Reducing noise in an Ethernet over power configuration

I had a weird noise in my network.   It went away when I disconnected my TV ethernet cable from my switch 

I actually thought it was a bad tube.  Took them out, tested .   Noise persisted,  I tried another set of tubes.   It was driving me insane.  

Then I started isolating upstream and when I pulled the CAT 8 cable out of the switch the problem went away.   

Someone on this forum mentioned CAT 8's metal shield can cause noise.   They were right.   I just switched over to WiFi but I am going to try a CAT 6 this weekend.   It sounded exactly like a noisey tube , random , come and go and vary in intensity 

“High quality streamers take care of any shortcomings.”

@ghdprentice 

I beg to differ, check out what Taiko has done lately to eliminate noise from Ethernet….I can’t imagine anyone feeding Taiko off PoE 😳

You could try iFI silencer and see if it helps. Personally I would avoid PoE at all cost, why add more noise only to remedy afterwards. Instead, try mesh network pods (you need two, one next to router or modem and 2nd receiver near UltraRendu). 

I would recommend a wall wart wifi extender. Ethernet over power is not a good solution. 
 

I use this solution and a know of a number of outstanding high end systems (>$150K) using it. High quality streamers take care of any shortcomings.

Maybe a switch where some ports are PoE and some are unpowered 

I have a TP Link Ether over AC adapter going into a TP Link fast switch with SFP ports.   From the switch I use a TP Link media converter via fiber optic to a media converter next to my Aurender.  From there into the Aurender.   Dead quiet.   

I had a similar Ether over AC adapter by Netgear and determined that was the cause of my noise.  Got the TP Link version that was 2 x as fast and it's super quiet.