GMI-34A

TRIODE

The GMI-34A triode is used as a pulse power switch in RF equipment

GENERAL
Cathode: indirectly heated, oxide-coated.
Envelope: metal-ceramic with protective screen.
Cooling: water.
Height: at most 290 mm.
Diameter: at most 196 mm.
Mass: at most 12 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	14.6-16.8
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	3
grid	80
Maximum pulse duration, µs	50
Minimum warm up time, s	300

Averaged Cut-Off Characteristic Curves:
U_f = 26V; I_a = 1mA;
————— cutoff voltage (U_g cutoff);
_ _ _ bias voltage U_gb

Averaged Peak Characteristic Curves:
U_f = 26V;
_____ anode;
_ _ _ grid2-anode