STC NavigatoR / Modular Pulse Tubes / Tube gmi-6

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GMI-6

TETRODE

The GMI-6 tetrode is used in pulse modulators in RF equipment

GENERAL
Cathode: indirectly heated, oxide-coated.
Envelope: glass, no-base.
Height: at most 93 mm.
Diameter: at most 48 mm.
Mass: at most 70 g

gmi-6(1)00071.jpg
1, 7 - heater; 2 - grid 1 of second tetrode; 3 - grid 2; 4 - cathode and beam-forming plates; 5 - heater (centre tap); 6 - grid 1 of first tetrode; A1 - anode of first tetrode - top lead; A2 - anode of second tetrode - top lead

OPERATING ENVIRONMENTAL CONDITIONS
Vibration loads:
frequencies, Hz	20-600
acceleration, m/s²	98
Multiple impacts with acceleration, m/s²	343
Single impacts with acceleration, m/s²	1,470
Linear loads with acceleration, m/s²	490
Relative humidity at up to +40 °C, %	98

BASIC DATA
Electrical Parameters

Heater voltage, V 12.6

Heater current, A 1-1.2

Peak anode current, A, at least 8

Peak grid 2 current, A, at most 3

Cutoff voltage, V, at least 125

Interelectrode capacitance, pF:

input 11-18

output 4.2-6.2

transfer, at most 0.2

Warm up time, s, at most 60

Peak anode current over 900 h of service, A, at least 7

Limit Operating Values

Heater voltage, V:

with parallel connection 5.7-7

with series connection 11.4-14

Anode voltage, kV 4

Grid 2 voltage, kV 0.8

Grid 1 voltage, V 200

Peak grid 1 excess voltage, V 150

Voltage between cathode and heater, V -150 to +150

Peak cathode current, A 15

Dissipation, W:

anode 15

grid 2 3

grid 1 1

Pulse duration, µs 5

Envelope temperature, °C 260

gmi-6(2)00081.jpg
Characteristic Curves Showing Cutoff Voltage versus Anode and Grid 2 Voltages: U_f = 12.6V; I_a = 0.2mA

gmi-6(2)00082.jpg
Averaged Peak Grid 1-Anode Characteristic Curves: U_f = 12.6V; U_g2 = 500V

gmi-6(2)00083.jpg
Averaged Peak Grid 1-Anode Characteristic Curves: U_f = 12.6V; U_g2 = 600V

gmi-6(3)00091.jpg
Averaged Peak Grid 1-Anode Characteristic Curves: U_f = 12.6V; U_g2 = 700V

gmi-6(3)00092.jpg
Averaged Peak Grid 1-Anode Characteristic Curves: U_f = 12.6V; U_g2 = 800V

gmi-6(3)00093.jpg
Averaged Peak Characteristic Curves: U_f = 12.6 V; U_g2 = 500V;
_____ anode;
_ _ _ grid 2-anode

gmi-6(3)00094.jpg
Averaged Peak Characteristic Curves:
U_f = 12.6 V; U_g2 = 600V;
_____ anode;
_ _ _ grid 2-anode

gmi-6(3)00095.jpg
Averaged Peak Characteristic Curves: U_f = 12.6 V; U_g2 = 700V;
_____ anode;
_ _ _ grid 2-anode

gmi-6(3)00096.jpg
Averaged Peak Characteristic Curves:
U_f = 12.6 V; U_g2 = 800V;
_____ anode;
_ _ _ grid 2-anode

BASIC DATA Electrical Parameters
Heater voltage, V	12.6
Heater current, A	1-1.2
Peak anode current, A, at least	8
Peak grid 2 current, A, at most	3
Cutoff voltage, V, at least	125
Interelectrode capacitance, pF:
input	11-18
output	4.2-6.2
transfer, at most	0.2
Warm up time, s, at most	60
Peak anode current over 900 h of service, A, at least	7

Limit Operating Values
Heater voltage, V:
with parallel connection	5.7-7
with series connection	11.4-14
Anode voltage, kV	4
Grid 2 voltage, kV	0.8
Grid 1 voltage, V	200
Peak grid 1 excess voltage, V	150
Voltage between cathode and heater, V	-150 to +150
Peak cathode current, A	15
Dissipation, W:
anode	15
grid 2	3
grid 1	1
Pulse duration, µs	5
Envelope temperature, °C	260