6BQ5
7 Tubes in archive
BrandGeneral Electric
ClassPentode
BaseNoval (B9A)
Filament6.3V @ 760mA
Construction
Primary TypePentode
EnvelopeT-6 1/2
Sections1
Filament / Heater
Heater NotesCoated Unipotential Cathode
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation12 W
Grid 2 Voltage300 V
Grid 1 Voltage-100 V
Cathode Current65 mA
H-C Voltage100 V
Audio Performance
Key Features
- Power-amplifier pentode
- Designed for AF power output stage
- High-fidelity amplifier usage
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Single Tube Class A Amplifier | 250V | 11300 | 40000 | 19.5 | 48mA |
| Push-Pull Class AB1 (Two Tubes) | 300V | - | 8000 | - | 72mA |
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