Thank you antigrunge2. Everything is in the attached garage, modem, router and this station system to extend wifi. Meaning the main station extender and the slaves are positioned around the house for better wifi.
The router is plugged directly into my fuse box. I have outlets built in. I can see from the wire pile up and the proximity, as well as the use of, the fuse box could add to the noise.
I just started to read about your suggestions. Pink Faun is produced in the Netherlands, which is very close to me. There is also a dealer I found in Germany. It diffently sounds like I need to add some type of filter post router and a filter converter to fiber. Then a fiber cable to the streamer/DAC. That was green computer's solution as I understand so far.
As I said, I am still looking at Lan isolators. I do have to say, this is quite an interesting science.