3CX2500F3 vacuum electron tube, power triode
GENERAL CHARACTERISTICS
Filament Voltage 7.5V
Filament Current51.5A
Grid-Plate20mA/V
Amplification Factor 22
Grounded Filament
Input 35pF
Grid-Plate 0.9pF
Output20.0pF
Mountingvertical, anode up or down
Coolingforced air
Diameter105.56mm
Net Weight 2.8kg
Maximum Seal & Anode Core Temperature250 degrees centigrade
MAXIMUM RATINGS
Class AB audio power amplifiers or Class B modulator
Plate Voltage6000Vdc
Plate Current2.5Adc
Grid Voltage-1000Vdc
Grid Dissipation....150W
Plate Dissipation....4000W
TYPICAL OPERATION
Double tube, unless otherwise stated , the sine wave
Plate Voltage 4000 5000 6000Vdc
Grid Voltage -150 -190 -240Vdc
Plate Current 0.6 0.5 0.4Adc
Plate Current 4.0 3.2 3.0Adc
Load Impedance 2200 3600 4650
Grid Input 340 360 390V
Peak Driving 340 230 225W
Driving 170 115 113W
Plate Output 11 11 23kW
Plate Dissipation 2.5 2.5 2.5kW
MAXIMUM RATINGS
Anode modulated RF amplifier C class ( telephone call state )
Plate Voltage5500Vdc
Plate Current2.0Adc
Grid Voltage-1000Vdc
Grid Dissipation 150W
Plate Dissipation 2670W
Typical working conditions< 30MHz
Plate Voltage 4000 4500 5000Vdc
Plate Current 1.67 1.47 1.25Adc
Plate Current -450 -500 -550Vdc
Grid Current 180 140 150mAdc
Peak Grid Input 685 715 760
Driving Power 125 100 115 W
Grid Dissipation 43 30 32 W
Plate Input 6670 6615 6250 W
Plate Dissipation 1670 1315 950 W
Plate Output 5000 5300 5300 W
MAXIMUM RATINGS
RF power amplifier or oscillator
Plate Voltage6000Vdc
Plate Current2.5Adc
Grid Voltage-1000Vdc
Grid Current0.4Adc
Grid Dissipation 150W
Plate Dissipation 4000W
Typical working conditions<30MHz
Plate Voltage 4000 4500 5000Vdc
Plate Current 2.5 2.5 2.08Adc
Plate Current -300 -450 -500Vdc
Grid Current 245 265 180mAdc
Peak Grid Input 580 750 765
Driving Power 142 197 136 W
Grid Dissipation 68 78 46 W
Plate Input 10 12.5 12.5kW
Plate Output 7.5 10 10kW
