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PM4DX

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

Base Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eo)
Filament Vf 3.8 Volts / If: 0.1 Ampere / -: Direct / -: Battery = /
Description Heater Voltage range 3.8 to 4V. 
Literature Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   

pm4dx.jpg
PM4DX: N.D.H
Nigel Hulse

 
pm3_4.png
PM4DX: Manufacturer's Literature
Emilio Ciardiello

 
Usage in Models   1= 1929 ; 2= 1931
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):   3

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