pin miniature (USA pico-9) B9A
Description Gas filled ballast tube designed to maintain a relatively constant current over a specified operating voltage range.
Used in Zenith TransOceanics A-600, B-600

Text in other languages (may differ)
Tube prices 2 Tube prices (visible for members only)
Information source Ballast Tube Handbook, The   

50A1: Zenith A600 schematic excerpted and redrawn
Gary Brandenburger

50a1pindiagramfromzenitha600.gif 50A1: Zenith A600 schematic included with radio, annotated
Gary Brandenburger

Just Qvigstad
50A1: Sylvania
Günther Stabe † 19.8.20

Usage in Models 1= 1953 ; 2= 1954 ; 2= 1955? ; 3= 1955 ; 1= 1956? ; 3= 1956 ; 2= 1958 ; 2= 1959

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):16

Collection of



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