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The GU-23B triode is used as an amplifier or oscillator at up to 30 MHz in RF equipment.

Cathode: directly heated, carbonized thoriated tungsten.
Envelope: glass-to-metal.
Cooling: forced air.
Height: at most 550 mm.
Diameter: at most 175 mm.
Mass: at most 15 kg.


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

Electrical Parameters
Filament voltage, V 12
Filament current, A 195-125
Anode current at zero grid voltage (at anode voltage 8 kV), A 2.9-4.3
Mutual conductance (at anode voltage 4 kV, anode currents 7 and 12 A), mA/V 41-56
Gain coefficient (at anode voltages 4 and 7 kV and anode current 7 A) 42-58
Interelectrode capacitance, pF:
input, at most 100
output, at most 2
transfer,at most 65

Limit Operating Values
Filament voltage, V 12
Anode voltage, kV 12
Filament starting current, A 315
Dissipation, kW:
anode 50
grid 2.6
Operating frequency, MHz 26
Temperature at anode, °C 200
Temperature at envelope and seals, °C 150