Re: [TCML] Still poor performance

["DC Cox" <resonance@xxxxxxxxxxxx>]

Certainly we can't see the coil, but the builder has provided important
clues.

If he is not using MMC type caps, that could definitely be a problem.


No, it's not really rocket science  --- just an observation I made based on
the information provided and my 49 hrs experience as a coil builder.

After reviewing all the changes he has made, the only remaining problem area
would be the spark gap.

Nicholas could test this theory in three ways:

Use a shop type air blowgun to blast some high pressure air thru the gap.

or

Substitute a parallel copper pipe which would provide better quenching.

or

Use a simple to construct and very cheap hyperbaric spark gap.  Most vac.
cleaner repair shops would donate an old one for a science project.

I'm better either would produce substantial gains in his coil.

Nicholas --- please advise on your results.

Dr. Resonance

On Thu, Aug 21, 2008 at 9:02 AM, Lau, Gary <Gary.Lau@xxxxxx> wrote:

> That's a broad and assuming statement to make, considering that we can't
> see this coil, and that the experience of many is that single gaps do work
> very well.  The important thing is that single gaps, particularly for medium
> and higher power coils, require more than just a casual airflow through the
> gap spark channel.
>
> Nicholas, please describe the airflow through your gap?  If there is
> minimal or no forced airflow, you will see a huge improvement by fixing
> that.
>
> Regards, Gary Lau
> MA, USA
>
> > -----Original Message-----
> > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> > Behalf Of DC Cox
> > Sent: Thursday, August 21, 2008 10:46 AM
> > To: Tesla Coil Mailing List
> > Subject: Re: [TCML] Still poor performance
> >
> > It's the single electrode spark gap that is killing your coil's
> performance.
> >
> > Go to a 5 gap parallel pipe spark gap with a 300 CFM blower fan, or, for
> > even better performance, use the hyperbaric spark gap.
> > If you send me an email off-list I can send it to you.  Very simple and
> > provides optimum performance for any nst type coil.
> >
> > Dr. Resonance
>
> On Wed, Aug 20, 2008 at 9:58 PM, Nicholas J. Goble <ngoble@xxxxxxx> wrote:
>
> > 4.  I built a new spark gap.  Instead of the multiple spark gap, I am
> > now using a single electrode spark gap.  The electrodes consist of two
> > pieces of copper pipe.  I think that this gap is easier to adjust than
> > my previous gap, and as a result, quenches better.
>
> <snip>
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