myles_rose Posted December 17, 2003 Share Posted December 17, 2003 Mullard 12AX7 NVM on the horizon The testing of the GT Mullard 12AX7 recreation has just finished it's first pass. The results are looking great. As many know, Groove Tubes has many of their own tube designs and offerings. Some of these are tubes like the KT66HP, KT88SV, E34LS (not the same as the JJ E34L ... this is the only 30 watt EL-34 in the world), and the USA 6L6GE. As some folks know, GT purchased a lot of tooling such as that from the GE Ownesbourough KY plant when it shut down. This was the foundation for the 6L6GE. On the horizon, hopefully to be shown at 2004 Winter NAMM, is the USA GE 6CA7 tube. (There are photos of some of this tooling and operation on my website in the area at http://www.guitaramplifierblueprinting.com/gttubes.html Groove Tubes has some other items in the pipeline, and some of you have heard about the Mullard recreation. Well, the first tests are done, and pretty fantastic. This is the same tooling and design, along with the spring compression fitting over the cathodes (the kept microphics extremely low) of the original Mullard. This assembly was one of the design aspects used in the Mullard, and not in other tubes. This was very complex to accomplish, and will probably be pretty costly in production. These tubes are QUIET, and are the obly new 12AX7/ECC83/7025 tubes that actually meet NOS specs and RCA book specs. There may also be a second GT variant, something of a "super Mullard", that will exceed specs by a wide margin, and be just the ticket for complex front end amps such as channel switchers or complex front end amps such as Bogner, Mesa, etc., or give lots of current to push that signal in your Marshall. If I can get my boss to go for a "Super Variant", these would then be the basis for my SAG-MHG kit also. In any case, the first test results are in part II of v3.20 of my tube primer. This was just updated and uploaded to my wesite in the usual place. Compare these specs and data to earlier tests of all the current 12AX7s and NOS tubes in part 1 of v3.20. I'll keep folks informed. If you want to help me push my boss for an original variant and "super" variant also, drop me an email at GT and I will forward this on to him. At this time I have no release date, no cost info, or much other info. Myles S. Rose www.guitaramplifierblueprinting.com www.la-economy.blogspot.com www.facebook.com/mylesr www.twitter.com/myles111us Link to comment Share on other sites More sharing options...
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