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GK-71

PENTODE

The GK-71 pentode is used for generation and power amplification in stationary RF equipment.

GENERAL
Cathode: carbonized thoriated tungsten.
Envelope: glass, with base.
Height: at most 195 mm.
Diameter: at most 68 mm.
Mass: at most 320 g.

gk-71(1)1.jpg

Limit Operating Values
Filament voltage, V 18-22
Anode voltage, kV 1.5
Grid 2 voltage, V 400
Dissipation, W:
anode 125
grid 2 25
Frequency, MHz 20

OPERATING ENVIRONMENTAL CONDITIONS
Ambient temperature, °C -10 to +55
Relative humidity at up to +25 °C, % 98
Vibration loads:
frequency, Hz 16-22
acceleration, m/s² 49

BASIC DATA
Electrical Parameters
Filament voltage, V 20
Filament current, A 2.7-3.5
Mutual conductance (at anode voltage 600 V, grid 2 voltage 400 V, grid 3 voltage 50 V, anode currents 150 and 200 mA), mA/V 3.1-4.9
Gain coefficient (grid 1 -grid 2) (at anode voltage 750 V, grid 2 voltages 300 and 400 V, grid 3 voltage 50 V, anode current 130 mA) 4-6
Interelectrode capacitance, pF:
input 14-22
output 10-24
transfer,at most 0.15
Output power (at 5-200 MHz, anode voltage 1.5 kV, arid 2 voltage 40Q V, firid 1 voltage -100 V, grid 3 voltage 50 V), W, at least 200

gk-71(2)1.jpg
Averaged Anode Characteristic Curves:
Uf = 20V; Ug2 = 0.3kV; Ug3 = 50V

gk-71(3)1.jpg
Averaged Anode Characteristics:
Uf = 20 V; Ug2 = 0.4 kV; Ug3 = 50 V;
Pa max

gk-71(3)2.jpg
Averaged Grid-Anode Characteristic Curves:
Uf = 20V; Ug2 = 0.4kV; Ug3 = 50V

gk-71(3)3.jpg
Averaged Characteristic Curves:
Uf = 20V; Ug2 = 1.5kV; Ug3 = 50V
_____ anode-grid;
- - - - grid 2

gk-71(3)4.jpg
Averaged Anode-Grid 2 Characteristic Curves:
Uf = 20V; Ug2 = 0.3kV; Ug3 = 50V

gk-71(3)5.jpg
Averaged Grid Characteristic Curves:
Uf = 20V; Ug2 = 1.5kV; Ug3 = 50V

gk-71(3)6.jpg
Averaged Grid 2 Anode Characteristic Curves:
Uf = 20V; Ug2 = 0.4kV; Ug3 = 50V

gk-71(4)1.jpg
Averaged Characteristic Curves:
Uf - 20V; Ug2 = 0.3kV: Ug3 - 50V;
_____ anode-grid;
_ _ _ grid 2

gk-71(4)2.jpg
Averaged Characteristic Curves:
Uf = 20V; Ug2 = 0.4kV; Ug3 = 50V;
_____ anode-grid;
_ _ _ grid 2