The 4CX10000D is a forced air cooled, ceramic—metal tetrode containing a thoriated tungsten carbide cathode with 110MHz of maximum operation frequency. The tube is used as an oscillator, amplifier or modulator, and especially well as RF linear amplifier or AF amplifier in class AB1.

GENERAL  CHARACTERISTICS
Filament Voltage            7.5  V
Filament Current             75+/-3 A
Amplification Factor  (g1-g2)                    4.5
Interelectrode Capacitance (Grouded Cathode)
Cin                                                                115  pF
Cout                                                              20.5  pF 
Cgp                                                               0.7  pF
Interelectrode Capacitance (Grouded Grid)
Cin                                                                53  pF
Cout                                                              20.5  pF 
Cak                                                               0.1  pF
Operation Position          Axis Vertical, based up or down
Cooling                                                         Forced Air
Maximum Anode Core and Seal Temprature 250   
Maximum Operating Frequency (CW)                   100MHz
Maximum Height                                                       235 mm
Maximum Diameter                                                  178.5 mm
Appro. Net Weight                                                    5.5 kg