The 3CW20,000H3 is a water cooled, ceramic/ metal, medium-mu power triode designed primarily for use in industrial radio frequency heating services. Its water cooled anode is conservatively rated at 20 kW of plate dissipation with low water flow and pressure drop. Input of 40 kW is permissible up to 90 MHz. Plentiful reserve emission is available from its 750 watt filament. The grid structure is rated at 250 watts, making this tube an excellent choice for industrial service. Class of Operation C Characteristics Plate Dissipation (Max.) Screen Dissipation (Max.) Grid Dissipation (Max.) Frequency for Max. rating (CW) Amplification Factor Filament/Cathode Voltage Current Capacitance Input Output Feedthrough Capacitance Input Output Feedthrough Cooling Base Air Socket Air Chimney Boiler Length Diameter Weight Maximum Ratings Type of Service Plate Voltage (Volts) Plate Current (Amps) RF Industrial oscillator 12,000 4.0 T ypical Operation Plate Screen Voltage Voltage (Volts) (Volts) 10,000 20,000 Watts --250 Watts 90 MHz 20 Thoriated Tungsten 7.5 Volts 99.0 Amps Grounded Cathode 53.0 pf 1.4 pf 34 pf ----- pf --- pf --- pf Water and Forced Air Flexible Filament Leads ------18.25 in; 463.50 mm 6.75 in; 171.40 mm 12.0 lb; 5.5 kg --- Plate Current (Amps) 4.0 Drive Output Power Power (Watts) (kiloWatts) 340 28.0 The values listed above represent specified limits for the product and are subject to change. The data should be used for basic information only. Formal, controlled specifications may be obtained from CPI for use in equipment design. For information on this and other CPI products, visit our website at: www.cpii.com, or contact: CPI MPP Division, Eimac Operations, 607 Hansen Way, Palo Alto, CA 94303 telephone : 1(800) 414-8823. fax : (650) 592-9988 | email : [email protected] CPI | 3cW20,000H3 CPI | 4CW50,000J 3CW20,000H3