Little gem Mark II Hum problem? any advice appreciated

[rosssurf]

My Little gemMark 2 build, made exactly as seen here//http://aronnelson.com/gallery/TheBigMan-Layouts/littlegem seems to work fine until I put it in it's enclosure. I have wired up an ac adapter that is plastic on the outside. The problem only happens when the speaker input is pluged in AND touches the enclosure. If I leave the other connections ( input and ac adapter) in the enclosure all is fine until the speaker out touches the enclosure.
Please help. Can I just swap the + and - speaker wires?

[rosssurf]

Bump! I can figure this out and thought I would throw it out there again. ..fingers crossed!

[rmo]

Sounds to me like you need to use an isolated output jack. The little gem mkII outputs have to be seperate from ground, if you're using a metal enclosure, the sleeve on the output jack is probably getting grounded through the enclosure. So try using a plastic enclosure, or isolated jacks.

[MetalUpYerEye]

Plastic enclosures are OK for Rubys and LG's. I have both my Rubys in plastic fish food containers and they dont hum, buzz, or any of the like.

[rosssurf]

Thanks Guys! I will try to isolate it