So I tried tinned copper shielding with a ground wire but that did not accomplish much.
so I just went for it. I got some WTB connector, silk tubing, copper tape and reused the tinned copper braided shielding. I cut the RCA I liked up and made my own.
Construction was pretty much as follows:
wire connected to interconnect, silk tubing, copper tape around silk grounded to WTB connector, tinned copper braiding, with another layer of copper tape around that, and finally a plastic mesh cover.
As far as I can tell, the sound Is the same, but without all the noise. So I’m going to call it a success.