Seeking Advice on Eliminating Hum and Improving Audio Quality

I see the tester kit has a three-light device.

Screen Shot 2024-07-12 at 11.33.52 AM

It also seems to have a button, so jury’s out what that does.

Also see: You just touch one of the connections and the noise goes nuts.

Koz

its a GFCI tester.

Ground Fault, yes, so is mine. But mine doesn’t have a push-button.

Manufacturers never miss an opportunity to add “features.”

Koz

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