2pcs GK-71 (gk71, гк-71) Soviet Ussr Tube / Ulyanovsk / Glass generator cheapest pentode / in original box / Same date / OTK / New nos

2pcs GK-71 (gk71, гк-71) Soviet Ussr Tube / Ulyanovsk / Glass generator pentode / in original box / Same date / OTK / New nos

2pcs in one lot

NEW UNUSED IN GOOD CONDITION

In good Condition- BUY WHAT'S IN THE PHOTO
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DESCRIPTION:

GK-71
Glass generator pentode.
Designed to amplify and generate high frequency vibrations.
Decoration - glass, with a plinth.
Working position - vertical, anode up.
Cooling is natural.
Durability not less than 1000 hours.
Weight no more than 320 g.

Main technical parameters of GK-71:
at Un = 20 V, Uа = 1500 V, Uc2 = 400 V, Uс3 = 50 V, Ia = 250 mA
Filament current: 3 ± 0.3 A
Reverse current of the 1st grid (at Iа = 83 mA): no more than 30 μA
Anode current (at Uс = 350 V and Uс1 = 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 on the 1st grid relative to the 2nd (at Uа = 750 V, Uc2 = 300 V, Iа = 130 mA): 5 ± 1
Oscillatory power (at 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: 20 MOhm
Interelectrode capacitances, pF:
- grid-cathode 18 ± 4
- anode-cathode 17 ± 7
- grid anode 0.15

Limiting performance characteristics of GK-71:
Filament voltage: 18-22 V
Anode voltage: 1500 V
2nd grid voltage: 400V
Power dissipated by anode: 125 W
Power dissipated by the 2nd grid: 25 W
Working frequency: 20 MHz
Ambient operating temperature range: from -60 to +70 С



MADE IN ~USSR~


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The price of delivery has increased significantly, but we try to almost not change the cost of delivery.

If you accidentally overpaid for delivery, we will refund your money.

If you have any questions, we are always ready to communicate and help you.

However, some delays in both Standard and Express services may happen.