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-KT66-TAD-X Vacuum Tube - KT66, Tube Amp Doctor, Premium Selected
The Tube Amp Doctor KT-66 is an incredible remake of the classic British tube. With its large glass envelope contoured by smooth curves tapering into a rounded brown base, the TAD KT-66 not only looks like the original, it performs like the original. This KT66 offers plenty of headroom for a thick full bodied sound with smooth yet articulate highs. The KT-66 is famously used in vintage British plexi amps and makes a great replacement for that style of amplifier and many others. The TAD KT66 is matched for both plate current and transconductance and passes all of the tests of the TAD Premium Selection process. The TAD KT-66 can be used in any KT-66 position as well as 6L6GC and 5881 amps that can supply the required 1.27A for the heater.
Starting at $25.15
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Originally: $27.95
T-5Y3GT-TAD Vacuum Tube - 5Y3GT, Tube Amp Doctor, Premium Selected, Rectifier
The Tube Amp Doctor 5Y3GT / 6087 is a small bottle rectifier designed to perform closely to the original rectifier tubes used in many 1950s tweed amplifiers. This rectifier offers high reliability due to its rugged construction and the Tube Amp Doctor Premium Selection process. The TAD 5Y3GT is a great tube for vintage style sag compression.
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Originally: $14.65
T-6SL7GT-TAD Vacuum Tube - 6SL7GT, Tube Amp Doctor, Premium Selected
The Tube Amp Doctor 6SL7GT meets all of the reliability and quality requirements of a TAD Premium Selected tube including low noise and gain balanced triodes. This 6SL7 has a great lively tone with smooth and clear highs and a sonically rich mid range. The TAD 6SL7GT can also be used as an upgrade for Russian 6N9 and 6N9P tubes.
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Originally: $24.95
T-7025-S-TAD Vacuum Tube - 7025 S, Tube Amp Doctor, Premium Selected
The vintage made in England Mullard ECC83 has been accurately recreated in the Tube Amp Doctor 7025 S. This highly sought after tube is regarded by many as the best dual triode to have ever been created for audio use. TAD offers a reliable and affordable way to experience the sound of this legendary tube.
The 7025 S is notable for its rich and complex harmonics. The warmth in the midrange of this tube stands out among similar preamp tubes. The TAD 7025 has nice round clean tones as well as a creamy yet articulate overdrive. Its rugged mechanical construction with extra thick mica spacers along with TAD’s premium selection process ensures a highly reliable preamp tube. Tube Amp Doctor especially recommends the 7025 S for use in British and British style amplifiers.
The Tube Amp Doctor 7025 works in any 7025, 12AX7, or ECC83 position.
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Originally: $32.95
T-EF86-TAD Vacuum Tube - EF86/6267, Tube Amp Doctor, Premium Selected
The Tube Amp Doctor EF86 / 6267 is a low noise and low microphonic version of the vintage pentode. These tubes were famously used in classic HiFi equipment and microphone preamps. The original Vox® AC15 circuit also used an EF86 and now, thanks to its recent availability, there are plenty of options for guitar amplifiers utilizing this unique tube.
The TAD EF86 / 6267 meets all of the standards of the Tube Amp Doctor Premium Selection process. This tube has a rugged construction featuring an aesthetically pleasing perforated shield. The TAD EF86 / 6267 will work in and EF86 or 6267 position.
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Originally: $22.95
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 $44.32
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Originally: $49.25
T-6550A-STR-TAD-X Vacuum Tube - 6550A-STR, Tube Amp Doctor, Premium Selected
The Tube Amp Doctor 6550A-STR is built and performs to the same standards as the highly sought after GE 6550A. TAD has meticulously designed the plate material to be as strong and pure as possible resulting in an exceptionally stable, consistent, and reliable 6550. The TAD 6550A features a thick straight glass envelope, a metal base, and an authentic triple getter. The frequency response of this tube is remarkably balanced and smooth. Transparent natural lows and thick rich mids with silky highs make this an excellent tube for HiFi equipment as well as classic bass guitar amplifiers. The Tube Amp Doctor 6550A-STR offers outstanding performance in all applications. This tube is matched for both plate current and transconductance. The TAD 6550A-STR also passes all of the tests required in the Premium Selection process.
Starting at $39.56
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Originally: $43.95
T-25CD6GB Vacuum Tube - 25CD6G, Beam Pentode
New Old Stock (N.O.S.) tube. 25CD6GB is identical to the 6CD6GA except with different heater ratings. Beam power tube, octal base.
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Originally: $8.05
T-930 Vacuum Tube - 930, Photocell, Sound
New Old-Stock (N.O.S.) tube. The 930 is a gas phototube sensitive to red through infrared light.
