Tube-number record
8EB8
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BrandTung-Sol
ClassTriode Pentode
BaseNoval (B9A)
Filament8 V @ 0.6 mA
Construction
Primary TypeMulti-section
EnvelopeGlass Bulb
Base MaterialGlass
Sections2
Filament / Heater
Heater NotesControlled warm-up
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation5 W
Grid 2 Voltage330 V
H-C Voltage200 V
Audio Performance
Key Features
- High-mu triode
- Sharp cutoff pentode
- Controlled plate knee characteristic
- Controlled heater warm-up characteristics
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 250 V | 2100 | 47000 | 100 | 2 mA |
| Pentode Section | 200 V | 12500 | 75000 | — | 24 mA |
Application Notes
The triode section is designed for use as a voltage amplifier while the pentode section is designed for use as a video amplifier.
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