Many truths here about tube manufacturers. There are only three that I know of. One in China, one in Slovakia, and one in Russia. China's Shuagang is the only tube maker that only has China branded sister companies, but sells tubes to all the major rebranders. JJ makes JJ tubes and sells tubes to EVERY rebrander name that exists. The Russian maker Reflektor, who also sells tubes to EVERY tube rebrander there is, has no tube brand of their own but is essentially EH, Svetlana, and New Sensor to name a few. The main rebranders are GT, TAD, Mesa, Fender, Valve Art, and PM Components to name a few. ALL the other tube names you know and love are made by one of those three companies. If you get a Tung-Sol tube it is made by Reflektor. If you get a Ruby tube, it is made by JJ. If you get a Golden Dragon it is made by Shuagang.

