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GMI-5
TETRODE
The GMI-5 tetrode is used as a pulse power switch in pulse modulators in RF equipment
GENERAL
Cathode: indirectly heated, oxide-coated
Envelope: glass
Cooling: natural or forced air
Height: at most 130 mm
Diameter: at most 67 mm
Mass: at most 300 g
00041.jpg)
| OPERATING ENVIRONMENTAL CONDITIONS | |
| Vibration loads: | |
| frequencies, Hz | 5-200 |
| acceleration, m/s² | 59 |
| Multiple impacts with acceleration, m/s² | 118 |
| Single impacts with acceleration, m/s² | 245 |
| Linear loads with acceleration, m/s² | 245 |
| Relative humidity at +40 °C, %, at most | 98 |
|
BASIC DATA Electrical Parameters |
|
| Heater voltage, V | 26 |
| Heater current, A | 1.6-1.9 |
| Peak anode current (at anode voltage 20 kV, grid 1 voltage -800 V, grid 2 voltage 1.25 kV, peak grid 1 excess voltage 250 V, pulse duration 2 µs, pulse frequency 500 pulses/s), A, at least | 16 |
| Grid 2 average current (at anode voltage 20 kV, grid 1 voltage -800 V, peak grid 1 excess voltage 250 V, pulse duration 2 µs, pulse frequency 500 pulses/s), mA | 0.5-5 |
| Average grid 1 current (at anode voltage 20 kV, grid 1 voltage -800 V, excess voltage 250 V, pulse duration 2 µs, pulse frequency 500 pulses/s), mA | 0.5-3 |
| Negative cutoff voltage (at anode voltage 20 kV, grid 2 voltage 1.25 kV, anode current 0.2 mA), absolute value, V, at most | 800 |
| Interelectrode capacitance, pF: | |
| input | 40-75 |
| output | 4-13 |
| transfer, at most | 0.5 |
| Pulse duration, µs | 2 |
| Pulse frequency, pulses/s | 500 |
| Warm up time, s, at most | 180 |
| Peak anode current over 300 h of service, A, at least | 13 |
| Limit Operating Values | |
| Heater voltage, V | 23.5-28.5 |
| Anode voltage, kV | 20 |
| Grid 2 voltage, kV | 1.25 |
| Negative grid 1 voltage, absolute value, kV | 1 |
| Peak cathode current, A | 27 |
| Dissipation, W: | |
| anode | 50 |
| grid 2 | 6 |
| grid 1 | 3 |
| Pulse duration, µs | 5 |
| Temperature at bulb and glass-to-metal seals, °C | 200 |
00051.jpg)
Averaged Peak Characteristic Curves:
Uf = 26V; Ug2 = 0.75kV;
_____ anode;
_ _ _ grid 2-anode
00052.jpg)
Averaged Peak Characteristic Curves:
Uf = 26V; Ug2 = 1kV;
_____ anode;
_ _ _ grid 2-anode
00061.jpg)
Averaged Peak Characteristic Curves:
Uf = 26V; Ug2 = 1.25kV:
_____ anode;
_ _ _ grid 2-anode
00062.jpg)
Averaged Peak Grid-Anode Characteristic Curves:
Uf = 26V; Ug2 = 0.75kV
00063.jpg)
Averaged Peak Grid-Anode Characteristic Curves:
Uf = 26V; Ug2 = 1kV
00064.jpg)
Averaged Peak Grid-Anode Characteristic Curves:
Uf = 26V; Ug2 = 1.25kV