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RE: Variac rebuild



Original poster: <tesla@xxxxxxxxxxxxxxxxxxx>

The other trick is to not try to wind an variac by hand. Nobody makes them
by passing spools of wire though the hole hoping everything lines up.

If you can make a toroid winding machine, now that's useful.

KEN

On Sat, 5 Feb 2005, Tesla list wrote:

> Original poster: <sparks@xxxxxxxxxxxxxx>
>
>  > I got around to trying to wind the variac, and there is a problem: no
>  > matter how hard I try, I cant get the wire on the inside to form two
>  > layers.
>
> <snip>
>
> The trick is to start by winding the first two turns side by side
> through the center hole and then let the third turn lay in the "V" space
> atop the first and second turns.  The forth turn then lays parallel to
> the second turn, and then the fifth turn lays against the third turn in
> the "V" between the second and third turn.
>
> Kinda' like this:
>
>    3 5 7 9
>   1 2 4 6 8  and so forth...
>
> Needless to say, you have to keep the wires tight against the form.
> IIRC, the manufacturers use a toothed insulating cap on the ends of the
> core to space the wires correctly.
>
> 73,
>
> Ralph   W5JGV - WC2XSR/13
>
> My Amateur Radio files and Rife Project files have a new home!
> http://w5jgv.com
>
> Visit my other web site at:
> http://www.spectrotek.com
>
>
>