3CX 3000A7

      The 3CX 3000A7 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.
      Here you can get some information about the characteristics of 3CX 3000A7.The plate dissipation (Max.) is 4,000 Watts.The grid dissipation (Max.) is 225 Watts.The frequency for Max. rating (CW) is 110 MHz.The amplification factor is 160.It uses oxide coated filament/cathode. Voltage is 7.5 Volts.Current is 51.5 Amps.Then is about the capacitance of grounded cathode.Input is 38.0 pf.Output is 0.6 pf.Feedthrough is 24 pf.Next is about the capacitance of grounded grid.Input is 38.0 pf.Output is 24.0 pf.Feedthrough is 0.6 pf.The cooling system uses forced air.Base select special coaxial.The inner length is 9.00 mm and the whole is 228.60 mm.The inner diameter 4.15 and the outer diameter is 105.50 mm.The Weight is 6.2 lb(2.8 kg).