Building the Audio Note Kit 1 SET amp...

I also agree with Jwm concerning the Ken-Rad VT-231. For all the positive things I've read about them they are VERY microphonic in my experience and for the prices asked are not worth it. But if you INSIST I will gladly sell you a pair at a reasonable price, after all, they still "test" well. The Sophia premium tubes ARE quite expensive but IME the best 6sn7 tube I've listened to in both the output stages of my preamp and Oppo Modwright, linear and superb extension, in other words more accurate, natural with a bigger sound at least to these ears. It always depends on what floats your boat. The RCAs and some of the Sylvanias (brown base) are excellent as well. If you purchased from Andy believe me, you purchased quality tubes. The things he tests for, microphonics, noise, transconducdence, gas emissions and life are ultimately of greater importance overall than antedotal comments from some.

Mikirob:
Happy to share the info. It's this fellow. He just happens to be local to me.
I think I'll stay put with the RCA tube I have now. My next upgrade will probably be one of the Pangea power cords from Audio Advisor. I'm still using a cord cannibalized from a old PC! :-P

Rebbi,
Your amplifier is worthy of much more than an old PC cord. Even though you are quite please with the sound quality you are currently receiving, this generic power cord is limiting your potential significantly. You'll be surprise what a higher-quality power cord can do for your amplifier.I would recommend that you consider purchasing a high-quality used power cord, for example Coincident, VH audio or Triode Wire etc. these are great value buys especially used. This level of quality power cords will noticeably increase the overall sound of your amplifier, they do make a difference.
Charles,

Charles,
I know that speaker cables can make a difference because I have heard the differences myself. I will admit to having been a little skeptical about the whole power cord thing but I will certainly give it a try.
By the way, do any of you guys know anything about Silnote? They have some power cords for sale here at very reasonable prices.

Rebbi, I agree with Charles you can do much better then the Pangea. Buy used, Triode Wire Labs cords are very good. Pete (TWL) might have some used ones. He is great to deal with or look on Audiogon.