one tube type 5Y3g Fivre made in Italy old production
black plate rugged
foil getter bottom
brown base
yellow label
old production
rare vintage vacuum tube
power rectifier full wave
tested strong 54/44 on tube tester TV7D/U military tube tester instrument calibrated ( good at 40/40 )
5Y3G = 5Y3 = R52
Socket Octal K8A
Filament Heater Vf 5 Volt / If 2 Ampere / Direct
full wave rectifier Power supply
box 150