The 3CX2500F3 are forced air cooled, ceramic—metal hign-mu amplifier factor triodes containing a thoriated tungsten carbide cathode, intended for use in industrial RF heating service. The flexible base leads for grid and filament connection serve to simplify socketing in low-frequency applications.

GENERAL  CHARACTERISTICS
Filament Voltage                7.5  V
Filament Current                 51.5  A
Transconductance               20 mA/V
Amplification Factor             20
Interelectrode Capacitance (Grouded Cathode)
Cin                                                        35  pF
Cout                                                       0.9  pF 
Cgp                                                        20  pF
Operation Position                        Vertical, base up or down
Cooling                                           Forced Air
Maximum Anode Core and Seal Temprature        250 ℃
Maximum Height                                                              468.30 mm
Maximum Diameter                                                         105.56 mm
Weight                                                                               3.4 kg