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) c rf a mplifer 22,500 65.0 21,000 1,500 59.0 2,700 1,025.0 c rf a mplifer p late modulated 17,500 50.0 17,500 800 50.0 2,400 700.0 a b1 rf l inear a mplifer 22,500 110.0 20,000 1,500 45.0 --- 610.0 a b1 a f a mplifer or modulator 22,500 110.0 17,500 1,500 78.0 --- 950.0 b rf a mplifer, l ong p ulse, g rounded g rid 1,000 000 24,500 1,750 94.2 7,140 1,770.0 the 8973 is a power tetrode designed for very high powered medium frequency or high frequen - cy broadcast service and a very low frequency communication in the half megawatt power range. the 8973 has a thoriated tungsten flament mount - ed on water-cooled supports. large diameter coaxial terminals are used for the control grid and the rf flament terminals. filament power and fla - ment support cooling water connections are made through special couplings with threaded clamping rings. 8973 cpi | 4 c w50,000j 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 t e l e p h o n e : 1(800) 414-8823. f a x : (650) 592-9988 | e m a i l : 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.) 1,000 kilowatts screen dissipation (max.) 7.5 kilowatts grid dissipation (max.) 2.0 kilowatts frequency for max. rating (cw) 110 mhz amplifcation factor 4.5 filament/cathode thoriated tungsten voltage 16.3 volts current 600 amps capacitance grounded cathode input 1000 pf output 165 pf feedthrough 5.0 pf capacitance n/a input n/a output n/a feedthrough n/a cooling water and forced air base special coaxial air socket n/a air chimney n/a boiler n/a length 18.75 in; 476.20 mm diameter 17.03 in; 432.60 mm weight 153.0 lb; 69.5 kg cpi | 8973
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