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Don Smith

the 8 inch coil produces 137v p to p in center and 98 to 110v p to p at the ends. this will work great with the vibrator system where many pickup coils are placed along the main vibrating coil. The BEMF ringing event is running at around 200khz. After several passes of the compass along the coil I did find a N pole about 3 inches from the south pole end when you look at the coil you'll find a small seperation in the turns apparantly this is causing a new set of poles to be created very strange. also the compass shows a major difference in each pole end the N end has a very gradual dip in the compass and the south end is much quicker