GMI-27B (ГМИ-27Б) tube Pulse modulator tetrode SET VERY RARE USSR TESTED

Description

Technical characteristics of GMI-27B:
Filament current - from 5.75 A to 6.75 A.
Filament voltage from 12 V to 13.8 V.
Anode current per pulse - not less than 20 A.
The anode current pulse at a nominal voltage of 12 V - 18 A.
The pulse duration is 30 µs.
The anode voltage of the lamps GMI-27B-10 kV.
The power dissipated by the anode - 250 watts.
The cathode current in the pulse at a duty cycle of not less than 500-34 A.
The voltage of the first grid is negative-0.8 kV.
The highest voltage of the first grid in the pulse-150 V.
Power dissipated by the first grid-3 watts.
The current of the second grid in the pulse - no more than 2 A.
The voltage of the second grid is 1 kV.
The power dissipated by the second grid 15 watts.
The current of the third grid in the pulse - no more than 3 A.
The locking voltage of the first grid - no more than -500 V.
Ready time - no more than 3 minutes.
Interelectrode capacitance of GMI-27B:
- input - from 60 pF to 80 pF;
- output - from 10 pF to 16 pF;
- checkpoint - no more than 1 pF.
The minimum time to failure - not less than 1000 hours.
Basic failure rate- 2,37·10-6 1/h.
Gamma-percent share of GMI-27B at γ=90% - 2000 hours.
Shelf life-15 years.
Overall dimensions:
- height-144 mm;
- diameter-94 mm.
Weight - not more than 0.7 kg.
Registration of GMI-27B-metal-glass.
Forced air cooling, air flow - not less than 80 m3/h.
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