I dunno-Some Chinese tube I guess... Paul @ 2B said it's tough to improve on the stock tubes. I think he mentioned an Electro Harmonix el34 that worked well in the output stage. The stock 12au7 were good - and the JJ tesla ecc83 for the 12ax7.
Ive really been enjoying the amp as is and am leery of touching it ;-) I restore and mess with old motorcycles, and the worst damage I've seen has been done needlessly on 'upgrades' or 'fixing it'. If it ain't broke...
Ive really been enjoying the amp as is and am leery of touching it ;-) I restore and mess with old motorcycles, and the worst damage I've seen has been done needlessly on 'upgrades' or 'fixing it'. If it ain't broke...