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GI-41

TRIODE

The GI-41 triode generates and amplifies RF oscillations with a peak output power of up to 1.5 kW with anode modulation, at frequencies up to 3,000 MHz.

GENERAL
Cathode: indirectly heated, oxide-coated.
Envelope: metal-ceramic.
Height: at most 45 mm.
Diameter: at most 25.8 mm.
Mass: at most 36 g.

gi-41(1)00091.jpg

OPERATING ENVIRONMENTAL CONDITIONS
Vibration loads:
frequencies, Hz 1-1,000
acceleration, m/s² 98
Multiple impacts:
acceleration, m/s² 1,470
impact duration, ms 10
Single impacts:
acceleration, m/s² 4,900
impact duration, ms 10
Ambient temperature, °C -60 to +125
Relative humidity at +35 °C, % 98

BASIC DATA
Electrical Parameters
Heater voltage (AC or DC), V 6.3
Heater current, A 1.2-1.4
Mutual conductance (at anode voltage 450 V, peak anode current 50 mA), mA/V, at least 23
Inverse grid current, µA, at most 1.5
Peak power output (at peak anode voltage 2.5 A, pulse duration 1.5 µs, 1 /duty factor 200, wavelength 10 cm), kW, at least 1.5
Interelectrode capacitance, pF:
input 5.5-7.5
output, at most 0.05
transfer 2.5-3

Limit Operating Values
Heater voltage (AC or DC), V:
maximum 6.6
minimum 6
Peak anode voltage, kV 3
Grid voltage, V:
maximum 0
minimum -250
Dissipation, W:
anode 40
grid 0.8
Maximum drive power, W 350
Peak anode current, A 2.6
Peak grid current, A 1.25
Envelope temperature, °C 200
Warm up time, s 60
Operating frequency, MHz 3,000
Maximum pulse duration, µs 1.5
Minimum 1/duty factor 200

Standard Operating Conditions
(Anode Keying)
  Self-excited oscillator Amplifer
Heater voltage, V 6.3 6.3
Peak anode voltage, kV 2.8 2.8
Peak anode current, A 2.5 2.5
Pulse duration, µs 1.5 1.5
1/duty factor 200 200
Peak output power, W 1,500 1,500
Peak drive power, W 350
Frequency, MHz 3,000 3,000

gi-41(3)00011.jpg
Averaged Peak Characteristic Curves:
Uf = 6.3V; t = 1µs; pulse frequency 1,000 Hz;
_____ anode;
_ _ _ anode-grid

gi-41(3)00012.jpg
Averaged Peak Characteristic Curves:
Uf = 6.3V; t = 1µs; pulse frequency 1,000 Hz;
_____ anode-grid;
_ _ _ grid

gi-41(3)00013.jpg
Averaged Characteristic Curves Showing Oscillator Output Power:
Uf = 6.3V; Ua imp = 2.8kV; T = 500;
_____ peak oscillator power (Pimp);
_ _ _ gain coefficient (Ra)

gi-41(4)00021.jpg
Averaged Characteristic Curves in Amplification Mode:
Uf = 6.3V; Ua imp = 2.8kV; t = 1µs; Q = 500;
_____ peak oscillator power (Pimp);
_ _ _ efficiency (n)

gi-41(4)00022.jpg
Averaged Dynamic Characteristic Curves:
Uf = 6.3V; t =1.5 µs; T = 200