The ferrite rod that you wrap wires around to make a coil is brittle. If you drop it or knock it against something, it could easily break, so be careful! If you place your radio in a wooden box (as we did), check the thickness of the wall of the box against the length of the threads on the potentiometer. Because the wall on our box was 1⁄4" thick (the same thickness as the threads on the potentiometer), we just put some glue between the body of the potentiometer and the wall of the box (making sure not to get glue on the rotating shaft). You might want to use a chisel to reduce the thickness of the wall so that the rotating shaft sticks out a little farther; that way, the knob doesn’t end up too close to the face of the box.

The variable capacitor has very small holes in its metal body that you can use to mount it on small pins. Again, we found it easiest to glue this to the wall of the box after chamfering (cutting a furrow in) the edge of the hole to fit the metal knuckle around the shaft. In this way, the wall of the capacitor fits flush against the wall of the box.