Noise problem...

[crawler486]

I got 5 cloned effects in one enclosure being supplied
by "9v Ultra Clean Power Supply" from GGG.
I'm just wondering why there is a very noticeable noise swell
when I put the enclosure to the ground. The enclosure
when placed on a table has an acceptable level of noise.

The base of my enclosure is made from plywood with
aluminum sidings and top cover.

Any idea?

Thanks.

[Travis]

Shield the bottom. Use foil, fine meshed screen, whatever.  Report back after that.  If you only want this pedal for bedroom usage, you might be fine; but I'd definitely shield it for gigging.  Clubs have a nasty habit of actvely wiring in an unpleasant, aggressive manner.

[crawler486]

Shield the outside bottom, or the from the inside?

[Travis]

It doesn't matter, as long as the circuit is completely enclosed, and the entire shield is grounded.

You might also try to find out what is causing the interference.  There is a spot in my house that has so much crap in the air that I can't run any signal near it, shielded or not.