Variac Rewinding ?

Subject:     Re: Latest magnifier results (variac)
      Date:  Wed, 11 Jun 1997 19:34:39 +1000
      From:  Peter Electric <elekessy-at-macquarie.matra-dot-com.au>
        To:  Tesla List <tesla-at-pupman-dot-com>

Tesla List wrote:
> Subject:  Re: Latest magnifier results (variac)
>   Date:  Tue, 10 Jun 1997 23:58:20 -0400 (EDT)
>   From:  richard hull <rhull-at-richmond.infi-dot-net>
>     To:  Tesla List <tesla-at-pupman-dot-com>
> snip
> >>

> >
> Dood man Bert!  Most folks would throw up their hands at a fused
> variac.  I
> place a turn around value to begin with 20amp units and above.  Smaller
> units can often be purchased cheaper than the labor and hassle of
> repair.
> Plus the big 'uns give us folks with 5 thumbs on each hand a chance to
> really stand a chance.  5 amp jobs are for watch makers!
> Richard Hull, TCBOR

Richard, I have scored a large variac rated at 100V input (I think its
from Japan) and 20A output. Its not much use to me here in Aus because
we only have 240V mains but you mention repairing these units. Would it
be feasible for me to re-wind this unit with thinner wire and more turns
for 240V operation?

If so, how easy is it to wind wire neatly round a toroidal core?
Any help would be most appreciated.


Peter E.