Re: PVC Pipe

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Dr. Resonance" <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" <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" <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Friday, March 11, 2005 11:45 PM
> Subject: Re: PVC Pipe
>
>
>  > Original poster: Karl Lindheimer <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" <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"
>  > ><dhmccauley@xxxxxxxxxxxxxxxxxxxxxxxxxx>
>  > > >
>  > > > 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
>  > >
>  >
>  >
>  >
>
>
>