It takes about 30 seconds to check for a tube that is arcing. Just knock on the top of the tube. That's the time-honored tradition since there have been power tubes.
Problem with my Atma-Sphere M60
Hope someone can help me out on this. My amp is 6 months old and one of the monoblocks stopped working. The amp has three fuses at the back. One of the three appears to be blown (its the third fuse closest to the right edge of the amp as you look at the back of the amp). I can really make out what kind of fuse it is. I think it says 5A 230V, but not sure if it is the slow or fast blow kind. Anyone have an idea? Could I find this at the local electronics store (Best Buy or Fry's)?