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B425

Information - Help 
ID = 2474
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Triode, vacuum   Universal 
Identical to B425
Similar Tubes
Normally replaceable-slightly different:
  410W ; CY15 ; DT5 ; DW302
First Source (s)
Apr.1930 : Philips Bulletin
Aug.1930 : Philips Bulletin R1164, p. 27
Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.1 Ampere / Direct / Battery =
Information source L'ABCDaire des lampes de TSF des jeunes années   p. 41
Babani, International Radio Tube Encyclopaedia   p. 54 & 55
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49
b425_sock.png B425: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

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

Collection of

Tomasz Szczesniak (PL)
Hartmut Völler (D)
 
b425_1.jpeg

B425
 
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