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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
current.
Aluminum is only marginal at 60 Hertz but at 300-400 KHZ it is not a
good
performer. If you are using a small neon sign type transformer to
provide
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
better
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
enough
(free) for a small coil system.
DR.RESONANCE-at-next-wave-dot-net
----------
> 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