Re: Some first coil questions

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Glen McGowan" <glen.mcgowan@xxxxxxxxx>

I used a mixture of techniques.....I have a 4" secondary as well. I 
used two 3" caps at each end of the 4" PVC pipe. The 3" caps will fit 
"inside" the 4" pipe with a small amount of sanding.

For securing the topload I'm using a nylon bolt. For securing the 
bottom of the coil to the base on the other hand, I'm using a 2" 
brass bolt.  The goal is to keep the secondary wire and any metal 
conductive objects out of the inside of the secondary form. Well, in 
my case I wanted something hefty and conductive to bolt to a nice 
heavy ground. Nylon in my opinion would not have cut it so I used a 
brass bolt. In order to insulate the head of the bolt from the rest 
of the inside of the coil form I took four or five 1/4" laxan disc's 
and expoxied them together then glued them over top the brass bolt head.

On my coil the brass bolt head sticks through the top portion base 
where I then use a nut to secure a copper lug (similar to 
<http://www.electricmotioncompany.com/view.php?dbt=powercat&sub=Terminal%2520Lugs%2520-%2520Single%2520Terminal%2520Lug>this). 
The wire from this lug runs down and gathers up all the grounds (not 
mains ground!) coming from the Terry's Filter etc and then terminates 
to another lug on the bottom of the other base.

I'll have to snap a current picture. I just finished actually wiring 
mine up lastnight. Let me know if you want a pic.


As far as sticking the coil wire through the PVC and into the inside 
of the cap. To avoid doing this I cut a small channel (like a 
drainage ditch) into the cap. Layed the wire in the channel and 
covered over it with hot glue. I only made the channel deep enough to 
lay the wire in...I did not puncture the cap.




On 10/2/06, Tesla list <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx> wrote:
Original poster: John <<mailto:guipenguin@xxxxxxxxx>guipenguin@xxxxxxxxx>

Well... I guess I'll just get a flat 4" PVC pipe cap, and put a bolt
up through the center through my base......and then have the
secondary wire go through the side through a small hole?

On 10/2/06, Tesla list 
<<mailto:tesla@xxxxxxxxxx><mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx> wrote:
Original poster: John 
<<mailto:guipenguin@xxxxxxxxx><mailto:guipenguin@xxxxxxxxx>guipenguin@xxxxxxxxx>

I have decided to go with a 4" diameter secondary for the increased
inductance over a 2" pipe which was my initial plan.

My Pipe will be a nice washed, sanded and coated PVC pipe. What do
you guys do for the secoundary coil's wire that should be attached to
RF ground? how do you fashion this wire so that its clean and away
from the primary coil? I was thinking of making a small circular
table and have the pipe go down through about 4 inch and have the
beginning of the secondary coils wire go through a hole in the
pvc...down the pipe and have a thicker wire going through a cap at
the bottom......and then hook that to RF ground....Im not sure.

What do you guys do in construction for hooking up the bottom lead of
the secondary coil?

-John P.