Re: toroid size

["BunnyKiller" <bigfoo39-at-xxxxxxxxxxxx> (by way of Terry Fritz <twftesla-at-xxxxxxxxxx>)]

Tesla list wrote:

> Original poster: "Michael Deegan" <mdeegan-at-mediaone-dot-net>

Comments interspersed (spelling?) between

>
>
> Youve probably read about my 6" coil in the previous days posts...
> The toroid i orignally made was 3.5" X 20.5"  But i could only draw inch
> long arcs from it. it is powered by a 12/30 trannie.

I find that a toroid min dia = sec dia. is good ( 6" sec = 6" toroid) the
wide dia ((total = 2/3rds of sec length))
sooo.. if you have a 6"X 24" sec   toroid = 6" X 16" od. X od.

> im constructing a
> MMC to replace my cureent saltwater caps. Does the height of the toroid
> above the secondary matter arc-length wise??? When i get my new 15/60
> trannies can i go back to using my old toroid??? is it just too big for
> my coil???

i find that the height of the toroid will determine the performance of the
spark...   if it too close to the secondary ( less than 1/2 the dia of the
secondary) (( if you have 6" secondary and the toriod is at 3" or less
above, you will see more secondary flash-over))  if you place the toroid
about 100% ( 6" secondary = 6" above) performance is better.

>
>
> find out on the next episode of the mailing list....
> no, really... i need help... i got 6-8" arcs from my fist-sized potatoe
> of light, but i was drawing some heavy corona off the top of the
> secondary...

seems that you need to tune your coil a bit more (optimal performance for a
12/30 should be about 24- 36" with minimal caps (( salt water/ home mades))
with a MMC or a comercial cap ... 40"

tuning is critical  as i have found out , even .1 turns can make a world of
difference.

Scot D