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ID = 10365
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to VP4A
Similar Tubes
Normally replaceable-slightly different:
  A50N ; AC/VHP ; HP4115
Other base:

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Nc) Top contact screw type.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1.2 Ampere / Indirect / Specified voltage AC/DC

Metallised bulb only (Mullard data book 1935)

Information source History of the British Radio Valve to 1940   p. 150&196
Babani, International Radio Tube Encyclopaedia   p. 154 & 155
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49

9a1_5.png VP4A: Manufacturer's Literature
Emilio Ciardiello

Just Qvigstad
VP4A: Mullard Maintenance Manual
Achim Dassow

Usage in Models 5= 1931 ; 5= 1934? ; 11= 1934 ; 2= 1935? ; 14= 1935

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):37

Collection of



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