6J4P

Russian high-frequency miniature pentode 6J4P (6Zh4P / 6Ж4П rus.) with a short anode-grid characteristic. Designed to work in broadband amplification circuits and high-frequency voltage conversion. The 6J4P tube is used in general-purpose radio engineering devices. Works in any position.

Base – 7 pin.

Equivalent to tubes: 6AU6, EF94, 6J4 (Shuguang), 7543

• Stamp of technical control department of the manufacturer ” ОТК “

Technical specifications:

• Heating voltage 6.3 ± 0.6V
• Heating current 300 ± 25mA
• Nominal anode voltage (constant) 250V
• Limiting anode voltage (constant) 300V
• Anode current 11 ± 3.3mA
• Limiting cathode current 20mA
• Reverse current of the first grid no more than 0.5μA
• Nominal second grid voltage (constant) 150V
• Limiting second grid voltage (constant) 150V
• Second grid current 4.5 ± 1.7mA
• Limiting anode dissipated power 3.5W
• Limiting second grid dissipated power 0.9W
• Limiting cathode-heater voltage (constant) 90V
• Characteristic slope 5.7 ± 1.1mA/V
• Internal resistance about 0.9 MOhm
• Resistance in the cathode circuit for automatic bias 68Ohm
• Resistance in the grid circuit first limit 0.5MOhm
• Input capacitance 6.3pF
• Output capacitance 6.3pF
• Transmission capacitance no more than 0.0035pF

The minimum operating time is not less than 5000 hours.