The 290A is a radial beam pentode intended for use as a linear amplifier. The anode is forced-air cooled and has a maximum dissipation rating of 5 kilowatts. Class of Operation AB1 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 linear amplifier 8,000 2.0 pf pf pf Forced Air Special 7-Pin SK-291A N/A N/A 7.25 in; 18.4 cm 5.53 in; 14.05 cm 9.15 lb; 4.15 kg T ypical Operation Plate Screen Voltage Voltage (Volts) (Volts) 6,000 5,000 Watts 50 Watts 2 Watts 30 MHz 3.4 Oxide 6.0 Volts 17 Amps Grounded Cathode 56 pf 18 pf 0.13 pf 750 Plate Current (Amps) 1.74 Drive Output Power Power (Watts) (kiloWatts) 200 6.275 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 | 290A CPI | 4CW50,000J 290A