The 4CX350A/8321 has a maximum plate dissipation of 350 watts and is intended for Class AB audio or RF amplifier service. The tube is externally identical to the 4CX250B but contains rugged internal construction features. Amplification factor and cathode area have been increased over the basic 4CX250B to give higher transconductance and figure of merit. 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 ----- pf --- pf --- 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 | 4CX350A/ 8321 CPI | 4CW50,000J 4CX350A/8321