Hi
I have started making the elements.
I have previously made the 90 degree bar bender. I now needed a tool to form a large radius curve (535mm radius) on the short leg of the L. There are lots of DIY slip roll machines on the internet. The tool I made isn't like any of them.
I used a row of nails in a scrap piece of plywood to bend the element around.
There is a lot of spring-back so I did a test bend with a arbitrary radius, compared the rod with the desired radius, then calculated the radius tool I needed to finish at 535mm. It turns out I need to bend the rod around a 305mm radius curve to end up with the desired radius.
The large formed radius will create spherical ends to the antenna. Will this radically improve performance ?? Probably nil observable effect, but it will look cool.
![Cool 8)](https://www.eevblog.com/forum/Smileys/default/cool.gif)
Easier to bend the rod than to drill angled holes in the top fittings.