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PT25H

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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
Predecessor Tubes PT25  
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 / Specified voltage AND current AC/DC
Description

Pa <25W.

 
Information source History of the British Radio Valve to 1940   p. 148 & 197
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Page 58, section 209
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49
nt62_9.png PT25H: Manufacturer's Literature
Emilio Ciardiello

Just Qvigstad 		pt25h_data.png
PT25H: Herstellerdatenblatt
Stefan Müller

Collection of

Roy Johnson (GB)
 
pt25h.jpg

 
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