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425

Information - Help 
ID = 21259
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  REGULATOR-/CONTROL-TUBE (general) 
Identical to 425

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Filament
Description used in 110V AC Sets w/70-90V Pri. Transformer 
Information source Taschenbuch zum Röhren-Codex 1948/49   
 
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425
Emilio Ciardiello

 

from Just Qvigstad

Usage in Models 1= 1935

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1

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