GMI-30

Description

The GMI-30 pulse modulator triode is designed to operate in modulators of high-frequency pulse generators with an anode voltage per pulse of up to 30kV and a current per pulse of more than 15.9A. The GMI-30 pulse modulation triode is used in general purpose radio engineering devices. Available in glass baseless design with 4-pin electrode leads and a separate anode lead.
Works in a vertical position, with the terminals facing down.

Equivalent tube: Eimac 6C21 ~ 1000T Eimac CEJ-49812

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

Technical specifications:

• Filament voltage: 8.2V
• Filament current: 15.9 – 17.7A
• Mutual conductance (at anode voltage 2 kV, anode current 50 mA): 4.8 – 6.8mA/V
• Peak cathode emission current (at peak grid and anode voltages 3 kV, pulse duration 5-10 ps, pulse frequency 50 pulses/s): at least 20A
• Peak grid voltage (at anode voltage 3kV, grid
  voltage -400V, peak anode current 15A, pulse
  duration 5-10 ps, pulse frequency 50 pulses/s): at most: 2kV
• Peak grid current (at anode voltage 3kV, peak grid voltage at most 2kV, peak anode current 15A, pulse duration 5-10 ps, pulse frequency 50 pulses/sec.): at most 5A
• Cathode emission current (at filament voltage 4.8V) over 500h. of service: at most 300mA
• Negative cutoff voltage (at anode voltage 27kV, anode current 0.5mA), absolute value: at most 1200V
• Pulse duration: 5-10 µsec.
• Pulse repetition frequency, pulses/sec. : 50
• Interelectrode capacitance, pF:
  input (grid-cathode): 7 – 12
  output (anode-cathode): at least: 2
  transfer (anode-grid): 4 – 6.6
• Ambient temperature: -10 to +55°С
• Relative humidity at up to +25 °C : 98%

Limiting performance:

• Filament voltage: 7.9 – 8.5V
• Anode voltage: 30kV
• Negative grid voltage, absolute value: 2kV
• Peak anode current: 15A
• Peak grid current: 6A
• Anode dissipation: 300W
• Pulse 1/duty factor: at least 500

Operating time not less than 1000 hours.