Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!uakari.primate.wisc.edu!caen!sol.ctr.columbia.edu!emory!athena.cs.uga.edu!mcovingt
From: mcovingt@athena.cs.uga.edu (Michael A. Covington)
Newsgroups: sci.electronics
Subject: Re: Liquid Crystal Terminals, TVs and Oscilloscopes
Message-ID: <1991Feb13.203003.18739@athena.cs.uga.edu>
Date: 13 Feb 91 20:30:03 GMT
References: <1991Feb13.181820.25718@ms.uky.edu>
Organization: University of Georgia, Athens
Lines: 17

(1) Keep the old Eico oscilloscope. It has neither a deflection yoke nor
a flyback transformer and therefore doesn't have the main sources of ELF
emissions.  I'd be surprised if it put out any detectable emissions at all.

(2) I'm wary of LCD screens because of the loss of readability.
I *know* that eyestrain is bad for me. I *don't* know if the oscillating
magnetic field from a conventional terminal will do me any harm.

(3) How close do you sit to your TV when you watch it?

(4) Why are you only concerned about oscilloscopes and TVs and computer
terminals?  What about the 60 Hz magnetic field from all the wiring in your
house?

In sum: Exactly what kind of emission are you trying to get away from,
and why do you think they are harmful, and what is the total amount of
energy involved, and what do you consider to be an acceptably low level?