GK12A
POWER TRIODE
GENERAL
Cathode: directly heated, carbonized thoriated tungsten.
Envelope: metalceramic with an external copper anode.
Cooling: forced (water for anode, air for envelope).
Height: at most 400 mm.
Diameter: at most 190 mm.
Mass: at most 15 kg.
OPERATING ENVIRONMENTAL CONDITIONS  
Ambient temperature, °C  10 to +55 
Relative humidity at up to 25 °C, %  98 
BASIC DATA Electrical Parameters 

Filament voltage (AC or DC), V  6 
Filament current, A  250300 
Mutual conductance (at anode voltage 1 kV, anode currents 5 and 7 A, magnetic field intensity 950±50 Oe), mA/V, at least  45 
Gain coefficient (at anode voltages 1 and 5 kV, anode current 5 A, and magnetic field intensity 950±50 Oe), at least  140 
Peak anode current (at anode voltage 1 kV, grid voltage 100 V, peak excess grid voltage 1,000 V, magnetic field intensity 950±50 Oe), A, at least  40 
Negative cutoff voltage (at anode voltage 10 kV, anode currentO.1 A, magnetic field intensity 950±50 Oe), V (absolute value), at most 
60 
Interelectrode capacitance, pF, max.:  
gridcathode  170 
gridanode  90 
anodecathode  0.8 
Output power (at 1 MHz, anode voltage 10 kV, filament voltage 6.0V, magnetic field intensity 950±50 Oe), kW  60 
Limit Operating Values  
Filament voltage (AC or DC), V  5.76.3 
Anode voltage (DC), kV  11 
Negative bias voltage, V (absolute value)  1.000 
Filament starting current, A  430 
Anode current (DC component), A  7.5 
Grid current (DC component), A  0.3 
Magnetic field intensity, E  9001,000 
Dissipation, W:  
anode  2.5x10^{4} 
grid  500 
Operating frequency, MHz  30 
Temperature at envelope (hottest point). °C  150 
Averaged Grid Characteristic Curves:
U_{f} = 6V; magnetic field intensity (N) 79,577.5 Am
Averaged AnodeGrid Characteristic Curves:
U_{f} = 6V; magnetic field intensity (N) 79,577.5 Am
Averaged Grid Characteristic Curves:
U_{f} = 6V; magnetic field intensity (N) 1,0000 G
Averaged AnodeGrid Characteristic Curves:
U_{f} = 6V; magnetic field intensity (N) 1.000 G