6SF7
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BrandTUNG-SOL
ClassDIODE-SUPER-CONTROL AMPLIFIER PENTODE
BaseSMALL WAFER 8-PIN OCTAL
Filament6.3V @ 300mA
Construction
Primary TypeDIODE-PENTODE
EnvelopeMETAL
Base MaterialWAFER
Sections2
Filament / Heater
Heater NotesAC OR DC
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation3.9 W
Grid 2 Voltage100 V
Audio Performance
Key Features
- SINGLE-ENDED CONSTRUCTION
- COMBINED IF AMPLIFIER, DETECTOR AND A.V.C. RECTIFIER
- COATED UNIPOTENTIAL CATHODE
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| CLASS A1 AMPLIFIER | 100V | 1975 | 200000 | - | 12mA |
| CLASS A1 AMPLIFIER | 250V | 2050 | 700000 | - | 12.4mA |
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