Re: [TCML] Still poor performance

[CONOR WHYTE <cjwhyte@xxxxxxx>]

I forgot to mention this.
have you noticed any sputtering from your coil?
If not (hmm thinking) check your ground? I don't know what else it could be.
Why don't you take a video of it running that way we can all see it in action.




nce
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>

> Hi Nicholas,
> 
> Sounds frustrating. Since the beginning I pointed at the gap 
> (mainly due 
> to this being the biggest area of problems). I know your using 
> .0125uF 
> MMC CD caps and I know your specs. The tuning really should be 
> at 9.6 
> turns with the larger toroid. The two gap arrangement I assume 
> are the 
> same cylinder size previously used (1" diameter). Gap spacing 
> should be 
> just under 1/4" (about 0.22") with 2 cylinders.
> 
> Feel the gap electrodes after running and grounding out the MMC 
> to check 
> for temperature. How hot is it? Too hot to keep your fingers on? 
> If it's 
> warm but not hot, and if the coil is tuned, I have to wonder if 
> the 
> secondary has some carbon track under the windings (not visible) 
> or even 
> a shorted turn. Something is robbing power.
> 
> I personally would not add another gap type or different 
> component at 
> this time. The components you have are adequate. It's a matter I 
> think 
> of finding where the loss is. Regarding the primary connection 
> you asked 
> about. My coil is wired just the opposite. It really shouldn't 
> matter, 
> but it's something you could easily check to put it out of your mind.
> 
> Basic 
> hookup:             Toroid
>                           0----0
>                             (
>                 Cap         (
> N--------O-------||-------) (Sec
> S       
> Gap            Pri) (
> T--------O----------------) (RF Ground
> 
> 
> Best regards,
> Bart
> 
> Nicholas J. Goble 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
> > _______________________________________________
> > Tesla mailing list
> > Tesla@xxxxxxxxxxxxxx
> > http://www.pupman.com/mailman/listinfo/tesla
> >
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
> 
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla