Your noise is created because you are using a power supply that does not have isolated outputs.
CPU noise and hash then enters the signal chain. Cheap multi supplies are famous for non isolated outputs.
If you need to use such a supply the fix is an isolator adapter
With multi supplies you have to be careful as often the outputs are not isolated. That can cause noise between digital pedals. If that happens you need to use the original supply on the pedal with noise OR get a isolator plug like the one made by Diago PS-09
We are working hard to now build our pedals to work with these cheap supplies. here is the Diago plug
Thanks for the response.
Not necessarily. I started out with a non-isolated Pedal Power (the kind with the string of branching-off 9v adapters. I got the noise there.
I then got a couple of more expensive isolated ones (the kind with the metal box, and isolated plugs on the box for 9v’s, 12v, 18v. I still get the noise from EHX pedals (and none of my other pedals). What fixes the problem: using an EHX 9.6v adapter separately. As I said, I don’t like doing this because it’s a lot to plug in several 9.6 adapters which take up a lot of plug in space, too.
I don’t know about the repeated reference to “cheap products EHX is trying to now work with.” There doesn’t seem to be anything cheap-quality about any of the power sources I’ve used. And none of my other pedals (BOSS, TC Electronic, Walrus, DOD, Dunlop, Digitech) cause this problem.
Could it perhaps be to do with the miliamperage, not the 9.6v thing? I don’t know enough about electronics to know.
Thanks for the link to the Diago plug. I’ll check it out, although of course using some special piece of equipment to use a pedal might not be considered ideal by many. - edit. Wow, 33 bucks each? So 120 bucks plus taxes and shipping to use my 4 EHXs.