Original vintage oldest production Fivre made in Italy y
hanging filament
black plate smooth plate rugged ruggedized anode
internal welded reinforced plate with silver support
pan getter welded bottom
big black base
Coke Bottle long Neck
St shape
embosses black base
top round logo oldest production
tested strong 50/52 on tube tester TV7D/U military tube tester instrument calibrated ( good at 40/40 )
great tube full wave vintage vacuum rectifier for tube amplifier with 45 / 50 tubes in the last stage audio
80 = R80_USA = EX680 = UX280 = VT-80 = KX80 = 80G = 280 = RGN380 = V580 = 180 = ER80 = 113A = 480 = P280 = RE-1 = CX380 = G-80 = PH280 = KX-280 = 110E/59 = 1560-ux = CL-80 = AC80 = PM280 = PU080 = ER280 = MX280 = X-280 = CV1708 = V510 = VT159_GPO = 680 = PR280 = DX280 = SX280 = VX280 = NU-80 = C-80 = TS280 = RayX-280 = RYB280 = Z80_Zenith = GX280 = TC280 = T-80 = SLX280 = C-280 = NX-280
box 145