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|HORN AND DIAPHRAGM. First, remove the
bottom of the juice can with a can opener. Then
stretch a piece of aluminum foil tightly over
either opening, folding the foil edges down the
sides of the can and securing the foil with a
strong rubber band. Try to get this diaphragm as
taut as you can.
STYLUS. To make the stylus, carefully tap the needle through the cork until the eye end is flat with the cork surface. Glue the back of the cork to the center of the diaphragm. You have just built a mechanical sound pick-up.
|WHATíS THIS I HEAR? With the can opening next to your ear, lightly scrape your finger against the stylus. Pretty loud, isnít it? Now, holding the pickup at an angle, let the needle rest lightly in the grooves of your record. Well Iíll be a cave- manís cousin. Thatís music coming out of the can.|