The ML-6421F and 6421F are medium-Mu triodes used in AM broadcast and industrial heating applications. The air-cooled anode is rated at 10 kilowatts. 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 Cgp 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) 10,000 Watts N/A 375 Watts 30 MHz 20 Thoriated Tungsten 7.0 Volts 85 Amps Grounded Cathode 30 pf 2.0 pf 19 pf N/A pf pf pf Water and Forced Air Special N/A N/A 14.5 in; 36.8 cm 8.25 in; 21 cm 30 lb; 13.6 kg T ypical Operation Plate Screen Voltage Voltage (Volts) (Volts) Plate Current (Amps) Drive Output Power Power (Watts) (kiloWatts) C Industrial Oscillator 10,000 2.2 8,000 -700 1.0 100 6.1 C Industrial Oscillator 10,000 2.2 9,000 -750 2.0 240 13.2 C Plate modulated RF amplifier (telephony) 8,000 1.8 6,000 -800 1.25 270 5.9 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 Operation, 607 Hansen Way, Palo Alto, CA 94303 telephone : 1(800) 414-8823. fax : (650) 592-9988 | email : [email protected] CPI | ML-6421F/ 6421F CPI | 4CW50,000J ML-6421F/6421F