Re: Baffles

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "D.C. Cox" <resonance@xxxxxxxxxx>


Good point.

I always construct my primaries exactly the same 
way --- inner most turn exactly 1.5 inches away from the sec. coilform.

The elevations are consistent and appear to be a 
straight linear function as the dia. of the coilform increases.

Dr. Resonance

I've noticed you have mentioned in recent
postings specific sec winding locations above the
primary plane as based on the coil diameter. In
this particular post, you suggested 2.25" above.
I understand you have made many coils and have
experimentally determined this information. But,
you must also assume a specific primary
dimension. For example, if a coiler through zero
experience made the inner primary diameter 8" to
be used with a 4" coil, well then you would
greatly affect L1 to L2 proximity (k). So, in the
case of coil Rich is building, what dimension would you recommend?

Take care,
Bart

Tesla list wrote:

> Original poster: "D.C. Cox" <resonance@xxxxxxxxxx>
>
>
>
> If you plan to produce a spark length equal to 
> or greater than the coil length then use baffles 
> to preclude any chance of interior 
> flashover.  No vents in these baffles as they 
> need to be 1/4 inch thick insulation.
>
> There is no need to make your sec height 
> adjustable. I've fully explored this years 
> ago.   Just start the sec winding at a location 
> that will be 2.25 inches above the even plane of 
> the primary and you will have the best spark 
> with no racing spark problems.  Wind your coil 
> with #26 AWG wire and use a height/OD ratio of 5:1 for a nice coil.
>
> Dr. Resonance
> ----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Tuesday, April 25, 2006 4:27 PM
> Subject: Baffles
>
>
> Original poster: "Rich" <rdjmgmt@xxxxxxxxxx>
>
> I am getting ready to build my next coil.
> Secondary form is 6 id drain pipe. I just
> completed a winder setup (and yes it will be left
> to right). It has two brush coats of polyurethane
> on the out side it and now is setting on end with
> a 100w bulb in it to make sure it is dry before I
> spray the inside. A note a few days ago Dr. R
> said to be sure and install a baffle about 5"
> inside the tube and seal with RTV.  I have a 6mm
> Lexan plug at the top for torrid mount with a ¼
> hole in it and a Lexan plug backed up by a Lexan
> plate at the bottom, both vented, so I can mount
> the secondary with nylon threaded stock to adjust
> height if needed.  This assembly will slide down
> through the plywood that the primary is mounted
> on. The primary is above the plywood by 1.5"
>  Do I still need the baffles about 5 "inside the
> tube and should they be vented in the center?
>
> Rich, from the middle of Missouri