Fusion Message Board

In this space, visitors are invited to post any comments, questions, or skeptical observations about Philo T. Farnsworth's contributions to the field of Nuclear Fusion research.

Subject: Re: various instrumentation and parts questions
Date: Jul 05, 8:07 pm
Poster: Jim Lux

On Jul 05, 8:07 pm, Jim Lux wrote:

> I have. How much voltage can those things take? Are things like truck plugs etc rated for higher voltages?

Virtually all sparkplugs are "rated" for the same voltage (actually, voltage rating isn't really an issue for spark plug design.. More important is the thermal and wear characteristics.).

> I take it you just weld them into a flange and away you go, or is there something more? I also want to figure out how to make coax feedthroughs for instrumentation.

You're probably stuck buying (hopefully used or surplus) hermetic coax feedthroughs, which you then typically install in a blank plate by bolting and gasketing (or some suitable adhesive). They are pricey, though....

How good of an impedance match do you need, or are you just concerned about shielding?