لامپ روسی ГУ-81М

Main technical parameters of ГУ-81М:
at Un=12.6 V, Ua=2 kV, Uc2=0.6 kV, Ia=200 mA

• Filament current no more than …..10.5 A
• The current of the 1st grid is reversed (at Un=13.6 V, Ua=3 kV)no more than,….. 50 µA
• Permeability of the 1st grid relative to the 2nd grid (at Uс2=0.5 and 0.6 kV)….. 31.5±4.5%
• The steepness of the characteristic (when changing Us by 10 V)…..5.5 ± 1mA/V
• Oscillatory power:
  – at a frequency of 50 MHz at Uc1=200 V, Ia=600 mA, Ic2=200 mA …..at least 400 W
  – at a frequency of 12 MHz at Ua=1.5 kV, Ia=500 mA …..not less than 750 W
• Interelectrode capacitances, pF:
  – grids – cathode…..28.5 ± 3.5
  – anode – cathode…..23.5 ± 2.5

Limiting operational characteristics of ГУ-81М:

• Heating voltage…..11.8 – 13.5 V
• Anode voltage
  – at a frequency of 6 MHz…..3 kV
  – at a frequency of 24 MHz…..2.5 kV
  – at a frequency of 50 MHz…..1.5 kV
• Anode voltage at anode modulation, peak value…..5 kV
• 2nd Grid Voltage…..0.6 kV
• The voltage of the 2nd grid in an impulse….. 1.2 kV
• The power dissipated by the anode for a long time…..450 W
• The power dissipated by the anode for 3 min…..600 W
• The power dissipated by the 2nd grid…..120 W
• The power dissipated by 1st grid…..10 W
• Tank temperature…..350 C
• Ambient operating temperature range….. from -60 to +70 С

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