RE: First Light but I have a Problem

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

Original poster: "EMMETT SECREST" <secrest2032-at-msn-dot-com> 

I thought I had solved this problem with a smaller toroid but last night I 
discovered I was wrong. I was still getting corona build up and some arcing 
at the top of the secondary and off the PVC fitting mounted on top of the 
secondary form. At one point I was get large streamers right off the side 
of the PVC fitting. I removed the fitting and replaced it with a wooden 
(oak) plug in the top of the sec. form. I no longer had any corona build up 
or arcing. It dawned on me that in my haste to get my coil built.  I had 
not dried or coated the fitting with varnish.  I believe the cause of the 
problem may be water absorption by the fitting. Does anyone concur with 
this?  If not what other ideas do you have.  To put it better, the PVC 
fitting was acting like the toroid and the toroid was doing nothing. On the 
good side I was getting some really nice streamers off the coupling.

Emmett


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: RE: First Light but I have a Problem
>Date: Wed, 17 Dec 2003 11:43:12 -0700
>
>Original poster: "EMMETT SECREST" <secrest2032-at-msn-dot-com>
>
>I lowered the Toroid an inch but still had the problem of arcing around 
>the top winding of the secondary. The bottom of the Toroid is now about 
>six inches above the top winding of the secondary.  What is the general 
>hieght of the bottom edge of the Toroid above the top widing of the secondary?
>Also is a 23" major diameter by 4" Toroid to large for a 12KV/60mA coil?
>The reason I ask is I was thinking that maybe the Toroid is so large that 
>I cant provide sufficient breakout voltage to the toroid and the available 
>power has to go somewhere so it breaks out from the top of the secondary.
>
>Thanks for your help.
>
>
>>From: "Tesla list" <tesla-at-pupman-dot-com>
>>To: tesla-at-pupman-dot-com
>>Subject: RE: First Light but I have a Problem
>>Date: Sun, 14 Dec 2003 19:43:07 -0700
>>
>>Original poster: Thomas <tom-at-pwrcom-dot-com.au>
>>
>>Emmett, any discharge you see at the top of the secondary is not good. It
>>will decrease the spark length from the toroid, and possibly damage your
>>secondary windings.
>>
>>You need to lower the toroid closer to the top of the secondary.
>>
>>Tom.
>>
>> > Original poster: "Emmett Secrest" <secrest2032-at-msn-dot-com>
>> >
>>_snip_
>>
>> >My problem is that when I remove the nail form
>> > the surface of
>> > the Toroid I get some arcing from the top of the secondary
>> > column.  I have
>> > a PVC adapter on the top of the secondary that reduces it
>> > from 4" to 2"
>> > with a piece of 2" PVC elevating the toroid about 4" above
>> > the windings on
>> > the secondary.
>>
>>_snip_