Tube-number record
6AS7G
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BrandTUNG-SOL
ClassTwin Triode
BaseOctal
Filament6.3 V @ 2500 mA
Construction
Primary TypeTriode
EnvelopeST-16
Base MaterialPhenolic
Sections2
Filament / Heater
Heater NotesMinimum cathode heating time: 30 seconds
Absolute Maximum Ratings
Plate Voltage275 V
Plate Dissipation14 W
Cathode Current125 mA
H-C Voltage300 V
Audio Performance
Key Features
- High Perveance
- Low Plate Voltage Operation
- Series Regulation
- Any Mounting Position
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Series Regulator | 135 V | 7000 | — | 2 | 125 mA |
Application Notes
Widely used as a passing tube or series regulator in electronically regulated power supplies. For parallel operation, cathode resistors are recommended to equalize current division. A 30-second cathode warmup is recommended before plate voltage is applied.
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