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.

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

Averaged Anode Characteristic Curves:
U_f = 26V; U_g2 = 600V

Averaged Anode-Grid Characteristic Curves:
U_f = 26V; U_a = 2.5kV

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