Tube-number record
7791
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BrandTung-Sol
ClassIndustrial Electron Tube
BaseSpecial / none
Filament5 V @ 15000 mA
Construction
Primary TypeDiode
Rectifier TypeHalf-wave
EnvelopeMetal/Radiator
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage25000 V
Cathode Current2000 mA
Audio Performance
Key Features
- Hydrogen filled
- Internally-connected hydrogen generator
- Rugged
- Temperature free
- Flange mounting
- High-voltage surge resistant
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Rectifier Service | 25000 V | — | — | — | 2000 mA |
| Shunt Diode Service | 30000 V | — | — | — | 500 mA |
Application Notes
Designed for use in high-voltage rectifier circuits. In order to avoid damage to tube, the cathode connection must be made to the base flange only. The 7791 should be protected from transient voltages by spark gaps.
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