HFI 490
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BrandCSF (Compagnie Générale de Télégraphie Sans Fil)
ClassIndustrial HF Power Triode
Construction
Primary TypeTriode
EnvelopeGlass and Metal
Sections1
Filament / Heater
MaterialThoriated Tungsten
Warm-up Time30s
Absolute Maximum Ratings
Plate Voltage10000 V
Plate Dissipation6000 W
Grid 1 Voltage-2000 V
Cathode Current3500 mA
Audio Performance
Key Features
- Forced air cooling
- Thoriated tungsten filament
- Rugged grid structure
- Designed for dielectric heating
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Static Characteristics | 5000V | 15000 | 833 | 12.5 | 1200mA |
| HF Industrial Heating (30MHz) | 6000V | 15000 | - | - | 3200mA |
Application Notes
Anode must be mounted vertically with the anode at the bottom. Airflow should be established before filament power is applied. Max seal temperature 180°C.
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