Tube-number record
8239/3CX3000F1
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BrandEimac
ClassTriode
BaseFlexible / flying leads
Construction
Primary TypeTriode
EnvelopeMetal-Ceramic
SectionsSingle
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage6000 V
Plate Dissipation3000 W
Cathode Current2500 mA
Audio Performance
Power Output10000 W
Key Features
- Low-mu
- Forced-air cooled
- Flying leads for filament and grid connections
- Thoriated tungsten filament
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class AB1 Audio (Point 1) | 4000 V | 11000 | — | 5.6 | 2750 mA |
| Class AB1 Audio (Point 2) | 5500 V | 11000 | — | 5.6 | 2200 mA |
Application Notes
Intended for use as an audio amplifier or modulator. Cooling air flow must be started when filament power is applied.
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