The 3CW20000A7 is a water cooled in anode, ceramic-metal hign-mu amplifier factor triode containing a thoriated tungsten carbide cathode which is designed for mainly used in AF amplifier in class B or modulator, linear amplifier and hign frequency amplifier in class C of which the maximum of plate dissipation up 20, grid dissipation up 500W and operaing frequency up 110MHz. GENERAL CHARACTERISTICS Filament Voltage 7.5 V Filament Current 99 A Interelectrode Capacitance (Grouded Cathode) Cin 59 pF Cout 0.2 pF Cgp 36 pF Interelectrode Capacitance (Grouded Grid) Cin 59 pF Cout 36 pF Cak 0.2 pF Amplification Factor 200 Operation Position Vertical, base up or down Cooling Anode Water Stem Forced Air Maximum Seal Temperature 250 Maximum Height 285 mm Maximum Diameter 118.10 mm Appro. Weight 5.2 kg