" It can be noticed that PVC isn't used in the electrical industry outside
of low voltage wire insulation. It's not a great choice, especially for
high voltage applications. We just use is as it's good enough, and at
least in north america, very available, and at a reasonable price as it's
the cheapest of all plastics."
No kidding! I tried pricing 4.00" OD acrylic and polycarbonate - yikes! 24
inches of acrylic was over $225.
On Thu, May 19, 2022 at 9:12 AM <pupman.com@xxxxxxxxxxxxxxxxxxx> wrote:
> In general, PVC cannot be epoxied.
>
> There is nothing wrong with mechanical fasteners on a PVC pipe. Anybody
> with internal arcing on the inside of secondary is doing something else
> wrong. The voltage at the bottom of the secondary is zero. There is no
> reason to overcomplicate something as simple as a binding post.
>
> PVC pipes are not clean when you buy them.
>
> Wash and scrub them, including the bore before use. You don't know what
> release agents or plasticizers are on those surfaces. PVC pipes (or
> anything made of "PVC") is a complex mix of additives as pure PVC is
> completely useless as a final product.
>
> It can be noticed that PVC isn't used in the electrical industry outside
> of low voltage wire insulation. It's not a great choice, especially for
> high voltage applications. We just use is as it's good enough, and at
> least in north america, very available, and at a reasonable price as it's
> the cheapest of all plastics.
>
>
> On Wed, 18 May 2022, Joshua Thomas wrote:
>
> > Hi Jim,
> >
> > It looked to be the copper side that failed. I had cleaned both surfaces
> > with isopropyl before using the epoxy; perhaps I needed to wait a bit
> long
> > for the iso to clear up.
> >
> > I really not have had any great results trying to use epoxy (Bob Smith
> > brand, in this case) with plastic surfaces; but most of my epoxy
> experience
> > is with amateur rocketry, which uses material like phenolic and woods.
> >
> > Joshua Thomas
> >
> >
> >
> > On Wed, May 18, 2022 at 8:14 PM Lux, Jim <jim@xxxxxxxxxxxxx> wrote:
> >
> >> On 5/18/22 4:43 PM, Joshua Thomas wrote:
> >>> Hello Mads,
> >>>
> >>> Thank you for reminding me of your site, I had used it before as a
> >>> reference. I have been sticking to the ?rules? of not putting any holes
> >> in
> >>> the secondary, but I see you?ve gotten away with it on occasion. I
> might
> >>> try using a nylon bolt threaded from the inside to outside as a place
> to
> >>> terminate the bottom of the coil.
> >>>
> >>> On that note, do you have any recommendations for adhesives for
> >>> plastic-plastic (pvc) and metal-plastic bonding? The epoxy I used to
> >> hold a
> >>> piece of copper to a pvc pipe was a complete failure.
> >>
> >> Which side of the joint failed? The copper or the PVC? You have to be
> >> scrupulously clean.
> >>
> >> I use silicone sealer (like for tubs or aquariums) for a general purpose
> >> "glue" - it sticks to most stuff pretty well. It's not good
> >> structurally, but for something that's not seeing a lot of loads it
> >> works ok - good epoxy joints are stronger than the material in some
> cases.
> >>
> >>
> >> _______________________________________________
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> >>
> > --
> > Joshua Thomas
> >
> > My new email address is: joshuafthomas@xxxxxxxxx
> > Please update your information if you have not already done so.
> > _______________________________________________
> > Tesla mailing list -- tcml@xxxxxxxxxxxxxxx
> > To unsubscribe send an email to tcml-leave@xxxxxxxxxxxxxxx
> _______________________________________________
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> To unsubscribe send an email to tcml-leave@xxxxxxxxxxxxxxx
>
--
Joshua Thomas
My new email address is: joshuafthomas@xxxxxxxxx
Please update your information if you have not already done so.