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The Ideal Sure Test Circuit Analyzer 61-165 will detect "bootleg grounds" greater than 15 ft to the panel or device.Any tips or tricks for tracking down the source of what I think is ground loop noise?
Working on a high end home theatre, and the speakers have a subtle but noticeable annoying buzz in them. A professional A/V guy is doing the project, but has asked for help tracking down the source.
Bootlegged ground(s)? Bonding screw not off in a sub panel?
I really have few ideas of how to track it down. Won't be back there until next weekend, but want to spend some time this weekend learning about the problem.