Re: Help - Primary Supports

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: Mark Broker <mbroker-at-thegeekgroup-dot-org> 

Or slots can be cut using a radial-arm or table saw and just about any 
sharp saw blade.  For that matter, even a bandsaw or hand saw could be used 
despite a rough appearance.

The stagger will be defined by the tube diameter, spacing, and number of 
supports.  For instance 1/4" tubing spaced 1/4" with 6 supports will 
require a stagger of 1/(6/(1/4+1/4)) = 1/12" (or .083")  The slot width 
will be determined by the tube diameter.  Cutting the slots slightly 
narrower than the diameter of the tubing will save no end of grief when 
winding the primary.

Cheers!

Mark Broker
Chief Engineer, The Geek Group



On Mon, 13 Oct 2003 14:33:22 -0600, Tesla list <tesla-at-pupman-dot-com> wrote:

>Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com>
>
>A very good holder material for primary coils it white acetyl commonly
>called Delrin.  It's easy to machine.  We use size 1 inch high x 3/4 inch
>wide x "X" inches long for most all of our primary holders.
>Stagger the offset on each piece by approx 1/8th inch and cut sideways with
>a 1/2 inch ball nose cutter on a milling machine.  Most machine shops can do
>this for you in approx 15 min.  Use double sided masking tape to help them
>stick together when doing the stagger offset setup.  If you take the blocks
>in all taped together the shop won't need to do any setup and the price will
>be less expensive.
>
>Dr. Resonance
>
>Resonance Research Corporation
>E11870 Shadylane Rd.
>Baraboo   WI   53913
>  >
>  > I actually use this material for my coils and actually have a smaller
>  > piece of UHMW PE for a cover on the supports.
>  > See my picture of my 4" coil below showing the primary supports.
>  >  >  >
>  >  >  > I'm planning on redoing my primary for a larger coil and
>  >  > was planning on
>  >  >  > doing just what you recommend.  Question, is there a
>  >  > prefered plastic, such
>  >  >  > as polyethylene, for the support maybe with a little give
>  >  > in the plastic
>  >  >  > itself??