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Re: 4 kV powered tesla coil-pics

Original poster: Liviu Vasiliu <teslina@xxxxxxxxx>

Yes, a smooth toroid would work better....but I didn't
have it. There are a few weak points in the setup
(primary tap connection, alu electrodes in the spark
gap, rough toroid, no safety gap), but I built the
coil to prove a point, so didn't bother with the
design too much.

Happy coiling and keep safe!

--- Tesla list <tesla@xxxxxxxxxx> wrote:
> Original poster: "Steven Steele"
> <sbsteele@xxxxxxxxxxxxx>
> Wow, that's impressive!
> I do see one flaw, though. It's not really that
> important, but it could
> work much better if you had a smooth toroid.
> The streamers and arcs always want to come off at
> the furthest point from
> the center of the toroid. so each one of those
> ridges is like a tree in the
> feild during an electrical storm. This lowers the
> capacitance of the toroid
> and therefore lowers the possible output voltage,
> therefore the streamers
> are not as long as they could be. It may be hard to
> find a good toroid but
> you can purchase them. I found a sit the other
> day,but I can't find it now.
> I'll keep looking.
> Good job!
> Steven Steele
> ----- Original Message ----- From: "Tesla list"
> <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Saturday, April 09, 2005 2:32 PM
> Subject: 4 kV powered tesla coil-pics
> >Original poster: Liviu Vasiliu <teslina@xxxxxxxxx>
> >
> >Hi list
> >
> >2 MOTs powered tesla coil.....Why not?
> >There are a few advantages:
> >
> >-MOTs can be a good replacement for NSTs, sometime
> >hard to find, even the little 2 kV output MOTs. It
> >does not need to use 4-6 MOTs, no oil bath, no
> >doublers, no silicon, no saturated or primary
> >overvolted MOTs.
> >-with proper current limiting with inductive
> ballasts
> >on the low voltage side, they work ok.
> >-the primary cap is cheaper because the lower
> voltage
> >rating
> >-the spark gap does not need air flow. Just use a
> >multiple gap (at least 3 gaps, one variable) and
> big
> >metal electrodes to get good cooling and quenching.
> >- use a strike ring to protect the MOTs from
> >overvolting (arcs to the primary).
> >
> >The results and construction can be seen here:
> >
> >http://www.geocities.com/livvasil/4kvtc.html
> >
> >For higher power levels just modify the ballasts,
> >increase the primary cap, the number of gaps and
> get
> >it tuned.
> >
> >Enjoy
> >
> >vasil