GI6B
MICROWAVE TRIODE
The GI6B microwave triode is used in oscillator circuits with no external feedback, providing continuouswave or pulsed operation with anode modulation in the decimetric wavelength range.
GENERAL
Cathode: indirectly heated, oxidecoated.
Envelope: metalceramic.
Cooling: forced air.
Height: at most 110.5 mm.
Diameter: at most 65 mm.
Mass: at most 330 g.
OPERATING ENVIRONMENTAL CONDITIONS  
Vibration loads:  
frequencies, Hz  5600 
acceleration, m/s²  59 
Multiple impacts with acceleration, m/s²  343 
Ambient temperature, °C  60 to 4 100 
Relative humidity at up to +40 °C, %  98 
BASIC DATA Electrical Parameters 

Heater voltage, V  12.6 
Heater current, A  1.82.05 
Mutual conductance (at anode voltage 1.3 kV, grid voltage change 1 V, anode current 150 rnA), mA/V  1826 
Penetration factor (at anode voltage 1.3 kV, anode voltage change 200 V, anode current 150 mA), %  12 
Interelectrode capacitance, pF:  
input  1012.7 
output  0.20.3 
transfer  45.2 
Warm up time, s, at most  90 
Output power, W:  
in CW operation at anode voltage 1.35 kV, anode current 250 mA, wavelength 52 cm. at least 
130 
over 350 h of service, at least  104 
Limit Operating Values  
Heater voltage, V:  
upper limit  13 
lower limit  12.3 
Anode voltage, kV:  
DC in CW operation  2.5 
DC with cold cathode  3 
instantaneous value in CW operation  5 
peak value in pulsed operation (at pulse duration at most 10 µs)  9 
Grid voltage, V:  
instantaneous value in CW operation  300 to +80 
peak value in pulsed operation (at pulse duration 10 µs  900 to +600 
Cathode current: r.m.s. value, mA 
600 
DC component under conditions of class Â without modulation, mA  400 
instantaneous value under conditions of class Â without modulation, A  1.25 
Dissipation, W:  
anode  350 
grid:  
with thermocurrent 5 mA  2.5 
neglecting thermocurrent  7 
Wavelength, cm:  
in pulsed operation, lower limit  18 
in CW operation, lower limit  22 
Temperature, °C:  
anode heat sink  160 
grid lead  200 
cathode lead  100 
envelope  250 
Resistance in grid circuit, kOm  10 
Averaged PulseOperation Characteristic Curves:
U_{f} = 12.6V; U_{g} = 200 V; T_{imp} = 1 µs; frequency 1,000 imp/s;
_____ anode;
   gridanode
Averaged PulseOperation Characteristic Curves:
U_{f} = 12.6V; U_{g} = 200 V; T_{imp} = 1 µs; frequency 1,000 imp/s;
_____ anode;
   gridanode
Averaged Characteristic Curves Showing Oscillator Output Power versus Anode Voltage in ContinuousWave Generation:
U_{f} = 12.6V; L = 25cm;
   (P_{a max})
Averaged Anode Characteristic Curves
Averaged Characteristic Curves Showing Oscillator Output Power versus Anode Voltage in ContinuousWave Generation:
U_{f} = 12.6V; L = 50cm;
   (P_{a max})
Averaged AnodeGrid Characteristic Curves