Re: PVC Pipe

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Jim Lux" <jimlux@xxxxxxxxxxxxx>

The insulation strength really isn't an issue here.  What you are really
concerned about is how flexible/tough it is.  You don't want to bump it and
have it flake off, or, to have the secondary flex (it happens... you drop
it, or lay it against something) and have it crack.


----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Saturday, March 12, 2005 2:13 PM
Subject: Re: PVC Pipe


> Original poster: "Paul B. Brodie" <pbbrodie@xxxxxxxxxxxxx>
>
> All,
> Thanks for all the information and suggestions on pipe for a secondary
> coil. Forgive me, I'm a perfectionist. I have decided to go with the white
> schedule 40 PVC and to dry and seal it inside and out. If the price I get
> from the Dolph Company is reasonable, I plan to use their ER-44
> polyurethane coating. Here is Dolph's description:
> Low cost, fast drying red polyurethane insulator. Excellent coverage and
> protection. Oil and moisture resistant and excellent adhesion.
> It also says that the dielectric strength is 2000 V per mil and AC-43 is
> listed as 1800 V per mil.
> It is listed under their insulator category and it comes in spray
> cans,which I think will be easier to apply.
> When Dolph gets back to me, I'll post the cost and any comments I get from
> their rep as to suitability of the product for what I have planned.
> Paul Brodie
> ----- Original Message -----
> From: "Tesla list" <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
> To: <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
> Sent: Saturday, March 12, 2005 2:06 PM
> Subject: Re: PVC Pipe
>
>  > Original poster: "Dr. Resonance"
> <<mailto:resonance@xxxxxxxxxx>resonance@xxxxxxxxxx>
>  >
>  >
>  >
>  >
>  > Dolph's AC-43 is the best to use and it won't permeate.  It's a special
>  > insulation formulated just for xmfr coil sealing.  Available in quarts.
See
>  > Dolph Co. on the internet and look at the companies history.
>  >
>  > We use this on all of our magnet wire coils.
>  >
>  > Dr. Resonance
>  >
>  >
>  > > Original poster: "Bob (R.A.) Jones"
> <<mailto:a1accounting@xxxxxxxxxxxxx>a1accounting@xxxxxxxxxxxxx>
>  > >
>  > > Even if you dry the secondary tube the usually coatings are permeable
to
>  > > water vapor so over a period of time the tube material will reach
>  > > equilibrium with atmospheric water vapor.
>  > > The winding because of its copper content probably represents a more
>  > serious
>  > > barrier if its coated.
>  > > Thick air tight baffles on the top and bottom of the tube probably
also
>  > > represent serous barriers.
>  > >
>  > > I agree the primary reseaon for coating the windings are for
mechanical
>  > > protection and to provide a smooth easily cleaned surface.
>  > > It may help a little with racing sparks and to an even lesser extent
>  > corona
>  > > formation.
>  > >
>  > > It also makes the coil look nice.
>  > >
>  > > Robert  Jones
>  > >
>  > > ----- Original Message -----
>  > > From: "Tesla list" <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
>  > > To: <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
>  > > Sent: Friday, March 11, 2005 11:45 PM
>  > > Subject: Re: PVC Pipe
>  > >
>  > >
>  > >  > Original poster: Karl Lindheimer
> <<mailto:karl@xxxxxxxxxxxxxxx>karl@xxxxxxxxxxxxxxx>
>  > >  >
>  > >  > Gary,
>  > >  >
>  > >  > I would have to concur with your statement that sealing the
secondary
>  > >  > windings with poly or lacquer is a very good idea.  The finish
>  > provides:
>  > >  > 1.  physical protection of the secondary windings.  2.
>  > >  > Mechanical aid to prevent windings from slipping or uncoiling.  3.
>  > >  > Insulation against racing sparks and arcing to primary.  4.  A
nice
>  > finish
>  > >  > to look at.
>  > >  >
>  > >  > Dan;
>  > >  >
>  > >  > I also nearly agree with your statement that drying and sealing
the
>  > >  > secondary former is usually not necessary.  Right now, in the
>  > Northeast,
>  > >  > the humidity levels are under 20 %.  You won't get much better
even in
>  > a
>  > >  > drying oven.  The only time I would recommend oven drying and then
>  > sealing
>  > >  > would be if the PVC tubing were exposed to very humid conditions
>  > outdoors
>  > >  > for a while.  Even then, it probably would not matter with the
average
>  > > coil.
>  > >  >
>  > >  > Regards,
>  > >  >
>  > >  > Karl
>  > >  >
>  > >  > On Mar 11, 2005, at 5:55 PM, Tesla list wrote:
>  > >  >
>  > >  > >Original poster: "Lau, Gary"
<<mailto:gary.lau@xxxxxx>gary.lau@xxxxxx>
>  > >  > >
>  > >  > >I would have to agree.  But I do still like to apply several
coats of
>  > >  > >polyurethane over the wound secondary to keep things from moving
>  > about,
>  > >  > >and general aesthetics.
>  > >  > >
>  > >  > >Regards, Gary Lau
>  > >  > >MA, USA
>  > >  > >
>  > >  > > > Original poster: "Daniel McCauley"
>  > >
>   >
><<mailto:dhmccauley@xxxxxxxxxxxxxxxxxxxxxxxxxx>dhmccauley@easternvoltag
> eresearch.com>
>  > >  > > >
>  > >  > > > I don't think you have to worry about drying and sealing your
PVC
>  > >  > >pipe.  To
>  > >  > > > be honest, i think its a waste of time.
>  > >  > > > I've built plenty of coils in the past years without doing
this and
>  > >  > >i've
>  > >  > > > never had a problem.
>  > >  > > > I wouldn't waste your time on that.
>  > >  > > >
>  > >  > > > Dan
>  > >  > > >
>  > >  > > >
>  > >  > > >  > All,
>  > >  > > >  > Thanks a lot for all the info on PVC pipe. They weren't
kidding
>  > >  > >when they
>  > >  > > >  > said everyone on here is nice and helpful! From what you've
told
>  > me
>  > >  > >and
>  > >  > > >  > from what I've seen other people using on their very
successful
>  > >  > >TC's, I
>  > >  > > >  > think I will just go ahead and dry and seal white schedule
40
>  > PVC
>  > >  > >inside
>  > >  > > >  > and out and use it. It certainly is cheap and easy to find.
>  > >  > > >  > Paul Brodie
>  > >  > >
>  > >  >
>  > >  >
>  > >  >
>  > >
>  > >
>  > >
>  >
>  >
>
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