5U4
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ClassFull-Wave Vacuum Rectifier
BaseOctal
Construction
Primary TypePower Rectifier
Rectifier TypeFull-wave
EnvelopeGlass
Base MaterialPlastic
Sections2
Filament / Heater
MaterialCoated
Absolute Maximum Ratings
Plate Voltage550 V
Cathode Current275 mA
Audio Performance
Key Features
- Directly heated cathode
- High current output
- Glass envelope
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Full-wave Rectifier (Capacitor Input Filter) | 450V | - | - | - | 225mA |
Application Notes
The 5U4 is a common power supply rectifier used in high-fidelity audio amplifiers and guitar amplifiers.
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