The electron tube 8F76R is a high- power transmitting tetrode with coaxial metal-ceramic structure. It is forced air cooled and directly-heated thoriated tungsten cathode. The frequency is 250MHz max. And the anode dissipation is 15KW max. The output power is 10KW. It has the character of good linearity, high gain and long life. It is mainly used in FM and TV transmitter, high energy accelerator and so on. It is specially suitable for oscillator, amplifier, and modulator.