Built a junk box guitar amp. http://monster.partyhat.co/article/micr ... mp-R2B.pdf
12ax7 feeding a 6aq5. See attached schematic. The only changes i made were the 5.6K to the 6aq5 is a 5.1k and the power supply is a full wave since the transformer i had was not center tapped. the buzz goes away when i short the input. What am i missing?