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MPT4

Information - Help 
ID = 2913
       
Country:
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
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 (O5A, B5) (Codex=Ndo) Sidecontact
Filament Vf 4 Volts / If 1 Ampere / Indirect / Parallel, (AC/DC)
Description Pa<8W; Typ 2.5W audio output at Va=250; Ia=32mA; Rload=8k. Also available with 7 pin base and in Catkin form. 
Literature 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


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


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