8KR8
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BrandSylvania
ClassReceiving Tube
BaseMiniature 9-pin
Filament8V @ 600mA
Construction
Primary TypeTriode-Pentode
EnvelopeT-6 1/2
Base MaterialGlass
Sections2
Filament / Heater
Heater NotesSeries circuit operation
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation5 W
Grid 2 Voltage330 V
H-C Voltage200 V
Audio Performance
Key Features
- Sharp cutoff pentode
- Medium mu triode
- Video amplifier service
- Sync separator
- Sound IF amplifier
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 125V | 10400 | 4400 | 46 | 15mA |
| Pentode Section (Low Voltage) | 35V | - | - | - | 54mA |
| Pentode Section | 200V | 20000 | 60000 | - | 19.5mA |
Application Notes
Pentode section designed for video amplifier service; triode for general purpose amplifier/sync separator usage.
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