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ID = 32111
Tube type:  Dual-Grid Tetrode   Frequency converter 
Identical to Bigrille_noire
Similar Tubes
Normally replaceable-slightly different:

Base Europe "B5 big size" (D, Bigrille)
Filament Vf 4 Volts / Direct / Battery =
Information source - - -   
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Usage in Models 1= 1928 ; 2= 1929

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):3

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