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GMI-14B
TETRODE
The GMI-14B tetrode is used as a pulse power switch in RF equipment
GENERAL
Cathode: indirectly heated, oxide-coated.
Envelope: glass-to-metal.
Cooling: forced air.
Height: at most 235 mm.
Diameter: at most 148 mm.
Mass: at most 2.8 kg
00101.jpg)
| OPERATING ENVIRONMENTAL CONDITIONS | |
| Vibration loads: | |
| frequencies, Hz | 1-200 |
| acceleration, m/s² | 98 |
| Multiple impact with acceleration, m/s² | 392 |
| Ambient temperature, °C | -60 to +250 |
| Relative humidity at +35 °C, % | 98 |
|
BASIC DATA Electrical Parameters |
|
| Heater voltage (AC or DC), V | 26 |
| Heater current, A | 1.5-1.7 |
| Peak anode current (at anode voltage 3.5 kV, grid 2 voltage 2.15 kV, grid 1 bias voltage -0.9 kV, peak grid 1 excess voltage 350 V), A, at least | 130 |
| Peak grid 2 current (at anode voltage 3.5 kV, grid 2 voltage 2.15 kV, grid 1 bias voltage -0.9kV, peak grid 1 excess voltage 350 V), A, at most | 15 |
| Peak grid 1 current (at anode voltage 3.5 kV, grid 2 voltage 2.15 kV, grid 1 bias voltage - 0,9 kV, peak grid 1 excess voltage 350 V), A, at most | 22 |
| Grid 1 inverse current, µA, at most | 350 |
| Negative cutoff voltage (at anode voltage 36 kV, grid 2 voltage 2 kV, anode current 1.5 mA), absolute value, kV, at most | 1 |
| Interelectrode capacitance, pF: | |
| input, at most | 220 |
| output, at most | 35 |
| transfer, at most | 2 |
| Limit Operating Values | |
| Heater voltage (AC or DC), V | 23.5-28.5 |
| Anode voltage (DC), kV | 36 |
| Grid 2 voltage, kV | 2.15 |
| Grid 1 bias voltage, kV | -1 |
| Grid 1 excess voltage, V | 350 |
| Dissipation, W: | |
| anode | 600 |
| grid 2 | 35 |
| grid 1 | 6 |
| Peak cathode current, A | 165 |
| Maximum pulse duration, µs | 10 |
| Minimum warm up time, s | 240 |
| Minimum pulse 1/duty factor | 1,000 |
| Bulb temperature, °C | 120 |
00011.jpg)
Averaged Peak Grid 2 Characteristic Curves:
Uf = 26V; Ug2 = 2.1kV;
_____ anode;
_ _ _ grid 2-anode
00012.jpg)
Averaged Peak Grid 1-Anode Characteristic Curves:
Uf = 26V; Ug2 = 2.1kV