There are only 2 major manufacturers of vacuum tubes in production today that are available for electric guitar and bass amplifiers. Many other companies "relabel" these tubes with their own logo, but a few of them like Tube Amp Doctor, ARS, and Mesa Boogie do extensive testing and matching before boxing and shipping to the customer.
1. The JJ/Tesla plant founded in Czechoslovakia, has been around since the 1920's but are now building in the Slovak Republic.
2. The Xpo-pul plant in Saratov, Russia, builds for Mike Matthews, CEO of Electro Harmonix. He has the rights to Sovtek, Tung-Sol, Genelux, Electro Harmonix, Svetlana, and Mullard.
$ 180.00
6L6GC-STR BLACKPLATE RCA-Style TAD PREMIUM Selected The Classic 6L6 Sound - Excellent Tone and Maximum Lifetime!TAD has the remakes of the all time favorite 6L6 classics by RCA and GE....
$ 265.00
A.F. BEAM PENTODE. KT88 is a beam output pentode with an octal base and power of 42W. Very powerful, with strong bass and very bright highs. It can also be...
$ 75.00
POWER PENTODE 7591 S is an octal power pentode with power of 19W. Special tube for some types of vintage amplifiers.
$ 220.00
Chinese made large bottle KT66 output tube for electric guitar amplifiers.
$ 175.00
Higher impedance design with increased touch responsiveness and a unique clipping characteristic with a hint of the 6L6 sound. Very similar to the KT77.
$ 249.00
These Groove Tubes KT66 Gold Series HP tubes in a matching quad are tubes I've had for a long long time. Originally, I had a custom Soldano SLO-100 212 combo...
$ 125.00
Super Premium power beam tetrode & exact copy of the original clear glass KT66, used in the early Marshall amps which created Eric Clapton’s “Bluesbreaker" Tone.” Full sound with improved...