N108
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BrandMarconi
ClassOutput Pentode
BaseB7G
Filament-V @ 0.1mA
Construction
Primary TypePentode
EnvelopeTubular
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage165 V
Plate Dissipation9 W
Grid 2 Voltage165 V
H-C Voltage150 V
Audio Performance
Typical THD10%
Power Output4.1 W
Key Features
- Miniature
- Indirectly Heated
- Low microphony
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Pentode | 165V | 9500 | 23200 | 220 | 53mA |
| Triode Connection | 165V | 12000 | 835 | 10 | - |
| Push-pull Class AB1 Pentode | 165V | - | - | - | 107mA |
Application Notes
Any mounting position. Free air circulation preferable. If canister used, surfaces should be blackened.
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