Re: Practical limits and soldering tubes?

Here's what I do for soldering copper tubing for a primary.

I wind the first part of the primary (inward working out for a flat spiral).
Then wind a turn or so of the next winding butting the two ends. Once I have
everything in relative position, I cut about 1.5 inch of solid copper wire or
tubing which fits inside the primary tubing snug and give it a slight bend to
give it the same curvature as the primary wire being soldered. I stick the
wire in the middle of the two windings and solder. When soldering I use flux
paste, solder, and a torch. It is very easy to keep the workmanship neat (no
solder balls, drips, etc..). Then I wrap a couple windings of electrical tape
(3/4" wide) around the joint to suppress any breakout which might occur from
an imperfection on the surface.


Tesla List wrote:

> Original Poster: Travis Tabbal <bigboss-at-inquo-dot-net>
> First off, how does one solder copper tube? I need more the 50' and I only
> have 50' rolls available here. I can get another roll, but what is the
> best way to connect them? Please include a quick tutorial on the soldering
> process too, I've heard "sweat soldering" mentioned on here before, but
> have no idea what it means. ;)
> I have been playing with numbers in WinTesla. With info from the group and
> from there it seems I can add very big toploads if I increase my primary
> size to compensate leaving the caps and the power source alone. Of course,
> with the math I could get some very large numbers. Can anyone help me
> determine the practical limit to this? Quick coil specs are in order.
> 15KV 60 mA Neon
> .01 mfd cap
> 6" dia. 24" secondary
> 8" flex duct topload
> Series static gap
> Of course, at some point the power source will not be able to deliver the
> required power. However, for the system described, what is a good place to
> start? How about getting another transformer in the mix and running at 120
> mA?
> Travis