had to get new plugs and wires for my truck and now im getting noise . i used good plugs (autolite double platnums) and good wires (autolite pro-fit) that should be more than adaquate for my old truck . anyhow im looking at this home made noise filter ....... San Antonio Hams and he says its good for 20 amps . was wondering if anyone knows and cares to share how to build one to handle 50 amps or more ??? thanks .