6SN7 suffixes

Fatparrot, when I first got into the 6SN7s I did exactly what Charliee is suggesting. Andy has breakdowns of all the tubes he carries with some nice brief descriptions.

Fatparrot, I was waiting for more experienced users of the tube to chime in first, but since no one has yet, I'll post.

Did you want to know what the actual GT, GTA, GTB, W, VT-231 designations mean or were you more interested in their sonic characteristics?

I've been rolling different 6SN7s in my Blue Circle preamp for over three years. I don't actually know what any of the suffixes stand for, but I have learned some of the tonal differences and which ones I like more than others.

I've found that the different manufacturings such as Sylvania, RCA, Raytheon, Ken-Rad, Tung-Sol, etc... all have their own distinct flavors as well.

I really like the Sylvania VT-231s as well. I don't know anything about the differences between the metal base or chrome dome versions though.

One tube I've really enjoyed the last few years is the black glass Ken-Rad VT-231. Many of the same attributes as the Sylvania, big soundstage and great extension, but the Ken-Rad sounds more organic to me and that was something I was looking for in my system.

Thanks for the pointer Nutella!