On Sun, 29 Sep 2002 15:52:18 -0600 "Jan D. Marshall"writes: With your coil system as shown, you will likely pick up both vertical and horizontal movements of the arm. I agree with that, in fact it would probably be more sensitive to vertical than horizontal. I would mount the magnet on the side of the arm and have it move toward and away from the coil. You'll have to balance it, of course, but you could always put your damping magnet on the opposite side and have it move around a nice chunk of CU. On Sun, 29 Sep 2002 15:52:18 -0600 "Jan D. Marshall" <jandmarshall@............>= =20 writes:With your coil system as shown, = you will=20 likely pick up both vertical and horizontal movements of the=20 arm.I agree with that, in = fact it would=20 probably be more sensitive to vertical than horizontal.I would mount the magnet= on the=20 side of the arm and have it move toward and awayfrom the coil. You'll = have to=20 balance it, of course, but you could always put yourdamping magnet on the = opposite side=20 and have it move around a nice chunk of CU.Tom