,Cathode Ray Tubes,Ceramic Tubes,CFA,chemical synthesis,chromenes,CO2 sensors,Communication,composite membranes,condensed heterocycles,Control Tubes,CWT,database,Devices,Diodes,Discharger,Display Tubes,Electron Tubes,Electron,antitumor,artificial organs,artificial skin,Attenuators,Audio tubes,Backward Wave Oscillator,Band filtering,Beam tubes,biocompatibility,biomaterials,biosensors,Broadcast,Broadcasting Tubes,Broadcasting,carbon dioxide isolation3CX300A1,4CX400A,4CX800A,4X150A,6360,6BK4,6BQ7.6C19,6C33C,6D22S,6N1P,6S19P,7034,813,829A,832A,833A,absorbent,Acquisition,Aircraft,Amateur Radio,Amateur,Amplifiers,Antenna amplifiers,anticancer compounds,antitumor agent,Broadcast Tubes,Transmitting Tubes,Transmitting,Broadcast,Russia,component,Navigator,product,characteristics,tube,technical,information,diagram">

GU-68A

TRIODE

The GU-68A triode is used for power amplification at up to 30 MHz in stationary RF transmitters.

GENERAL
Cathode: directly heated, carbonized thoriated tungsten.
Envelope: metal-ceramic.
Cooling: forced (water for anode, air for stem).
Height: at most 530 mm.
Diameter: at most 215 mm.
Mass: at most 24 kg.

gu-68a(1)00101.jpg

OPERATING ENVIRONMENTAL CONDITIONS
Ambient temperature, °C -10 to +55
Relative humidity at up to +25 °C, % 98

BASIC DATA
Electrical Parameters
Filament voltage, V 20
Filament current, A 300-330
Mutual conductance (at anode voltage 1 kV, anode currents 10 and 14 A), mA/V 115-145
Gain coefficient (at anode voltage 1 and 2 kV, anode current 10 A) 30-38
Anode current (at anode voltage 0.3 kV, grid voltage 100 V), A, at least 8
Negative cutoff voltage (at anode voltage 10 kV, anode current 0.1 A), absolute value, V, at most 400
Interelectrode capacitance, pF:
input, at most 300
output, at most 6
transfer, at most 105

Limit Operating Values
Filament voltage (AC or DC), V 19-21
Anode voltage (DC), kV 12
Cutoff voltage, absolute value, kV 1.5
Filament starting current, A 450
Dissipation, kW:
anode 130
grid 2.3
Operating frequency, MHz 30
Temperature at stem and metal-to-ceramic seals, °C 175

gu-68a(2)00011.jpg
Averaged Anode Characteristic Curves

gu-68a(2)00012.jpg
Averaged Characteristic Curves:
_____ anode-grid;
_ _ _ grid

gu-68a(2)00013.jpg
Averaged Grid-Anode Characteristic Curves