Improve RFI

@mahler123 said:

 I placed the transmitter -relay device on the floor next to the rack.  Previously it had been on the top half of the rack, and then placed on top of a surround that is wall mounted at near the same height.  The RFI light is off now and the Universal Remote works again.

Me thinks you found the source of the RFI. If you want to verify, I would suggest you place the transmitter -relay device back on the rack. Unplug all the associated A/V equipment from the 120Vac AC mains outlets. Then check for the presence of  RFI.

If you are using a surge protector plug strip, or a power conditioner with surge protection, unplug it as well from the AC mains wall outlet.

.

Good move.

Proper shielding is always a good thing but may not be needed so much or at all  if the problem can be addressed by simply relocating affected components and/or the source of the EMI. 

As previously posted, a Trifield EMF meter is indispensable for finding sources of RFI. Routers with wifi the worst, hard drives and transformers can be pretty bad.

I bought a TeddyPardo power supply for my main system to replace my modem and router power supply.  Gave them the specs and cable info. The power supply  I received has two outlets - 12V the other 19v with 2 different connection types. Came with very high quality cables. Have been sitting on them for some time.  I’ll install this weekend.

I learned about TeddyPardo off this forum. Everything about them is stellar, website, their questions to me to double check info and their unit & cable build quality. Sent photos of the cheap power supply that came with my modem and router. That closed out the loop for exchange of needed information 

I am out of town for a week so I won’t be able to do any more investigations or to see if my new location for the relay is still working.  Will report when I get back.

  I have a follow up question about the mu Metal.  Someone up thread said that it is not to be used around the antenna of relay unit.  My initial thought when it was suggested was that by wrapping it around the antenna it would filter RFI but allow the desired radio frequency of the remote to be read.  I’m just verifying here that this is incorrect (?).  Is the mu metal to be wrapped around the offending source, once identified, of the RFI?  
  I identified a store that sells the mu metal for a few dollars, but it’s in Evanston, an hour drive for me in Oak Park.  The stuff costs 5$/roll online but $30 to ship, so I thought perhaps a drive there and pick the brain of the store staff might be worthwhile, but if I can’t identify the source of the RFI and it needs to be applied to said source then no point