Sovtek 5AR4 SOV Rectifier Vacuum Tube, Single Go to amazon.com Related posts Top 8 best rectifier tube: Which is the best one in 2022? FeatureFast rise, full wave rectifierExcellent choice for both Hifi and instrument amplification.Single tubeGZ34 equivalent DescriptionDirectly heated rugged heavy duty rectifier Diode. Industry standard replacement for all 5AR4/GZ34 types