[codefox1]

Agree with all, but never bet your life that the recepticle on the wall is wired correctly. Even a 3 prong grounding plug can present a hazard with any transformerless set, but you can usually get rid of the grounding capacitor(s) after connecting the ground wire to the chassis on sets with a floating B-. A safety (fail open) capacitor wired after the switch between the neutral and hot wires of the AC line usually gets rid of noise. I also agree that fuse is great idea, and no matter what, I never touch these chassis when power is applied. Never!