The 3CX1500A3 is a forced air cooled, ceramic—metal hign-mu amplifier factor triode containing a thoriated tungsten carbide cathode which is designed for mainly used in zero-bias RF amplifier in Class B or Power Amplifier in Class C and Oscillator and also used in grounded-grid FM Amplifier.The most  attractive of the tube is that a power gain as hign as twenty times can be obtained at grounded-grid operating.

GENERAL  CHARACTERISTICS
Filament Voltage      6.3±0.3  V
Filament Current      162±10  A
Amplification             200
Interelectrode Capacitance (Grouded Cathode)
Cin        61  pF
Cout      0.2  pF 
Cgp       36  pF
Operation Position          Vertical, base up or down
Cooling                             Forced Air
Maximum Anode Core and Seal Temperature     250      
Maximum Height             222.25 mm
Maximum Diameter        179.10 mm
Net Weight                     5.4 kg