Re: Home Made Variac
you're not gonna save money by building your own. A $15A
110V variac goes for $30 surplus. The only place you will get a variac core
is out of a variac, and if you've got a variac you don't need to build your
own. If you're really skint then try to pick up a burnt out variac for
nothing and then rewind it.
To build a variac, on a one off basis, for less than $30 is near to
impossible - they cost the manufacturers who turn out hundreds of them,
therefore get quantity discounts on all the materials, at least $60 to make.
If you really can't afford it then use the multi taped auto transformer
> Original Poster: Luc <ludev-at-videotron.ca>
> Tesla List wrote:
> > Original Poster: "Michael Novak" <Acmnovak-at-execpc-dot-com>
> > I can't afford to buy a variac but I need some way to vary the line
> > voltage... So, I decided to build one. I'm pretty sure I can get my
> > some 10 guage magnet wire, however, I still need to find a suitable
> > a variac basically a bifliar-wound 1:1 turns ratio transformer? If so,
> > anyone have some sort of formulas on the subject? What would be the
> > disadvantages of having a core which is not laminated such as the kind
> found in
> > transformers?
> > Any thoughts?
> > -Michael
> I'm sure you could do it i think of that befor i find 2 *15 amp variac
> at good
> price ,you probably can find some iron sheat iron in your community
> (metal shop)
> you need silicon steel.May be someone on the list can give you de
> dimention of the
> core for the power you need and dont forget to varnish your sheat metal
> befor you
> role it ("eddy current "or some ting like this).
> Luc Benard
> P.S.Excuse my english.