GMI-2B

Description

The GMI-2B pulsed modulator tetrode in glass design with indirectly heated oxide cathode and forced air cooling. Designed to work as a modulator in circuits with a partial discharge of a storage capacity at an anode voltage in a pulse of not more than 36kV and a current in a pulse of up to 110A. The GMI-2B pulsed modulator tetrode is used in general-purpose stationary radio equipment.
Available in glass design with 6 electrode leads and a separate anode lead.
Works in a vertical position, pins down.
Forced air cooling 200 m³/h.

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

Technical specifications:

• Heater voltage (AC or DC): 25V
• Heater current: 15.8 – 19.2A
• Anode voltage (DC): 32kV
• Grid 2 voltage (DC): 2kV
• Grid 1 voltage (DC): 600V
• Peak grid 1 excess voltage: 200V
• Peak anode current, at least: 90A
• Anode current (average value), at least: 140mA
• Grid 1 current (average value), at least.: 1mA
• Grid 2 current (average value), at least: 30mA
• Negative cutoff voltage (at anode current 1mA), at most: 570V
• Anode load resistance: 300Ohm
• Reservoir capacitor in anode circuit: 0.05pF
• Pulse duration: 0.65 – 1.1pF
• Pulse 1/duty factor: 570 – 615pF
• Interelectrode capacitance input, at most: 350pF
• Interelectrode capacitance output, at most: 125pF
• Interelectrode capacitance transfer, at most: 10pF

Limit Operating Values

• Heater voltage (AC or DC): 23.7 – 26.3V
• Minimum grid 1 voltage (DC): -600V
  Dissipation:
• anode: 900W
• 2 grid: 80W
• 1 grid: 12W
• Peak anode current: 110A
• Pulse duration: 0.3 – 2µs
• Temperature of anode face: 120°C

Operating time not less than 400 hours.