RE: building primaries

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

Original poster: "Ted Rosenberg by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Ted.Rosenberg-at-radioshack-dot-com>

Hi RQ:
Of all the operations I did in constructing my 900W coil (using a 15/60 NST)
the worst was making the primary. I reviewed many techniques.
Those techniqes basically came down to those who drill holes in HDPE and
thread the copper tubing through or thoses who make holes/slots in the HDPE
and insert the loops from above then secure the loops using anything from
nylon tie downs to nylon machine screws and such.
I found the threading to be more esthetically pleasing and so I brought the
precut strips of HDPE I cut at home to the office where I used the company's
drill press to make the 5/16 diam holes (always slightly larger) in the
correct sequence (available from a post from last year). Then I took them
home and mounted the strips radially on my "primary platform using nylon
screws."

My primary was to be about 16 turns of 1/4 regrig tubing going from 7.5 inch
diam out to about 21 inch.

I began threading from the outside to the inside which I was told is
preferred.

The first 4-5 loops were easy.
The 6th was slightly more difficult. By the 8th turn I was sweating like a
mop and cursing like a sailor in a Popeye cartoon.
By the 15th loop I had 2 blisters.
But I finished.

The photo of early in the process can be seen aat:

http://www.flash-dot-net/~ford29/tesla/primary.jpg


This is the one part of building another coil which has me hesitating.

I hope my comments haven't scared you away. I'm still glad I opted to
thread.
And the coil works great!

Safety First

Ted

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Tuesday, June 26, 2001 10:15 PM
To: tesla-at-pupman-dot-com
Subject: building primaries


Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<RQBauzon-at-aol-dot-com>

when trying to make a primary coil, i find it very hard to manipulate the 
copper tubing into the perfect flat primaries that some other coilers have 
without denting it or without having some akward spiral as the result.   how

do you guys do that??!