You will need to know how the parts are used and what you must do to make the foxhole radio. This is the way the set looks when it is all finished.
First, we start with the coil.
Unwind a long piece of wire from the spool and stretch it out straight across the floor.
Pick up the piece of cardboard tubing, and with one of the nails make two little holes at one end of the tube and two little holes at the other end. We’ll number the holes i, 2, 3 and 4. Now the tubing looks like this:
Push about six inches of the wire through Hole No. 2. Now pull the wire up through Hole No. 1. You can see that the two holes give us a way to hold the wire in place at one end of the tubing.
Hold the tubing in your left hand. With your right pick up the wire and carefully wind it around and around the tube. Do this until you have a total of 120 turns of wire around the tubing. Make sure the turns lie side by side on the tubing, not one on top of the other.
After you have put 120 turns of wire around the tubing, measure off six inches of wire. Then cut the wire with your pliers. Push the end of the wire down through Hole No. 3 and then pull it up through Hole No. 4. Now you have made a nice sturdy coil that will stay in place.