Re: lil help please

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Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

Hi Jimbo,

Use 1/4 inch refrigerator tubing that is already coiled.  Make 8 
supports for the copper tubing where the holes for the tubing are 
drilled on appropriate centers thru the support material and then the 
support is cut thru the holes slightly off center so the resulting 
hole looks like a "C". The tubing then snaps into place as you unwind 
the original coil.  Expand the original coil as you go and snap into 
place only enough to match the curvature of the mounted 
supports.  Here is a picture of my primary coil for a 2KW power 
source to give you an idea.

http://www.hot-streamer.com/temp/GerryReynolds/15KV_120ma_SRSG/tc18_primary_coil.jpg
http://www.hot-streamer.com/temp/GerryReynolds/15KV_120ma_SRSG/tc19_primary_coil.jpg

The material I used was HDPE.  I would determine ahead of time how 
many turns you need using one of the online tools such as JAVATC and 
then plan on having maybe 4-5 extra turns.  I have 20 turns on my 
primary which makes it fairly big, but I can add more topload and 
have the extra turns to retune.

Gerry R.

> Original poster: Jimbo07031982@xxxxxxx
> i am getting ready to build my 2nd t.c and was wondering what is the 
> best way to form a primary coil (the first one i every built was 
> just literally thrown together the primary was formed by hand and 
> looked like crap turned out it was crap too) is there any tools that 
> would help in the forming of this to make a nice uniform coil and 
> what would be the best thing ti use (the first one i built i used 
> 3/8 inch copper tubing should i go bigger or smaller) i do have some 
> electronics background but not much and i am horrible at math 
> because of this i am having some trouble designing and building a 
> good coil (if there is anyone willing to help through this step by 
> step please let me know of list at 
> <mailto:jimbo07031982@xxxxxxx>jimbo07031982@xxxxxxx) Also I hope to 
> be in FL for the 2005 teslathon I am moving down just as soon as I 
> finish taking care of some things up here in Ohio. Hopefully I can 
> get some good pointer's and idea's if I am able to make. thanks a bunch. JIMBO
>
> p.s I will be using a 6kv 30 ma nst to power the whole thing and 
> have 6 400pf 30kv caps in parallel and are ceramic doorknob style I 
> do have a variac that I use that goes up to 140v ac.
> also the first coil i built i connected the primary and secendary 
> coils together would this cause a lose in performance and i did not 
> seal the ends of the sec, coil at all like i said i just threw the 
> thing together to see if a could get something to work altogether i 
> think i spent $50 building the whole thing besides the obvious flaws 
> with the sec. what can i do to get spark's bigger then 4-6 inch long 
> seeing as that is the biggest i was able to get.(do i need more v or 
> is what i have sufficent i am aiming to get at least 20-24 inch 
> sparks out of my next coil