Did you buy it from the guitar center in Towson md? I noticed the same problems in their herbert there. I told them to fix it! The one sales guy said they sucked and i played it and realized that there was definitely something wrong with me. They know nothing. And seriously... Why are all these herberts having issues. The one i played in Washington music also was making noises and everything. i couldnt even play on it. I drove an hour to try out guitars and couldnt use the amp i normally play on. and its only the herberts. ...what is the deal? Before buying mine, it had issues to and i had them fix them, and now it works great. But why so many tube problems. No other tube amp ive ever had have i seen this ...