Description
Pulse modulator tetrode tube GMI-83 in glass design with an indirectly heated oxide cathode with natural or forced air cooling. Designed to amplify high-frequency oscillations in pulse modulators with an anode voltage per pulse of up to 20kV and a current per pulse of more than 15A. The GMI-83 pulse modulator tetrode is used in general-purpose radio equipment. Available in glass design with 4-pin electrode leads and a separate anode lead.
Works in a vertical position, with the terminals facing down.
Equivalent to tube EV575
- Stamp of technical control department of the manufacturer ” ОТК “
Technical specifications:
- Filament current: 2.0 ± 0.35A
- Anode current per pulse: is at least 15A
- Anode current in a pulse (at Un=22V): no less than 12A
- Anode current at the beginning of the characteristic (at Un=27V, Uа=1.2kV, Uс2=1kV, Uс1= -500V): no more than 0.7mA
- Current of the 2nd grid in a pulse: is no more than 5A
- Current of the 2nd grid (at Uа=1.2kV, Un=27V, Uс2= 1kV, Iа=50mA): no more than 8mA
- The current of the 1st grid per pulse: is no more than 4A
- Current of the 1st grid: no more than 0.5mA
- Current of the 1st grid is reverse (at Uа=1.2kV, Un=27V, Uс2=1kV, Iа=50mA): 20 ± 20μA
- Anode load resistance: 1100Ohm
Limiting performance:
- Filament voltage: 22.5 – 27.5V
- Anode voltage: 20kV
- Anode voltage: 20kV
- 2nd grid voltage: 1.25kV
- 1st grid voltage: -1000V
- Voltage of the 1st grid in a pulse: 300V
- Anode current per pulse: 15A
- Power dissipated by anode: 65W
- Power dissipated by 2nd grid: 8W
- Power dissipated by 1st grid: 3W
- Pulse duration: 2.5 µs
- The maximum temperature of the cylinder: 200°C
- Ambient operating temperature range from: -60 to + 70°C
Operating time not less than 1500 hours.
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