maxi m u m ratings t ypical ope r ati o n c lass of t ype of s ervice p late p late p late s creen p late drive output operation voltage c urrent voltage voltage c urrent p ower p ower (volts) ( a mps) (volts) (volts) ( a mps) (watts) (kilowatts) a b rf power amplifer (grounded grid) 27,000 200 24,000 2,000 173 124.0 2,800.00 the 4CM2500KG/x-2274 is a ceramic/metal, wa - ter vapor cooled power tetrode designed for very high powered rf service. the 4CM2500KG has a high density thoriated tungsten mesh flament mounted on water-cooled supports. pyrolytic graphite control and screen grids are used to pro - vide the necessary stability and power dissipation rating. the maximum anode dissipation rating is 2500 kilowatts steady state. large diameter coaxial terminals are used for the control grid and the rf cathode terminals. filament power and 4 c m2500k g / x -2274 cpi | 4 c w50,000j 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 : powergrid@cpii.com the values listed above represent specifed limits for the product and are subject to change. the data should be used for basic information only. formal, controlled specifcations may be obtained from cpi for use in equipment design. c ha r acte r istics plate dissipation (max.) 2,800,000 watts screen dissipation (max.) 20,000 watts grid dissipation (max.) 8,000 watts frequency for max. rating (cw) 80 mhz max useful frequency (derated power) 210 mhz amplifcation factor (grid to screen) 6 gain 13.5 effciency 67.4% filament/cathode thoriated tungsten voltage 15.5 volts current 675 amps capacitance grounded cathode input 1150 pf output 150 pf feedthrough 5.0 pf capacitance --- input --- pf output --- pf feedthrough --- pf cooling vapor and forced air base special coaxial air socket --- air chimney --- boiler --- length 18.75 in; 476.20 mm cpi | 4 c m2500k g / x -2274 flament support cooling water connections are made through two special connectors. anode cooling water connectors are made with available hand tightened connectors. diameter 17.03 in; 432.60 mm weight 153.0 in 69.5 kg
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