The 4CX350AC/8321A is a compact air cooled tetrode. This product is intended for use in equipment which normally uses the 4CX350A, and where extended tube life is a concern. Externally, the 4CX350AC/8321A is identical to the 4CX350A. Electrical characteristics are the same in both tube types with the exception that the heater warmup time is increased to 40 seconds in the 4CX350AC/8321A. 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) 350 Watts 8 Watts 0 Watts 110 MHz 13 Oxide Coated 6.0 Volts 2.9 Amps Grounded Cathode 23.6 pf 5.6 pf .03 pf Grounded Cathode 23.6 pf 5.6 pf .03 pf Forced Air 9 Pin Special SK-600A SK-606 --2.47 in; 62.60 mm 1.64 in; 41.60 mm 4 oz; 113 gm T ypical Operation Plate Screen Voltage Voltage (Volts) (Volts) Plate Current (Amps) Drive Output Power Power (Watts) (kiloWatts) AB1 RF linear amplifier 2,500 0.30 2,200 400 0.29 --- 0.385 AB1 AF amplifier or modulator 2,500 0.30 2,200 400 0.58 --- 0.770 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 | 4CX350AC/ 8321A CPI | 4CW50,000J 4CX350AC/8321A