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MPT4

Information - Help 
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
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 / Parallel, (AC/DC defined voltage)
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 Taschenbuch zum Röhren-Codex 1948/49   
  mpt4_in262.gif
  MPT4: "Trader" Service Sheet 518
Georg Richter
 
mpt4_marconi_1.jpg
MPT4
Klaus Rüdiger
 
mpt4_so.png
MPT4: rtt
Michael Schlör
 
mpt4_kennlinie.png
MPT4: Marconi Datasheet
Georg Richter

from Just Qvigstad
Usage in Models 9= 1931 ; 14= 1932 ; 1= 1933?? ; 2= 1933? ; 24= 1933 ; 3= 1934? ; 19= 1934 ; 1= 1935?? ; 2= 1935? ; 9= 1935 ; 2= 1936? ; 16= 1936 ; 3= 1937 ; 1= 1945?
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):106
Collection of Jacob Roschy (D)
Collection of Rudolf Osterkamp (D)
Collection of Georg Richter (D)
Collection of Georges Werts (B)
Collection of Klaus Rüdiger (D)
Collection of Fin Stewart (AUS)
Collection of Pedro Prieto-Castro (E)
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