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I4090

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ID = 72065
       
Country:
France
Brand: Dario (tubes) - voir aussi La Radiotechnique
Tube type:  Screen-grid Tetrode   RF/IF-Stage 
Identical to I4090
First year Dec.1929 L'Histoire Singulière du Tube Radio; G. Duperray 2009
First Source (s)
01.Dec.1929 : Radio Magazine N°320
15.Dec.1930 : Bulletin SFR N°2
Successor Tubes I4091  

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 Top contact screw type.
Was used by Radio/TV-reception etc.
Filament Indirect / Specified voltage AC/DC
Description

Le type I4090 est mentionnée par G. Duperray dans " L'Histoire Singulière du Tube Radio".

 


Just Qvigstad
Usage in Models 2= 1930

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2
 

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