Tim Shoppa wrote:

snip
Aluminum chassis are available ($10-$30 range depending on size) from
www.digikey.com, www.mouser.com, www.tubesandmore.com, etc.

Kitchen pans/baking trays can be surprisingly effective as well for a
lot less money.

A good hardware/welding store will have aluminum sheet and extrusions.
Home Depot etc. really suck in this area.

Also, consider having enclosures made at a local sheet metal shop
(heating, cooling, ventilating); I've had them done for _very_
little money out of galvanized, and you can solder to them.

Regards,

Michael