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3-220

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ID = 17931
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Current Regulator, Iron in Hydrogen 
Identical to 3-220

Base UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Bc)
Filament
Description

I quer 1 System/A = 0.3 Umax V = 130

 
Information source Taschenbuch zum Röhren-Codex 1948/49   
Ballast Tube Handbook, The   

0_ball_6_29.png 3-220
Emilio Ciardiello


Just Qvigstad
 

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