5AR4 GZ34

The 5AR4 and GZ34 are both designations for a specific type of vacuum tube rectifier. These tubes are commonly used in power supply circuits of audio amplifiers to convert alternating current (AC) to direct current (DC). Here are some key specifications for these rectifier tubes:

5AR4:

• Type: Full-Wave Rectifier
• Maximum Plate Voltage: 1550 V
• Maximum Plate Current: 250 mA
• Filament Voltage: 5 V
• Filament Current: 1.9 A
• Rectifier Configuration: Dual Anode

GZ34:

• Type: Full-Wave Rectifier
• Maximum Plate Voltage: 400-450 V (depending on the version)
• Maximum Plate Current: 250 mA
• Filament Voltage: 5 V
• Filament Current: 1.9 A
• Rectifier Configuration: Dual Anode

Both the 5AR4 and GZ34 are dual-anode rectifiers, meaning they have two anodes (plates). They are known for their ability to handle higher voltage levels compared to some other rectifier tubes. The GZ34 is essentially the European designation for the same tube type as the 5AR4.

These rectifier tubes are often used in tube amplifiers where a smooth and gradual voltage ramp-up is desired. The choice between 5AR4 and GZ34 may depend on the specific requirements of the amplifier circuit, and in many cases, they are interchangeable without significant issues.

When replacing a rectifier tube, it’s important to check the specifications and guidelines provided by the amplifier manufacturer to ensure compatibility and proper functioning of the amplifier. Different rectifier tubes can have subtle differences in their voltage drop characteristics, and this can affect the performance of the amplifier.