7T69RB power triode tube

Triode tube 7T69RB is a forced air cooled, ceramicmetal triode containing a thoriated tungsten cathode intended for use as an industrial oscillator. GENERAL CHARACTERISTICS Filament Voltage 12.6 V Filament Current 35 A Transconductance (Ia=0.8A) 13 mA/V Amplification Factor 21 Interelectrode Capacitance Grid Plate 13 pF Grid Cathode 18 pF Plate Cathode 0.7 pF Maximum Operating Frequency 110MHz Maximum Height 240 mm Maximum Diameter 127 mm Weight 2.8 kg Operation Position Vertical Cooling Forced Air Minimum Air Flow 7 m3/min Minimum Static Pressure 343 Pa Maximum In-coming Air Temprature 45 Maximum Anode Core and Seal Temprature 250 MAXIMUM RATING ABSOLUTE #118alue RF Power Amplifier and Oscillator - Class C Telegraphy DC Plate Voltage 8 8 kV DC Plate Current 2 2 kV DC Grid Current 0.5 0.6 A Plate Dissipation Power 4500 5500 W Grid Dissipation Power 150 230 W TYPICAL OPERATION(Oscillation #118alue) DC Plate Voltage 6 7 8 kV DC Plate Current 1.6 1.8 1.8 kV Plate Output Power 7.1 9 10 A DC Grid Current 250 320 310 mA Grid Impedance 3.5 3.5 4 kΩ