6N15P

The Russian 6N15P (6H15П rus.) common-cathode double triode. Designed to amplify low-frequency voltage and generate high-frequency oscillations. It is used in high-frequency stages of ultra-short-wave radio devices. It operates in any position. The cathode is indirectly heated with an oxide coating.
Pin: 7-pin (RSh4).
The 6N15P (6N15 Chinese version) is equivalent to the following tubes: 6J6, ECC91, 6CC31.

6 – number indicating the rounded value of the tube filament voltage in volts;
N – letter identifying the tube type (double triode);
15 – the development serial number for this type of tube;
P – miniature (finger-shaped) tube in a glass shell with a bulb diameter of 19 or 22.5 mm.

Technical specifications:

• Heater voltage: 6.3V ± 0.6V
• Heat current: 450mA ±30mA
• Nominal anode voltage (DC): 100V
• Limiting anode voltage (DC): 330V
• Anode current of each triode: 9mA ± 3.5mA
• Cathode current: not less than 40mA
• Maximum power dissipated by each anode: 1.6W
• Output power: not more than 0.7W
• Maximum voltage between cathode and heater (DC): 100V
• Slope of each triode: 5.6mA/V ± 1.7mA/V
• Gain of each triode: 38 ± 10
• Cathode circuit resistance for automatic bias: 50Ohm
• Grid circuit resistance: maximum 1MOhm
• Input capacitance of each triode: 2.3pF ± 0.7pF
• Output capacitance of the first triode: 0.55pF ± 0.2pF
• Output capacitance of the second triode: 0.45pF ± 0.2pF
• Transmission capacitance of each triode: 1.5pF ±0.3pF
• Capacitance between the cathode and the heater: 6.6pF ± 2.1pF

Operating time not less than 1500 hours.