Re: Variable AC control from Harbor Freight

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>" <evp-at-pacbell-dot-net>

Tesla list wrote:
> 
> Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<jimlux-at-earthlink-dot-net>
> 
> Almost certainly a form of triac speed control.  Essentially a light dimmer
> in a different package...  Given the highly non-sinusoidal output waveform,
> it probably isn't too great for a NST.
> 
> The giveaway is the "universal motor" thing..   A phase controlled dimmer
> will vary the speed of these quite nicely..

	Add to that "WON'T WORK AT ALL WITH AN NST"!!!!  Those controllers rely
on the counter EMF of the motor for speed feedback, and with an NST or
other transformer "there ain't none".........

Ed