1 X 6K3 = 6SK7 pentode RF/IF tube with an extended characteristic 1983. NEW. PCS 1.
The pentode 6K3 with an extended characteristic is designed to amplify the voltage of high and intermediate frequencies.
Uh=6,3V, Ug1=-3V, Ua=250V, Ug2=100V.

14. Ia=8,4mA, S=1,76mA/V, Ig2=2,2mA


 6K3 tube parameters
(rated mode)
6.3 V filament voltage
Heater current 300 ± 25mA
Anode voltage 250V
Second grid voltage 100V
Voltage on the third grid 0V
The bias voltage on the first grid is -3V
Anode Current 9.25 ± 2.75mA
The current in the circuit of the second grid 2.5 ± 0.9 mA
 Steepness of the characteristic 2.0 ± 0.4mA / V
The steepness of the characteristic at Uh = 5.7V> 1.3mA / V
The steepness at the beginning of the characteristic (Ug 1 = -35V) 1..30μA / V
Leakage current cathode-heater <20 μA
Input Capacitance 6.0 ± 1.2pF
Output Capacitance 7.0 ± 1.8pF
Feed Through Capacitance <0.003pF
Dimensions Ø33x67mm
Weight 40g

Limit parameters of the tube 6K3
 
Filament voltage 5.7..6.9V
Anode voltage 330V
The voltage of the second grid is 140V
Voltage on the first grid (constant) 0V
Maximum anode power 4.4W
Power dissipated by the second grid 0.44W
Highest voltage between cathode and heater ± 100V
The Tubes are never used. 

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