Primary Coil

The primary coil is made from 1/4 inch, soft copper tubing, with each turn spaced 1/4 inch

apart.  There is a very simple way to mark the 1 inch PVC standoffs thanks to Greg Hunter.

Click here to find out how.


I used 50 feet of tubing, with a center diameter of 7 inches, creating a primary coil with 14 turns.

I wanted to design my coils so that they could easily be broken down and reassembled.  The center

mount for the secondary coil was made from a PVC level-fit closet flange.  I used a grinder to remove

the outside section with the bolt slots.