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PT4

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ID = 3850
       
Country:
Great Britain (UK)
Brand: MO Valve Co. Ltd.; GB
Tube type:  Vacuum Pentode   Power/Output 
Identical to PT4
Similar Tubes
Normally replaceable-slightly different:
  4PenAAC ; 4PenM ; PT4N ; Pen4VB ; PenA1 ; PenA4
Heater different:
  PT4_Ferranti
Multiple differences or of other kind:
  N30
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
Description

The tube was re-designed in 1932 to have a heater current of 1A.

 
Information source The Saga of Marconi Osram Valve   p. 152 & 333
History of the British Radio Valve to 1940   p. 148 & 187
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49
pt4_so.png PT4: rtt
Anonymous 10 Collector

Just Qvigstad 		pt4_kennlinie.png
PT4: Marconi Datasheet
Georg Richter
More ...
Usage in Models 1= 1930 ; 1= 1931?? ; 13= 1931 ; 2= 1932? ; 8= 1932 ; 2= 1933 ; 1= 1935? ; 1= 1935
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):29

Collection of

Etienne Flemal (B)
Maciej Bialecki (PL)
 
pt4.jpg

PT4
 
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