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Brand New Ceramic Vacuum Electron Tube CTK25-4,Power Triode Tube CTK25-4

High Frequency welding machine Power Triode vacuum Tube CTK25-4

CTK25-2/CTK15-2/CTK12-4 tube is a high power triode of cermet coaxial structure, direct heat carbide thorium tungsten cathode, core column forced air cooling and anode water cooling. Mainly used for video oscillation and amplification.

Characteristic parameter

Filament voltage... 7.2 V

The filament current... 180A

Transconductance (Ia=10A).................... ≥190mA/V


Amplification factor... 40

Electrode capacitance:

The anode and grid... 60pF

The cathode and gate... 185pF

The cathode and anode... 3pF

Maximum operating frequency........................ 100MHz


Maximum height... 408mm

A maximum diameter of... 191mm

Weight (about)... 15.6 kg

Installation method............... Vertical, anode up or down

Cooling way... water-cooling

Water connection thread............ Inch standard pipe thread 1 "casing and seal maximum temperature................ 240 ℃ or less




Limit operating condition


Frequency... 100MHz


Anode DC voltage....................... 16.8 kV


Dc current anode... 25A


Anode input power........................ 375kW


Anode loss... 120kW


Grid DC voltage....................... -2000V


Grid DC current


Add load... 7A


Do not add load... 8.5 A


The dissipation power grid... 3kW


The grid current impedance... 10 k Ω