Firebottle Kt88 tube rolling

[Isaacc7]

Because the KT88 Firebottle is a tube roller's dream I think it deserves its own thread. Too much info is buried in the monster thread, I hope this will be a place to share experiences with this particular amp.

My amp came with a Sovtek 5ar4, PSVane Kt88 Treasure, and a GE 6sn7. Out of the box my system (Topping D90, Schitt Freya+ passive mode, and Phase Technology PC 3.5 speakers) sounded very clear and open if just a bit hi-fi-ish. I have gone through a ton of tubes since. Here we go...

Yikes! This got really long. I'm going to split up the input and output tubes across a couple of subsequent posts.