6J5P (original box)

 The 6J5P (6Zh5P / 6Ж5П rus.) is a Soviet high-frequency pentode designed for wideband voltage amplification in the high-frequency range. Works in any position. Base -7 pin.

The 6J5P vacuum tube can be used as an audio preamplifier (due to its high gain and ability to operate at low anode voltage).

Equivalents: 6AH6(W, A), 6F36, 6485.

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

Technical specifications:

• Heater voltage: 6.3 ± 0.6V
• Heat current: 450 ± 25mA
• Nominal anode voltage (DC): 300V
• Limiting anode voltage (DC): 300V
• Anode current: 9.5 ± 4.5mA
• Nominal grid voltage (DC): -2V
• Reverse grid current 1: no more than 0.3μA
• Nominal grid voltage 2 (DC): 150V
• Limiting grid voltage 2 (DC): 150V
• Second grid current 2: no more than 3.5mA
• Maximum anode dissipation power: 3.6W
• Maximum grid dissipation power 2: 0.5W
• Maximum cathode-to-heater voltage: 100V
• Slope of characteristic: 9 ± 3mA/V
• Internal resistance: at least 240kOhm
• Grid 1 circuit resistance: 1 MOhm
• Input capacitance: 8.5 ± 1.5pF
• Output capacitance: 2.2 ± 0.4pF
• Transmission capacitance: no more than 0.03pF

The minimum operating time is not less than 2000 hours.