GZ37, Mullard NOS rectifier

GZ37 – Full-Wave Rectifier NOS (New Old Stock)

The GZ37 is a full-wave rectifier tube developed by Mullard, designed for use in high-voltage power supplies where both reliability and low voltage drop are required. It features an indirectly heated cathode for soft-start performance and can handle high current and voltage levels. The GZ37 was commonly used in high-fidelity audio amplifiers and professional equipment, valued for its rugged construction and smooth rectification characteristics. ([r-type.org](https://www.r-type.org/exhib/aaa0109.htm))

• Tube Type: Full-Wave Rectifier
• Base: Octal (K8A)
• Heater Voltage: 5.0V
• Heater Current: 1.4A
• Typical Anode (Plate) Voltage: 2 × 500V (maximum)
• Use Cases: High-voltage rectification in hi-fi amplifiers, broadcast, and lab equipment
• Equivalents: U54, CV378, 53KU

The product image is not necessarily taken of the product being sold. Always check the datasheet for specs. The values listed are taken from various sources and may not always be accurate.