6AU7
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BrandTUNG-SOL
ClassTWIN TRIODE
Base9-pin miniature
Filament6.3V @ 0.3mA
Construction
Primary TypeTwin Triode
EnvelopeGlass
Base MaterialButton
Sections2
Filament / Heater
Heater NotesSeries or Parallel operation. Warm-up time defined as time for heater voltage to reach 80% of rated voltage.
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation2.75 W
Grid 1 Voltage-600 V
Cathode Current20 mA
H-C Voltage200 V
Audio Performance
Typical THD5%
Key Features
- Medium-mu twin triode
- 9-pin miniature construction
- 600 mA series string TV applications
- Unipotential Cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 100V | 3100 | 6500 | 20 | 11.8mA |
| Class A1 Amplifier | 250V | 2200 | 7700 | 17 | 10.5mA |
Application Notes
Intended for vertical deflection amplifiers and horizontal deflection oscillators in television receivers. Identical to 12AU7 except for heater ratings and warm-up time.
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