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GS-3B

BEAM-POWER TETRODE

The GS-3B beam-power tetrode amplifies RF power.

GENERAL
Cathode: indirectly heated, oxide-coated.
Envelope: metal-ceramic.
Cooling: forced water.
Height: at most 165 mm.
Diameter: at most 121 mm.
Mass: at most 3.5 kg.

gs-3b(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 3.2-3.8
Mutual conductance (at anode voltage 1,500 V, grid 2 voltage 600 V, grid 1 voltage change -10V and anode current 1.5 A), mA/V 30-50
Gain coefficient (grid 1 -grid 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 600 V, anode current 2 A, driving power 250 V, wavelength 50 cm), kW, at least 1.5
Interelectrode capacitance, pF:
input 25-35
output, at most 0.07
transfer 15-21

Limit Operating Values
Heater voltage (AC or DC), V 23-26
Maximum anode voltage (DC), kV 2.1
Maximum grid 2 voltage, V 500
Maximum driving power, W 300
Maximum dissipation, W:
anode 2x103
grid 1 45
grid 2 60
Maximum anode current, A 1.6
Operating frequency, MHz:
maximum 800
minimum 300
Maximum warm up time, s 120
Maximum anode temperature, °C 180
Maximum temperature, °C:
cathode lead 90
grids lead 120

gs-3b(3)1.jpg
Averaged Anode Characteristic Curves:
Uf = 26V; Ug2 - 500V

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