GI41
TRIODE
The GI41 triode generates and amplifies RF oscillations with a peak output power of up to 1.5 kW with anode modulation, at frequencies up to 3,000 MHz.
GENERAL
Cathode: indirectly heated, oxidecoated.
Envelope: metalceramic.
Height: at most 45 mm.
Diameter: at most 25.8 mm.
Mass: at most 36 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 impacts:  
acceleration, m/s²  4,900 
impact duration, ms  10 
Ambient temperature, °C  60 to +125 
Relative humidity at +35 °C, %  98 
BASIC DATA Electrical Parameters 

Heater voltage (AC or DC), V  6.3 
Heater current, A  1.21.4 
Mutual conductance (at anode voltage 450 V, peak anode current 50 mA), mA/V, at least  23 
Inverse grid current, µA, at most  1.5 
Peak power output (at peak anode voltage 2.5 A, pulse duration 1.5 µs, 1 /duty factor 200, wavelength 10 cm), kW, at least  1.5 
Interelectrode capacitance, pF:  
input  5.57.5 
output, at most  0.05 
transfer  2.53 
Limit Operating Values  
Heater voltage (AC or DC), V:  
maximum  6.6 
minimum  6 
Peak anode voltage, kV  3 
Grid voltage, V:  
maximum  0 
minimum  250 
Dissipation, W:  
anode  40 
grid  0.8 
Maximum drive power, W  350 
Peak anode current, A  2.6 
Peak grid current, A  1.25 
Envelope temperature, °C  200 
Warm up time, s  60 
Operating frequency, MHz  3,000 
Maximum pulse duration, µs  1.5 
Minimum 1/duty factor  200 
Standard Operating Conditions (Anode Keying) 

Selfexcited oscillator  Amplifer  
Heater voltage, V  6.3  6.3 
Peak anode voltage, kV  2.8  2.8 
Peak anode current, A  2.5  2.5 
Pulse duration, µs  1.5  1.5 
1/duty factor  200  200 
Peak output power, W  1,500  1,500 
Peak drive power, W  —  350 
Frequency, MHz  3,000  3,000 
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;
_____ anodegrid;
_ _ _ grid
Averaged Characteristic Curves Showing Oscillator Output Power:
U_{f} = 6.3V; U_{a imp} = 2.8kV; T = 500;
_____ peak oscillator power (P_{imp});
_ _ _ gain coefficient (R_{a})
Averaged Characteristic Curves in Amplification Mode:
U_{f} = 6.3V; U_{a imp} = 2.8kV; t = 1µs; Q = 500;
_____ peak oscillator power (P_{imp});
_ _ _ efficiency (n)
Averaged Dynamic Characteristic Curves:
U_{f} = 6.3V; t =1.5 µs; T = 200