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GS-9B
(GS-90B)

MICROWAVE TRIODE

The GS-9B (GS-90B) microwave triode is used for RF voltage generation in external-feedback oscillators designed for continuous operation in the decimetric wavelength range.

The triode is available in two variants of cooling: with a heat sink, suitable for forced air cooling (GS-9B), and without a heat sink, for other types of cooling (GS-90B).

GENERAL
Cathode: indirectly heated, oxide-coated.
Envelope: metal-ceramic.
Cooling: forced air.
Height:

at most 110.5 mm with a heat sink,
at most 97 mm with no heat sink.
Diameter:
at most 65 mm with a heat sink,
at most 36.3 mm with no heat sink.
Mass:
at most 330 g with a heat sink,
at most 170 g with no heat sink.

gs-9b(2)1.jpg

OPERATING ENVIRONMENTAL CONDITIONS
Vibration loads:
frequency, Hz 5-600
acceleration, m/s² 59
Multiple Impacts with acceleration, m/s² 343
Single impacts with acceleration, m/s² 1,470
Linear loads with acceleration, m/s² 490
Ambient temperature, °C -60 to +100
Relative humidity at up to + 40 °C% 98

BASIC DATA
Electrical Parameters
Heater voltage, V 12.6
Heater current, A 1-1.2
Mutual conductance (at anode voltage 1.3 kV and anode current 120 mA), mA/V 15-24
Penetration factor (at anode voltage 1.3 kV, anode voltage change +200 V, anode current 120mA), % 0.6-1.2
Interelectrode capacitance, pF:
input 7.2-9.6
output, at most 0.04
transfer 2.8-3.5
Warm up time, s, at most 90
Output power (continuous operation at anode voltage 1.5 kV, anode current 175 mA, wavelength 18cm), W, at least 40
Output power over 200 h of service,
W, at least
32

Limit Operating Values
Heater voltage, V 11.7-13
Anode voltage, kV:
DC voltage in continuous operation 2.5
DC voltage at cold cathode 3
instantaneous value in continuous
operation
5
Grid voltage (instantaneous value), V -200 to +50
Cathode current, mA:
r.m.s.value 330
DC component at frequency doubling 190
instantaneous value under class conditions 700
Dissipation, W:
anode 300
grid, neglecting the grid thermal current 5
grid with grid thermal current at most 5 mA 2.2
Temperature, °C:
anode heat sink 130
grid lead 200
cathode lead 100
external ceramic parts 250
Resistance in the grid circuit, kOm 10

gs-9b(3)1.jpg
Averaged Anode-Grid Characteristic Curves

gs-9b(4)1.jpg
Averaged Anode-Grid Characteristic Curves:
Uf = 12.6V

gs-9b(4)2.jpg
Averaged Characteristic Curves:
_____ anode;
Pa max