6KD8
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BrandSylvania
ClassTriode-Pentode
BaseSmall Button 9-Pin
Filament6.3V @ 400mA
Construction
Primary TypeTriode-Pentode
EnvelopeT-6 1/2
Sections2
Filament / Heater
Heater NotesCoated Unipotential Cathode
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation3 W
Grid 2 Voltage330 V
H-C Voltage200 V
Audio Performance
Key Features
- Medium mu triode
- Sharp cutoff pentode
- Combined VHF oscillator and mixer
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 125V | 7500 | - | 40 | 13.5mA |
| Pentode Section | 125V | 5000 | 200000 | - | 9.5mA |
Application Notes
Control grid to cathode spacing is of very low magnitude; do not exceed 100V DC between these elements in tube checkers.
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