GK11P
POWER TETRODE
The GK11P power tetrode is used for amplifying RF signals, including singlesideband ones, in commongrid or commoncathode circuits, in stationary RF equipment.
GENERAL
Cathode: directly heated, carbonized thoriated tungsten.
Envelope: metalceramic.
Cooling: forced (evaporation for anode, air for envelope).
Height: at most 630 mm.
Diameter: at most 244 mm.
Mass: at most 45 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  22 
Filament current, A  300340 
Mutual conductance (at anode voltage 2 kV, grid 2 voltage 1.5 kV, anode currents 15 and 25 A), mA/V  180230 
Gain coefficient (at anode voltage 2 kV, grid 2 voltages 1.5 kV and 1.0 kV, anode current 15 A)  58 
Anode current (at anode voltage 2 kV and grid 2 peak voltage, 1.5 kV), A, at least  38 
Negative bias voltage (at anode voltage 10 kV, grid 2 voltage 1.5 kV, anode current 5.5 A), V (absolute value)  220300 
Negative cutoff voltage (at anode voltage 10 kV, grid 2 voltage 1.5 kV, anode current 0.5 A), V (absolute value), at most  420 
Interelectrode capacitance, pF, max.:  
input  780 
output  120 
transfer  7 
Output power, kW, min.:  
at 30 MHz with anode voltage 15 kV, grid 2 voltage 1.0 kV, filament voltage 22 V  250 
during singlesideband signal amplification at relative level of 3rdorder combination components not worse than 36 dB and relative level of 5thorder combination components not worse than 40 dB, at 30 MHz with anode voltage 12 kV, grid 2 voltage 1.5 kV, filament voltage 22 V (peak value)  90 
Limit Operating Values  
Filament voltage (AC or DC), V  2123 
Anode voltage (DC), kV  15 
Grid 2 voltage (DC), kV  2 
Negative instantaneous grid 1 voltage (absolute value), kV  1 
Filament starting current, A  520 
Anode current (DC component under class Â conditions), A  45 
Dissipation, kW:  
anode  120 
grid 2  3 
grid 1  1.5 
Operating frequency, MHz  30 
Temperature at the hottest point of envelope, °C  175 
Averaged Anode Characteristic Curves:
U_{f} = 22V; U_{g2} = 750 V
Averaged Characteristics Curves:
U_{f} = 22V; U_{g2} = 1,500V
Averaged Anode Characteristic Curves:
U_{f} = 22V; U_{g2} = 1,000V
Averaged AnodeGrid Characteristic Curves:
U_{f} = 22V; U_{g2} = 750 V
Averaged AnodeGrid Characteristic Curves:
U_{f} = 22V; U_{g2} = 1,000V
Averaged AnodeGrid Characteristic Curves:
U_{f} = 22V; U_{g2} = 1.500V
Averaged Grid Characteristic Curves:
U_{f} = 22 V; U_{g2} = 750 V
Averaged Grid Characteristic Curves:
U_{f} = 22V; U_{g2} = 1.000V
Averaged Grid Characteristic Curves:
U_{f} = 22V; U_{g2} = 1,500V
Averaged Grid 2 Characteristic Curves:
U_{f} = 22V; U_{g2} = 750V
Averaged Grid 2 Characteristic Curves:
U_{f} = 22V; U_{g2} = 1,000V
Averaged Grid 2 Characteristic Curves:
U_{f} = 22V; U_{g2} = 1,500V
Averaged Characteristic Curves:
U_{f} = 22V; U_{g2} = 750V
_____ grid 1anode;
_ _ _ _ grid 2anode
Averaged Characteristic Curves:
U_{f} = 22V; U_{g2} = 1,000V
_____ grid 1anode;
_ _ _ _ grid 2anode
Averaged Characteristic Curves:
U_{f} = 22V; U_{g2} = 1,500V
_____ grid 1anode;
_ _ _ _ grid 2anode