I have been a ham for 39 years. I just installed the ISOX in line RF isolation Transformer UNUN made by RasioWavz has reduce RFI BCI and White noise at my station.
You need to keep the ground strap end to the chassis. I had connected the ground strap to my shielded ground. All of my 20 over 9 BCI on 80 meters disappeared.
White noise had dropped off by 1S unit and had reduced RFI on the TV in the shack.
Not sure if I can post their web site, it is at
http://www.radiowavz.com/ The ISOX and baluns are well designed and made well. I recommend their products to any one.
Keep The Faith, Jim K9TF