6К4П / 6K4P
High-frequency miniature pentode with an extended anode-grid characteristic.
Designed to amplify intermediate and high frequency voltages in circuits with an AGC system.
The 6K4P high-frequency pentode is used in RF amplification stages in broadcast and automotive receivers.
Works in any position.
Available in glass finger design.
Indirectly heated oxide cathode.
7-pin base with button bottom.
Pin location: РШ4.
Overall dimensions of the 6K4P pentode:
- lamp height - 62 mm;
- lamp diameter - 19 mm.
Explanation of the high-frequency pentode markings:
6K4P
6 - a number indicating the rounded value of the lamp filament voltage in volts;
K - letter defining the type of lamp: K - high-frequency pentode with an extended characteristic;
4 - the serial number of the development of this type of lamp;
P - a letter characterizing the design: P - a miniature (finger) lamp in a glass shell with a cylinder diameter of 19 or 22.5 mm.
Technical characteristics and electrical parameters of the 6K4P lamp:
Filament voltage 6.3 ± 0.6 V
Filament current 300 ± 25 mA
Nominal anode voltage (DC) 250 V
Anode voltage limit (constant) 300 V
Anode current 10 ± 3.3 mA
Cathode current limit 20 mA
Reverse grid current of the first is no more than 0.5 µA
Grid voltage second nominal (constant) 100 V
Second limit grid voltage (constant) 125 V
Second grid current 3.7 ± 1.3 mA
Power dissipated by the anode, maximum 3 W
Power dissipated by the second grid, maximum 0.6 W
Maximum voltage between cathode and heater (constant) 90 V
Characteristic slope 4.4 ± 0.9 mA/V
Internal resistance not less than 0.45 MOhm
Input impedance at 60 MHz 19 kOhm
Cathode resistance for auto bias 68 ohms
Resistance in the first grid circuit is maximum 0.5 MOhm
Input capacitance 6.4 pF
Output capacitance 6.7 pF
Pass-through capacitance no more than 0.0045 pF
Miniature glass decoration