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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 Ā 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:
U_f = 12.6V

gs-9b(4)2.jpg
Averaged Characteristic Curves:
_____ anode;
— — — P_{a max}

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 Ā 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