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PM4

Information - Help 
ID = 3796
       
Country:
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Triode, vacuum   Power/Output 
Identical to PM4
Similar Tubes
Normally replaceable-slightly different:
  SM94
Heater different:
  RE134
Other base and data slightly different:
  PM4_UX
First year 1925 History of the British Radio Valve to 1940 p. 160
First Source (s)
1925 : British Radio Valves - The Vintage Years, Thrower p.57
1925 : Saga of the Vacuum Tube, Tyne p.379

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.15 Ampere / Direct / Battery =
Description

PM4 is a British standard dull emitter valve. 4 Volts, output valve.

 
Information source Taschenbuch zum Röhren-Codex 1948/49   
 
uk_mullard_pm4.jpg
PM4
Alan Scott Douglas † 16.11.15

 
1_216.png
PM4: Telefunken Werkstattbuch
Wolfgang Bauer

 

from Just Qvigstad

Usage in Models 1= 1926 ; 1= 1927?? ; 1= 1927 ; 1= 1930??

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


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