22DE4

The 22DE4 electron tube is a flyback diode half-wave rectifier. It is used to convert alternating current (AC) to direct current (DC) in electronic circuits. Here are some technical specifications of the 22DE4:

• Filament Voltage: 22.4 volts
• Filament Current: 450 mA ± 30
• Maximum Diode Peak Inverse Plate Voltage: 5.5 kV
• Voltage Drop: 32 volts
• Base: Octal (K8A)

The 22DE4 is often used in vintage electronic equipment, such as televisions and radios, for its role as a voltage rectifier. It is also valued by some hobbyists and tube amplifier manufacturers for its performance as a rectifier in power supplies