GU-5B

TRIODE

The GU-5B triode is used as a power amplifier tube at frequencies up to 110 MHz in RF equipment and RF heating generators.

GENERAL
Cathode: directly heated, carbonized thoriated tungsten.
Envelope: glass-to-ceramic.
Cooling: forced air.
Height: at most 210 mm.
Diameter: at most 100 mm.
Mass: at most 2.5 kg.

BASIC DATA Electrical Parameters
Filament voltage, V	12.6
Filament current, A	20-27
Mutual conductance (at anode voltage 3 kV. anode currents 0.4 and 0.7 A), mA/V	12-18
Gain coefficient iat 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 12cm) kW, at least	3.5

Limit Operating Conditions
Filament voltage, V	126
Anode voltage, kV:
at operating frequencies up to 30 MHz	5
at operating frequencies 30-110 MHz	4
Anode dissipation, kW	2.5
Operating frequency, MHz	110
Temperature at envelope, stem and seals, °C	150

Averaged Filament Characteristic Curve Resistance of Filamentary Cathode R_c: 0.06 Om

Averaged Anode-Grid Characteristic Curves:
U_f = 12.6V

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

Averaged Grid-Anode Characteristic Curves:
U_f = 12.6V

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