Curious if you went ahead with the 150s. I have a 3502p myself--bought it a year ago. Swapped out the stock Tungsol 6550s with GL KT88s--great improvement. Considering a quad of KT77s.
But man, I have developed QUITE the collection of 12ax7 and 12at7s and all their variants. :D
But man, I have developed QUITE the collection of 12ax7 and 12at7s and all their variants. :D