GI15B
(GI150)
MICROWAVE TRIODE
The GI15B (GI150) microwave triode is used as an oscillator and an amplifier in continuouswave or pulsed mode with anode modulation in the centimetric and decimetric wavelength ranges.
The triode is available in two variants differing in the type of cooling: the GI15B with a heat sink for forced air cooling and the GI150 with no heat sink for other systems of cooling.
GENERAL
Cathode: indirectly heated, oxidecoated.
Envelope: metalceramic.
Cooling: forced air.
Height: at most 88.5 mm with heat sink, 78.8 mm with no heat sink.
Diameter: at most 45 mm with heat sink, 26.3 mm with no heat sink.
Mass: at most 120 g with heat sink, 60 g with no heat sink.
KP  cathode and heater; P  heater; C  grid; A  anode
OPERATING ENVIRONMENTAL CONDITIONS  
Vibration loads:  
frequencies, Hz  52,000 
acceleration, m/s²  98 
Multiple impacts with acceleration, m/s²  735 
Single impacts with acceleration, m/s²  1,470 
Linear loads with acceleration, m/s²  490 
Ambient temperature, °C  60 to +100 
Relative humidity at up to +40 °C, %  98 
BASIC DATA Electrical Parameters 

Heater voltage, V  12.6 
Heater current, A  0.750.88 
Mutual conductance (at anode voltage 400 V, grid voltage change ±0.5 V, anode current 15mA), mA/V  812 
Penetration factor (at anode voltage 400 V, anode voltage change 400 V, anode current 15 mA), %  0.71.5 
Operating point (negative grid voltage at anode voltage 400 V, anode current 15 mA), V  42 
Interelectrode capacitance, pF:  
input  9.511.5 
output, at most  0.04 
transfer  23 
Warm up time, s, at most  60 
Output power, W:  
in CW operation, at least  3 
in pulsed operation, at least  100 
Output power over 200 h of service, W  2.4 
Limit Operating Values  
Heater voltage, V  1213.4 
Anode voltage, kV:  
DC in pulsed operation (with pulse duration at most 5 µs)  4 
DC with cold cathode  1 
DC  0.8 
Grid voltage, V:  
instantaneous value (with pulse duration below 1 µs)  150 to +100 
instantaneous value (with pulse duration at most 5 µs)  150 to +80 
Cathode current, A:  
r.m.s. value  0.15 
in pulsed operation (with pulse duration at most 5 µs)  3.5 
Dissipation, W:  
anode:  
with forced cooling  80 
with no forced cooling  20 
grid  2 
Wavelength (in pulsed operation), cm  7 
Cathode heating time, s, at least  45 
Temperature, °C:  
anode,at least  200 
leads of grid and cathode  120 
cathode lead (after operation for not over 10 min)  140 
Resistance in grid circuit, kOm  10 
Averaged AnodeGrid Characteristic Curves:
U_{f}= 12.6V
Averaged Characteristic Curves in Pulsed Operation:
U_{f} = 12.6V; t = 2µs; pulse frequency 500 Hz
_____ anodegrid curves;
   grid curves
Characteristic Curves Showing Output Power versus Peak Anode Current:
U_{f} = 12.6V; t = 2µs; pulse frequency 500 Hz
Averaged Characteristic Curves Showing Oscillator Output Power versus Anode Voltage in ContinuousWave Operation:
U_{f} = 12.6V