Re: ballast

[Tesla list <tesla@xxxxxxxxxx>]

Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>


We stock them.

Thanks for your good wishes.  You building any real big DRSSTCs these days?

Dr. Resonance


 > Where can one find two 10kVA Supercil grade C cores?
 >
 > Anyways, glad to see you back on the list.  Hope you are feeling better
and
 > make a full recovery!
 >
 > Dan
 >
 >
 >  > You can use two 10 kVA Supercil grade C cores strapped together with
 >  > stainless steel strapping (don't use steel or iron).  Cross section
needs
 > to
 >  > be approx 3 1/2 x  4 inches depending on the power level you intend to
 >  > operate.  These cores are gapped with plastic or Nomex on both sides at
 > .080
 >  > inches.  Total inductance required is around 140 mHy if you are running
a
 >  > variac for voltage control.  This requires approx 120-130 turns of 8 to
10
 >  > AWG wound on an insulating box around the core.  Don't use 12 AWG as it
 > will
 >  > overheat because the core is bumping up against saturation on it's
current
 >  > peaks.  Also a good idea to a small 100 CFM cooling fan across the
reactor
 >  > windings.  Space wind the windings with some 1/4 x 1/4 inch phenolic
 > sticks
 >  > to provide good air circulation.
 >  >
 >  > We run this type of reactor at 7-12 kVA levels with our pole xmfrs.
 >  >
 >  > Dr. Resonance
 >  >  >
 >  >  > Can anyone please tell me how to design a ballast or
 >  >  > what I could use as a ballast for a pole pig? E-mail
 >  >  > me at  dimon20042004@xxxxxxxxx
 >  >  >
 >  >  > Thanks in advance:)
 >  >  > Robert
 >  >  >
 >  >  >
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