6JL8
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BrandRaytheon
ClassTriode-Pentode
Base9-pin Miniature
Filament6.3V @ 750mA
Construction
Primary TypeTriode-Pentode
EnvelopeT-6 1/2 glass
Base MaterialGlass
Sections2
Filament / Heater
Heater NotesHeater-cathode type miniature tube
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation5 W
Grid 2 Voltage175 V
H-C Voltage200 V
Audio Performance
Typical THD10%
Power Output1.8 W
Key Features
- Sharp cut-off pentode
- Medium mu triode
- Controlled heater warm-up (8JL8 version)
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 150V | 4700 | 7500 | 35 | 10mA |
| Pentode Section | 300V | 11500 | 60000 | - | 25mA |
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