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EI

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ID = 30509
       
Country:
France
Brand: Mazda (tubes), Mazda-Belvu, Compagnie des Lampes; Paris
Tube type:  Space Charge Tetrode 
Identical to EI = E1_MAZDA

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Filament Vf 2.5 Volts / If 0.085 Ampere / Direct / Battery =
Description Elektrometer Tetrode 
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Just Qvigstad

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EI
 

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