The 3CW2500C7/YU-157 is a rugged coaxial base power triode designed for use as a cathode driven Class AB2 or Class C amplifier. It is recommended for VHF or UHF service as a linear amplifier, power amplifier, or pulse amplifier. Linearity and power gain are both excellent due to the low ratio of grid to plate current, and the relatively high amplification factor. Low grid interception of available emission current is due to the beam forming geometry of the special grid and cathode design. 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 2,500 Watts N/A 20 Watts 500 MHz 125 Oxide Cathode 5.0 Volts 10.5 Amps Grounded Grid 35.5 pf 12.4 pf 0.14 pf N/A N/A N/A N/A Liquid Coaxial N/A N/A N/A 3.68 in; 9.34 cm 2.25 in; 5.72 cm 1.34 lb; 0.6 kg Maximum RatingsTypical Operation Class of Type of ServicePlate PlatePlateScreenPlate Operation VoltageCurrent Voltage VoltageCurrent (Volts) (Amps) (Volts) (Volts) (Amps) CCathode Driven RF Amplifier at 400 MHz ABCathode Driven RF Linear Amplifier up to 30 MHz 4,000 4,000 1.0 1.0 3,000 3,500 --- --- 1.0 0.97 Drive Output PowerPower (Watts) (kiloWatts) 83 50 1.57 2.03 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 MPP products, visit our website at: www.cpii.com, or contact: CPI Microwave Products Division, Eimac Operation,607 Hansen Way, Palo Alto, CA 94303 telephone : 1(800) 414-8823. fax : (650) 592-9988 | email : [email protected] CPI | 3CW2500C7 4CW50,000J / YU-157 3CW2500C7 / YU-157