The 5681K is a high power triode suitable for industrial and broadcast applications as well as other applications where a 75 kW water cooled anode is desirable. The 5681K uses ceramic as the vacuum envelope for ruggedness and high reliability. At reduced ratings the 5681K is useful up to 88 MHz. 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) 75,000 Watts N/A 1200 Watts 30 MHz 25 Thoriated Tungsten 12.0 Volts 220 Amps Grounded Cathode 79 pf 60 pf 2.4 pf pf pf pf Water and Forced Air Special N/A N/A N/A 19.75 in; 50.2 Cm 8.03 in; 20.4 Cm 43 lb; 19.5 kg T ypical Operation Plate Screen Voltage Voltage (Volts) (Volts) Plate Current (Amps) Drive Output Power Power (Watts) (kiloWatts) C CW oscillator or amplifier 15,000 12 14,000 500 1.6 52 8.5 C Plate modulated RF amplifier (telephony) 10,000 9.0 10,000 n/a 7.4 2100 57.0 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 Operation, 607 Hansen Way, Palo Alto, CA 94303 telephone : 1(800) 414-8823. fax : (650) 592-9988 | email : [email protected] CPI | 5681K CPI | 4CW50,000J 5681K