I've ran blackboxes, wire lines off an aluminum hull...fooled around with adding metals to the d-ball.......also using dissimilar metals on spoons etc.
Bottom line for me:- don't think it makes any difference...unless you have some glaring voltage problem that needs correction.
The idea is that the magical voltage attracts fish from far and wide. But in the next breath they tell you that if your lure is 20ft or more back of a wire line or gizmo.......the effect is null and void.
So how can you attract fish from far and wide when it's ineffective outside of 20 feet....?
I didn't catch any more fish using wire and blackboxes than I did using braid.
If there are two different metals down there....no matter how tiny (like swivels, hooks, lure body, connectors etc etc etc.)..you are putting off voltage of some kind. Whether it's good or bad you'd have to test to find out.
A normal uncoated downrigger ball which uses brass or copper wire (or any other metal) puts off voltage by itself. I use uncoated d'balls and it hasn't stopped me catching fish regardless of what voltage is coming off them.
The Gold Super Betsy flasher is designed,they say,to emit voltage. Personally I think it's the color of the flasher that works....not the voltage (whatever it is) that comes off it.
It's true that when you combine stainless hooks with certain metal-body spoons you get a voltage reaction off the spoon. Don't ask what it is .....I have no idea.
I don't like stainless hooks so I don't run them.......but my spoons still work.
Bigger Chinook are more sensitive to voltage than smaller Chinook.
I have heard reports that the LureCharge actually works......but I have heard reports that a lot of stuff works for catching fish which I won't be rushing out to buy anytime soon because in my case it's "if it ain't broke don't fix it"..........but to each his own though.