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525H

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ID = 28974
       
Country:
Great Britain (UK)
Brand: Radions Ltd., Radion Works; Bollington
Tube type:  TRIODE (Detail uncertain) 
Identical to 525H
First year 1926 Saga of the Vacuum Tube, Tyne page 393

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 5 Volts / If 0.25 Ampere / Direct / Battery =
Information source -- Collector info (Sammler)   

b4_base_pins~~321.png 525H: Fin Stewart
Fin Stewart


Just Qvigstad
 

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