The 3CX3000A7 high-mu forced air cooled power triode provides relatively high power output as an amplifier, oscillator, or modulator at low plate voltages. The tube has a low inductance cylindrical filament tank circuit for VHF operation. Operation with zero grid bias in many applications offers circuit simplicity by eliminating the bias supply. Grounded-grid operation is attractive since a power gain of over twenty times can be obtained. 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) 4,000 Watts --225 Watts 110 MHz 160 Thoriated Tungsten 7.5 Volts 51.5 Amps Grounded Cathode 38.0 pf 0.6 pf 24 pf Grounded Grid 38.0 pf 24.0 pf 0.6 pf Forced Air Special, Coaxial ------9.00 in; 228.60 mm 4.15 in; 105.50 mm 6.2 lb ; 2.8 kg T ypical Operation Plate Screen Voltage Voltage (Volts) (Volts) Plate Current (Amps) Drive Output Power Power (Watts) (kiloWatts) C Cathode driven RF amplifier 5,000 2.5 4,800 --- 1.5 435 5.5 AB2 Cathode driven RF linear amplifier 5,000 2.5 4,800 --- 2.0 410 7.26 AB2 Grid driven RF amplifier linear amplifier AM service 5,000 2.5 4,000 --- 0.74 115 1.13 AB2 Grid driven AF amplifier or modulator 5,000 2.5 4,000 --- 3.6 115 10.5 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 Operations, 607 Hansen Way, Palo Alto, CA 94303 telephone : 1(800) 414-8823. fax : (650) 592-9988 | email : [email protected] CPI | 3cX3000A7 CPI | 4CW50,000J 3CX3000A7