[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: PVC Pipe - Plastic Wrap Coating

Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>

Hi Paul,

At 04:21 PM 3/12/2005, you wrote:
Hi Terry,
What kind of plastic tube is that in your photo?

It is 1/8 thick 6 inch diameter Lexan from Mcmaster Carr. I had it laying around as "extra", so I used it for this coil. I forget how much it cost, but I think it was very pricey!!... I looked it up as #8585K23 at $28.44/foot!! But "normal" folks should not go paying that much!! Use cheap sewer pipe instead...

Do you seal the top and bottom of your secondary coils?

No. I don't use coatings anymore and I drill and pass bolts through the secondary tube as many will say not to do.... But I like to think even though I do these naughty things I have never had a problem with it and "I" sort of "know" how far to push those things ;-))

I live in SC and it is extremely humid here in the summer. That is why I am so concerned about sealing the PVC.

I think it is going to snow here in CO since the humidity is getting "really high" like 30%!! I don't worry much about humidity here... Have to judge what to do in your local...

Also, with the coating from Dolph being rated at 2000 V per mil, I thought the extra insulation over the windings wouldn't hurt.

It will not hurt anything!! Best to slowly turn the coil from a little motor while it dries to get a very nice even coating.

Do you run the coil in the pictures with the primary as high up on the secondary as it shows?

That was a CW coil arc over so the primary was super high compared to most coils in that case.

What kind of wire are you using for the primary?

It is just that 50 foot roll 1/4 inch OD copper tubing called "refrigeration tubing" from the hardware store. Pretty cheap at about $14 for 50 feet and it is nicely packed in a coil already.


Note that my primary to secondary spacing is extremely close!! I can pretty much ground the inner turn in the DRSSTC case so I can get away with that...



Paul Brodie
----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Saturday, March 12, 2005 5:45 PM
Subject: Re: PVC Pipe - Plastic Wrap Coating

> Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>
> Hi Dave,
> I don't "paint" my coils anymore either ;-) I do wind them "tight" so
> minor temp/humidity variations do not cause the windings to go loose and
> fall. But for protection, I wrap them good with shipping stretch
> wrap. All office supply stores have it. It is like Saran wrap but
> heavier. It protect the coil from physical damage very well and if it arcs
> up or gets damaged, you can easily pull it off and replace it!! Here is my
> new little DRSSTC coil.
> http://hot-streamer.com/temp/PlasticWrap.JPG
> Here is were I blew one a while back...
> http://hot-streamer.com/temp/WrapBurn01.jpg
> Looks bad!!
> http://hot-streamer.com/temp/WrapBurn02.jpg
> The wrap does not "burn bad" so the actual damage was limited...
> http://hot-streamer.com/temp/WrapBurn03.jpg
> Just coated it with epoxy...
> http://hot-streamer.com/temp/WrapBurn04.jpg
> Brushed it up before the coating with a toothbrush,magnifier, and
> alcohol. Not bad at all!!
> http://hot-streamer.com/temp/WrapBurn05.jpg
> Here is the wrap from Office Depot...
> Cheers,
> Terry