Re: [TCML] Lacquer

[Rob Byron <mustang_5l87@xxxxxxxxxxx>]

Phillip, 
How do you get your epoxy so crystal clear? I use a two-part epoxy ( not cheap stuff) and it allways ends up foggy looking because of microsopic bubbles. I use a 24h cure and have it set up on a rotating assembly with a microwave turntable motor. Is it how you mix it that matters? Or how you apply it?  Your coils look amazing by the way!

Rob. 

________________________

On 2010-04-08 09:33:32 -0600 Phillip Slawinski <pslawinski@xxxxxxxxx> wrote:

> 
> 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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> 

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