GI411
TRIODE
The GI411 triode generates and amplifies oscillations at frequencies up to 3,000 MHz in highduty factor pulsed operation in groundedgrid circuits.
GENERAL
Cathode: indirectly heated, oxidecoated dispenser.
Envelope: titaniumceramic.
Height: at most 45 mm.
Diameter: at most 25.8 mm.
Mass: at most 30 g.
OPERATING ENVIRONMENTAL CONDITIONS  
Vibration loads:  
frequencies, Hz  11,000 
acceleration, m/s²  98 
Multiple impacts:  
acceleration, m/s²  1,470 
impact duration, ms  10 
Single impact:  
acceleration, m/s²  4,900 
impact duration, ms  10 
Ambient temperature, °C  65 to +125 
Relative humidity at +40 °C, %  9598 
BASIC DATA Electrical Parameters 

Heater voltage (AC or DC), V  6.3 
Heater current, A  1.21.5 
Mutual conductance, mA/V, at least  23 
Gain coefficient (at anode voltage 450 V and anode current 50 mA)  60140 
Warm up time (at peak anode voltage 3.2 kV, peak anode current 2.8 A, 1/duty factor 200, pulse duration 1.5 µs, wavelength 10cm), s, at most  60 
Output power (at peak anode voltage 3.2 kV, peak anode current 2.8 A, 1 /duty factor 200, pulse duration 1.5 µs, wavelength 10 cm), kW, at least  1.8 
Interelectrode capacitance, pF:  
input  68 
output  0.05 
transfer  2.352.65 
Limit Operating Values  
Heater voltage (AC or DC), V  66.6 
Peak anode voltage, kV  3.2 
Anode voltage (DC), kV:  
in cathode keying mode  2.35 
with no anode current  2.4 
Negative bias voltage, V  200 
Dissipation (average value), W:  
anode  40 
grid  0.8 
Peak drive power, W  350 
Minimum output power, kW:  
at wavelength 10 cm  1.8 
at wavelength 18 cm with cathode keying  2 
Peak anode current, A:  
with anode keying  2.9 
with cathode keying  2.7 
Minimum 1/duty factor  200 
Maximum pulse duration, µs  1.5 
Temperature at leads, °C  200 
Averaged Peak Characteristic Curves:
U_{f} = 6.3V; t = 1µs; pulse frequency 1,000 Hz;
_____ anode;
_ _ _ anodegrid
Averaged Peak Characteristic Curves:
U_{f} = 6.3V; t = 1µs; pulse frequency 1,000 Hz;
_____ anode;
   grid
Averaged Dynamic Characteristic Curves at Cathode Modulation:
U_{f} = 6.3V; t = 1.5µs; T = 200; generation frequency 1,600MHz
Averaged Dynamic Characteristic Curves at Anode Modulation:
U_{f} = 6.3V; t = 1.5µs; T = 200; generation frequency 3,000 MHz