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High Frequency Vacuum Triodes in Oscillator (3CW20000A7). High Power Output: Max anode dissipation power of 20kW and output power of 24.2kW. Metal Ceramic Structure: Features a metal ceramic structure with a directly heating thorium tungsten cathode. High Frequency Performance: Max working frequency up to 140MHz for high frequency amplifier applications. Dual Cooling System: Anode cooled by forced water and stem cooled by forced air for efficient heat dissipation. Versatile Operation Modes: Can be operated in CW or pulse modes for linear and class C high frequency amplifiers. Robust Design: Vertical installation with coaxial design suitable for industrial voice frequency amplifiers.