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GMI-34B

TRIODE

The GMI-34B triode is used for pulse power switching in RF equipment

gmi-34b(1)00081.jpg

GENERAL
Cathode: indirectly heated, oxide-coated.
Envelope: metal-ceramic with protective screen.
Cooling: air
Height: at most 230 mm.
Diameter: at most 182 mm.
Mass: at most 10 kg

OPERATING ENVIRONMENTAL CONDITIONS
Vibration loads:
frequencies, Hz 5-200
acceleration, m/s² 39
Multiple impacts with acceleration, m/s² 343
Single impacts with acceleration, m/s² 1,470
Ambient temperature, °C -60 to+100
Relative humidity at +40 °C, % 98

BASIC DATA
Electrical Parameters
Heater voltage (AC or DC), V 26
Heater current, A 14.6-17.8
Anode voltage (DC), kV 6
Negative grid voltage, V 250
Peak (excess) grid voltage, kV 1.3
Peak anode current, A, at least 120
Peak grid current, A, at most 0.1
Negative cutoff voltage, absolute value, V, at most 180
Warm up time, s, at most 300
Interelectrode capacitance, pF:
input 450
output 40
transfer 10

Limit Operating Values
Heater voltage (AC or DC), V 24.7-27.3
Anode voltage, kV 40
Negative peak grid voltage, absolute value, V 250-300
Peak grid voltage, kV 1.9
Peak cathode current, A:
at 1/duty factor at least 500 150
at 1/duty factor at least 1,000 200
Anode current, A 250
Dissipation, W:
anode 3x10³
grid 80
Maximum pulse duration, µs 50
Minimum warm up time, s 300

gmi-34b(3)00101.jpg
Averaged Cut-Off Characteristic Curves:
Uf = 26V; Ia = 1mA;
_____ cutoff voltage (Ug cutoff);
_ _ _ bias voltage Ugb

gmi-34b(3)00102.jpg
Averaged Peak Characteristic Curves:
Uf = 26V;
_____ anode;
_ _ _ grid 2-anode