Description It inherits the warm sound of Chinese 5U4G tubes, but also offer you incredible details at a small price tag. Filament heating Uf..................5V If............... 3A Limit rating Anodic peak reverse voltage........1550V Anode current peak.........675mA Recommend working state The anode voltage supply ...... 2×500V Each arm impedance..........75Ω Loaded impedance..........2000Ω Filter capacitor.........4μF Rectified current........≧230mA Package Included: 1 * 1PC PSVANE 5U4G Rectifier Vacuum Tube for 274B 5Z3P Tubes Pre-amplifier