GK9B
TRIODE
The GK9B triode is a RF power amplifier with an output power of up to 30 kW at frequencies up to 2 MHz, designed for use in stationary RF equipment.
GENERAL
Cathode: directly heated, carbonized thoriated tungsten.
Envelope: glasstometal.
Cooling: forced air.
Height: at most 338 mm.
Diameter: at most 218 mm.
Mass: at most 12 kg.
OPERATING ENVIRONMENTAL CONDITIONS  
Ambient temperature, °C  10 to +55 
Relative humidity at up to 25 °C, %  98 
BASIC DATA Electrical Parameters 

Filament voltage, V  8.3 
Filament current, A  120150 
Mutual conductance (at anode voltage 1 kV and anode currents 2 and 12 A), mA/V  4258 
Gain coefficient (at anode voltages 4 and 8 kV and anode current 2.5 A)  2432 
Negative cutoff voltage (at anode voltage 10 kV and anode current 0.2 A), V, at most 
420 
Interelectrode capacitance, pF, max:  
input  80 
output  2 
transfer  50 
Limit Operating Values  
Filament voltage, V  7.98.7 
Anode voltage (DC), kV  12 
Filament starting voltage, A  250 
Dissipation, W:  
anode  1.8x10^{4} 
grid  500 
Operating frequency, MHz  2 
Temperature at envelope, stem and seals, °C  150 
Envelope temperature at the hottest point, °C  250 
Averaged Characteristic Curves:
U_{f} = 8.3V
_____ anodegrid;
_ _ _ grid
Averaged Characteristic Curves:
U_{f} = 8.3V
_____ anode;
_ _ _ gridanode