[ARC5] Brass Tubing

[Kenneth G. Gordon]

On 26 Aug 2014 at 17:38, Geoff wrote:

> What about copper water tubing for refrigerator ice and cold water? While 
> copper isnt as strong it is thicker and can be annealed for hardness.

The walls of 1/4" copper tubing are too thick: it won't fit over the spline, 
unless you mill it out to very thin, then its too weak.

Brass tubing has very thin walls and after slotting the ends of a piece of 1/4" 
brass tubing, it can be easily driven over the tuning spline and will grip very 
tightly. As you drive it onto the spline, it expands just enough.

The tuning spline is almost exactly 1/4" in OD.

I've tried just about every other type of tubing.

Brass is the only one that worked well for me.

Ken W7EKB