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| The electrical smoke trap in this experiment is a model electrostatic precipitator. Mainly because of the cost of the coil,
you may want to build the model as a joint venture with a
few of your friends. In that way, everyone can pitch in to
pay the bill. Better yet, why not suggest it as a class projectat school.
Start by nailing the wood support to the base. That’s that for the stand. Next, wrap the aluminum foil around the card board tube about an inch from the end of the tube. Tape the foil in place.
Remove 6 inches of insulation from a 3-foot piece of wire. Wrap the bared portion around the foil halfway up its length, and twist is tightly. Now you can mount the tube on the stand, using tape, rubber bands, or string. Leave about 3 inches of clearance between the bottom of the tube and the base.
Take the other end of the wire from the foil and connect it (with the tip bared, of course) to the “COM” terminal of the coil, as shown in the drawing. If you’re using a Ford coil, try to solder the wire on. Otherwise, you’ll have to rely on tape to hold thire down.
From a second 3-foot piece of wire, remove 7 inches of insulation. This bared portion will have to be supported in the center of the tube. Use toothpicks as support bars. Push one toothpick through the tube just above the foil and the other just below it.
To install the wire, form a hook on the end so that you can fish it onto the lower toothpick. After hooking the toothpick, pull the wire snugly, and loop it around the upper toothpick. Keep the wire centered within the tube as best you can. Then connect the free end to the “PLUG” terminal on the coil.
With the remaining wire, complete the connections as shown.