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MPT4

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ID = 2913
       
Country:
Great Britain (UK)
Brand:
Tube type:  Vacuum Pentode   Power/Output 
Identical to MPT4 = VT115 = CV1683
Similar Tubes
Other shape (e.g. bulb type):
  MPT4_5pin_Catkin
Normally replaceable-slightly different:
  TE534
Other base:
  MPT4_7pin ; MPT4_UY
Successor Tubes MKT4_5pin  
Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Ndo) Sidecontact.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1 Ampere / Indirect / Specified voltage AC/DC
Description

Pa<8W; Typ 2.5W audio output at Va=250; Ia=32mA; Rload=8k; Vg2=200; Vg1=-10;. Also available with 7 pin base and in Catkin form.

 
Information source History of the British Radio Valve to 1940   p. 147 & 189
Babani, International Radio Tube Encyclopaedia   p. 120 & 121
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49
mpt4_in262.gif
MPT4: "Trader" Service Sheet 518
Georg Richter
mpt4_so.png MPT4: rtt
Anonymous 10 Collector
More ...
Just Qvigstad 		mpt4_kennlinie.png
MPT4: Marconi Datasheet
Georg Richter
Usage in Models 9= 1931 ; 14= 1932 ; 1= 1933?? ; 2= 1933? ; 24= 1933 ; 4= 1934? ; 19= 1934 ; 1= 1935?? ; 3= 1935? ; 9= 1935 ; 3= 1936? ; 16= 1936 ; 3= 1937 ; 1= 1945?
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):109

Collection of

Pedro Prieto-Castro (E)
Klaus Rüdiger (D)
Georg Richter (D)
Fin Stewart (AUS)
Lars Nord (S)
Jacob Roschy (D)
Georges Werts (B)
Rudolf Osterkamp (D)
 
mpt4_marconi_1.jpg

MPT4
 
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