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The GU-10A triode is used for generation and power amplification in RF equipment.

Cathode: directly heated, carbonized thonated tungsten.
Envelope: glass-to-metal.
Cooling: forced (water for anode, air for bulb and stem).
Height: at most 320 mm.
Diameter: at most 100 mm.
Mass: at most 3 kg.


Ambient temperature, °C 10 to -55
Relative humidity at 25°C, % 98

Electrical Parameters
Filament voltage, V 7
Filament current, A 70-80
Mutual conductance (at anode voltage 2 kV. anode currents 2.5 and 5 A), mA/V 15-25
Gain coefficient (at anode voltages 2 and 4 kV, anode current 2.5 A) 40-45
Anode current (at anode voltage 5 kV), A 0.6-1.2
Interelectrode capacitance, pF
input, at most 40
output, at most 34
transfer, at most 1.5

Limit Operating Values
Filament voltage, V 7-7.3
Anode voltage, kV 8
Filament starting current, A 115
Dissipation, W:
anode 1.0x104
grid 300
Operating frequency, MHz 26
Temperature at envelope, stem and seals, °C 150