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The GU-23A triode is used for generation and power amplification in stationary RF equipment.

Cathode: directly heated, carbonized thoriated tungsten.
Envelope: glass-to-metal.
Cooling: forced (water for anode and leads of cathode and grid, air for stem, envelope and seals).
Height: at most 560 mm.
Diameter: at most 230 mm.
Mass: at most 11 kg.


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

Electrical Parameters
Filament voltage, V 12
Filament current, A 195-225
Mutual conductance (at anode voltage 5 KV anode currents 7 and 12 A), mA/V 42-56
Gain coefficient i at anode voltages 5 and 8 kV and anode current 7 A) 42-57
Anode current (at anode voltage 8 kV ana zero grid voltage), A 3-4.3
Interelectrode capacitance, pF:
input, at most 100
output, at most 3
transfer, at most 65

Limit Operating Values
Filament voltage, V 11.5-12
Anode voltage (DC), kV 11
Filament starting current, A 315
Dissipation, kW:
anode 60
grid 2.6
Operating frequency, MHz 26
Temperature at envelope, stem and seals, °C 150