5AR4 / GZ34 Vacuum Tube – Full-Wave Rectifier for Guitar Amp & Hi-Fi Power Supplies

The 5AR4 (GZ34) is a full-wave rectifier tube with an indirectly-heated cathode, giving amps a gentler, tube-friendly power-up compared to solid-state rectification.

• Tube type: Full-wave rectifier
• Base: Octal 8-pin
• Heater: 5V AC, 1.9A
• Typical use: Power supply rectification in guitar amps and hi-fi gear where a slow, soft voltage rise is desirable

GZ34 equivalent — interchangeable in circuits calling for either designation.