Re: [TCML] Primary Secondary Coupling

[DC Cox <resonance@xxxxxxxxxxxx>]

Typical first turn of sec is 1-2" above pri.  It depends on your coil sec
dia and inner pri diameter.  JAVATC can do all this for you and it's free.
Shoot for a final k value of 0.12 to 0.14 for a classic coil.  Slightly
looser coupling usually produces longer sparks with class coils.

Typ primary coil support is 1/2" wide (white Delrin plate) x 1" high x
length required (JAVATC will calc number of turns required.  I usually add
two more beyond this.  A ball nose cutter in a mill makes fast work of
cutting the tubing supports usually 1/2 to 5/8" deep in the Delrin.  Try to
cut depth so top is level and tubing will "snap" into place.  Keep the
tubing roll rolled up as you work your way around just expanding it slightly
as you go --- usually leading by 3/4 - 1 turn with the hand expansion.

Contact me off-list and I will email you two design aids I use with JAVATC
--- makes data entry very easy.

Dr. Resonance

On Thu, Jul 1, 2010 at 6:12 PM, Brandon Hendershot <
brandonhendershot@xxxxxxxxx> wrote:

> Hi All,
> I'm in the midst of designing my primary coil supports. Right now, how tall
> they need to be. When you go to change the coupling between the primary and
> secondary coils, does the bottom windings of the secondary coil ever really
> need to go very far below the primary coil? If so, I'll need to go with
> fewer, taller supports to make room for it to go that low. If not, I'll go
> with more, shorter supports. (I have a limited supply of materials is all.)
> Thanks,
> Brandon_______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
>
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla