GI39B
TRIODE
The GI39B triode generates and amplifies RF oscillations in pulsed operation with anode modulation.
GENERAL
Cathode: indirectly heated, oxidecoated.
Envelope: metalceramic 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  22,000 
acceleration, m/s²  4.998 
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, %  9598 
BASIC DATA Electrical Parameters 

Heater voltage (AC or DC), V  12.6 
Heater current, A  3.43.9 
Anode voltage (DC), kV  2 
Mutual conductance, mA/V  2736 
Penetration factor (at anode voltage change 0.2 kV, anode current 0.25 A), %  0.61 
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 25 µs), kW, at least  128 
Interelectrode capacitance, pF:  
input  2125 
transfer  4.26.3 
Limit Operating Values  
Heater voltage (AC or DC), V  13.212 
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  24 
1/duty factor  500 
Averaged Peak Characteristic Curves:
U_{f} = 12.6V; t = 2µs; frequency 1,000 imp/s;
_____ anode;
_ _ _ gridanode
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;
_____ anodegrid;
_ _ _ grid
Characteristic Curves Showing Flow Rate of Envelope Cooling Air versus Anode Dissipation:
_____ at 100°C;
_ _ _ at 160°C