RE: My 4 inch tesla coil - part 2

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "earl rhodes" <earl_1975@xxxxxxxxxxxxx>

hi eric and all
have you considered the pvc pipe method of primary construction it 
really does make it easy you know !! so its not brilliant, but i 
think youll find that once youve done it this way you just apply the 
same principles to other materials  its just the same  and it doesnt 
have to cost any thing extra you can find grey water pipes everywhere 
gregs garage tesla coil site has a very easy to follow description of 
how to do it , just remember to make more distance between you 
primary and secondary,  ive had serious regrets for not doing so and 
all it takes is just that little bit extra space
dont forget that if its arcing to your secondary  like that  your 
supply is going to die , oh and just in case you put an inner strike 
rail (a good idea) make sure it  isnt a shorted turn... i find these 
things out the hard way!!  my "cup" strike rail  got so hot around 
the rim i could smell it from the other end of the garden and another 
melted patch on my coil ( not serious ) cosmetic i know but i am all 
about how this coil looks as its mostly bits and pieces, bar of 
course the maxwell cap,
for gregs primary method goto the improved junkbox coil and youll find it,
nice sparks by the way
regards earl
> From: "Tesla list" <tesla@xxxxxxxxxx>
> To: tesla@xxxxxxxxxx
> Subject: My 4 inch tesla coil - part 2
> Date: Mon, 16 Apr 2007 12:27:10 -0600
>
> Original poster: "Hydrogen18" <hydrogen18@xxxxxxxxxxxxx>
>
> I've made the suggested improvements to my primary coil, which you 
> can see here:
>
> <http://www.hydrogen18.com/projectlogs/hivolt/4inchtesla/>http://www.hydrogen18.com/projectlogs/hivolt/4inchtesla/
>
> and the results here:
>
> <http://www.hydrogen18.com/projectlogs/hivolt/4inchtesla/4_15_2007/>http://www.hydrogen18.com/projectlogs/hivolt/4inchtesla/4_15_2007/
>
> Questions arising from such:
>
> - I've got rather active arcing from the primary to the secondary 
> now. How do I solve this. More layers of shellac on the secondary? 
> Even if I eliminate the breakout point from the secondary that I 
> unintentionally created, I think it's just going to arc from the 
> first turn to the secondary.
>
> - Is there any hope of repairing the secondary? Although it has tiny 
> burnt spots on it, it doesnt seem dead yet..I'm getting pretty good 
> performance. No shorted turns im guessing. Can I sand the carbonized 
> areas off with high grade sand paper before re-shellacing?
>
> - Before anyone mentions it, yes I'm still using the same terrible 
> spark gap. I don't think that's much of a concern at the moment 
> given my other problems.
>
> Eric

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