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.

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

Averaged Anode Characteristic Curves:
U_f = 20V; U_g2 = 0.3kV; U_g3 = 50V

Averaged Anode Characteristics:
U_f = 20 V; U_g2 = 0.4 kV; U_g3 = 50 V;
— • — P_{a max}

Averaged Grid-Anode Characteristic Curves:
U_f = 20V; U_g2 = 0.4kV; U_g3 = 50V

Averaged Characteristic Curves:
U_f = 20V; U_g2 = 1.5kV; U_g3 = 50V
_____ anode-grid;
- - - - grid 2

Averaged Anode-Grid 2 Characteristic Curves:
U_f = 20V; U_g2 = 0.3kV; U_g3 = 50V

Averaged Grid Characteristic Curves:
U_f = 20V; U_g2 = 1.5kV; U_g3 = 50V

Averaged Grid 2 Anode Characteristic Curves:
U_f = 20V; U_g2 = 0.4kV; U_g3 = 50V

Averaged Characteristic Curves:
U_f - 20V; U_g2 = 0.3kV: U_g3 - 50V;
_____ anode-grid;
_ _ _ grid 2

Averaged Characteristic Curves:
U_f = 20V; U_g2 = 0.4kV; U_g3 = 50V;
_____ anode-grid;
_ _ _ grid 2

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