GS31B
TRIODE
The GS31 B triode fulfils generation and amplification functions in groundedgrid circuits in continuouswave operation in the decimetric and metric wavelength ranges.
GENERAL
Cathode: indirectly heated, dispenser, oxidecoated.
Envelope: metalceramic.
Cooling: forced air.
Height, mm, at most:
A  anode; C  grid; KP  cathode and heater; P  heater
OPERATING ENVIRONMENTAL CONDITIONS 

Vibration loads:  
frequency, Hz  52,000 
acceleration, m/s²  98 
Multiple loads with acceleration, m/s²  343 
Single impacts with acceleration, m/s²  1,470 
Linear loads with acceleration, m/s²  490 
Ambient temperature, °C  60 to +70 
Relative humidity at up to +40 °C, %  98 
BASIC DATA Electrical Parameters 

Heater voltage, V  12.6 
Heater current, A  3.13.7 
Mutual conductance (at anode voltage 2 kV, grid voltage 1 V and anode current 250 mA), mA/V, at least  22 
Operating point (negative grid voltage at anode voltage 2 kV and anode current 250 mA), V  612 
Interelectrode capacitance, pF:  
input  1924 
output, at most  0.12 
transfer  3.85.2 
Warm up time, s, at most  120 
Output power, W, min.:  
at anode voltage 1.8 kV, anode current 500 mA, wavelength 60 cm  360 
at anode voltage 1.7 kV, anode current 700 mA, wavelength 30 cm  180 
Limit Operating Values  
Heater voltage, V  1213.2 
Anode voltage, kV:  
DC  3 
instantaneous value  6 
Grid voltage (instantaneous value), V  400 to +120 
Cathode current (r.m.s. value), A  1.4 
Dissipation, W:  
anode  1.0x10^{3} 
grid  22 
Temperature at anode lead, °C  200 
Temperature at cathode and grid leads, °C  120 
Temperature at external ceramic parts, °C  250 
Wavelength,cm  28100 
Averaged Characteristic Curves:
U_{f} = 12.6V;
_____ anode;
_ _ _ gridanode
Averaged Characteristic Curves:
U_{f}= 12.6V;
_____ grid;
_ _ _ anodegrid
Averaged Characteristic Curves Showing Output Power and Efficiency versus Anode Current:
U_{f} = 12.6V; L = 30cm;
_____ output power (P);
_ _ _ efficiency (n)
Averaged Characteristic Curves Showing Output Power and Efficiency versus Anode Current:
U_{f} = 12.6V; L = 30cm;
_____ output power (P);
_ _ _ efficiency (n)