Glass triode The anode dissipation power is 20KW max. The output power will up to 30KW when the frequency is less than 25MHz. The FU-431S is water cooling glass triode. The anode dissipation power is 20KW max. The output power will up to 30KW when the frequency is less than 25MHz. It is used as oscillator in industrial HF heating equipments. And used as amplifier and modulation in radio ...