Re: Gazing Ball top load,....

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "david baehr" <dfb25@xxxxxxxxxxx>


Maybe just raise the sec. up just a bit ? Maybe lay a pie pan in the 
center of the balls ?..as far as the top turn corona, I adjusted the 
wire spiral up to the topload out , so it takes the brunt of abuse, 
yor saying go down (inward ) with my pri. tap ? just a bit





From:  "Tesla list" <tesla@xxxxxxxxxx>
To:  tesla@xxxxxxxxxx
Subject:  Re: Gazing Ball top load,....
Date:  Sat, 25 Nov 2006 15:37:37 -0700
>Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>
>
>Hi David,
>
>I've really enjoyed your pics. Very nice topload! As I've mentioned
>with Terry's topload, I suspect there is to be some amount of corona
>off the top secondary. I know the field stress plots show all is
>good, but this particular configuration is new construction, so it
>makes for a good cross check for field plot against reality.
>
>I think you can eliminate the top secondary small sparks by
>adjusting the topload spheres a little closer inward and/or slightly
>lower (inward would be my first choice). I still believe a center
>disc or flat ring to enhance top secondary shielding is a good idea
>and could even enhance the "coolness" of the look.
>
>Adding the epoxy to the pin holes is a good idea but may not
>eliminate the breakout. Sounds to me from your description is that
>the coil could be better tuned from a smooth running perspective.
>Gerry mentioned a little more L in the primary and I would agree. A
>little detuning to bring the primary frequency down a few percent is
>a helpful adjustment and one I think should be tried before anything
>else.
>
>Take care,
>Bart
>
>Tesla list wrote:
>
>>Original poster: "david baehr" <dfb25@xxxxxxxxxxx>
>>
>>I got a chance to run it at night, now I can see a bit of corona
>>off the top winding of the sec. Also, had a couple of break out
>>sparks out the coil, one about half way up, and another about 3/4
>>of the way up from the bottom, not racing sparks, just very small
>>,...maybe from previous damage from months before when I hooked up
>>a rotary.  I put a little epoxy on thoeses small pin holes on the
>>sec., hope it helps But the coil is really running well, other than
>>that.........I didnt notice the small sec . sparks before, With the
>>smooth balls holding off the breakout a bit more than the dryer
>>duct , would that put more stress on the secondary winding ??
>>
>>