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James,

In my photo folder I have added something you might want to consider.
It is a common item found at most any Hardware store and it's called
a "wellnut". They come in various sizes and I imagine that it could
be used as a cheap feedthrough for electrical purposes. I don't have
an assembled system yet to test the idea but you do! It would work
just like the botttom plug on a small boat. Put it into a hole, pass
a bolt through and tighten it up. The rubber will compress sealing
against the smooth shoulder on the bolt and the (hopefully smooth)
sides of the hole. The pass-through bolt becomes the conductor.

Ken Hunter

--- In VacuumX@..., "James Lerch" <jlerch1@t...> wrote:

To implement such a wiring nightmare might be interesting, but I'm

wondering

if I might be able to mass produce some Ceramic electric pass

throughs.

Something that would just require drilling a hole in the chamber,

then drop

the pass thru in, and seal with an O-ring.. (still working out the

details

:) Anyone ever seen anything like this?