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25/450

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ID = 51656
       
Country:
Netherlands
Brand: Thermion; Lent (Nijmegen)
Tube type:  Triode, vacuum   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to 25/450
Similar Tubes
Normally replaceable-slightly different:
  F704 ; T730 ; W704
Other base:
  25/450_UX
Production stop Feb.1938

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 7.5 Volts / If 1.25 Ampere / Direct
Description

This is a tube from the Thermion Technica series of power amplifiers and power rectifiers.

 
Information source - - Manufacturers Literature   1-9-1935
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Section 138, p. 186

f704_so~~2.png 25/450: rtt
Anonymous 10 Collector


Just Qvigstad
25450data.png
25/450: own collection
Peter den Boer

 

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