The 3CX20,000A3 is a forced air cooled, ceramic/ metal, medium-mu power triode designed primarily for use in industrial radio frequency heating services. Input of 84 kW is permissible up to 90 MHz. Plentiful reserve emission is available from its 1600 watt filament. The grid structure is rated at 800 watts, making this tube an excellent choice for industrial service. Class of Operation 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) 20,000 Watts --750 Watts 90 MHz 20 Thoriated Tungsten 10.0 Volts 160 Amps Grounded Cathode 70.0 pf 2.3 pf 43 pf ----- pf --- pf --- pf Forced Air Coaxial SK-1300 ----10.00 in; 254.0 mm 8.00 in; 203.0 mm 19.5 oz; 8.8 kg T ypical Operation Plate Screen Voltage Voltage (Volts) (Volts) Plate Current (Amps) Drive Output Power Power (Watts) (kiloWatts) C Grid driven RF amplifier 12,000 8.0 10,000 --- 7.9 960 64.0 C Grid driven RF amplifier plate modulated 6,500 5.5 6,500 --- 5.0 1,500 27.5 AB Grid driven RF linear amplifier 8,000 8.0 7,500 --- 7.4 400 40.0 AB Grid driven AF amplifier or modulator 8,000 8.0 7,500 --- 14.8 800 80.0 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 | 3cX20,000A3 CPI | 4CW50,000J 3CX20,000A3