5U4GB vacuum tube

grabcad

Vacuum tube 5U4GB, a stalwart rectifier with a direct heated filament, has been a staple in countless electronic devices since its introduction in 1938. Despite being out of production for decades, it can still be sourced from Russia and China or obtained as new old stock. Both audiophile and guitar amp builders consistently choose this tube due to its reliability and performance, with the model presented here based on a sample labeled "Teonex," a brand that re-badged tubes in days past.