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GMI-30
TRIODE
The GMI-30 triode is used as a pulse power switch in pulse modulators in RF equipment
GENERAL
Cathode: directly heated, carbonized thoriated tungsten.
Envelope: glass.
Height: at most 350 mm.
Diameter: at most 140 mm.
Mass. at most: 650 g
00081.jpg)
| OPERATING ENVIRONMENTAL CONDITIONS | |
| Ambient temperature, °C | -10 to +55 |
| Relative humidity at up to +25 °C, % | 98 |
|
BASIC DATA Electrical Parameters |
|
| Filament voltage, V | 8.2 |
| Filament current, A | 15.9-17.7 |
| Mutual conductance (at anode voltage 2 kV, anode current 50 mA), mA/V | 4.8-6.8 |
| Peak cathode emission current (at peak grid and anode voltages 3 kV, pulse duration 5-10 µs, pulse frequency 50 pulses/s), A, at least | 20 |
| Peak grid voltage (at anode voltage 3 kV, grid voltage -400 V, peak anode current 15 A, pulse duration 5-10 µs, pulse frequency 50 pulses/s), kV, at most | 2 |
| Peak grid current (at anode voltage 3 kV, peak grid voltage at most 2,000 V, peak anode current 15 A, pulse duration 5-10 µs, pulse frequency 50 pulses/s), A, at most | 5 |
| Cathode emission current (at filament voltage 4.8 V) over 500 h of service, mA, at most | 300 |
| Negative cutoff voltage (at anode voltage 27 kV, anode current 0.5 mA), absolute value, V, at most | 1,200 |
| Pulse duration, µs | 5-10 |
| Pulse repetition frequency, pulses/s | 50 |
| Interelectrode capacitance, pF: | |
| input (grid-cathode) | 7-12 |
| output (anode-cathode), at least | 2 |
| transfer (anode-grid) | 4-6.6 |
| Limit Operating Values | |
| Filament voltage, V | 7.9-8.5 |
| Anode voltage, kV | 30 |
| Negative grid voltage, absolute value, kV | 2 |
| Peak anode current, A | 15 |
| Peak grid current A | 6 |
| Anode dissipation, W | 300 |
| Pulse 1/duty factor, at least | 500 |
00091.jpg)
Averaged Peak Characteristic Curves:
Uf = 8.2V; Ug = -0.4kV; t = 5 µs; pulse frequency 65 kHz
_____ anode;
_ _ _ grid-anode