Tube-number record
6895
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BrandRCA
ClassHalf-Wave Mercury-Vapor Rectifier
Base4-pin
Construction
Primary TypeRectifier
Rectifier TypeMercury-Vapor
EnvelopeT20
Base MaterialMetal or Shell
Sections1
Filament / Heater
MaterialCoated
Warm-up Time30s
Absolute Maximum Ratings
Plate Voltage20000 V
Cathode Current2500 mA
Audio Performance
Key Features
- High-voltage rectifier
- Mercury-vapor type
- Vertical operating position
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| In-Phase Operation | 20000 V | — | — | — | 1800 mA |
| Quadrature Operation | 20000 V | — | — | — | 2500 mA |
Application Notes
X-rays are produced when operated above 16,000 volts inverse. Adequate shielding is required for health protection. Maintain condensed-mercury temperature within specified ranges.
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