AMPEREX 7986-5866 Power Triode Electron Vacuum Tube 7986/5866.A

( Brand: Amperex ), ( Manufacturer Part Number: 7986/5866 ), ( Type: Vacuum Tube ), ( Unit Type: Unit ), ( Country/region Of Manufacture: France )

Review AMPEREX 7986/5866 Vintage 7986/5866.a Power Triode Electron Vacuum Tube

Amperex 7986/5866 Power Triode Electron Vacuum Tube - A Legacy of Quality and Performance

Step into the realm of classic audio technology with the Amperex 7986/5866 Power Triode Electron Vacuum Tube. This tube is a testament to Amperex's long-standing commitment to quality, innovation, and the preservation of traditional audio engineering techniques.

The Amperex 7986/5866 is a versatile power triode, designed to deliver exceptional performance in a variety of applications, including high-end audio amplifiers, vacuum tube powered guitar amplifiers, and high-fidelity audio systems. This tube is a dual-pin version of the popular 7986 and 5866, offering the best of both worlds in a single package.

The 7986/5866 is renowned for its smooth, rich, and detailed sound. Its warm and inviting tone adds a touch of nostalgia to modern audio equipment, while its ability to drive high-impedance loads makes it an ideal choice for vintage amplifier restoration projects. The tube's high power handling capabilities ensure that it can deliver consistent, high-quality sound even under heavy load, making it a favorite among audiophiles and musicians alike.

Crafted with precision and care, each Amperex 7986/5866 undergoes rigorous testing to ensure that it meets the highest standards of performance and reliability. Its robust construction and durable glass envelope make it a reliable addition to any audio system, providing years of enjoyment and exceptional sound quality.

Incorporating the Amperex 7986/5866 into your audio setup is more than just an upgrade; it's a journey back to a time when audio was a passion, a craft, and a labor of love. Experience the warmth, the detail, and the soul of vacuum tube technology with the Amperex 7986/5866 Power Triode Electron Vacuum Tube.

The Amperex 7986/5866 power triode electron vacuum tube is a popular choice among audio enthusiasts and electronic hobbyists. Here are some pros and cons to consider before making a purchase:

1. High Power Handling: The Amperex 7986/5866 can handle a high power output, making it suitable for amplifier applications where high power is required.

2. Wide Frequency Response: This tube has a wide frequency response, which helps in producing clear, detailed, and accurate audio.

3. Good Microphonic Resistance: Compared to other vacuum tubes, the Amperex 7986/5866 has good resistance to microphonic effects, which are vibrations that can cause unwanted noise in the audio output.

4. Wide Availability: These tubes are relatively easy to find and are not as expensive as some other high-end vacuum tubes, making them accessible to a wider audience.

1. Limited Life Span: Like all vacuum tubes, the Amperex 7986/5866 has a limited lifespan. With regular use, the tube will degrade over time and may need to be replaced.

2. High Power Consumption: These tubes consume more power compared to solid-state components, which can lead to higher energy bills over time.

3. Sensitive to Handling: Vacuum tubes are fragile and can be easily damaged if not handled properly. Mishandling can lead to reduced performance or even complete failure of the tube.

4. Requires Maintenance: Vacuum tubes need regular maintenance to ensure proper performance. This includes regular alignment and biasing, which can be time-consuming.

In conclusion, the Amperex 7986/5866 power triode electron vacuum tube offers excellent performance for audio applications, particularly for those seeking a warmer, more dynamic sound compared to solid-state components. However, its limited lifespan, high power consumption, sensitivity to handling, and maintenance requirements are important factors to consider. If you are willing to invest in regular maintenance, and appreciate the unique sound characteristics of vacuum tubes, then the Amperex 7986/5866 may be a worthwhile investment. If, on the other hand, you prefer a low-maintenance solution with a longer lifespan, then a solid-state alternative may be more suitable.

Details:

I do a lot of business with them and they always have well cared for gear. Please look at all pictures closely before purchasing. Photos are the best. I did purchase from a local operator.

Not saying it won't need adjustments but, looks like a nice clean unit. I am not an operator and don't have the knowledge to fully test myself. Everything you see in the pictures is what included this lot. Items may need a more in depth cleaning.

part #: 79865866 prices

• $175.00-$199.00

specifications tubesocketvintagego:

• brand: Amperex
• mpn: 7986/5866
• type: Vacuum Tube
• unit type: Unit
• country/region of manufacture: France

offer tubesocketvintagego:

• availability: In Stock
• options: Ship-to-home
• best offers: True
• quantity: 1
• started: June 15, 2025
• sold: 0

returns tubesocketvintagego:

• policy: No Returns

general tubesocketvintagego:

• condition: Used
• Vintage Audio Video > Vintage Parts Accessories > Vintage Tubes Tube Sockets

payments tubesocketvintagego:

• wallet: Paypal
• credit card: Visa
• other

seller tubesocketvintagego:

• # reviews: 7730
• city: Federal Way, Washington
• rating: 99.4%

shipping tubesocketvintagego:

• cost: $11.99
• carrier: USPS
• class: Standard
• type: Fixed
• service: USPS Ground Advantage
• transit: 7-14 Days

Amperex 7986-5866 Is Similar To:

• 10244 Amperex Nos Photomultiplier Tube (33% similar) The face has some wear that should be mentioned. From the inventory of a closed lab...(May 31st, 2017)
• 10ld6 Amperex Nos Vacuum Tubes Tests Good (37.5% similar) ...(October 9th, 2018)
• 11.800 Amperex Beckman Holland 6922 Gold Pin Vacuum Tube V Strong 10 900 11.800 Mhos (31% similar) This tester uses regulated power sources for the bias, plate, screen voltage s, as well as modified operating testing procedures green girl's guaranteed VINTAGETUBES211. Ma results 10,900 11,800 hos tubes can be accurately matched for gm plate current at the manufacturer's specified test points or ...(August 19th, 2016)
• 11af9 Vintage Amperex Serious Tubes For (40% similar) Vintage Amperex...(March 7th, 2017)
• 13gf7a Zenith Amperex 2 Double Triode Vacuum Tubes Nos Tested (45.5% similar) 2/1 3GF7A double triode vacuum tubes nos tested zenith Amperex tested good on mercury 202...(December 14th, 2016)
• Valvo 150c1 Amperex Tube 3 Qty Type (22.6% similar) Used, not tested, sorry I cannot test this type. One Amperex and two Volvo. These have some loose glue in the bases. Unusual European tube type. Three 3/1 50C1 tubes...(January 23rd, 2015)
• 15545 Amperex Lot Of Tube Made In Germany Globe Strong One (24.8% similar) All tubes have a number in the bottom of glass between pins: 2,2,10,10,5 printing on is pretty good condition considering they are almost 50 years old. All of same construction...(October 13th, 2018)
• 17ew8-hcc85 Amperex Radio Tube Tested (29.6% similar) Tested strong on a b k 650 DNA-quick tester. I am only shipping these via USPS priority mail so they arrive secure and quick. All have been tested and 90 test strong, but good. View my other listings for more vintage radio tubes. This sale is for 1 Amperex 17EW8 HCC85 radio tube. Although some may ...(May 1st, 2018)
• 17gt5 Tube Electron Amperex (36.7% similar) ...(March 11th, 2015)
• 1x2a B Amperex Nos Vintage (32.3% similar) Tech-harvester offerings...(September 14th, 2017)
• 21-020-2 Vintage Amplifier Cycle-dyne Tubes Amperex Radio Transmitting 5868 Ham (26.7% similar) Great find great deal...(March 4th, 2015)