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Originally: $24.95
T-7189 Vacuum Tube - 7189, Pentode, Beam
New Old-Stock (N.O.S.) tube.
The 7189 is a power-amplifier pentode designed for use in the audio-frequency power output stage of television and radio receivers and high-fidelity amplifiers.
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Originally: $60.90
T-12AX7-SET-EH_JJ Vacuum Tube - Tube Set, 12AX7 Set, One EH and One JJ
Two 12AX7s. One of each of the following:
  • JJ Electronic 12AX7
  • Electro-Harmonix 12AX7
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Originally: $24.20
T-12AX7-SET_MINI Vacuum Tube - Tube Set, Mini 12AX7 Sampler, 5 Total
Five 12AX7s. One of each of the following:
  • 12AX7-S JJ Electronic
  • 12AX7A-C5 Ruby Tubes
  • 12AX7WA Sovtek
  • 12AX7 Electro-Harmonix
  • 12AX7 Tung-Sol

We reserve the right to substitute another tube if one is unavailable or out of stock.
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Originally: $67.05
T-12AX7-SET Vacuum Tube Set - 12AX7 Sampler, 10 total tubes
Ten 12AX7s. One of each of the following: JJ Electronic 12AX7, Mullard 12AX7, Tube Amp Doctor premium selected 12AX7, Ruby Tubes 12AX7, Sovtek 12AX7WA, JJ Electronic ECC803S, Chinese high-grade 12AX7B, Groove Tubes 12AX7, Electro-Harmonix 12AX7, Tung-Sol 12AX7
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Originally: $139.94
T-12AX7A-CHINA Vacuum Tube - 12AX7A, China
9 pin miniature preamp tube (Amplification Factor =100). This is the Chinese 12AX7A. The 12AX7A is a lower noise version of the 12AX7.
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Originally: $9.59
T-EL84-SET Vacuum Tube Sampler Set - EL84, 9 tubes total
Sampler set of EL84 vacuum tubes. Contains one each of the following: Electro-Harmonix EL84, Genalex Gold Lion EL84, JJ Electronic EL84, Mullard Reissue EL84, Sovtek EL84, Tung-Sol EL84, JJ Electronic EL844, Sovtek EL84M, Tube Amp Doctor EL84
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Originally: $139.45
T-7581A-TUNG Vacuum Tube - 7581A, Tung-Sol Reissue
Rated for more power than the standard 7581 (35W plate dissipation vs 30W plate dissipation).
Starting at $24.26
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Originally: $26.95
T-6AG7_6AK7 Vacuum Tube - 6AG7 / 6AK7, Pentode, Power
Metal, power-amplifier pentode primarily designed for use in the output stage of video amplifiers. The tube is capable of operating at high plate current levels and exhibits high transconductance and high power sensitivity.
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Originally: $7.90
T-6SN7-JJ Vacuum Tube - 6SN7, JJ Electronics
The JJ Electronic 6SN7 is the classic double triode with a rugged construction the offers the high reliability that JJ is known for. The JJ 6SN7 features the outstanding linearity and sound of the original tubes. This tube is an excellent replacement for Hi-Fi amplifiers and preamps and will replace any 6SN7, 6SN7GTA, 6SN7GTB, or 6SN7GT.
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Originally: $16.50
T-12BH7-A-JJ Vacuum Tube - 12BH7-A, JJ Electronics
The JJ Electronic 12BH7-A is a faithful reproduction of the original tube. Its rugged construction offers high reliability. The JJ 12BH7-A can be used as a replacement for any 12BH7 tube.
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Originally: $16.95
T-5881-JJ Vacuum Tube - 5881, JJ Electronics
The JJ Electronic 5881 is very similar to the 6L6GC but with a plate dissipation of 23W rather than 30W. Another physical difference is the shorter bulb. These tubes have a soft and balanced response that sounds great in both guitar amps and hifi equipment. The JJ 5881 will work in any amp that uses 6L6 tubes.
Starting at $17.06
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Originally: $18.95
T-C1K_6014 Vacuum Tube - C1K / 6014, Thyratron
Compact, quick heating thyratron designed for timing and control applications. It is xenon filled for quick starting and the ability to operate within very wide temperature limits.
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Originally: $119.90
T-AZ41 Vacuum Tube - AZ41, Rectifier, Full Wave
High vacuum full wave rectifying tube
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Originally: $12.90
T-931A-B Vacuum Tube - 931A-B, Photomultiplier
Multiplier phototube
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Originally: $49.90
T-8068 Vacuum Tube - 8068, Pentode, Beam
Beam pentode designed for use as a series regulator in high-voltage power supplies.
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Originally: $99.90
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