Homebrew PCBs

So what?
If you notice corrosion you can just bring the oven back to the junk place  
and take another with you.
(Keep the transformer if you don't have a battery spot welder yet).

Microwave ovens are usually free, because they are dumped when still quite  
easy to repair. The fan blows air into the electrical compartment (usually  
right) and through the cooking chamber, and out the other side. The dirty  
air does not touch the electrics (it is designed that way to keep food  
dirt off it). So worst case it'll start to rust somewhere...

FeCl doesn't gas much, i would not heat cucl, ever, microwave or not.

ST


On Sat, 19 May 2007 02:26:27 +0200, Roland F. Harriston  
<rolohar@...> wrote:

> I hate make harsh comments on any public forum,
> but I think that heating ferric chloride in a microwave
> oven is sheer insanity.
> The outgassing of fumes will attack and destroy all
> metallic circuit components in or near the oven, including circuit boards
> copper (and aluminum, and steel) wiring, etc.
> I don't  think I've ever, in my 40plus years in the
> electronics biz, every heard of anything as bazaar as
> "cooking" an etchant in
> a microwave oven.
> Sorry for the rant,  but I just can't let this one
> go by without moaning and groaning.
> Roland F. Harriston
> ********************