Re: [TCML] What length for 13".

["DC Cox" <resonance@xxxxxxxxxxxx>]

4.5:1 height/dia ratio offers good performance and reduces spark discharges
to primary.
Use a sharp point off the toroid elevated at 20 degrees for long spark
lengths.

13" dia. x 4.5 height/dia ratio = 58.5" winding length

Using 1,000 total turns (pole xmfr), then 58.5" winding length / 1,000 turns
 =  .0585" OD wire size  =  17 AWG wire size

If it's a nst power coil, then 1,400 total turns offers good performance, so
58.5" / 1,400 turns  =  .042" OD wire size  =  18 AWG wire size

Use double-build enamel magnet wire for good performance and best dielectric
properties.

Many happy sparks,

Dr. Resonance



On Fri, Jul 4, 2008 at 12:09 PM, Ken <kens.coil@xxxxxxxxxxx> wrote:

> Hi all.
> Real quick ..
> What would be the best length for a coil if it's 13in diameter and 17awg  ?
>
> Thanks
> Ken
> http://kenscoil.com/
>
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