Gray-ish thing in an amp ?

[The Crimson Sunset]

I'm currently making a headshell for my mark IV ...

On this forum I did a search to find picture of other custom headshells made by other people.
I found a good picture, and there was something that caught my attention. Something gray-looking. :

What is this gray thing ? and what it is used for ?

thanks !!!

 

[MrMarkIII]

That's metal foil glued to the inside top. It shields the open top of the chassis.

 

[Don]

Fender used to use a piece of screen stapled to the inside of the top.

 

[Boogiebabies]

Ufologists use it to keep Aliens out of their head. Some use it to keep the voices out as well.

 

[trickyrick]

If you can't find a sheet of foil localy, go to your local home center to the ductwork dept. You can get a roll of foil tape and put a few strips down. It comes in 2" rolls and is inexpensive. The adhessive is really strong as well.

 

[stokes]

Just get heavy duty aluminum foil,the kind you find in the kitchen,some 3m Adhesive spray will hold it in place.Make sure it makes a physical contact with the chassis or it will become an antenna for RF noise,and electrical interferance.