Tube-number record
6AD7-G
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BrandRCA
ClassTriode-Power Amplifier Pentode
BaseOctal
Filament6.3 V @ 850 mA
Construction
Primary TypeMulti-section
EnvelopeST-14
Base MaterialMedium Shell Octal 8-Pin
Sections2
Filament / Heater
Heater NotesCoated Unipotential Cathode
Absolute Maximum Ratings
Plate Voltage375 V
Plate Dissipation8.5 W
Grid 2 Voltage285 V
Audio Performance
Typical THD8%
Power Output3.2 W
Key Features
- Phase Inverter Operation
- Triode and Pentode in one bulb
- High Power Output in Push-Pull
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Unit - Class A | 250 V | 325 | 19000 | 6 | 4 mA |
| Pentode Unit - Class A | 250 V | 2500 | 80000 | — | 34 mA |
| Pentode Unit Push-Pull Class AB1 (per tube) | 375 V | — | — | — |
Application Notes
In circuits where the cathode is not directly connected to the heater, the potential difference between heater and cathode should be kept as low as possible. Typical push-pull operation paired with a 6F6-G.
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