GI53
TRIODE
The GI53 triode is used as a RF oscillator in groundedgrid circuits.
GENERAL
Cathode: indirectly heated, oxidecoated.
Envelope: metalceramic with disctype leads
of electrodes and a rigid lead of heater.
Height: at most 44 mm.
Diameter: at most 23 mm.
Mass: at most 25 g.
OPERATING ENVIRONMENTAL CONDITIONS  
Vibration loads:  
frequencies, Hz  52,000 
acceleration, m/s²  147 
Multiple impacts with acceleration, m/s²  1,470 
Single impacts with acceleration, m/s²  19,600 
Ambient temperature, °C  60 to +125 
Relative humidity at +40 °C, %  9598 
BASIC DATA Electrical Parameters 

Heater voltage (AC or DC), V  1.8 
Heater current, A  1.53 
Anode voltage, V  150 
Negative grid voltage, V  3 
Negative cutoff voltage (at anode voltage 1.55 kV, anode current 200 µA), V, at most  95 
Anode current, mA  27.2 
Inverse grid current (at heater voltage 1.8 V, grid voltage 3V, anode voltage 150 V), µA, at most  20 
Mutual conductance, mA/V  2.56 
Gain coefficient  2040 
Warm up time, s, at most  3 
Peak output power (at heater voltage 1.8 V, grid voltage 100 V, anode voltage 1.55 kV, peak grid voltage 120 V, resistance 10 Om in cathode circuit, frequency 900 MHz, pulse duration 3 µs, 1/duty factor 300), W, at least  800 
Interelectrode capacitance, pF:  
input  58.5 
output, at most  0.3 
transfer  36 
Limit Operating Values  
Heater voltage (AC or DC), V:  
maximum  1.9 
minimum  1.7 
Anode voltage (DC), kV  1.6 
Grid voltage (DC), V  200 
Peak grid voltage (negative overshoot) at pulse duration at most 1 µs, V  150 
Dissipation, W:  
anode (with heat sink)  10 
anode  6 
grid  0.5 
Peak anode current at pulse duration 3 µs and 1/duty factor 300, A  2 
Peak cathode current at pulse duration 3 µs and 1/duty factor 300, A  2.5 
Maximum pulse duration µs  3.3 
Maximum wavelength, cm  15 
Minimum 1/duty factor  300 
Anode seal temperature, °C  200 
Resistance in grid circuit, kOm  1 