Re: PVC Pipe

["Tesla list" <tesla@xxxxxxxxxx>]

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
> >  > >
> >  >
> >  >
> >  >
> >
> >
> >
>
>