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4PenM

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ID = 10601
       
Country:
Great Britain (UK)
Brand: Six Sixty (valves), The Electron Company Ltd.; London
Tube type:  Vacuum Pentode   Power/Output 
Identical to 4PenM
Similar Tubes
Normally replaceable-slightly different:
  PM24M ; PT4 ; PT41 ; PenA1

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Foo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1.1 Ampere / Direct / Specified voltage AC/DC
Information source History of the British Radio Valve to 1940   p. 151
Wireless World (The), London (WW, 79)   November 22, 1935
Taschenbuch zum Röhren-Codex 1948/49


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