[Prev][Next][Index][Thread]

Re: Cheap Variac Substitute?

Tesla List wrote:
> 
> Original Poster: "B2" <bensonbd@erols.com>
> 
> Hi All,
>     I recently got a catalog from Eagle America tools.  On page 49 is a
> router motor speed controller rated up to 3 1/4 HP or 115 Volts/15 Amperes.
>  It is on sale for $34.99.  The part # is 421-1300.  Web page is at:
> 
>  http://www.eagle-america.com/
> 
> Question:  Has anyone tried this particular unit successfully on a Tesla
> coil?  Did filters improve the performance of this unit (aka prevent it
> from being cooked)?
> 
> Cheers,
> 
> Barry
> 

	Probably won't work at all.  Those units (at least most of them) are
intended to work with universal (AC/DC) motors, and depend on the
counter emf of the armature for speed sensing.  With a transformer there
won't be any real counter emf, so control will be wacked up.

Ed