[Steidl Guitars]

Hi All,

Apologies for a newbie question.  I'm assembling my first amp and drilling holes in a steel chassis that I salvaged from an older computer device.

Do I have to ensure that the threaded posts that pass through the chassis do not come in contact with the chassis? 

The manufacturer of the parts provides washers that might be there to isolate the front and the back, but not the post itself. 

Posed another way, do I need to drill the holes large enough to ensure that the threaded post does not contact the chassis?   

That's all worded horrifically, but I hope it makes some sense. 

Thanks,
Bob

[Niteshade]

I think it's better to drill large enough to use the washer. That way you can find a quiet ground for them.

[Steidl Guitars]

Thanks for the quick reply Blair.  The washers fit front and back, and I will use them, but there is nothing surrounding the post as it goes through the chassis.

Here's a pic:



The red and white washers isolate the front and back, but not the threaded post. 

Is it okay for the post touch the chassis?

[Niteshade]

One of the white washers should be flat on both sides and the other should have a small extension on one side, made to fit into the hole. It's not much- maybe 1/16th of an inch, but that's all you need. It's more of a guide so the RCA's don't rub against the hole's sides.

[Steidl Guitars]

Great, thanks, I hadn't noticed that.

That also tells me that the post has to be isolated from the chassis, which makes sense.

Thanks again.