GU-5A

TRIODE

The GU-5A triode is used for power amplification at frequencies up to 110 MHz in RF equipment and in RF heating generators.

GENERAL
Cathode: directly heated, carbonized thoriated tungsten.
Envelope: glass-to-metal.
Cooling: forced (water for anode, air for envelope and stem).
Height: at most 210 mm.
Diameter: at most 100 mm.
Mass: at most 1 kg.

BASIC DATA Electrical Parameters
Filament voltage, V	12.6
Filament current, A	20-27
Mutual conductance (at anode voltage 3 kV and anode currents 0.4 and 0.7 A), mA V	12-18
Amplification factor (at anode voltages 2 and 4 kV and anode current 0.5 A)	60-85
Anode current at zero grid voltage (at anode voltage 4 kV), A	0.45-0.75
Interelectrode capacitance, pF:
input, at most	19
output, at most	0.5
transfer, at most	16
Output power (at wavelength 12 m), kW, at least	3.5

Limit Operating Values
Filament voltage, V	12.6
Anode voltage. kV:
at operating frequencies up to 30 MHz .	5
at operating frequencies 30-110 MHz	4
Anode dissipation, kW	3.5
Operating frequency, MHz	110
Temperature at envelope, stem and seals, °C	150

Averaged Filament Characteristic Curve: Resistance of filamentary cathode: 0.06 Om

Averaged Anode-Grid Characteristic Curves:
_______ U_f = 12.6V;
_ _ _ _ P_{a max}

Averaged Anode Characteristic Curve:
_______ U_f = 12.6V;
_ _ _ _ P_{a max}

Averaged Grid-Anode Characteristic Curves:
U_f = 12.6V

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