ᐉ 6N9S Tube: 6SL7 Tube Equivalent

🔊What is 6N9S Tube?

The 6n9s tube, hailing from the Soviet Union, is a double triode tube known for its amplification capabilities. With two independent triodes housed within, it has the power to amplify electric signals effectively. This tube is the Soviet equivalent of the 6SL7GT, a widely used tube in audio amplifiers and radio receivers. Sporting an octal base, it features eight pins for seamless connection to a socket. Notably, the 6n9s tube operates at a filament voltage of 6.3 volts and a current of 0.3 amperes, making it suitable for various audio applications. Its Soviet origin adds a touch of vintage allure to audio enthusiasts and collectors alike.

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6N9S Features:

It has a high gain and low noise
It can operate in high temperatures and voltages
It has a long lifespan and reliability
It has a warm and smooth sound quality

6N9S Using:

It can be used as a preamplifier or driver stage in audio amplifiers
It can be used as an oscillator or mixer in radio receivers
It can be used as a phase inverter or cathode follower in guitar amplifiers

📈6N9S Plate-grid and plate curves

💡6N9S VS 6SU7

The 6n9s and 6SU7 are double triode tubes utilized for audio amplification. While they share similarities in shape and base, they possess distinct electrical characteristics. The 6n9s, a Soviet tube equivalent to the American 6SL7GT, offers a high gain of 70 and a low plate resistance of 44 kOhm. It finds suitability in preamplifier stages and phase inverters. On the other hand, the 6SU7 is a special quality version of the 6SL7GT, designed with lower noise and microphonics. It exhibits a slightly lower gain of 67 and a higher plate resistance of 48 kOhm. This tube is commonly employed in high-end audio equipment and military applications. Both tubes deliver a warm and smooth sound, but the 6SU7 offers a more refined and detailed audio experience compared to the 6n9s.

🎼6N9S VS 6SL7

Differences:

The 6n9s was made in the Soviet Union, while the 6sl7 was made in the US and other countries
The 6n9s has a slightly higher gain and lower noise than the 6sl7
The 6n9s can operate in higher temperatures and voltages than the 6sl7
The 6n9s has a different bottle shape and markings than the 6sl7

Similarities:

They both have an octal base with eight pins
They both have a filament voltage of 6.3 V and a current of 0.3 A
They both have a warm and smooth sound quality
They both can be used as preamplifiers, drivers, oscillators, mixers, phase inverters or cathode followers

🎚️6SL7 Tube Equivalent

- - - ECC35,
    - 6SU7
    - 6N9P
    - 6N9S
    - 1579

🏭6N9S Tube Manufacturers:

Reflector: A Soviet tube factory that produced 6n9s tubes from the 1950s to the 1990s. Renowned for their exceptional quality and reliability, these tubes were highly regarded in the audio industry.
MELZ: Another USSR tube factory, MELZ specialized in manufacturing military and special purpose tubes. They created 6n9s tubes with metal bases and gold grids, making them rare and highly sought after by tube collectors and audiophiles. The price of 6N9S tubes with metal base can be – $100 USD, so it’s realy rare valve.
Tung-Sol: An American tube manufacturer, Tung-Sol invented the 6SL7GT tube in 1939. They were a leading supplier of tubes for the US military and industry. In addition to their military contributions, they also produced tubes for audio equipment and musical instruments. Tung-Sol tubes are widely acclaimed for their exceptional sound quality and long-lasting durability.

💸Average prices:

6SU7 tube average price ranges from about $30 to $74 USD

6SL7 Tube Price could range from approximately $20- $50 USD (Depending on the year of manufacture and condition)

6N9S Tube price ranges in average from about $3-5 for octal base and $20-50 for metal base

📊6N9S Tube Datasheet:

Type:	Double triode;
Application:	LF power amplification;
Cathode type:	oxide, indirect heating;
Envelope:	glass, miniature;
Filament voltage, V:	6.3;
Anode voltage, V:	250;
Filament current, mA:	300±25;
Anode current, mA:	2.3±0.9;
Differential transconductance, mA/V:	1.6±0.4;
IR:	44 kiloohm;
Gain constant:	70±15.

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6N9S tube : 6SL7 Tube Equivalent