Best 12at7a, 12au7a?


NOS or Ei? Thanks. I would like to hear what are you using and where is best place for purchase? Thanks
ssing240be
I hear RCA cl 12AU7A, to be best USA "valve", and word Telefunken diamond bottom, goes around as THE best 12AT7, for around $450 a piece!
Only you can make that decision. Get lots of tubes and try all of them. They are not that expensive and you can get them on say E Bay. I tried some Mullards in my preamp with very disappointing results. These same Mullards worked beautifully in my power amp. I find that Tesla work great in my preamp.