I picked up a SIG:X recently and the tubes came broken unfortunately. I read a while ago that Fryette said to use sovteks but they've been discontinued. What's a nice pair of KT88s right now?
My Sig x was serial #8, and it came with sovteks. But I alway mess with tubes so I ended up liking the shuguang kt88-98 the best, and they don't break the bank.