6391
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BrandMullard
ClassVoltage amplifying pentode
BaseSpecial 8-lead subminiature
Filament6.3V @ 200mA
Construction
Primary TypePentode
EnvelopeGlass T-3
Filament / Heater
Heater NotesTo reduce the possibility of hum the heater should be operated from D.C.
Absolute Maximum Ratings
Plate Voltage175 V
Plate Dissipation1 W
Grid 2 Voltage175 V
Cathode Current16 mA
Audio Performance
Key Features
- Subminiature
- Low microphony
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical | 100V | 3000 | 180000 | - | 7mA |
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