GK-71

Glass generator pentode.

Designed to amplify and generate high-frequency vibrations.

Registration - glass, with a socle.

Working position - vertical, anode up.

Cooling is natural.

Durability not less than 1000 h.

Weight no more than 320 g.

Main technical parameters of GK-71:

at Un=20 V, Ua=1500 V, Uc2=400 V, Uc3=50 V, Ia=250 mA

Filament current: 3 ±0.3 A

Reverse current of the 1st grid (at Ia=83 mA): no more than 30 μA

Anode current (at Uc=350 V and Uc1=50 V): not less than 35 mA

Emission current (at U=180 V): no more than 900 mA

Slope (at Uа= 600 V, Iа=150 and 200 mA): 4.2 ±0.7 mA/V

Gain coefficient for the 1st grid relative to the 2nd (at Ua=750 V, Uc2=300 V, Ia=130 mA): 5 ±1

Oscillatory power (with negative voltage of the 1st grid 100 V, excitation voltage 215 V): not less than 250 W

Oscillatory power (at Un=18 V, negative voltage of the 1st grid 100 V, excitation voltage 215 V, Ia=250 mA and frequency 20 MHz): not less than 200 W

Insulation resistance between electrodes, not less than: 20 MΩ

Interelectrode capacitances, pF:

    - grid-cathode 18 ±4

    - anode-cathode 17 ±7

    - grid-anode 0.15

Limiting performance characteristics of GK-71:

Filament voltage: 18-22V

Anode voltage: 1500V

2nd Grid Voltage: 400V

Anode power dissipation: 125 W

Power dissipated by the 2nd grid: 25W

Operating frequency: 20MHz

Ambient operating temperature range: from -60 to +70 С