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A408s

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ID = 1647
       
 
   
Tube type:  Triode, vacuum 
Identical to A408s
First year 1930 Tube leaflet collection E.Erb Analysis by original leaflets

Filament
 

Usage in Models 1= 1928?? ; 1= 1929?

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

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