"What tubes have you tried and liked in your Primaluna ? "
bigred71-
PL HP user- over the years, I’ve settled for NOS 6l6G.
Note that it is NOT similar to the current, 6l6GC type.
6L6G type(pre 70’s) were a lower operating voltage tube.
A compromise of KT88 bass with a "close enough" EL34 mid/high’s
Still "reasonably" priced for a genuine NOS power tube.
Edit- "Genuine" NOS can be a dice roll relating to pedigree. Many listings are "pulls" disguised as NOS. I've had good luck with Brent Jesse.