From: "Tesla list" <tesla@xxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: lil help please
Date: Sat, 15 Oct 2005 06:05:28 -0600
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