Pulse modulator tetrode GMI-90 for operation in pulse modulators of stationary radio engineering devices.
Decoration - glass, with a plinth.
The cathode is indirectly heated oxide.
Height - no more than 250 mm.
Diameter - no more than 145 mm.

1. Filament current 7.2 A.

2. Anode current in a pulse, not less than 40 A.

3. Anode current in a pulse (at Un=22.5 V), not less than 36 mA.

4. Current of the 2nd grid in an impulse, no more than 25 mA.

5. Current of the 1st grid, no more than 7 mA.

6. The locking voltage is negative (at Ia=0.5 mA), not more than 550 V.

7. Anode load resistance 735 Ohm.

8. Interelectrode capacitances:
– input no more than 150 pF,

– output no more than 35 pF,

– throughput no more than 10 pF.

8. Heating voltage 23.75 – 26.25 V.

9. Ambient operating temperature range
from -60 to +70 С.

10. Weight – 1.3 kg.

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