Thanks for your response,
Sorry I was not very clear on my spark gap design. Here is a rough rendered
image of what it will look like. A vacuum pump will suck the air from the
tube to lessen the air resistance for greater control over the spark gap
and limit ozone production for obvious reasons.
http://s29.postimg.org/t4o3jgapz/spark_gap.jpg What do you think? Is it
worth the benefits?
Thanks,
Kuba Anglin
On Sun, Feb 16, 2014 at 6:46 PM, Gary Lau <glau1024@xxxxxxxxx> wrote:
> Hi Kuba,
>
> There's nothing wrong with adding a sphere atop a toroid. However, the
> incremental capacitance of the sphere, assuming your image is to scale,
> will be rather small, as the shape of the toroid will shield the field from
> the sphere. I think just adding an extra primary turn would probably have
> a greater impact at lowering Fres than the added sphere.
>
> If you're shooting for the maximum spark length, I think the size of your
> toroid needs to be up'ed considerably. With my 15/60 NST, I use a 7x30
> primary toroid with a smaller corona ring toroid spaced beneath it, to gain
> additional height for the main toroid. With top loads, bigger is _always_
> better.
>
> I didn't completely understand the geometry of your gap. I don't think
> there's any good reason to try to contain the gap arc. PVC, and
> particularly rubber (!), will suffer rapidly from exposure to the UV
> radiation of the gap. I think the gap will generate the same amount of
> ozone whether or not it's contained, assuming that the air is circulated
> and not sealed, and you DO want good circulation. And in any
> well-performing coil, the sound from the top load sparks will be much
> louder than the sound of the gap, so no point in trying to muffle it. I
> would recommend a sucker gap - it's been widely tested and is easy to
> construct and adjust. See http://www.laushaus.com/tesla/onegap.htm
>
> Hope this helps,
>
> Regards, Gary Lau
> MA, USA
>
>
>
>
> On Sun, Feb 16, 2014 at 8:03 PM, Kuba Anglin <kubaanglin@xxxxxxxxx> wrote:
>
> > Hello,
> >
> > I have been working on a Tesla coil design for the past month now and am
> > about ready to order the parts.
> >
> > My main questions:
> >
> > -Are there any issues with my design?
> > -Is it OK to have a toroid and a sphere as the top load? I am only doing
> > this because these two pieces equal the required capacitance level of
> > around 29pF (see the TeslaMap image for more info).
> > -I was planning on creating a vacuum static spark gap by putting the
> > electrodes inside a PVC pipe sealed with rubber sheets and lexan board.
> The
> > vacuum pump would suck out the air to limit resistance caused by the air,
> > lessen ozone production, and reduce noise. Does this sound like a good
> > idea?
> >
> > I have added a 3D render of my design and a filled out TeslaMap page. I
> > will be phasing two NSTs to achieve the right amperage. Check the
> TeslaMap
> > attachment for more specific specs.
> >
> > 3D render link: http://s13.postimg.org/q9tpxzsjb/Tesla_Coil.jpg
> > TeslaMap link: http://s9.postimg.org/t0ss08wmn/Tesla_Map_Page.jpg
> >
> > Here is my parts list:
> >
> > Secondary Coil6.625" PVC Pipe 3'22 AWG Magnet Wire 5lbs wound 34"
> > highToroid
> > 18" x 4.5" + Sphere 7" diameterPrimary Coil3/8" Copper Tubing 60' 11
> > turns1/2"
> > Copper tubing 10' strike railBase(2X) 15 KVA 60mA Transformer(2X) 1"
> Brass
> > Electrode
> > 72 Capacitors (.15uF 2kV each) 4 strings of 18(2X) Brass Bolt
> >
> > Thanks,
> > Kuba Anglin
> > _______________________________________________
> > Tesla mailing list
> > Tesla@xxxxxxxxxx
> > http://www.pupman.com/mailman/listinfo/tesla
> >
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
>
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla
