[@marko@]

well what he said improved it the most was removing the total amount of items the ACjr controlled, he moved them to the computer to control (with X10 signals).
noise is when some appliance, while electricity is going through it, sends back occasional wavelengthes with a different height of the wave (i forget the name), they may send lower troughs too, but i dont know. so he put a dozen filters on the different stuff that makes noise.
my suggestion is just keep 10 items or less on the ACjr.