GMI-27A
Impulse modulating tetrode for impulse modulators.
Case type – metal-glass.
Cooling: forced
Anode – liquid, not less than 0.5 l/min
Envelope and base – air, not less than 20 m3/h
Lifetime not less than 1000 h
Mass 900 g.
Technical parameters
| Filament current, A | 6.25±0.5 |
| Anode impulse current, not less than, A | 20 |
| Anode impulse current (at filament voltage 12 V), not less than, A | 18 |
| 2nd grid impulse current, not more than, A | 2 |
| 1st grid impulse current, not less than, A | 3 |
| 1st grid negative cut-off voltage, not more than, V | 500 |
| Warm-up time, not more than, min | 3 |
| Interelectrode capacitance, pF input output input-to-output | 70±10 13±3 not more than 1 |
Operational limits
| Filament voltage, V | 12..13.8 |
| Anode voltage, kV | 10 |
| 2nd grid voltage, kV | 1 |
| 1st grid negative voltage, kV | 0.8 |
| 1st grid maximum impulse voltage, V | 150 |
| Anode power dissipation, W | 250 |
| 2nd grid power dissipation, W | 15 |
| 1st grid power dissipation, W | 3 |
| Cathode current (at pulse ratio not less than 500), A | 34 |
| Impulse duration, mks | 30 |
| Envelope temperature, oC | 150 |
| Ambient air temperature, oC | -60..+85 |
