Grounding boxes - The real deal

[Marco]

Well, the claim is that the box removes RFI. We know now that RFI is across the spectrum so you can't measure all of it but if you can inject RFI into the environment in some band that is measurable, then you can measure it - or the lack of it after use of the grounding box.

Sorry, I'm afraid that's only your supposition, based on assumption, not fact. The key is in the word "claim".

You need to be *certain* how the product works, and that you're measuring for the right thing (i.e. the phenomenon you're attempting to prove exists, or the opposite), otherwise you can't use those measurements as proof of that, or of the efficacy of the device in question.

Marco.