I’ve got mine set to 5ma using a 12v tube, though I didn’t realize it. I had a couple sets of Brimar 12AU7’s that weren’t playing nice with my BHK, I got them warrantied by Upscale.
I’m running a set of current production “Kevin’s Stash” and Cryo Treated Gold Lion 12AU7’s. Each tube section measures identically to the others, which is not something I’ve seen in matched tubes, except for the Kevin’s Stash grade of tubes. They sound great.
But I wonder if the higher jumper setting was at least partially responsible for the problems I was having with the NOS Brimar’s.
I’m running a set of current production “Kevin’s Stash” and Cryo Treated Gold Lion 12AU7’s. Each tube section measures identically to the others, which is not something I’ve seen in matched tubes, except for the Kevin’s Stash grade of tubes. They sound great.
But I wonder if the higher jumper setting was at least partially responsible for the problems I was having with the NOS Brimar’s.