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ID = 28893
Brand: Vereenigde Industrieen (N.V.V.I.); Rotterdam
Tube type:  Triode, vacuum   Detector 
Identical to VIRAD
First year 1926 Saga of the Vacuum Tube, Tyne page 427

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.08 Ampere / Direct / Battery =
Description Anode 40-100 Volt 
VIRAD: own collection
John Koster

VIRAD: own collection
Peter den Boer


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