Re: [TCML] Lacquer

[Phillip Slawinski <pslawinski@xxxxxxxxx>]

This is a DRSSTC.  I don't have a specific parts list or schematic for this
coil, and I'm hesitant to make that information public due to the amount of
work I've put into this project.  It is similar to Steve Ward's DRSSTC 4
that he has published on his site. http://www.stevehv.4hv.org/DRSSTC4.htm
Some notable differences include the larger top load, different secondary
dimensions, and much larger IGBTs.  The picture I posted earlier was with
the coil using 150A IGBTs, presently the coil is being rebuilt and will have
300A IGBTs.

On Thu, Apr 8, 2010 at 10:04, <jhowson4@xxxxxxxxxxx> wrote:

> Really nice coil, are you using a solid state spark gap? I could not tell
> in the pictures of the base insides. I would love to see a schematic and
> parts list?
>
> Thanks,
> John "Jay" Howson IV
>
> ----- Original Message -----
> From: "Phillip Slawinski" <pslawinski@xxxxxxxxx>
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Sent: Thursday, April 8, 2010 10:16:53 AM GMT -05:00 US/Canada Eastern
> Subject: Re: [TCML] Lacquer
>
> Hi All,
>
> I too use the two-part epoxy coating on all my coils. I built a coil from
> the ground up to produce a long spark length compared to the secondary
> length. It has taken a lot of work, but I think the results were worth it.
> http://www.flickr.com/photos/pslawinski/4354745760/ During the process of
> developing this coil I have had multiple flash overs.
> http://www.flickr.com/photos/pslawinski/4309814799/ I haven't lost a
> secondary to a flash over or spark related event. My secondary is wound
> with 34 AWG on a 12" x 3.5" form. Not coating a form with such fine wire is
> simply not an option. The wire is very fragile, and will break with only a
> mild amount of force, also with wire this fine expansion and contraction of
> the form due to temperature change will cause the windings to loosen up and
> fall down. Sadly, I know this from experience.
>
> -Phillip Slawinski
>
> On Thu, Apr 8, 2010 at 08:22, Peter Terren <pterren@xxxxxxxxxxxx> wrote:
>
> > Firstly, the experiment with the conventional coil is not conclusive,
> > sorry. Power was "about 20%" in the pre shot with racing sparks. No
> mention
> > of actual values for the post shot and the sparks look very different on
> the
> > pics.
> > I am not saying the result is wrong, but it is highly likely the original
> > power level was not reproduced.
> >
> > Secondly, DRSSTC's are different beasts in terms of coupling. Obtaining
> > better Watt's ratios (spark length/sec length) seems a lot easier. 13:4 =
> > 3.25 does not seem remarkably efficient in this regard.
> > On the other hand using an SGTC coil with no special insulation, I have
> > Watt's ratios of 3.0 (96inches/32in). Others have claimed larger ratios
> for
> > SGTC's but I have not seen clear photos to show this. If you want to
> follow
> > this link copy and paste it into your browser.
> > http://tesladownunder.com/tesla_coil_sparks.htm#6 inch coil (the best
> > ones)
> >
> > Nevertheless, the previous discussion of using ?Envirotex as a very thick
> > layer does really seem to provide a lot of protection.
> > Some years ago I started a TC project to dramatically outperform this 3.0
> > Watts number. A lot of special fabrication was done and I still have
> > everything ready to start some final plans and construction. One day when
> I
> > have a few moments........
> >
> > Peter
> >
> >
> >
> >
> > On 8/04/2010 1:16 PM, Dr.Hankenstein wrote:
> >
> >> Greetings,
> >>
> >> If you're not too sure on the effects of a good coating (or two or
> >> three) of varnish; please refer to a scientific evaluation on the
> >> following link:
> >>
> >> http://www.audiotesla.org/corona%20experiment.htm
> >>
> >> This should remove all doubt that varnish does more than just hold the
> >> winding in place and end the hypothetical armchair speculation. Dr.
> >> Spark has at least 80 coats of varnish on "Fatboy"---13+ footers out of
> >> a 4 foot secondary proves it:
> http://www.drspark.org/fatboy1_rebuild.htm
> >>
> >> Regards,
> >> Hank
> >>
> >> _______________________________________________
> > Tesla mailing list
> > Tesla@xxxxxxxxxx
> > http://www.pupman.com/mailman/listinfo/tesla
> >
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