6J52P (original box)

 The 6J52P (6Zh52P, 6Ж52П rus.) high-frequency miniature low-noise pentode with a short anode-grid characteristic.
Designed for operation in HF broadband voltage amplification circuits. The 6J52P pentode is used in television and other equipment as a high-frequency amplifier.
Works in any position. Base -9 pin.

6J52P is almost equivalent or a direct replacement for the D3a, E810F and 7788 electron tubes, pinout is the same, the parameters are different.

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

Technical specifications: 

• Heating voltage:  6.3V ± 0.6V
• Glow current: 330mA ± 40mA
• Anode voltage: 100V
• Voltage on the second grid: 150V
• Resistance in the cathode circuit: 24Ohm
• Current in the anode circuit: 41mA ± 11mA
• Current in the circuit of the second grid: not more than 8mA
• Steepness of characteristic: 55mA/V ± 10mA/V
• Input resistance: 0.7kOhm
• Equivalent noise resistance: 150Ohm
• The current of the first grid is reversed: not more than 0.2μA

Maximum allowable electrical values:

• The highest voltage on the anode: 250V
• The highest voltage on the second grid: 250V
• Maximum power dissipated on the anode: 7.5W
• The highest power dissipated on the second grid: 1.2W
• The highest current in the cathode circuit: 60mA
• The highest voltage of the cathode-heater: 200V
• The highest resistance in the circuit of the first grid: 0.5mOhm

The minimum operating time is not less than 2000 hours.