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Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!sjsca4!molehill!poffen
From: poffen@molehill (Russ Poffenberger)
Newsgroups: comp.periphs,comp.sys.ibm.pc
Subject: Re: Strange monitor problem (glow forming on monitor)
Message-ID: <1989Dec4.160308.16001@sj.ate.slb.com>
Date: 4 Dec 89 16:03:08 GMT
References: <7592@cognos.UUCP> <1337@cbnewsi.ATT.COM>
Reply-To: poffen@sj.ate.slb.com (Russ Poffenberger)
Organization: Schlumberger ATE, San Jose, CA
Lines: 31

In article <1337@cbnewsi.ATT.COM> lpb@cbnewsi.ATT.COM (louis.p.barbuscio,ho,) writes:
>It does sound like degausing would help.  Basically Cathode Ray Tubes
>consist of an electron beam aimed at a phosphor screen and focused and
>deflected by electro magnetic coils wrapped around the neck of the
>tube.  All these magnetic fields sometimes have the effect of magnetizing
>things in the vicinity of the screen which results in the kind of haloing
>or shadowing you are experiencing. The way to get rid of this is simnply
>to take a large coil of wire and connect some AC power to it and move it
>around the screen like a divining rod (The coil is referred to as a degausing
>coil and you can probably get a commercially made one from Radio Shack).
>You might get the same affect by taking one of those plug/transformer
>power adapters, like the ones used for battery adapters, plug it into
>an extension cord and wave it around the screen.  The trick is to slowly
>increase the distance between the screen and the coil.   Sudden movements
>have the effect of leaving the spot magnetized.
>

Keep in mind the original posting. He stated quite clearly that the monitor
was an amber monitor. This obviously implies monochrome. Monochrome monitors
don't have degaussing circuits, nor have I ever known one to need it. Certainly
no harm should come to the monitor if done correctly, but I doubt seriously
that it will help. There is probably something wrong with it. Either that or
maybe he has something in close proximity to the monitor that generates a
magnetic field.


Russ Poffenberger               DOMAIN: poffen@sj.ate.slb.com
Schlumberger Technologies       UUCP:   {uunet,decwrl,amdahl}!sjsca4!poffen
1601 Technology Drive		CIS:	72401,276
San Jose, Ca. 95110
(408)437-5254


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