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ID = 14627
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Triode, vacuum   Detector 
Identical to PM4DX
Similar Tubes
Normally replaceable-slightly different:
  1515 ; 410LF ; CV1151 ; CV1152 ; D15 ; HX406 ; SM414
Other base:
Successor Tubes NR15  

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 3.8 Volts / If 0.1 Ampere / Direct / Specified current DC = (Series working)

Heater Voltage range 3.8 to 4V.

The PM4DX is also listed as suitable for battery sets as well as for series DC operation.

Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   Tube manual 1934-35

pm3_4.png PM4DX: Manufacturer's Literature
Emilio Ciardiello

Just Qvigstad
Usage in Models 1= 1927? ; 3= 1928? ; 1= 1928 ; 4= 1929 ; 1= 1930 ; 2= 1931 ; 1= 1932 ; 1= 1935?

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):14

Collection of



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