[ARC5] Brass Tubing

[Dennis Monticelli]

I like the brass tubing scheme.  Simple and should give a sufficient grip.

I have used another method with success that I will share.  Find a plastic
dowel of a diameter that is slightly less than the inner dia of the recess
for the spline.  Cut off a small piece and bore a hole down the center with
a dia just ever so slightly smaller than the spline dia.  1/4" may end up
to be just right.  If you end up too sloppy simply wrap a little teflon
plumbers tape around the spine to take up space.  Epoxy the section to your
favorite knob and then just push it on.  Once I got the hang of it I massed
produced the little adapters for all my radios.

Dennis AE6C


On Tue, Aug 26, 2014 at 2:54 PM, Kenneth G. Gordon <kgordon2006 at frontier.com
> wrote:

> 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
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>