Re: [TCML] Still stuck at 36"

[DC Cox <resonance@xxxxxxxxxxxx>]

The answer to your frustration, I suspect, is poor quenching.

Make up a simple hyperbaric sparkgap (vac. cleaner motors are free from a
local large vac cleaner repair shop it you haul along your kid, take a few
photos with you, and declare you need it for "the kid's school science
project".  About $12 worth of fittings from a large local hardware store,
and your sparks should
increase substantially especially with the MMC caps.

I'm sending you the plans off-list.

I've never seen a small or medium size coil in which the performance does
not increase substantially with the use of a hyperbaric sparkgap.
Lots of air --- real fast rules!

Dr. Resonance






On Sat, Jan 24, 2009 at 5:16 PM, Bill Bohn <b.jbohn@xxxxxxxxxxx> wrote:

> This still will not do more than 36-40". I have put together a mmc cap
> bank.
> The caps are cornell  dubilier  942c20p15k 2000vdc .15mfd
>
> I assembled them 10 series -6 parallel.I have 6 rows. I can adjust  for 1
> string,up to all 6.Still 7500v@xxxxxxxx seems best with 3 strings
>
> I have spun another secondary coil that's 6.625 sch 40 pvc wound 1060
> turnes.The spark output is about the same as my 5.25 coil with 1607 turnes
>
> I have used various top loads.The 6.625 coil seems best with a 4.5x18
> toroid
> with a 7" sphere on top
>
> Am I under powered to drive a coil at 6.625?
>
> I have the same spark gap described in( stuck at 36)
>
> Thanks much from the frustrated.
>
>
>
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