RE: Toroids, point taken on flex duct:-) I did want a better "toroid"

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Jim Mora" <jmora@xxxxxxxxxxx>

Terry,

What size gazing balls are you using and did you have to have the
rod/sleeves machined? I know you described the building of these and
drilling and attachment awhile ago, I'm not sure where to find it. You have
copious documentation!

Ok, so can you give us a hint, what lenght arcs will your dual MOT make?

Thanks,
Jim Mora


-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: Friday, March 02, 2007 7:35 PM
To: tesla@xxxxxxxxxx
Subject: Re: Toroids

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
.........