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ID = 16193
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Triode, vacuum   Power/Output 
Identical to PM254 = CV1153
Similar Tubes
Normally replaceable-slightly different:
  420SP ; L44
Other base:
First Source (s)
1929 : History of the British Radio Valve to 1940 p. 165
Successor Tubes NR16   CV1154   NR16A  

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 3.6 Volts / If 0.2 Ampere / Direct / Battery =

"Super-Power" Valve. Gm of 3 for Va=100, Ia=10.0, -Vg=15. Optimum load=6k.

Information source Taschenbuch zum Röhren-Codex 1948/49   
Babani, International Radio Tube Encyclopaedia   p. 130 & 131
- - Manufacturers Literature
Alan Scott Douglas † 16.11.15

PM254: Manufacturer's Literature
Emilio Ciardiello

PM254: Mfg. data sheet
Jay Kinnard

from Just Qvigstad

Usage in Models 3= 1929 ; 1= 1930

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):4

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