Re: Primary coil (aluminum ?)

Subject:  Re: Primary coil (aluminum ?)
  Date:   Sun, 15 Jun 1997 13:52:28 -0600
  From:  "DR.RESONANCE" <DR.RESONANCE-at-next-wave-dot-net>
    To:  "Tesla List" <tesla-at-pupman-dot-com>

TO: Lynn

The aluminum will work --- but with a great loss in peak primary
Aluminum is only marginal at 60 Hertz but at 300-400 KHZ it is not a
performer.  If you are using a small neon sign type transformer to
your power source it might be wiser to consider using 1/8 inch copper
refrigeration tubing.  It isn't very expensive and would be a much
choice.  If you get down to the Wis. Dells area I will give you some 5/8
inch copper strap which we use in our smaller coils.  It works good and
offer good conductivity at the higher frequencies.  We have a 1,000 foot
roll which we have been using for years and I could certainly spare
(free) for a small coil system.


> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-poodle.pupman-dot-com
> Subject: Re: Primary coil (aluminum ?)
> Date: Saturday,June 14,1997 2:27 PM
> Subject:     Re: Primary coil (aluminum ?)
>       Date:  Sat, 14 Jun 1997 08:11:05 -0500
>       From:  Chuck Curran <ccurran-at-execpc-dot-com>
>         To:  Tesla List <tesla-at-pupman-dot-com>
> References:  1
> Tesla List wrote:
> > 
> > Subject:   Primary coil
> >   Date:   Fri, 13 Jun 1997 11:32:09 -0500 (CDT)
> >   From:  aasphalt-at-win.bright-dot-net (Lynn Anderson)
> >     To:  <tesla-at-pupman-dot-com>
> > 
> > I have flat spiral wound coil in a broken dehumidfier. The coil is 11"
> > o.d
> > and is made of an aluminum tube that is flattened so that is 1/4" wide
> > by
> > 1/2"deep.There are 11 turns in the coil.I plan to use a neon
> > transformer.
> > Will this coil be appropriate to use? Thanks.
> > "Tars and Stripes Forever" from  Anderson Asphalt. Lynn Anderson
> Lynn:
> Yes, it would "work", but I would have to suggest going with round
> copper tube.  The first choice would be the thin wall refrigeration
> tube, while for the 1/4" and 3/8" tube primaries the standard thicker
> wall stuff found at any hardware store would also be fine.  I mentioned
> those two diameters based on what I recall you mentioning about your
> available transformers a week or so ago--neon I think, 30 ma?  The
> flattened aluminum tube would have a greater tendency to promote arcing
> due to the sharper edges, so try to stick with the full round tube for
> primary applications.  I think you might want to also determine what
> other materials you have available for the secondary construction and
> then use one of the calculation programs available to determine your
> operating frequency.  This will lead you to the number of turns, or feet
> of copper tube required for the primary.  Hope you have your cap picked
> out or selected the size, you'll need that too.  E-mail me direct if I
> could be of any help,  be happy to attempt to clear up any points if
> possible.
> Chuck Curran