Re: Mirror Ball as VDG Sphere?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>" <davep-at-quik-dot-com>

>  DWP: drill a  guide hole (yes it will be rough) then

> punch your hole with a GREENLY

	Greenlee
	Uhuh.  I have 'several'.
	As noted, they require access to both sides of the
	piece.

> HOLE PUNCH.  The punch is costly for just one hole, but it

> will make a clean hole every time. You can get the punch

> from 3/8" to 4" so you can plan your size neaded. I role

> the edge with a hard wood cone in a fast
> drill. It smokes and stinks, but it works well.

	Hmmmmm.  rather like spinning the metal.  The
	radius needs to be large to avoid corona losses.



>>Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>"
>><davep-at-quik-dot-com>

>>>I got this link from this list awhile back:
>>>
>>>http://www.waterscapesweb-dot-com/orbs.html
>>>
>>>I was eye-balling the stainless steel "mirror balls"
>>>as possible TC discharge terminals, but I've had mixed
>>>results using spherical terminals. The sphere doesn't
>>>seem to shade the top turns the way a toroid does, and
>>>the breakout goes any which way, including back to the
>>>base of the secondary! Plus, it causes problems with
>>>breakout from the top turns. Anybody getting good
>>>results with spheres?
>>>
>>>Now what about a VDG terminal?
>>>
>>What KIND of VdG terminal?
>>All manner of terminals have been used:
>>Spherical
>>modified spherical with curved re-entry,
>>'donut' (Torus)
>>'drum' with spherical top and curved
>>'half toroid' bottom.

>>>I was thinking I could hire a machinist to bore a nice
>>>round hole in one of these Lawn Balls?
>>>and have myself a professional-looking VDG sphere.

>>>However, I anticipate trouble with corona
>>>leakage at the rim of the entry hole, since it would
>>>not be beveled inward.

>>Yep.  I would expect problems.  Professional
>>VDG spheres have carefully crafted reentrant
>>radius surfaces.


-- 
	best
	dwp

...the net of a million lies...
	Vernor Vinge
There are Many Web Sites which Say Many Things.
	-me