🚀 go-pugleaf

In article <9210091338.AA09052@slc10.INS.CWRU.Edu> ah335@cleveland.Freenet.Edu
	(Richard Banks) writes:
>I have a plastic housing to put my circuit into but I'm worried about
>RFI interference.

There are spray coatings, both conductive and non-conductive just for that.
My electronics catalogues are all out of reach and I cannot recall
the names of the manufacturers
(I think Stephen-Miller specializes in cleaning solutions only).
Just look inside any plastic computer case (the Timex/Sincalir 1000,
the AT&T Starstation, Sun desktops among others)
and you'll find an aluminum coating inside the plastic.
It was sprayed on and can be done well after the manufacturing.
I even recall black fuzzy/matte finishes to attenuate high frequencies.

The real trick is in sealing the holes and edges from RF leakage.
Unless the lid has a good overlap/lip, you'll need RF sealing stuff
such as conductive gaskets or springs.
RF will leak through holes such as indicators and switches
and of course, any wires into the box.

- Jeffrey Jonas
jeffj@panix.com
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-- 
Jeffrey Jonas

jeffj@panix.uucp