dstroud
Well-known member
Just had both the jj EL34's in my Blankenship Masterplex become microphonic. One worse than the other, but had some crazy static at a gig last night - luckily I always have a backup. A little pencil tapping lead me right to those 2 power tubes. Replacing them immediately fixed the problem, but my replacements were JJ's and I guess I need to look somewhere else lol Suggestions?? TIA