The Russian 6N6P (6Н6П) is a miniature double triode enclosed in a glass bulb with a nine-pin base and an indirectly heated oxide-coated cathode, designed for low-frequency power amplification. It is equivalent to the ECC99 and similar to the E182CC. The tube is a New Old Stock (NOS) item, never used. It is resistant to ambient temperatures from −60 to +70 °C, relative humidity of 95–98% at +40 °C, and mechanical loads including linear loads up to 100 g, vibration loads up to 2.5 g, single impact loads up to 500 g, and multiple impact loads up to 12 g.

Key Features & Specifications

• Original name: 6N6P / 6Н6П
• Type: double triode
• Application: LF power amplification
• Cathode type: oxide, indirect heating
• Envelope: glass, miniature
• Filament voltage: 6.3 V
• Filament current: 0.59–0.81 A
• Anode voltage: 120 V
• Anode current: 0.02–0.04 A
• Anode power: 4.8 W
• Grid 1 voltage: −2 V
• Steepness (transconductance): 8.1–13.9 mA/V
• Reverse grid current: 0.5 µA
• Microphonic noise: 100 mV
• Gain: 16.0–24.0
• Socket type: rsh8
• Maximum weight: 20 g
• Service life guarantee: 2,000 hours

Applications & Compatibility

• Primary use: low-frequency power amplification in audio equipment.
• Audio use: output stage in small single-ended amplifiers, driver and preamplifier stages, and cathode follower circuits.
• Equivalents: ECC99; similar to E182CC.
• Environmental and mechanical ratings: ambient temperature −60 to +70 °C; relative humidity 95–98% at +40 °C; linear loads up to 100 g; vibration loads up to 2.5 g; single impact loads up to 500 g; multiple impact loads up to 12 g.

Condition

• Status: NEW, NOS (New Old Stock). Never used before.
• Origin: Made in the USSR.

Why Choose This Tube?

The 6N6P offers a compelling combination of low plate resistance, moderate gain, and robust construction, making it a versatile choice for both small power amplifiers and driver stages. Its electrical characteristics place it close to the ECC99 and E182CC, allowing it to substitute in many circuits designed for those types with only minor adjustments. The tube's resistance to temperature extremes, humidity, and mechanical shock reflects its Soviet-era design for demanding environments, ensuring reliable operation in portable and fixed installations alike. As a NOS item, it provides stable performance and long service life, whether you are restoring vintage equipment or building a new low-power audio project. Its 2,000-hour guaranteed service life and maximum weight of 20 g complete a package that is practical, durable, and sonically well regarded.