Re: variac rebuilding

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

Original poster: Yurtle Turtle <yurtle_t-at-yahoo-dot-com> 

Be careful. Several of my variacs look to have been
silver plated on their contact surfaces. You may sand
that away if you aren't careful. I'm not sure if it's
silver, but it appears to be some thin layer. I've
carefully used a scotchbrite pad, but could have
easily worn the plating away if I wasn't looking for
it.

Adam

--- Tesla list <tesla-at-pupman-dot-com> wrote:
 > Original poster: Ed Phillips <evp-at-pacbell-dot-net>
 >
 > I've found that #600 wet or dry carborundum paper
 > words very well at
 > cleaning up variac contact surfaces, as does
 > Scotchbrite or even steel
 > wool (if you're careful to leave nothing behind).
 > Even a pencil eraser
 > works at times.  Unless the windings have been fried
 > there is absolutely
 > no reason to consider a rewind!  I've managed to
 > replace a few turns
 > that were burned due to brush arcing but beyond that
 > I think is foolish.
 >
 > Ed
 >
 >