GI-39B

TRIODE

The GI-39B triode generates and amplifies RF oscillations in pulsed operation with anode modulation.

GENERAL
Cathode: indirectly heated, oxide-coated.
Envelope: metal-ceramic with ring leads of cathode, heater and grid.
Cooling: forced air.
Height: at most 147 mm.
Diameter: at most 100.2 mm.
Mass: at most 1.2 kg.

OPERATING ENVIRONMENTAL CONDITIONS
Vibration loads:
frequencies, Hz	2-2,000
acceleration, m/s²	4.9-98
Multiple impacts with acceleration, m/s²	343
Linear loads with acceleration, m/s²	294
Ambient temperature, °C	-60 to+150
Relative humidity at up to +40 °C, %	95-98

BASIC DATA Electrical Parameters
Heater voltage (AC or DC), V	12.6
Heater current, A	3.4-3.9
Anode voltage (DC), kV	2
Mutual conductance, mA/V	27-36
Penetration factor (at anode voltage change 0.2 kV, anode current 0.25 A), %	0.6-1
Warm up time, s, at most	90
Oscillatory power in pulse generation mode (at peak anode voltage 20 kV, peak anode current 16 A, wavelength about 30 cm, 1/duty factor 500, pulse duration 2-5 µs), kW, at least	128
Interelectrode capacitance, pF:
input	21-25
transfer	4.2-6.3

Limit Operating Values
Heater voltage (AC or DC), V	13.2-12
Peak anode voltage, kV	20
Negative peak grid 1 voltage, kV	1
Dissipation, W:
anode (average value)	440
grid	5
Peak anode current, A	16
Peak grid current, A	7
Minimum wavelength, cm	25
Minimum 1/duty factor	500
Pulse duration, µs:
maximum	10
minimum	1
Temperature, °C:
anode lead	200
cathode lead	150
grid lead	180
anode insulator	250

Standard Operating Conditions
Heater voltage, V	12.6
Peak anode voltage, kV	20
Peak anode current, A	16
Wavelength, cm	30
Peak oscillatory power, kW	128
Pulse duration, µs	2-4
1/duty factor	500

Averaged Peak Characteristic Curves:
U_f = 12.6V; t = 2µs; frequency 1,000 imp/s;
_____ anode;
_ _ _ grid-anode

Averaged Peak Characteristic Curves Showing Oscillator Output Power versus Anode Current:
U_f = 12.6V; U_{a imp} = 20kV; t = 2 µs; frequency 1,000 imp/s

Averaged Peak Characteristic Curves:
U_f = 12.6V; t = 2µs; frequency 1,000 imp/s;
_____ anode-grid;
_ _ _ grid

Characteristic Curves Showing Flow Rate of Envelope Cooling Air versus Anode Dissipation:
_____ at 100°C;
_ _ _ at 160°C