6AC5G
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BrandSylvania
ClassHigh-mu power triode
BaseOctal
Filament6.3V @ 400mA
Construction
Primary Typetriode
EnvelopeST-12
Base MaterialOctal
Sections1
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation10 W
Cathode Current110 mA
Audio Performance
Typical THD10%
Power Output3.7 W
Key Features
- Direct coupling
- Positive grid operation
- High power efficiency
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Direct Coupled (with 6P5G) | 250V | - | - | - | 32mA |
| Class B (Two Tubes) | 250V | - | - | - | 5mA |
Application Notes
The Sylvania 6AC5G is a power triode intended for use in Class A circuits with a positive grid voltage, often driven by a 6P5G. A 25,000 ohm resistor is recommended in the grid circuit to prevent excessive current during startup.
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