Re: DC rotary gap?

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

Original poster: "Gregory Hunter by way of Terry Fritz <twftesla-at-uswest-dot-net>" <ghunter31014-at-yahoo-dot-com>

Have you thought about using an angle grinder?  I used
a cheap ($20) Chinese angle grinder with the rotor
disk built up from a stack of unclad PC board stock. 
It was cheaper than dirt and the RPMs can be varied
smoothly using an ordinary dimmer switch.  The angle
grinder already has a 7/8" arbor on it--just chuck
your rotor on there and go.  You can even change
rotors as fast as you could change grinder disks, in
case you wish to experiment with different numbers of
flying electrodes. I've seen 10,000RPM Chinese angle
grinders as cheap as $9.99 at those fly-by-night truck
sales.

Cheers,

Greg
http://hot-streamer-dot-com/greg

> I am glad you recommend a dc motor, i would hate to
> have to 
> breadboard a VFD just to get the speed range I want
> :)
> Do you recommend smoothing the bridge output at all?
> I suppose 
> driving a motor is a non-critical load.
> Thanks for the information!
> Greg
> ps- does anyone have a recommendation or a web link
> to a cheap hv 
> probe (or plans for one) to add on to my multimeter?
> i need some way 
> to match up my mot's other than core size :)
> -- 
> 
> ____________
> ICQ 95403614
> 
> 
> 


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