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NA420

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ID = 19233
       
Country:
Germany
Brand: Niggl-Hochvakuum-Industrie, Niggl-Audion; München
Tube type:  TRIODE (Detail uncertain) 
Identical to NA420

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Filament Vf 3.2 Volts / If 0.2 Ampere / Direct / Battery =
Description Audion, Hoch- und Niederfrequenz, Oszillator; Durchgriff: 13%; Steilheit: 0,7 mA/V; Innenwiderstand: 11 kOhm 
Information source - - -   
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Just Qvigstad

Collection of

Collection of a member from D
 
roehre_na420_niggl_bild_1.jpg

 

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