Re: Toroids

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Terrell Fritz <terrellfone@xxxxxxxxxxxxxxxxxxxxxxx>

Hi Dave,

Here is the corona spraying off the top terminal with the balls just 
below breakout with the balls way too high...

http://drsstc.com/~piranha/p-2/bttl/BallTest-3.JPG

The spray was very even and nice as expected in such a case.  The 
balls really do have a very toroid like field pattern.

http://drsstc.com/~piranha/p-2/bttl/newcoil-00.jpg

http://drsstc.com/~piranha/p-2/bttl/newcoil-01.jpg

The balls are mounted by tubes that can slide in and out an a spider 
frame to adjust major diameter:

http://drsstc.com/~piranha/p-2/bttl/BigSpheres.JPG

http://drsstc.com/~piranha/p-2/bttl/TerminalTuning.JPG

http://drsstc.com/~piranha/p-2/bttl/TerminalTuning.gif

Waterscapes, Krupps,...  I hope we are not killing these venders with 
giant orders like we did with MMCs and IGBTs ;-)))   I think Krupp's 
is out of bare stainless steel balls now too =:O  I sure am glade "I" 
get mine "first" ;-)))

BTW - The new PIRANHA site is pretty much back all "rearranged" 
now...  It took me "all day" (I am not good at web page 
stuff...)  Sorry, but I think I killed the old links in this thread...

http://drsstc.com/~piranha/

Hopefully this will be a more well thought out and stable site...  I 
hardly wrote anything down for the OLTC...  Probably wrote "too much" 
down for PIRANHA...  But the new site should be easily maintainable 
and extendable even for "me" :-p

I should try to make an index of the pictures next...

BBTW - Here are my 4 inch and 8 inch big dryer duct top terminals now :o))))

http://drsstc.com/~piranha/p-2/bttl/OldDryerDuctTerminals.JPG

Cheers,

        Terry






At 05:02 PM 3/2/2007, you wrote:
> Original poster: "Dave" <dgoodfellow@xxxxxxxxxxxxxx>
>
> How do you expand a ball? I find that toroids do better at 
> controlling corona at the top turns of the secondary, where balls 
> need to be placed as low as possible, at the top of the secondary. A 
> coil would look great with an insulator between the secondary and 
> the ball, but the corona becomes unmanagable.
> By the way, since Waterscapes stopped selling gazing balls at the 
> nice price, I have found the best overall price and service from Amazon.com
> Best price for an 8" is from artywoods on ebay. Don't look up 8" 
> though, search stainless gazing, and you will see his 7.65" gazing 
> ball for about $18.00
>
> Cheers, Dave Goodfellow
.........