J'ai trouvé ce site qui teste différentes 6L6 et 5881 :
http://www.thetubestore.com/6l(...).html
Très intéressant, et apparemment la Tung-Sol 5881 est vraiment très bonne.
Citation:
Tung-Sol 5881 Re-issue - Just like the movie title we are "back to the future" for the 5881 beam tetrode. Anything you could have hoped to get from that hidden stash of vintage glass can be had from currently produced Tung-Sol 5881's. The best of North American tube tone has been brought back courtesy of Russia.
The Tung-Sol 5881 may be the best option available for guitar toting tone freaks. The magic is definitely not in the name. The new T.S. 5881 has it all going on. The pair I evaluated has been seeing steady gigging use for about 8 weeks. In this case, about 20 hours a week in a 1964 Fender Bassman running flat-out. One tube has drifted about 1ma, but that's after 150+ hours of full power usage.
The tone is everything you would expect from NOS for about 1/3 of the price. These are full spectrum bottles that deliver everything from the classic,deep, "piano-like" lows to crystal clean highs. They are very tolerant with regards to biasing; allowing anything from 50% - 80% of rated plate dissipation to be dialed in at idle while still producing great tone. The construction differs slightly from the NOS in my possession but they are very close. Microphonics has not been an issue at all; no ringing, pops, ticks or squeals - unless you create them with a guitar. The overdriven tone is thick but articulate and just gets fatter the harder they are driven. Dime your amp and then use your guitar's volume and tone controls to dial in just about anything you want.
Et apparemment, les 5881 modernes qui équipent actuellement certains amplis sont des Sovtek dont voici la critique:
Citation:
The Sovtek 5881WXT is a reliable beam tetrode delivering a warm, round tone that "sweetens" any vintage or modern guitar amp design. Built to rigid military standards, the 5881 will tolerate higher voltages than most other 6L6's. This tube is the same as the 5881 / 6L6GC / 6L6G but with a full size base for easy installation in vintage amp designs.
From our review of this tube: "Solid construction and good performance. While not outstanding, the 5881WXT is probably the most commonly used tube of its type. Many amp manufacturers have been using these reliable workhorses as original equipment components. A good choice for general purpose use but not as rich in harmonic content as others in this class. If you like to run your guitar straight into the amp, there are better choices. If you prefer to run through a bunch of rack equipment or like major crunch and overdrive sounds then this tube will work well."
Ensuite, voici une autre description de la nouvelle TS 5881:
Citation:
Built just like the old original, these new Tung-Sol 5881 have great compression and a lot of the tonal character you would expect from the Tung-Sol brand. We compared these to the JAN 6L6WGB and NOS Tung-Sol 5881 are were very surprised to hear how good they are. If you have a Bassman or any other 6L6 tube amp and want tighter, more compressed tone then these are for you.
Ca correspond aux descriptions que l'on m'a faites.
Donc, apparemment, les nouvelles Tung-Sol 5881 sont presque aussi bonnes que les 5881 NOS, donc rien à voir avec les 5881 récentes made in Sovtek si j'ai bien compris. Quelqu'un peut confirmer cela svp?
Merci!
