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GMI-47A

TRIODE

The GMI-47A triode is used for pulse power switching in pulse modulators in RF equipment

GENERAL
Cathode: indirectly heated.
Cooling: forced liquid (distilled water).
Working position: upright with anode up.
Height: at most 980 mm.
Mass: at most 45 kg

gmi-47a(1)00091.jpg
gmi-47a(1)00092.jpg
1 - cathode and heater; 2 - heater; 3 - control grid; 4 - anode; 5 - anode of electric-discharge pump; 6 - cathode of electric discharge pump; I - caps removed

BASIC DATA
Electrical Parameters
Heater voltage, V 20.9-23.1
Heater current, A 132-150
Peak anode current, A, at least 850
Peak grid current, A 0.04xIpa-0.13xIpa
Anode voltage, kV 70
Bias voltage, V -100
Control grid excess voltage, kV 6

Limit Operating Values
Pulse duration, µs, at most 100
Pulse 1/duty factor, at least 1,000
Dissipation, kW:
anode 25
control grid 5

gmi-47a(2)00101.jpg
Averaged Static Peak Characteristic Curves:
Ug = 25V;
_____ peak anode current Ia imp;
_ _ _ peak grid current Ig imp

gmi-47a(2)00102.jpg
Characteristic Curve Showing Anode Current versus Heater Voltage:
Ug imp = 6kV; Ua = 10kV; Ug = -100V