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From: jeffw@midas.WR.TEK.COM (Jeff Winslow)
Newsgroups: sci.electronics
Subject: Re: DC motor noise in audio circuit
Message-ID: <3394@wrgate.WR.TEK.COM>
Date: 28 Aug 90 22:33:46 GMT
References: <15857@s.ms.uky.edu> <6706@milton.u.washington.edu>
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Reply-To: jeffw@midas.WR.TEK.COM (Jeff Winslow)
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Organization: Tektronix, Inc., Beaverton,  OR.
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>The energy in the magnetic field is MAXIMALLY coupled into a low 
>impedance path (like a thin ground plane).

Remember, magnetic fields don't really induce voltages in isolated bits
of paths. High impedance, low impedance, it doesn't matter. Magnetic fields
induce voltages in *loops*.

How big are those loops? How are they oriented with respect to each other?
If you've got magnetic interference problems, ask those questions.

							Jeff Winslow