Re: First light great.

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Liviu Vasiliu <teslina@xxxxxxxxx>

Sometimes I had racing sparks on my coils because too
large spark gap. Decrease the gap and see how it works
before removing turns (I am thinking that this coil
worked well before this problem appeared). Did you
modify the primary connections? Maibe sounds stupid
(in SGTC the winding direction does not count) but
reverse the connections on primary and see how
performs..

vasil
>
>

--- Tesla list <tesla@xxxxxxxxxx> wrote:

> Original poster: "Daniel Koll"
> <dk_spl_audio@xxxxxxxxxxx>
>
> Ok, thanks.  I will try making a toroid first but
> have some
> questions.  When I make the disc out of wood, should
> I cover the whole
> thing in AL tape?
> Even the bottom?  Anything else I should know?  I
> will start with the
> 3"X12" that you recommended unless someone on the
> list doesn't think that
> is a good starting point.
>
> If I would have known about the coupling I would
> have changed my design.
> This is my first coil and I had never heard of this
> ever being a
> problem.  I ran the coil for probably 2 1/2 minutes
> total with this
> issue.  The secondary seems to be fine and in as
> good condition as when I
> started, I hope the streamers didn't make pin holes
> through the enamel and
> polyurethane.  If the new toroid does fail then I
> guess I will remove some
> of the secondary windings.  My secondary is wound
> for 16" so if I take off
> a 1/4-1/2" I don't think the output will be reduced
> too much.
>
> Finally, many people said that maybe it was just out
> of tune.  Isn't the
> coil tuned when you achieve the largest spark
> output?  All I did was trial
> and error until I saw what I think was the biggest
> sparks.
>
> Thanks
>
> >From: "Tesla list" <tesla@xxxxxxxxxx>
> >To: tesla@xxxxxxxxxx
> >Subject: Re: First light great.
> >Date: Thu, 26 May 2005 09:01:45 -0600
> >
> >Original poster: "Bart B." <bartb@xxxxxxxxxxxxxxxx>
> >
> >Hi Daniel,
> >
> >There is no rule that the bottom secondary and
> primary should be on the
> >same plane. However, often it can be close. A good
> practice is to always
> >build into your design the ability to adjust the
> coupling by moving the
> >secondary (or primary) as necessary. In the event
> the coil is not
> >constructed for this adjustment, then unwinding a
> few turns from the
> >bottom secondary will perform the same function.
> However, I doubt your
> >coil is coupled too tight (a hunch). Most likely,
> the coil is out of tune
> >and the sphere isn't helping. The coil would behave
> better with a toroid
> >rather than a sphere simply due to the shape of the
> toroid and how this
> >shape interacts with the voltage stresses at the
> top of the coil. Large
> >spheres will perform better than smaller ones, but
> breakout power comes
> >into play with larger spheres.
> >
> >I would recommend first a small toroid (3" x 12" or
> near). You can use
> >most anything. Simple Al-flex tube from Home Depot
> has been used for
> >years. Make a round wooden disk and cover in
> Al-tape. Insert the disk into
> >the center of the toroid. The disk aids in the
> voltage stress shielding.
> >You can also use Al-tape to hold it all together.
> Second, tune the coil.
> >Use a program, trial and error, or whatever suits
> you. Then, if you still
> >have racing sparks, you can go after the coupling.
> Considering your
> >construction doesn't support an easy coupling
> adjustment, I would put it
> >last on the list.
> >
> >Take care,
> >Bart B.
> >
> >Tesla list wrote:
> >
> >>Original poster: "Daniel Koll"
> <dk_spl_audio@xxxxxxxxxxx>
> >>
> >>No I was not using a break out, I just attached my
> secondary magnet wire
> >>to the bottom of the sphere using aluminum tape.
> Should I change
> >>something?  I cannot change the height of my
> primary or secondary without
> >>massive reconstruction.  It would take hours and
> hours to change now.  I
> >>was told that the bottom of the secondary and
> primary should be on the
> >>same plane so that is what I did.  Thanks
> >>
> >>>From: "Tesla list" <tesla@xxxxxxxxxx>
> >>>To: tesla@xxxxxxxxxx
> >>>Subject: Re: First light great.
> >>>Date: Tue, 24 May 2005 20:47:13 -0600
> >>>
> >>>Original poster: jdwarshui@xxxxxxxxx
> >>>
> >>>Hi Daniel
> >>>
> >>>I would agree with Gary about being overcoupled
> but it is also likely
> >>>that you need to re tap your primary. We usually
> place our spherical
> >>>capacitors directly on the end of the secondary.
> Many coilers believe
> >>>that spheres are inferior to toroids but I am not
> convinced that this
> >>>is true and have never seen any evidence to
> support this assertion.
> >>>
> >>>Are you using a breakout on your sphere?
> >>>
> >>>Jared Dwarshuis
> >>
> >>
> >>