Re: [TCML] watcha think?? COMPLETED Tesla COIL :)

[DC Cox <resonance@xxxxxxxxxxxx>]

Another great coilform material is called SDR (sewer & drain).  It is green
in color.  Wall thickness is light so it makes for a nice light sec coil.  I
usually sand inside and outside and then seal with two coats Dolph's AC-43.

If you don't like the green color just do 2-3 inches on each end with Red
Glyptal (local large elec. motor rewind shop).  After winding you see only
the red on each end and the AC-43 which coats the magnet wire.  Usually 2
coats of AC-43 is adequate is your are doing the Envirotex epoxy which makes
for a glass-like looking coil --- very shiny under dim lights.

If not using Envirotex for the finish then use approx 6 coats of AC-43 on
the magnet wire allowing a full 12-16 hrs drying between coats.  In high
humidity locations allow 24-36 hrs between coats.
Dr. Resonance



On Mon, Aug 9, 2010 at 12:26 PM, Christopher Karr <chriskarr4@xxxxxxxxxxx>wrote:

>
> Hello "the iconoclast,'
>
> No offense is intended, Scott, though your comments on black secondary
> formers are without merit, unless speaking specifically of PVC.
>
> I would imagine that the black 'PVC' used in this coil is, in all
> actuality, ABS pipe. I have used it as a former with a low voltage-gradient
> (high-gauge wire) and there were no difficulties, whatsoever, even without
> any coating. No 'ion-jets' visible in long exposures at low- or medium-power
> (I didn't want to get my dad's camera too close on full power!!).
>
> Now, if it were - in actuality - black PVC, you would run against some
> issues. You wouldn't have output which was visible, unless you received a
> large secondary arc-over.
>
> Most 'black PVC' is ABS pipe, though people are so commonly calling it PVC
> that it's difficult to know when people are familiar with the difference.
>
> For a secondary former, the absolute worst you can have (barring the most
> obscenely moronic schemes ever imagined, such as a steel-cored former with
> inadequate insulation) is gray schedule-80 PVC. "Schedule-80" is a reference
> to the thickness of the wall; the larger the number, the greater the
> thickness and, as such, the greater the pressures allowed in its intended
> application. Its gray colour is derived from its innately being filled with
> heavy-weight carbon, iron and other pigments which make it a very poor
> insulator. If you want to employ an impressive determination of usefulness
> as a secondary former, attempt to charge it electro-statically. If you can't
> charge it to the point it will pick up a feather or a small amount of iron
> filings or, if neither are available, make your hair stand on-end, it's a
> poor secondary former. This is only relevant to plastics; when using a
> cardboard former, it can be easily charged after you've baked/dried it
> and/or coated it.
>
>
> Good luck and Happy Coiling!
>
>  - Christopher Karr
>
>
> To: juliustc81@xxxxxxxxx; tesla@xxxxxxxxxx
> From: the_iconoclast@xxxxxxxxxxxxxx
> Subject: Re: [TCML] watcha think?? COMPLETED Tesla COIL :)
> Date: Mon, 9 Aug 2010 07:03:17 -0700
> CC:
>
> I used black pvc from Lowes and it worked fine.  Someone explained to me
> that its the dye.  Apparently, some black pvc dyes use carbon as a pigment.
>  The pvc I bought from Lowes was ok.
>
> Sent from my HTC on the Now Network from Sprint!
>
> ----- Reply message -----
> From: "Julius Crummer" <juliustc81@xxxxxxxxx>
> Date: Sun, Aug 8, 2010 8:11 pm
> Subject: [TCML] watcha think?? COMPLETED Tesla COIL :)
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
>
> Wow i never knew im supposed to get a certain color...well this is gonna
> have to
> work at least for 2 or 3 runs. At Lowes they was out of shorter white ones
> and i
> couldnt afford nor fit a 8 feet long white pvc pipe hehe. I tested the
> spark gap
> using only the NST across them and all the gaps fired. I used 14 gauge wire
> all
> around only because it call for that size in the instructions i was
> following.
> Well im halfway winding the secondary by hand and once i get the variac
> imma
> plug it up and cross my fingers. thanks for the info.
>
>
>
>
> ________________________________
> From: Scott Bogard <sdbogard@xxxxxxxxx>
> To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
> Sent: Sun, August 8, 2010 2:07:52 PM
> Subject: Re: [TCML] watcha think?? COMPLETED Tesla COIL :)
>
> Is that black PVC?  Because if it is you should look for white, I've
> heard bad things about the black with carbon in it...  Otherwise it
> looks like it will function for testing, use heavier wire in the tank
> circuit long term, and shorten your connections.  Also I hope your spark
> gap is adjustable and that you didn't make it too big, I've no
> experience with that type so it is probably Ok.  Can't wait to see sparks!
>
> Scott Bogard.
>
> On 8/8/2010 5:11 PM, Julius Crummer wrote:
> > Well heres the completed tesla coil minus the secondary winding and the
> NST is
> > off to the side...check out the counterpoise..looks kinds sketchy huh?
> >comments,
> > advise are welcomed :)
> >
> > http://www.flickr.com/photos/39213193@N03/4873176176/
> >
> >
> >
> >
> > _______________________________________________
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> >
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