3CX 1200D7/YU -121

      The 3CX1200D7/YU-121 is a high-mu, forced air cooled, rugged, ceramic/metal power triode intended for use as a grounded grid, zero bias class AB2 amplifier.
      It has many important characteristics which is as follows :  Plate Dissipation (Max.) is 1,200 Watts; Grid Dissipation (Max.) is 50 Watts; Frequency for Max. rating (CW) is 110 MHz; Amplification Factor is 200; Filament/Cathode is thoriated tungsten; Voltage is 6.3 Volts; Current is 25.0 Amps; Capacitance of grounded cathode: Input is 17.6 pf; Output is 0.57 pf; Feedthrough is 9.7 pf; Cooling is forced air; Base is 5 pon special; Air socket is SK-410; Air chimney is SK-446; Length is 5.0 in, 12.7 mm; Diameter is 3.5 in, 8.9 cm; Weight is 2.36 lb, 1.07 kg.
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