I don’t know either of the products but I do know it’s multi-faceted. (I think that’s true at all levels of expertise.)įinally, I’m not sure this is an area where one can be guided by reviews. They may not provide you with the solution - there may not even be one when connecting to an unknown grounding scheme - but they will certainly improve your understanding and give you a broader framework to work with. They’re also quite amusing, though I shan’t ruin the fun by telling you here, but it’s very “real life”. (If they are not - I should have them here and can send you copies.) They are well-written, clear and are deeply impressive. The other thing I wanted to suggest was to read Bill Whitlock’s articles on the topic which are available on the Jensen website, or at least used to be. Those are a few reasons to go with Jensen there is literally a lifetime of experience dedicated to this one sole problem and presumably many others at Jensen who understand it just as well. It’s an incredibly thorny area, to the point that designers who hear hum, or have it show up in measurements, can be left just as puzzled as you are at the moment. I can assure you that even good (or great) designers, who will inevitably have put a lot of thought into their grounding schemes, still somewhat cross their fingers when they come to connect things up (at least I do, certainly). He understands this aspect of signal integrity so well it’s almost instinctive. It’s what Jensen was set up for with its transformers and what the THAT Corporation was set up to do electronically.

Their head, or maybe one time head as he now also has THAT Corporation, Bill Whitlock, is one of the world’s foremost experts on ground loops and Common Mode noise in systems. The reason I am chiming in is to say a word about Jensen.

I have never had that many sources but I can imagine things are getting pretty complicated these days, even with well-designed equipment.

I can’t remember the last time I had a ground loop problem, and certainly never to the point that I’ve needed a ground isolator, or even a ground lift switch, but it was probably 3 decades ago.

Make a ground isolator