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GS-ÇA

BEAM-POWER TETRODE

The GS-ÇA beam-power tetrode amplifies RF power.

GENERAL
Cathode: indirectly heated, oxide-coated.
Envelope: metal-ceramic.
Cooling: forced water.
Height: at most 128 mm.
Diameter: at most 91 mm.
Mass: at most 800 g.

gs-3a(1)1.jpg

OPERATING ENVIRONMENTAL CONDITIONS
Vibration loads:
frequency, Hz 1-200
acceleration, m/s² 59
Multiple impacts:
acceleration, m/s² 392
impact duration, ms 10
Ambient temperature, °C - 60 to +70
Relative humidity at +35 °C,% 98

BASIC DATA
Electrical Parameters
Heater voltage (AC or DC). V 26
Heater current, A 3.1-3.8
Mutual conductance (at anode voltage 1500 V, grid 2 voltage 600 V, grid 1 voltage change - 10 V and anode current 1.5 A), mA/V 30-50
Gain coefficient (grid i -gna 2) (at anode voltage 2,000 V, grid 2 voltage 500 V, grid 2 voltage change 50 V and anode current 1 A) 8-13
Output power (at anode voltage 2,500 V, grid 2 voltage 500 V. anode current 2 A, driving power 250 V, wavelength 50 cm), kW, at least 2.2
Interelectrode capacitance, pF:
input 26-34
output, at most 0.07
transfer 17-23

Limit Operating Values
Heater voltage (AC or DC), V 23.4-27.3
Heater starting current, A 5.6
Anode voltage (DC), kV 2.7
Grid 2 voltage, V 700
Driving power, W 300
Dissipation, W:
anode 3x103
grid 1 30
grid 2 60
Anode current (DC component), A 2.6
Warm up time, s 120
Operating frequency, MHz 300-800
Anode temperature, °C 110
Temperature of cathode and grids, °C 150

gs-3a(3)1.jpg
Averaged Anode Characteristic Curves:
Uf = 26V; Ug2 = 600V

gs-3a(3)2.jpg
Averaged Anode-Grid Characteristic Curves:
Uf = 26V; Ua = 2.5kV