7t85rb, 5kw ท่ออิเล็กตรอน Fu7085f เทียบเท่า 7t85rb สำหรับเครื่องทำความร้อน HF Dielectric

Triode tube 7T85RB / FU7085F
The FU7085F is a ceramic-metal triode. It has 
thoriated tungsten cathode and forced air cooling of 
plate. 
The tube maximum plate dissipation is 2.5kW
(Intermittent) and maximum frequency operation is 
110MHz. 
The tube is designed for oscillator in the industry high 
frequency heating applications. 
The tube can replace 7T85RB. 


GENERAL CHARACTERISTICS 

Electrical 
Cathode....................Thoriated Tungsten
Filament Voltage...…................6.3V
Filament Current...….....….......31~38A
Transconductance...…..............…5mA/V
Amplification Factor.....................21
Interelectrode Capacitances: 
Filament to Grid...........….….…....15pF 
Filament to Plate.................0.5pF
Grid to Plate...........…...........13pF
Mechanical 
Overall Length............…......…221mm
Overall Diameter................…φ130mm
Net Weight...............….......….2.5kg
Mounting Position...…Vertical, Plate Up or Down

COOLING 
Cooling.........…..........…..…Forced Air
Air Flow.........….............…≥3.3m3
/min
Static Pressure Loss….......…......... ≥170Pa
Maximum Envelope Temperature......… 250 degrees centigrade


TYPICAL OPERATION
                                 Continious ,  Intermittent
Plate Voltage.….....…. 7.5,   8        kV 
Plate Current.......... 0.9,  1.0      A 
Grid Current…...…...... 200, 250    mA
Grid Resistor...….... 4500, 4500 ohm
Output Power......... 5.1, 6           kW
Note : 
Values for intermittent service are those for 30 
seconds of operating time and 50% of duty Factor.