Vacuum Tubes

The first electronic amplification of sound was done with Vacuum Tubes. We have pre-amp, power and rectifier vacuum tubes among other types in New Old Stock from the golden era of American & European manufacturing as well as current production tubes from today.

Vacuum Tubes

The first electronic amplification of sound was done with Vacuum Tubes. We have pre-amp, power and rectifier vacuum tubes among other types in New Old Stock from the golden era of American & European manufacturing as well as current production tubes from today.
T-KT88-GEN Vacuum Tube - KT88, Genalex Gold Lion
KT88 power tube reissue of Genalex Gold Lion. Made in Russia.
In 1957 Marconi-Osram Valve Co. (Genalex) introduced the "King of Power Tubes", the legendary Gold Lion KT88. This tube became the heart and soul of such classics as the Dynaco Mark III, McIntosh MC275, and Marshall Major. Unfortunately, Genalex ceased tube production in the early 1980s and the Genalex Gold Lion KT88 has become very expensive and hard to find.
After extensive research and engineering, New Sensor Corp. has reissued the famed Genalex Gold Lion KT88.
Starting at $52.65
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Originally: $58.50
T-KT88-JJ Vacuum Tube - KT88, JJ Electronics
A sonically faithful reproduction of the original tubes with a robust construction encased in a thick glass envelope. The JJ KT88 delivers a powerful 42 Watts with plenty of headroom to spare. This tube has a tone that is warm and lively with a detailed and balance response. The JJ KT88 is an excellent choice for Hi-Fi stereo equipment as well as guitar amplifiers. It can be used in place of 6550 tubes.
Starting at $35.96
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Originally: $39.95
T-KT88-MUL Vacuum Tube - KT88, Mullard Reissue
Premium Octal beam Tetrode, an exact copy of the KT88 valve manufactured by Marconi-Osram for Marshall in the late 1960s and 70s. Powerful, balanced and detailed soundstage with full bass.
  • Direct replacement for any 6550 types
  • Excellent replacement output valve for the Marshall Major, retains the original sound
  • Equally well suited for hifi
Starting at $39.56
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Originally: $43.95
T-KT88-STR-TAD-X Vacuum Tube - KT88-STR, Tube Amp Doctor, Premium Selected
The Tube Amp Doctor KT88-STR is build just like the original tube with its thick curved glass envelope and metal base. The similarities don’t stop with its attractive appearance. This KT88 offers a lively and dynamic tone that is ideal in both HiFi audio amplifiers and high wattage guitar / bass amps. The sound of the TAD KT88 is pleasantly warm at all frequencies with detailed mids, articulate and nuanced highs, and harmonically rich and natural lows. The linear response is excellent. The TAD KT88-STR is matched for both plate current and transconductance and passes all of the tests of the TAD Premium Selection process.
Starting at $44.06
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Originally: $48.95
T-KT88-VA Vacuum Tube - KT88, Valve Art
Octal power tube (Max Plate Watts = 42W).
Starting at $36.83
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Originally: $40.92
T-KT90-EH Vacuum Tube - KT90, Electro-Harmonix
Electro-Harmonix KT90 power tube. Made in Russia.
Absolutely the best KT90 ever developed. Wafer base height of 0.34”.
Starting at $43.16
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Originally: $47.95
T-KT120-TUNG Vacuum Tube - KT120, Tung-Sol Reissue
Super-premium Octal Beam Tetrode, impervious to overload when used at parameters found in existing 6550/KT88/KT90 circuits. Plate dissipation of 60 watts and higher current handling capacity has allowed the design of new amplifiers which are unique, extremely powerful and stable.
Starting at $43.16
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Originally: $47.95
T-PX300B-GOLD-GEN Vacuum Tube - PX300B, Genalex Gold Lion, Gold Pin
Genalex Gold Lion PX300B power triode tube with gold pins. Made in Russia. In Europe during the 1930s the GEC (Genalex)/Marconi-Osram PX4 and PX25 power triodes were considered the finest audio triodes of their day. In keeping with the tradition of Genalex to provide the highest quality tubes, New Sensor has released the Genalex Gold Lion PX300B audio power triode. This tube is the highest quality 300B type available and is considered to be an upgrade in any 300B amplifier.
Starting at $129.56
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Originally: $143.95
T-X201A Vacuum Tube - X201A, Triode, Globe, Long Pin
Triode, Globe, Long Pin
$48.69
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Originally: $54.10
T-6W5-G Vacuum Tube - 6W5-G, Rectifier, Full Wave
New Old Stock 6W5-G. Full-wave high-vacuum rectifier.
$17.96
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Originally: $19.95
T-EL84S-STR-TAD-X Vacuum Tube - EL84S-STR Blackplate, TAD, Premium Selected
The Tube Amp Doctor Blackplate series offers the highest tube performance due to the stable heat dissipation of the black anode. This results in an increased tube-life and tones that rival the classic NOS tubes.
Starting at $17.95
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Originally: $19.95
T-7189-TUNG-X Vacuum Tube - 7189, Tung-Sol Reissue
Tung-Sol has reissued the rare 7189, a high fidelity audio specific variation on the EL84 tube. In addition to the increased fidelity, the 7189 features a higher maximum plate voltage rating of 400V. These tubes are great for both guitar and HiFi amplifiers and can be used in any EL84 or 6BQ5 position.
Starting at $26.95
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Originally: $29.95
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