Question to 6L6 tube experts

Thanks Mikirob for the thoughts.

I'll be in touch with Jim McShane.

Just an FYI to anyone else who may stumble upon this. Here is the article where Jeff Day talks about the Russian 6N3C-E (6P3S-E) tubes.

http://jeffsplace.me/wordpress/?p=188

Jim McShane's website. It differs from the one mentioned in the article.

http://www.mcshanedesign.net/

I use new Gold Lion kt66 in my Eico's and they are wonderful.

I didn't think KT66 tubes were an exact replacement for 6L6GB tubes. Thanks for the lead Mcgarick. I'll have to do more research.