Re: Slide-choke construction

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

Original poster: "Erik Byng" <ebyng-at-knox.edu> 

'evening all.
Thanks to all who replied.  I think I'm getting the general layout.
Many thanks to Patrick, who supplied
http://tesla.reidconsulting-dot-com.au/tesla.html.  That's pretty much the plan
so far, excepting the wire-stripping part.  I've 50 or so 12ga, 50in steel
rods I plan to section for the choke insert.  They should work pretty well
cast in epoxy, maybe a little overage with the casting so I can set a lexan
D shaped handle in one of the epoxy ends.
Dr. R:  You mentioned that you built chokes with spacing for heat dissip.  I
assume that you ment using a square form with risers on the tips of the
square for a rectangular shaped winding.  Or did you propose multiple short
windings in series on the same form with a gap in between each winding?

Removing all dependancy on variacs is good...

Erik

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, May 12, 2004 10:55 PM
Subject: Re: Slide-choke construction


 > Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com>
 >
 >
 >
 >
 > Another interesting advantage using a large sliding choke offers is that
it
 > can eliminate the costly variac altogether!
 >
 > With the core in full, only a few Amps (magnetizing currents) are drawn by
 > the HV xmfr so while it remains at the full 240 VAC it doesn't get any
 > appreciable current so nothing happens.  The xmfr can't supply enough
 > current to charge the caps.
 >
 > As the core is slowly withdrawn the current begins climbing.  You can set
 > the current point at any current level you desire and do not need a variac
 > at all.
 >
 > It's an interesting concept and works very well.  We use this idea to
 > eliminate variacs in all of our larger systems.
 >
 > Dr. Resonance