EMI FIELDS

A correction to my post of 2 minutes ago. With regard to the wrist strap, for your application do not attach the wrist strap to the chassis of the unit. Rather attach it to ground at some other point. Of course you really don't need the wrist strap, just discharge yourself by touching ground at some point other than the chassis before touching the chassis (obviously this other point needs to be physically within reach without walking across the carpet again).

Musicnoise, exactly correct on all points.

I was getting a buzz through my goertz interconnects from my pre to my amp as they passed by the back of the TV.
Here is what I did
First I moved the cables as far away as possible (there was still a slight buzz). So then I bout a sheet of “Shielding fabric” a polyester cloth available with a copper and nickel coating.
I used the sheet of the copper and nickel shielding and draped it over the back of the TV and the buzz in my system was eliminated and believe this or not it made the TV picture more sharp.
(I did move the interconnects away from the TV but still was getting the corruption). My question is, will this need to be grounded?
It is not touching any metal that I can see. But it is up against the TV back where I discovered the EMI was coming from and like I said it really worked, It seams you know your stuff and I thought this is a question for you.
Thank you from Mario

What you did was stop the interference by shielding the source of the interference rather than shielding the part affected. This is the preferable solution in the case where you have identified the source. From a practical standpoint, if it works as is - no it doesn't need to be grounded - you have achieved what you set out to do. If you continue to have problems, ground the conductive sheet. The question then becomes how to ground it - at one point or more. In your application grounding at more than one point should not be a problem as you aren't going to be concerned about ground loops. But, since you have solved your problem, I would not go any further. I am assuming that your interconnection between the amp and preamp is not balanced. If you the capability of using balanced interconnects then you may want to do so and thus be able to remove the conductive sheet you are now solving the problem with. If you do so, attach only one end of the shield of the interconnect to ground - at the preamp end.

Imnewton: A good source of information for shielding and grounding is "Noise Reduction Techniques in Electronic Systems" by Henry Ott. I had his first edition on my desk for a decade and bought his second edition after that. It is not a new book (copyright 1988 for the second edition) and I don't know if he has a third edition. It is practical and not math intensive- a basic high school math education with an understanding of logrithms and introductory calc is more than enough to understand the explanations, and even that is not essential.