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Re: Great sparks! Then....
In a message dated 3/3/99 2:35:20 AM Pacific Standard Time, tesla-at-pupman-dot-com
writes:
>
> Well, thanks to everyone for the help getting my new 6" TC running.
>
> I decided to run more power and the second cap I built, since I couldn't
> tune with just one. I got it tuned up and got up to a good power level,
> the sparks were looking good. Then, I got some interesting buzzing from my
> cap. *sigh* One of them blew. Well, I learned a lot doing it, so it's not
> a total loss. But no more sparks for a while, have to build more caps. ;)
>
> One question, durring my higher powered runs I noticed something I had not
> seen before. I kept getting a small arc from my secondary ground wire to
> the inner turn of the primary. This happened at the higher power levels. I
> tried putting some poly in the way, but that didn't help.
>
> Do I need a larger inner turn on the primary? Or am I missing something
> here? I'm a few turns in from the outside on the tap, so I could loose a
> turn or two from the center and retune still. It's a 6" secondary with a
> flat spiral primary, inner diamater on the primary is 8".
>
> Travis
>
Travis,
Congratulations on getting your 6" coil up and running. Too bad about your
cap. I have blown a few myself. I have a 6" coil that I run at about 7kva
with a flat spiral primary set so the lowest turn of the secondary is at the
same level as the primary. The inside diamter of my primary is 9.75" - so I
have about 1.75" clearance, and have never had a problem with arcing.
Ed Sonderman