GMI-38

Pulse modulator triode GMI-38 in a metal-glass design with a protective grid, an oxide cathode of indirect heating and forced air cooling. It is intended for switching pulse power in pulse modulators with an anode voltage in a pulse of up to 20 kV and a current in a pulse of more than 24 A. It operates in a vertical position, with the terminals down. Forced air cooling.

• Stamp of technical control department of the manufacturer ” ОТК “

Technical specifications (at Un=26 V, Uа=2.5 kV, Uс= 200 V, Uс imp=1 kV):

• Anode current in pulse:
  – at Uн=26 V not less than: 20 A
  – at Uн=24.2 V not less than: 17.5 A
• Grid current in pulse not more than: 3 A
• Grid blocking voltage negative (at Uа=23 kV, Iа=0.2 mA) not more than: 200 V
• Readiness time not more than: 3 min
• Interelectrode capacitances:
  – input not more than: 120 pF
  – output not more than: 20 pF
  – pass-through not more than: 1.2 pF

Limit Operating Values

• Heating voltage: 24.2 – 27.8 V
• Anode voltage: 20 kV
• Grid voltage negative (absolute value) 300 V Grid voltage in pulse: 1.2kV
• Power dissipated by the anode: 60 W
• Power dissipated by the grid: 25 W
• Cathode current in pulse:
  – at duty cycle 500: 17 A
  – at duty cycle 1000: 24 A
• Anode current: 600 mA
• Pulse duration (at Ik < 24 A): 50 μs
• Shell temperature: 175 °C
• Range of operating ambient temperatures from -60 to +70 °C

Operating time not less than 1000 hours.