Soldering the wires to the dimes is a little tricky if you haven’t done much soldering, see Figure 3. Place the tip of your soldering iron on the coin, and keep it there till the coin becomes hot enough to melt solder on it. This takes about 1-2 minutes of continuous heating. At this point melt a small puddle of solder on the coin, and place the bare end of one of the insulated wires into the puddle. Remove the soldering iron from the coin. Keep the wire in place until the solder solidifies. Repeat the procedure for the other coin, but solder the shielding along with the wire to this coin. This will be the ground electrode