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GI-5B

TRIODE

The GI-5B triode is used in grounded-grid oscillator circuits operating in self-excitation mode with anode keying in the frequency range 200 MHz.

GENERAL
Cathode: directly heated, carbonized thoriated tungsten.
Envelope: glass-to-metal.
Cooling: forced air.
Height: at most 450 mm.
Diameter: at most 180 mm.
Mass: at most 12 kg.

gi-5b(1)00091.jpg

OPERATING ENVIRONMENTAL CONDITIONS
Cyclic temperature effects, °C -60 to +150
Relative humidity at up to +40 °C, % 98

BASIC DATA
Electrical Parameters
Filament voltage, V 6.3
Filament current, A 385-465
Mutual conductance (at anode voltage 1 kV, anode currents 1 and 2 A), mA/V 20-30
Gain coefficient (at anode voltages 1 and 2 kV
anode current 1 A) 		20-40
Anode current (at anode voltage 3 kV), A 0.8-1.5
Interelectrode capacitance, pF, max.:
input 90
output 13
transfer 35
Peak output power, kW, at least 200

Limit Operating Values
Filament voltage, V 6.0-6.6
Peak anode voltage, kV 2.7
Dissipation, kW:
anode 6
grid 0.4
Operating frequency, MHz 200
1/duty factor 435
Anode temperature, °C 170
Temperature at envelope, stem and seals, °C 150

gi-5b(2)00011.jpg
Averaged Emission Characteristic Curves:
Uf = 6.3V

gi-5b(2)00012.jpg
Averaged Anode-Grid Characteristic Curves:
Uf = 6.3V

gi-5b(2)00013.jpg
Averaged Grid Characteristic Curves:
Uf = 6.3V