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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.

gu-5b(2)1.jpg

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

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

gu-5b(3)1.jpg
Averaged Filament Characteristic Curve Resistance of Filamentary Cathode Rc: 0.06 Om

gu-5b(3)2.jpg
Averaged Anode-Grid Characteristic Curves:
Uf = 12.6V

gu-5b(3)3.jpg
Averaged Anode Characteristic Curves:
Uf = 12.6V;
_ _ _ Pa max

gu-5b(3)4.jpg
Averaged Grid-Anode Characteristic Curves:
Uf = 12.6V