Re: [TCML] Design questions

[otmaskin5@xxxxxxx]

Thx Dr - Dennis 


-----Original Message-----
From: DC Cox <resonance@xxxxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Tue, 27 Jan 2009 9:52 pm
Subject: Re: [TCML] Design questions



All JAVATC measurements are taken from the ground plane, so perhaps best to
use the floor.  If setting on a table top, then usually the
very base (lowest point) is commonly used.

Pri to sec spacing is also determined in JAVATC.  For most small coils set
it at a k value of 0.1 to 0.14.  I use 0.12 for most applications.  This is
"what-if" adjusted in JAVATC using different inner primary radius and also
different elevations of sec coil height above the flat plane of the pri
coil.

Usually, try 1" as a starting point with sec approx 1/2 above pri.

Use a hyperbaric spark gap if you want best output from minimum input.

Dr. Resonance

On Tue, Jan 27, 2009 at 5:20 PM, <otmaskin5@xxxxxxx> wrote:

> Hey guys, I've been on a break from coiling.? Last spring, my 15/60 coil
> quit?in the midst of a little smoke & flame.? I got kind of fed up?and
> decided?I just needed to hang it up for a while.? Although I've pretty
> regularly been reading the posts from this list.? Now I'm back into it?&
> have gotten into?rebuilding an old 9/30 coil that was a marginal performer.?
> It's kind of fun?trying using JAVATC to do it right this time and rebuild it
> from the ground up.
>
> I'd be much oblidged if someone could answer a couple of questions for me.?
>
> 1.? This is a table top coil so it will be operating on a table, stool or
> something off the ground.??When measuring heights (topload, top turn
> secondary, lowest turn, etc) for entry into JAVATC, do you measure height
> from the floor or from the table the coil sits on??
>
> 2.? When JAVATC suggests a minimum distance between primary & secondary
> coils, how do you position the secondary within the flat spiral primary?? If
> minimum distance is supposed to be 1" between coils, is the secondary
> located 1" from the START of the primary?? If so, then at 1/2 turn of the
> primary, the distance would be slightly more than 1" as the primary spirals
> further from the center.? Or do you try to position the secondary
> equidistant between the start of the primary and the primary
 at 1/2 turn??
> Or am I getting way too deep into this & it doesn't really matter?
>
> Any help would be appreciated.? Thanks.? It's good to be back!
>
> Dennis Hopkinton MA
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