Hello! I have some problems with my amp, and I guess the right people to ask is you!

/watch?v=B6WmLM8YNmQ - a movie in which I demonstrate the problem..

As you can hear/see in the YouTube-video, there's some noise going on when I'm not playing. When you play a C-note (on the E-string) on the guitar, the noise becomes even louder.. wierd...
You can easily stop it by moving the amp a little bit. It's not always like this? I bought about a year ago, maybe some new tubes will do the trick?
Last edited by Wickerman___ at Oct 11, 2013,