The FU-3152F is a forced air cooled, ceramic?etal hign-mu amplifier factor triode containing a thoriated tungsten carbide cathode which is designed for mainly used in zero-bias RF amplifier in Class B or Power Amplifier in Class C and Oscillator and also used in grounded-grid FM Amplifier.The most attractive of the tube is that a power gain as hign as twenty times can be obtained at grounded-grid operating. GENERAL CHARACTERISTICS Filament Voltage ????? 6.3?.3 V Filament Current ????? 162?0 A Amplification ?????? 200 Interelectrode Capacitance (Grouded Cathode) Cin ?????? 61 pF Cout????? 0.2 pF Cgp ?????? 36 pF Operation Position ??ertical, base up or down Cooling ??????? Forced Air Recommend Air System Socket ?? SK-1300 Recommend Air System Chimney ?? SK-1306 Maximum Anode Core and Seal Temprature ????????? 250 ℃ Maximum Height ?????222.25 mm Maximum Diameter ???? 179.10 mm Net Weight ?????? 5.4 kg MAXIMUM RATING ABSOLUTE ＆#118alue Plate Voltage ?????? 8 kVdc Plate Current ?????? 6 Adc Plate Dissipation????? 15 kW Grid Dissipation ????? 500 W Maximum Operation Frequency ??110 MHz TYPICAL OPERATION RF Linear Amplifier - Class AB, Cathode Driven Plate Voltage ???? 7000 7000 Vdc Zero-Signal Plate Current ? 0.6 0.6 Adc Max-Signal Plate Current ? 5.0 5.92 Adc Max-Signal Grid Current ?? 1.0 1.22 Adc Driving Impedance ??? 32 27 Ω Appro. Resonant Impedance ?? 745 693 Ω Max-Signal Driving Power ?? 1540 1750 W Peak Envelope Plate Output Power ? 24.2 29.6 kW RF Amplifier - Class C, Cathode Driven CW or FM Plate Voltage ????? 7 kVdc Grid Voltage ????? -200 Vdc Plate Current ????? 4.55 Adc Grid Current ????? 1.06 Adc Driving Impedance????? 53 Ω Driving Power ????? 2600 W Plate Dissipationg ????? 6.3 kW Efficiency Output Power ???? 25.5 kW Plate Impedance ????? 800 Ω