The parameters of FU-946F vacuum induction tube are as follows:

The type FU-946F tube is a high-power cermet tube with a forced air-cooled anode. The anode has a maximum dissipation power of 4.5KW. When the frequency is not higher than 110MHZ, the output power can reach 9.1KW. It is mainly used in industrial high-frequency heating equipment for oscillation and radio equipment for amplification.

1, general performance and mechanical properties:

Weight: 2.8 KG
Installation position: vertical, anode up or down

Cooling conditions:
Anode air cooling flow rate: 7 m 3 /min
Maximum temperature of shell: 250℃
Maximum sealing temperature: 250℃
Lead to the highest temperature: 200℃

2. Electrical parameters:
Filament voltage: 12.6V
Filament current: 35A
Maximum filament instantaneous current: 56A
Transconductance: 13 ma/V
Amplification factor: 21

Capacitance between poles:
Anode and gate capacitance: 15PF
Cathode and gate capacitance: 20PF
Cathode and anode capacitance: 0.8PF

3. Limit value:
Maximum frequency: 110MHz
Maximum anode DC voltage: 8KV
Maximum anode dissipation power: 4500W
Maximum gate dissipated power: 180W
Maximum anode DC current: 2A
Maximum gate DC current: 0.5A

4. Type working state:

Filament voltage: 12.6V
Anode DC voltage: 6-7KV
Anode DC current: 1.6-1.8A
Gate DC current: 250-320MA
Gate bias resistance: 3.5KΩ

5. Matters needing attention:
The filament leads are connected between two nuts. When loading and unloading the filament leads, be sure to screw the nut with two wrenches at the same time to clamp the leads. It is strictly prohibited to hold any part of the tube and screw the nut with a wrench to prevent the sealing surface of the porcelain shell from being stressed.