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PT25H

Information - Help 
ID = 11553
       
Country:
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Developer: Marconi-Osram - (Valves/Tubes); GB 
Tube type:  Vacuum Pentode   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to PT25H
Similar Tubes
Normally replaceable-slightly different:
  10E/10558 ; CV1046 ; PT25 ; VT46
Successor Tubes CV1046   VT46  

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Foo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 2 Ampere / Direct / Parallel / series AC/DC
Description

Pa <25W.

 
Information source Taschenbuch zum Röhren-Codex 1948/49   
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Pages 58 & 209
Babani, International Radio Tube Encyclopaedia
 
pt25h.jpg
PT25H: RFJ
Roy Johnson

 
nt62_9.png
PT25H: Manufacturer's Literature
Emilio Ciardiello

 

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