Archive for the ‘tubes’ Category

(Note: During the initial 5 year period of warranty, using tubes other than those branded by Mesa will void the warranty of your amp.  This article is meant for people who have amps which are not under warranty.)

Mesa’s 6L6GC STR tubes are manufactured in China for Ruby Tubes.  It is a reproduction of the classic Sylvania 6L6GC STR.  Mesa buys a big batch from Ruby, tests them, keeps the tubes that meet their requirements, and sends back the tubes which fall out of range.  Ruby’s matched version of this same tube is the 6L6GCMSTR.  It costs considerably less than Mesa’s tubes. (more…)


(Edit: I confused some 6L6 sub-types in the original article, which I don’t think is hard to do).

I ran across this article about Sovteks and how the rating charts for several tube brands compare.  I am needing tube replacements and this seems pretty handy for finding tubes that fall into Mesa’s bias range for their 6L6GC.

I’ve been using Ruby 6L6GCMSTR, which is an excellent tube, and I will likely stick with it, but these others have piqued my interest in differences between the sub-types. (more…)