Power - Triode ·Triode
HFI490
Industrial high-power triode for radio-frequency and industrial applications.
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 7.5 V / 120 A
Description
Industrial high-power triode for radio-frequency and industrial applications.
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater voltage
- 7.5 V
- Nominal heater current
- 120 A
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
1 physical section, each with unique specifications.
Section 1
Triode
- Transconductance
- 0.14 S
- Amplification factor
- 12.5
- Max plate voltage
- 10000 V
- Max plate dissipation
- 6000 W
Published ratings and characteristics promoted from the supplied CSF source where explicitly available. CSF HFI490 directly heated thoriated-tungsten industrial RF power triode for dielectric heating and related oscillators, requiring forced-air cooling. Maximum continuous anode dissipation 6000 W (8000 W only intermittent). The 10000 V anode limit applies to lower frequencies and falls to 7000 V at higher frequency. Published test-point gm 140 mA/V and amplification factor 12.5 at Ia 1.2 A, Va 5000 V. Heater nominal 7.5 V, 120 A; establish cooling before energizing filament.
Source-dependent data
Operating conditions by source
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.