Re: [TCML] Lacquer

[Phillip Slawinski <pslawinski@xxxxxxxxx>]

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
>>
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