PSN-L Email List Message
Subject: Re: Has this been tried?
From: Thomas Dick dickthomas01@.............
Date: Mon, 01 Jun 2009 12:56:09 -0500
> Hi Folks, I should start by saying "it has" I just did......I took
> some ring magnets and slipped them over a length of brass and chrome
> tv antenna. North to North, so the top magnet floats above the bottom
> one. I then slipped a coil over the top magnet, so its position is
> South pole just entering the coil.
> The result is somewhat as if the top magnet is hanging from a
> spring. There it bobs up and down when the coil and pvc housing are
> moved or touched. I tried to measure the frequency and a good guess
> is 3 to 4 Hz.
I tried that many years ago. I used light emitting diodes. I never got
it to work. After Chris got me up with Lehmans and magnetic dampening, I
realized the earth's magnetic field would be an issue and any stray
fields created by motors, lightning, sunspots etc would require
shielding. I also had issues of torque between magnets. Let me know how
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