The 3CX2500A3 are forced air cooled, ceramic—metal hign-mu amplifier factor triodes containing a thoriated tungsten carbide cathode, intended for use in AM, FM, and TV service.Its coaxial filament and grid terminals insure low-inductance connection to these electrodes and allow operation at maximum ratings through 110MHz.

GENERAL  CHARACTERISTICS
Filament Voltage                           7.5  V
Filament Current                           51.5  A
Transconductance                        20 mA/V
Amplification  Factor                   22
Interelectrode Capacitance (Grouded Cathode)
Cin                      35  pF
Cout                    0.9  pF 
Cgp                     20  pF
Operation Position                 Vertical
Cooling                                    Forced Air
Maximum Anode Core and Seal Temprature   250 ℃
Maximum Height                                  228.6 mm
Maximum Diameter                             105.56 mm
Weight                                                   2.8 kg