6B8G
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BrandBrimar
ClassDouble Diode Pentode
BaseOctal
Filament6.3V @ 300mA
Construction
Primary TypeDouble Diode Pentode
EnvelopeGlass (ST-Shape)
SectionsDouble diode and semi-vari-mu pentode
Filament / Heater
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation2.25 W
Grid 2 Voltage125 V
Audio Performance
Key Features
- Semi-vari-mu characteristics
- Multiple valve for detector and amplifier use
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Section | 100V | 950 | 300000 | - | 5.8mA |
| Pentode Section | 180V | 840 | 1000000 | - | 3.4mA |
| Pentode Section | 250V | 1000 | 800000 | - | 6mA |
| Pentode Section | 250V | 1120 | 600000 | - | 9mA |
Application Notes
The pentode sections allow A.V.C. bias application without appreciable distortion.
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