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Vacuum Tubes

15% off all Tube Amp Doctor tubes through April 30

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T-6L6-EH6L6, Electro-Harmonix
Electro-Harmonix 6L6 Vacuum Tube
Beam power tetrode modeled after the vintage RCA 6L6GC "blackplate". Features large plate dimensions and improved grid structure for increased power handling capabilities.
Starting at $19.25
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T-EL34-EHEL34, Electro-Harmonix
Most common power pentode found in British amplifiers such as Marshall, Hiwatt, Laney, and Sound City. The EL34EH defines the classic British rock sound of the 1960s and 1970s.
Starting at $15.00
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T-6V6GT-EH6V6GT, Electro-Harmonix
Octal power tube (Max Plate Watts = 14W)
Beam power tetrode with a specially developed cathode coating, careful alignment of the grid, tri-alloy plate material for flawless performance up to 475 volts. Perfect for high plate voltage amplifiers like the Fender Deluxe Reverb.
Starting at $18.50
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T-EL84-EHEL84, Electro-Harmonix
This power pentode is the perfect replacement for the VOX AC30 output tubes. A recommended output tube replacement for Peavey Classic 30 and Fender Blues Junior.
The EL84-EH tube is a remarkable reproduction of a vintage tube that is capable of maintaining its sweet and musical tone under any voltage conditions.
This tube has a larger diameter than most EL84 tubes so they will not fit into some Marshall DSL201 or DSL401 amplifiers, some reissue Vox AC15 amps, and Bad Cat amps.
This power pentode is the perfect replacement for the VOX AC30 output tubes.
Starting at $11.49
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T-KT88-EHKT88, Electro-Harmonix
Electro-Harmonix KT88 Vacuum Tube
High power kinkless-tetrode for use in amplifiers such as the Marshall Major. This tube is a favorite of audiophiles. Can be used in place of 6550 for a more "round" bass signature.
Starting at $32.25
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T-7591A-EH7591A, Electro-Harmonix
7591A Electro-Harmonix Power Tube
Beam power tetrode used in vintage Ampeg and Gibson guitar amplifiers. Also, used in tube hi-fi equipment made by Fisher, Scott, and Harmon-Kardon.
Starting at $21.25
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T-6973-EH6973, Electro-Harmonix
Electro-Harmonix 6973 Power Tube
Beam power amplifier used in vintage Gretsch and Magnatone amplifiers. This is a real 6973, not a rebrand of a "close" tube.
Starting at $18.75
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T-7868-EH7868, Electro-Harmonix
Electro-Harmonix 7868 power pentode tube with “novar” base. Made in Russia.
Starting at $29.50
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T-6550-EH6550, Electro-Harmonix
Electro-Harmonix 6550 Vacuum Tube
  • Rugged beam tetrode power tube used in Ampeg SVT, Sunn, and hi-fi amplifiers.
  • Uses a special high temperature leaded glass for reliability and superior vacuum integrity.
  • Special high-temperature leaded glass for reliability and vacuum integrity.
  • Tri-alloy plate material for maximum power and dissipation.
  • Available in singles and matched tubes.
Starting at $31.25
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T-6CA7-EH6CA7, Electro-Harmonix
Electro-Harmonix 6CA7 Vacuum Tube
Big bottle beam-tetrode version of EL34. Perfect EL34 replacement for Musicman amplifiers.
Starting at $19.95
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