DLL 21
0 Tubes in archive
BrandPhilips
ClassOutput Pentode
BaseLoctal B8G
Construction
Primary TypePentode
EnvelopeGlass
SectionsDouble
Filament / Heater
MaterialDirectly Heated
Absolute Maximum Ratings
Plate Voltage135 V
Grid 2 Voltage135 V
Audio Performance
Typical THD2.8%
Power Output0.3 W
Key Features
- Double system in one bulb
- Class B operation
- Flexible filament configuration
- Battery powered
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class B Push-Pull (100mA filament) | 90V | - | - | - | - |
| Class B Push-Pull (100mA filament) | 120V | - | - | - | - |
| Class B Push-Pull (200mA/2.8V filament) | 135V | - | - | - | - |
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