Bottle Rocket
New member
I have an issue after using a 12au7 adapter for a 6sn7 tube. After turning my amp on with the adapter and tube in (and with the headphones plugged in), I heard a loud buzzing coming from my headphones. I turned off the amp and when I turned it on again with just my regular 12au7 tube, the right channel was out and then both sides started buzzing (very loudly). I checked my headphones separately and they're okay, so I'm guessing I may have blown something in my Crack. Any ideas what could be wrong?? (My amp is upgraded with speedball and output caps and everything worked fine before trying out the 6sn7 tube with the adapter).