5X4G 5X4 TUBE FIVRE ITALY RECTIFIER TUBES VALVE D GETTER BLUE LABEL OLD SMOOTH PLATE HANGING FILAMENT
ONE TUBE 5X4G FIVRE MADE IN ITALY TESTED TV7D/u = 50/48 (/REFERENCE GOOD 40/40)
D GETTER BOTTOM
LONG GREY SMOOTH PLATE
HANGING FILAMENT
BLACK BASE
YELLOW FIVRE LABEL MADE IN ITALY
OLD PRODUCTION
5X4G = 5X4 = CV1851
Similar tubes other wirings: 5U4G
First Serie 26.May.1936
Sub the model 5Z3
Socket Octal (Int.Octal, IO) K8A, USA
Filament Heater Vf 5 Volt / If 3 Ampere / Direct
box 144