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R3_RT

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ID = 28724
       
Country:
France
Brand: La Radiotechnique (RT); Paris, Suresnes
Tube type:  Triode, vacuum 
Identical to R3_RT
First year 1923 ?? Saga of the Vacuumtube, Tyne page 400

Base Europe 4-Pin (A, 4A, B4, since 1914)
Filament Direct / Battery =
 

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