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GI-46B
OPERATING ENVIRONMENTAL CONDITIONS
Vibration loads:
frequencies, Hz
5-1,000
acceleration, m/s²
98
Multiple impacts:
acceleration, m/s²
1,470
number of impacts
4,000
Ambient temperature, °C
-60 to +100
Relative humidity at +40 °C, %
95-98
BASIC DATA
Electrical Parameters
Heater voltage (AC or DC), V
12.6
Heater current, A
2.3-2.6
Anode voltage (DC), kV
2
Mutual conductance (at anode current 80 mA), m A /V
17-26
Inverse grid current (at anode current 80 mA ), µA
40
Cathode emission current (at anode pulse vol tage 400 V, pulse duration 2-5 µs, frequency 50
Hz, grid pulse voltage 400 V), A, at least
Penetration factor (at anode current 80 mA , anode voltage change 200 V), %
0.4-0.8
Output power in CW generation mode (at heater vol tage 8.5 V, anode voltage 1.5 kV, anode
current 350 mA, wavelength 29 cm), W, at least
Warm up time, s, at most
100
Interelectrode capacitance, pF:
input
14.5-
TRIODE
The GI-46B triode generates and amplifies RF oscillations in continuouswave and pulsed operation with anode modulation.
GENERAL
Cathode: indirectly heated, oxide-coated.
Envelope: metal-caramic with ring leads of cathode, heater and grid.
Cooling: forced air.
Height: at most 113 mm with heat sink, 69 mm with no heat sink.
Diameter: at most 65 mm with heat sink, 55 mm with no heat sink.
Mass: at most 620 g with heat sink, 205 g with no heat sink.
24
120
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18.5
transfer
5.1-6.4
Limit Operating Values
Heater voltage (AC or DC), V:
maximum
13.9
minimum
7.7
Anode voltage (DC), kV
1.9
Peak anode voltage, kV
15
Dissipation, W:
anode
350
grid
20
Anode current (DC component), mA
350
Peak anode current, A
15
Maximum 1/duty factor
500
Maximum pulse duration, µs
15
Maximum resistance in grid circuit, kH
10
Temperature, °C:
anode lead
200
grid lead
200
cathode lead
120
STANDARD OPERATING CONDITIONS
CW Operation
Heater voltage, V
7.65-9.35
Anode voltage, kV
1.5
Anode current, mA
350
Wavelength, cm
28
Output power, W:
in self-excited oscillator mode
120
in amplifier mode
150
Pulsed Operation
Heater voltage, V
12.6
Peak anode voltage, kV
10
Peak anode current, A
12
Pulse duration, µs
10
Peak output power, kW
30
1/duty factor
1,000
Wavelength, cm
28
Air flow rate for envelope cooling, m³/h
24
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