Рет қаралды 176,019
Finding a bad tube in a Fender Custom Shop '57 Twin Amp. The amp was sounding harsh and noisy while overdriven, so I needed to see if the tubes were the problem. The amp sounded ok when clean, but when overdriven by either a overdrive, fuzz, or uni-vibe pedal, it would sound harsh. Problem was two microphonic preamp tubes in the preamp section.