Inside the secondary coil? Thatâ??s actually possible without flashover or
other faults?
On Wed, May 25, 2022 at 4:47 PM Mads <fleex@xxxxxxxxxxx> wrote:
> Steve Ward used a secondary coil MMC inside the secondary coil, to
> combat the huge streamer load on the small resonator.
>
> https://www.flickr.com/photos/kickermagnet/page2
>
> Kind regards
>
> Mads Barnkob
>
> On 25-05-2022 02:28, Daniel Kunkel wrote:
> > Joshua,
> > The voltage gain in a Tesla Coil is a ratio of either the inductance of
> L1
> > to L2, or the capacitance of C1 and C2.
> >
> https://wikimedia.org/api/rest_v1/media/math/render/svg/0e212023a432b67ae4a3174efd65e30802af3428
> > As you can see, if you add more capacitance to the secondary circuit, the
> > voltage is reduced.
> >
> > However, spark production is not all about voltage, you do need ample
> > capacitance. That capacitance is achieved through the discharge terminal,
> > which is typically a toroid or sphere. In practice this is a nice setup
> as
> > the large smooth radii of the shape provides a higher break out voltage
> and
> > yields (hopefully) the right amount of capacitance for nice spark output.
> > Additionally, without a decent size/shape discharge terminal, unwanted
> arcs
> > will appear at the top of the secondary. I also have to believe that
> adding
> > this type of capacitance would be considered parasitic, much like the
> self
> > capacitance of L2 (which is unwanted inefficiency).
> >
> > So can you add capacitance in series with L2 and the ground? Yes. Will it
> > change Fres? Yes. Could you tune a coil this way? Yes...but this is
> really
> > impractical. Aside from finding a capacitor to withstand that
> environment,
> > it would probably be expensive...but also you would need a bunch of them
> in
> > infinite capacitances to re-tune with any accuracy.
> >
> > A far easier and simpler solution is to tap the primary. You can move the
> > tap 1/4" inch at time to finely tune your coil to the exact frequency for
> > free and it is infinitely adjustable.
> >
> > You might want to look up "tesla coil counter poise ground"...that would
> be
> > a related idea to what you are asking about...
> >
> > ~Dan
> > Kansas City area
> >
> > On Tue, May 24, 2022 at 6:20 PM Joshua Thomas <joshuafthomas@xxxxxxxxx>
> > wrote:
> >
> >> While playing around in JavaTC, I realized that the overall capacitance
> of
> >> the secondary coil (and hence Fres) could be modified by placing a
> series
> >> capacitor between the coil and ground.
> >>
> >> Tuning seems to usually be done on the primary coil by tapping, but this
> >> also seems an option. Has this been tried, and what results/caveats were
> >> there?
> >>
> >> Thanks,
> >> Joshua
> >>
> >> --
> >> Joshua Thomas
> >>
> >> My new email address is: joshuafthomas@xxxxxxxxx
> >> Please update your information if you have not already done so.
> >> _______________________________________________
> >> Tesla mailing list -- tcml@xxxxxxxxxxxxxxx
> >> To unsubscribe send an email to tcml-leave@xxxxxxxxxxxxxxx
> >>
> > _______________________________________________
> > Tesla mailing list -- tcml@xxxxxxxxxxxxxxx
> > To unsubscribe send an email to tcml-leave@xxxxxxxxxxxxxxx
> _______________________________________________
> Tesla mailing list -- tcml@xxxxxxxxxxxxxxx
> To unsubscribe send an email to tcml-leave@xxxxxxxxxxxxxxx
>
--
Joshua Thomas
My new email address is: joshuafthomas@xxxxxxxxx
Please update your information if you have not already done so.