Need Help with 15 degree Primary Support System
I'm soliciting any tips, suggestions or hints on building a support
system for a 15 degree, 16 turn primary using 1/4" copper tubing
for my 15kv 60ma 6" secondary system. Spacing is 1/4" between
turns OD, and 1/2" center-to-center. I derived the 16 turn from
data input into Wintesla program.
I had initially tried putting in 8 wooden supports at slightly more
than 8 inches in length to give me the 16 turns out of 1x4 for
the wood. I used 1/4" coax cable naildowns spacely evenly
along the top of the wood but the entire affair ended up as a
disaster and I had to remove everything before I actually put the
whole length of tubing in. The coax supports weren't deep enough
to hold the pipe in place when I tried a small length of pipe in
them, as the tubing kept popping up and out. I used silicone
glue to fasten the cable holdowns to the top of the wood but this
proved to be a mistake. I then tried putting small brad nails through
the hole provided in the coax naildowns but they split the wood and
it also gave me a concern for providing a path to promote arcing
from turn to turn of the tubing.
I ended up in frustration removing all the supports to start over.
I know there HAS to be a better method. I would appreciate
any help from some of you old vet coilers on this.
I also did try cutting notches into the wood 1/4" to make the
u-shaped channels for the tubing but I couldn't get an even
depth and it kept splitting the wood. Apparently using a 1x4
isn't necessarily a good choice of wood.
Also, I need to know is it better to start the winding of the
tubing from inside to outside?
"Resistance to tyrants is obedience to God" - Thomas Jefferson