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4-1

Information - Help 
ID = 17935
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Current Regulator, Urdox with FeH 
Identical to 4-1

Base UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=B)
Filament
Description used in 2V - Battery Sets 
Text in other languages (may differ)
Information source Taschenbuch zum Röhren-Codex 1948/49   
Ballast Tube Handbook, The   
 
0_ball_6_32.png
4-1
Emilio Ciardiello

 

from Just Qvigstad

Usage in Models 3= 1936?? ; 14= 1938 ; 2= 1939?? ; 1= 1939? ; 3= 1940?? ; 1= 1940 ; 4= 1941??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):28

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