Re: [TCML] Still poor performance

["DC Cox" <resonance@xxxxxxxxxxxx>]

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:

> Thanks to all your help and advice in my thread "Toroid Problems".
> However, my coil is still performing very poorly.  My 9/30 NST is
> putting out 7 inch sparks at the very best.  Here are the improvements
> I've made.
>
> 1.  I've made all connections more secure.  I am using terminals and
> bolts to make connections to my spark gap instead of cold solder joints.
>
> 2.  I've shortened all connections in the primary circuit by building a
> stand/cabinet for the coil.
>
> 3.  I've upgraded all the tank wire to 10 gauge stranded copper wire.
>
> 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.
>
> 5.  I made a new primary tap.  I bought two small metal fuse clamps and
> soldered them together.  They seem to work perfectly.
>
> 6.  I build a smaller toroid.  It looks like crap (clothes hangars +
> paper mache + Al foil), but at least I'm getting some breakout.
>
> With the new toroid on, I'm lucky to even get a 1 inch breakout.  I
> made a breakout point by resting some spare 1/4" copper tubing on the
> top of the toroid and got about 4-5" sparks.  Without the toroid on,
> I'm getting 7" sparks at the absolute best.  Any suggestions?
>
> One side question, does it matter how I connect the primary coil to the
> circuit?  The inside of my primary is connected to my MMC and the outer
> tap is connected to the spark gap.  Is this significant?
>
> Thanks
>
> Nicholas Goble
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