5x4 Fivre quad tube quartet of tubes (4 pieces ) made in Italy full wave rectifier vacuum tubes valves

fully tested

Test results

tube 1 = 50/50

tube 2 = 50/50

tube 3 = 54/54

tube 4 = 45/45

features: Smooth plate D getter bottom , hanging filament , Long plates , internal welded , holed plate 3 holes per plate large D getter Military version , long life tubes , Made in Italy , Black base

tube valve lampe röhre tsf 진공관 真空管 HAM RADIO audio hi-end hi-fi diy POWER AMPLIFIER Pre-Amplifier Preamp Pri VINTAGE stereo SE Single Ended PP Push-Pull VACUUM TUBES röhren valves

box 21