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B425

Information - Help 
ID = 2474
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Triode, vacuum   Universal 
Identical to B425
Similar Tubes
Normally replaceable-slightly different:
  410W ; DT5
First Source (s)
Apr.1930 : Philips Bulletin

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Filament Vf 4 Volts / If 0.1 Ampere / Direct / Battery =
Information source Taschenbuch zum Röhren-Codex 1948/49   
 
b425.jpg
B425: eigene Sammlung HV
Hartmut Völler

 
b425_sock.png
B425: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

 
b425_spec.png
B425: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector


from Just Qvigstad

Usage in Models 1= 1929 ; 1= 1930? ; 8= 1930 ; 6= 1931 ; 1= 1932??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):17


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