Help modifying a variac?

From:  Alan Sharp [SMTP:AlanSharp-at-compuserve-dot-com]
Sent:  Friday, April 10, 1998 5:20 AM
To:  INTERNET:tesla-at-pupman-dot-com
Subject:  Help modifying a variac?

>Message text written by INTERNET:tesla-at-pupman-dot-com
>Does anyone have directions on modifying and using a variac (cutting the
>core) as a current limiter?  Also, what size variac would be needed for
>a 2kva potential transformer.<


I use a variac as is, but in series with a couple of microwave oven 
transformers with the secondarys shorted out. It holds my current
to about 10A - details and pictures on my web site. The variac alone
unmodified won't work because it saturates but the transformers 
include current limiting shunts.

Have fun,

Alan Sharp UK