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B438K

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ID = 13813
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Triode, vacuum   RF/IF-Stage 
Identical to B438K
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
Information source -- Collector info (Sammler)   
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Section 98, p. 132
Taschenbuch zum Röhren-Codex 1948/49

Just Qvigstad
Usage in Models 1= 1931? ; 2= 1931
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):3

Collection of

Collection of a member from FIN
Torbjörn Hansson (S)
 
b438_pic_1.jpg

B438K
 
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