[TCML] New Coil

[Miles Mauldin]

Could that really be correct?  Using the javatc tool it suggests my primary inner diameter to be only 1.5" greater than the secondary form (a difference of .75" radius), and to obtain .14k coupling the lower end of the secondary is .5" below the primary.  I worry when the primary and secondary is that close; should I?




________________________________
From: John Forcina <forcijo10 at gmail.com>
To: Tesla Coil Mailing List <tesla at pupman.com>
Sent: Mon, March 8, 2010 1:22:52 PM
Subject: Re: [TCML] New Coil

If i read correctly in this photo,
http://www.cmnow.com/TeslaMan/Toroid/tn1.htm You plan to have your primary
coil 4" That is going to be way too low and your coupling between your
primary and secondary coils will be very small allowing very little energy
transfer into the secondary coil.  I recommend you plug your coil specs into
Javatc http://www.classictesla.com/java/javatc.html .  Adjust your primary
height and diameter and adjust your primary coupling to about K=.14

On Mon, Mar 8, 2010 at 12:58 PM, DC Cox <resonance at wildblue.net> wrote:

> Good value to use for toroid size is to make the toroid major dia. twice
> the
> dia. of coilform sec dia.    For higher power coils above 10 kVA this value
> is sometimes stretched to 3 x coil form dia.
>
> Nice looking controller.
>
> Many happy and long sparks,
>
> Dr. Resonance
>
>
>
>
>
> On Mon, Mar 8, 2010 at 7:42 AM, Miles Mauldin <teslamiles at att.net> wrote:
>
> > Hi all,
> >
> > Project update (some have asked).  Productive weekend besides the yard
> work
> > and other wife induced projects.  Completed the power control box -
> > http://www.cmnow.com/TeslaMan/Control , and made a double Toroid -
> > http://www.cmnow.com/TeslaMan/Toroid .  Hoping I got the Toroid
> deminsions
> > correct.  Moving along; magnet wire came in and am working on building
> the
> > coiling jig.  As always, any comment welcome (in fact most comments are
> > helpful!)
> >
> > Miles
> >
> >
> >
> >
> > ________________________________
> > From: Miles Mauldin <teslamiles at att.net>
> > To: Tesla Coil Mailing List <tesla at pupman.com>
> > Sent: Wed, March 3, 2010 1:28:17 PM
> > Subject: [TCML] New Coil
> >
> > Hi all,
> >
> > Built my first TC in 1976 and haven't done it again since until now.
> > Things have changed since then; all I had back then was campus and public
> > libraries.  Thought I would share my project photosand I must admit, I am
> > rather proud of my Terry Filter.  Still a lot of work to do but I think I
> am
> > off to a good start.  Comments, questions, criticism, praise, all
> welcome.
> >
> > http://www.cmnow.com/TeslaMan
> >
> > Miles
> > _______________________________________________
> > Tesla mailing list
> > Tesla at pupman.com
> > http://www.pupman.com/mailman/listinfo/tesla
> >
> > _______________________________________________
> > Tesla mailing list
> > Tesla at pupman.com
> > http://www.pupman.com/mailman/listinfo/tesla
> >
> _______________________________________________
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>
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