STC NavigatoR / Transmitting Pulse Tubes / Tube gi-27am

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GI-27AM

TRIODE

The GI-27AM triode is used in self-excited oscillator and power amplifier circuits with pulsed anode modulation in RF equipment.

GENERAL
Cathode: directly heated.
Envelope: metal-ceramic.
Cooling: forced (water for anode, air for other elements of envelope).
Height: at most 345 mm.
Diameter: at most 171 mm.
Mass: at most 11 kg.

gi-27am(1)00101.jpg
gi-27am(1)00102.jpg
K1, K2 - cathode; C - grid; A - anode

OPERATING ENVIRONMENTAL CONDITIONS

Multiple impacts with acceleration, m/s² 147

Ambient temperature, °C 1-55

Relative humidity at up to +25 °C without moisture condensation, % 80

BASIC DATA
Electrical Parameters

Filament voltage, V 13

Filament current, A 470-550

Negative cutoff voltage (at anode voltage 10 kV, anode current 0.1 A), absolute value, V, at most 385

Peak cathode emission current (at peak anode and grid voltages 3 kV, with interconnected anode and grid), A, at least 500

Gain coefficient (at anode voltages 4 and 5 kV, anode current 4.5 A) 26-46

Peak power output (at peak anode voltage 40 kV, pulse duration 300µs, at up to 150 MHz), MW, at least 5

Mutual conductance (at anode voltage 5 kV, anode currents 2.5 and 4.5 A), mA/V 75-110

Interelectrode capacitance, pF:

input, at most 200

output, at most 50

transfer, at most 4

Limit Operating Values

Filament voltage, V 13.5

Peak anode voltage (DC), kV 40

Negative grid voltage, absolute value, V 4,800

Anode dissipation, kW 25

Filament starting current (peak value), A 1,100

Grid dissipation, W 250

Pulse duration, µs 500

Operating frequency, MHz, at most 200

Temperature at the hottest point of envelope, °C 175

gi-27am(2)00011.jpg
Averaged Characteristic Curves:
U_f = 13V;
_____ anode-grid;
_ _ _ grid

OPERATING ENVIRONMENTAL CONDITIONS
Multiple impacts with acceleration, m/s²	147
Ambient temperature, °C	1-55
Relative humidity at up to +25 °C without moisture condensation, %	80

BASIC DATA Electrical Parameters
Filament voltage, V	13
Filament current, A	470-550
Negative cutoff voltage (at anode voltage 10 kV, anode current 0.1 A), absolute value, V, at most	385
Peak cathode emission current (at peak anode and grid voltages 3 kV, with interconnected anode and grid), A, at least	500

Gain coefficient (at anode voltages 4 and 5 kV, anode current 4.5 A)	26-46
Peak power output (at peak anode voltage 40 kV, pulse duration 300µs, at up to 150 MHz), MW, at least	5
Mutual conductance (at anode voltage 5 kV, anode currents 2.5 and 4.5 A), mA/V	75-110
Interelectrode capacitance, pF:
input, at most	200
output, at most	50
transfer, at most	4

Limit Operating Values
Filament voltage, V	13.5
Peak anode voltage (DC), kV	40
Negative grid voltage, absolute value, V	4,800
Anode dissipation, kW	25
Filament starting current (peak value), A	1,100
Grid dissipation, W	250
Pulse duration, µs	500
Operating frequency, MHz, at most	200
Temperature at the hottest point of envelope, °C	175