RE: differential probes

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Mccauley, Daniel H by way of Terry Fritz <teslalist-at-qwest-dot-net>" <daniel.h.mccauley-at-lmco-dot-com>


Thats a very poor idea.  Any arcing between traces will quickly
"carbonize" the FR-4 board and this carbonization
will become very conductive.  Even underlaying material which does not
appear carbonized (for example, after cleaning
board) is still somewhat conductive.

Dan


 >      Hi All!
 >      Just a thought here- This spark gap section could really
 > just be part of
 > the PC layout: Route the potentially high current signals
 > with maybe 10 mil
 > tracks, separated from each other by an inch, but "T" off a spark gap
 > between these tracks. That way an arc will occur in a
 > controlled spot on the
 > board and the feeding traces will be small enough to vaporise. Should
 > provide an easy to make fuse, but I guess the board would
 > need a lot of
 > rework between accidents ;)
 > db