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Re: PVC Pipe
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- Subject: Re: PVC Pipe
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Sat, 12 Mar 2005 09:52:45 -0700
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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
It also makes the coil look nice.
----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
Sent: Friday, March 11, 2005 11:45 PM
Subject: Re: PVC Pipe
> Original poster: Karl Lindheimer <karl@xxxxxxxxxxxxxxx>
> 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.
> 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
> 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"
> > >
> > > 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
> > > 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
> > > > 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
> > > > and out and use it. It certainly is cheap and easy to find.
> > > > Paul Brodie