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ID = 47657
Brand: Common type Italy tube/semicond.
Tube type:  Transmitting Triode, air cooled 
Identical to DV2_Italy
First year 1924 ? -- Collector info (Sammler)

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Filament Direct
Description This was a transmitting triode advertised for use at 'little wavelengths up to 50W' around 1923 by 'Ing. Agostino Del Vecchio', Via Cesare Correnti 8, Milano. Very soon A. Del Vecchio moved to Monza to work at Zenit. 
Literature -- Original-techn. papers.   Di tubo in tubo, Soresini, pg.96
DV2_Italy: Italian ad, 1925
Alessandro De Poi


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