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Re: [TCML] Tesla Coil parameters list like Tesla Map software (i.e. spark length, secondary height, # of NSTs)?

From the side of the 6"x25" toroid it hits the wooden framing on wall so I
move the coil just far enough away so that it still zaps the wood which
when the variac is turned up somewhat more than 120vac It will reach about
4 feet. Also have tried a grounded copper tubing rod on some pvc pipe but
it doesn't always hit it unless I move it in closer.

I did try a nail wedged in between the top of the foil pizza tray and the
6" ducting. It usually shoots "up" from the very tip of the nail in a
larger spark with some smaller side spray of sparks. I was reading
yesterday about using a sewing needle poked into the side of the aluminum
ducting and was thinking of trying that out.

Tim

On Tue, Apr 7, 2015 at 7:05 AM, Yurtle Turtle via Tesla <tesla@xxxxxxxxxx>
wrote:

> Many people use a breakout point so you only get one spark, and measure to
> a grounded target, like a ladder. Are you measuring this way?
>
>       From: Timothy Gilmore <tdg8934@xxxxxxxxx>
>  To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
>  Sent: Monday, April 6, 2015 2:52 PM
>  Subject: Re: [TCML] Tesla Coil parameters list like Tesla Map software
> (i.e. spark length, secondary height, # of NSTs)?
>
> I found Jeff Pennoyer's site:
>
> http://www.webring.org/l/rd?ring=teslaring;id=107;url=http%3A%2F%2Fhome%2Ecomcast%2Enet%2F%7Epennoyer%2FJeffPage%2Ehtml
>
> At the bottom there is this list which falls in line with what I was
> looking for on spark length:
>
> APPROXIMATE SPARK LENGTH VRS POWER INPUT CHART
> SPARK LENGTH POWER INPUT
> 6 - 8 INCHES 300 W
> 8 - 12 INCHES 500 W
> 12 - 18 INCHES 700 W
> 15 - 20 INCHES 1000 W
> 18 - 24 INCHES 1200 W
> 24 - 30 INCHES 1500 W
> 30 - 36 INCHES 2000 W
> 36 - 45 INCHES 2500 W
> 45 - 56 INCHES 3000 W
> 56 - 64 INCHES 3500 W
> 64 - 72 INCHES 4000 W
> 72 - 80 INCHES 4500 W
> 80 - 90 INCHES 5000 W
>
> So using (2) 15kv 60mA NST provides about 1850 W. I am getting at least 36
> inches and many times 48 inches or more of sparks from my 6"x25" toroid:
>
> STANDARD SIZE TOROID REFERENCE CHART
>
> TORUS SIZE TORUS CAPAC. SUG. SEC. DIA. SUG. POWER LEVEL
> 1 X 6 in. 5.10 PF 2 - 4 in. 200 - 400 W
> 2 X 8 in. 6.80 PF 3 - 5 in. 400 - 800 W
> 3 X 12 in. 12.95 PF 4 - 6 in. 700 - 1500 W
> 5 X 14 in. 16.08 PF 6 - 8 in. 1200 - 2500 W
> 5 X 20 in. 21.58 PF 8 - 12 in. 1800 - 4000 W
> 7 X 30 in. 32.17 PF 10 - 15 in. 3500 - 6000 W
> 6 X 36 in. 37.18 PF 12 - 18 in. 5000 - 7500 W
> 12 X 36 in. 40.84 PF 16 - 20 in. 6500 - 10000 W
> 8 X 48 in. 49.60 PF 18 - 22 in. 8000 - 12000 W
> 12 X 48 in. 51.80 PF 21 - 25 in. 10000 - 15000 W
> 12 X 60 in. 63.33 PF 23 - 28 in. 13000 - 18000 W
> 20 X 60 in. 68.10 PF 26 - 30 in. 15000 - 20000 W
>
>
> Looks like my coil is exceeding these specs on spark length.
>
> I'm wondering if building a bigger toroid perhaps 8"x32" (or so) will be an
> overkill for only 1850W on my 2 NSTs?
>
> Tim
>
>
>
> On Mon, Apr 6, 2015 at 8:34 AM, Timothy Gilmore <tdg8934@xxxxxxxxx> wrote:
>
> > Has anyone put together any sort of a listing of others Tesla Coils built
> > with parameters listed such as:
> >
> > (for example): I have 2 NSTs (15kv, 60ma) each, 6" diameter, 31" high
> > secondary, torroid is ....
> >
> > I am getting 3-4' sparks and wondering if I should be getting longer
> > sparks. Is this normal? or should I add another NST or bigger Toroid
> > (working on an 8" diameter ducting bigger one). How do I know since the
> > Tesla Map software says I should get "ideally" 72.6 inch sparks and I'm
> > getting about 1/2 to 2/3 of that. Just wondering if it's not tuned
> properly
> > (but I think it is) - or making a larger toroid is worth the effort if
> I'll
> > gain a foot or more sparks.
> >
> > How does one know they are getting close to the best they can get in
> spark
> > length?
> >
> > I have attached my Tesla Map file of current settings.
> >
> > Thanks,
> >
> > Tim
> >
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>
>
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