PSN-L Email List Message

Subject: Re: Seismograph for school
From: "Geoffrey" gmvoeth@...........
Date: Sat, 30 Sep 2006 19:27:59 -0700

Hello Chris;

Can you tell us how to get a uniform magnetic field
to cut the coil at right angles (normal) to the windings ?

can you use two opposing horse shoe magnets
with a coil in the middle ?

i should imagine a sturdy custom built non magnetic bracket
is needed as well as great care not to let the magnets
clap together or the impact might weaken the magnets.

i think those horshoe magnets with a hole
in the middle of the u is the way to go.


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