Re: Dissapointing and confusing Results with MMC

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <FutureT-at-aol-dot-com>

In a message dated 2/12/02 9:54:50 AM Eastern Standard Time, Par pp 807 writes:

CJ,

I might add also that a larger value cap will give a lower voltage on the cap,
so you have to adjust the gaps a little narrower usually to make sure
they fire steadily.  When all is adjusted and tuned, along with resistors,
and soldered MMC's, all should be well.  Onward to success !

Cheers,
John

>
> >  >
> >  > After my other cap died on me (35kv .035 uf) I decided to upgrade to an 
> > MMC
> >  > which I built to 18 kv .05 uf tested at .046. My primaries are 2 NST's
> 9kv
> >  > 60ma each. After hooking up the new cap, I had shorter sparks and it
> >  > operates very inconsitently. Maybe 1/5 times it works, 4/5 times it
> makes
> >  > this buzzing noise and then I turn it off, turn it on, etc. Another
> thing 
> > is
> >  > that when I ground the primary and secondary, the coil doesn't work at
> all
> >  > and doesn't making the buzzing noise. With the old cap I had about 20
> inch
> >  > sparks(measured to ground), and with the new (i'm guessing) about 8-12 
> > inch
> >  > sparks. I should also note that I do not have a terry protection circuit
> >  > installed, nor do I have any real resistors in the MMC (Instead I just
> >  > hooked up the leads from each cap with folded peices of tin foil).
> Please
> >  > Help
> >  >
> >  > CJ
> >  
> >  
> >  
> >  
> >  CJ,
> >  
> >  Since your coil was running well with a .035 mfd cap, I assume that you
> >  re-tuned it when you switched over to the .046 mfd mmc cap - correct? 
> Your 
> > mmc
> >  caps must be soldered together and I would add resistors across each cap. 
>
> > This
> >  keeps the stress on the caps evenly divided and will discharge the mmc
> when
> >  power is removed.  Are the mmc caps that you used know to be ok in this
> >  application?
> >  
> >  Ed Sonderman
> >