The FU3051 is a triode. It has thoriated tungsten cathode and radiation cooling of plate.
The tube maximum plate dissipation is 0.8kW and maximum frequency operation is 50MHz.
The tube is designed for oscillator in the industry high frequency heating applications.
The tube could replace 6T51.
GENERAL CHARACTERISTICS
Electrical
Cathode........Thoriated Tungsten
Filament Voltage.......6.3V
Filament Current......30~35A
Transconductance......6.7mA/V
Amplification Factor..........48
Interelectrode Capacitances:
Filament to Grid.........12.1pF
Filament to Plate..0.2pF
Grid to Plate......6.5pF
Mechanical
Overall Length...256mm
Overall Diameter.155mm
Net Weight...0.62kg
Mounting Position....Vertical, Plate Up
COOLING
Cooling...Convection & Radiation
Maximum Envelope Temperature.... 250 degrees centigrade
MAXIMUM RATINGS
Frequency.....50 MHz
Filament Startup Current....49 A
Plate Voltage......6 kV
Plate Dissipation........0.8 kW
Grid Dissipation..120 W
TYPICAL OPERATION
Class C Telegraphy
Frequency...50 MHz
Plate Voltage......4 kV
Plate Current.......0.7 A
Grid Voltage............................-230 V
Grid Current.......135 mA
Grid Resistor.................................1700 ohm
Plate Dissipation......0.64 kW
Output Power....2.16 kW
