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[RFI] Computer monitor RFI

To: <rfi@contesting.com>
Subject: [RFI] Computer monitor RFI
From: Ernie" <ernie@avana.net (Ernie)
Date: Sun, 26 Dec 1999 12:45:15 -0500
Guys, FWIW

I am using an NEC MultiSync 70 monitor (17".)  I find it to be very quiet.
I had the same results with the C500 15" NEC monitor as well....my wife is
now using that one in her office.

If any of you ever have the chance to take the cover off of an NEC monitor
you will see a great deal of shielding.  Compared to other 'bargain'
monitors out there, there is a very real difference in shielding.  Once
again, it is an instance of getting what you pay for......

Ernie KS4Q

----- Original Message -----
From: "Ed - K0iL" <k0il@mitec.net>
To: "RFI Reflector (E-mail)" <rfi@contesting.com>; <Swilsonac6@aol.com>
Sent: December 26, 1999 11:34 AM
Subject: RE: [RFI] Computer monitor RFI


>
> On Sunday, 26 December, 1999 1:19 AM, Swilsonac6@aol.com
> [SMTP:Swilsonac6@aol.com] wrote:
> > I just got a 19 inch Veiwsonic monitor to replace my 15 inch NEC
> multisync
> > 4FGe that I have been using for the last few years. I get S5 - S8 noise
> every
> > 75 - 77 KHz.  Thinking it might be this particular monitor I
> > switched it for a new NEC V90 19 inch monitor with no real change. The
> > interference seems to be coming from the monitor itself.
> >
> > Have gone back to my 15 inch NEC but miss all that space for extra info
> > Has anyone had a similar problem and have a solution ??
>
> The only solution I've ever heard of is to buy a clean monitor to start
> with.  The Viewsonics are RFI/EMI Junk!  Return it or sell it.  Before
> doing so however, try plugging it into another electrical circuit (run an
> extension cord if you have to) or at least a different outlet from the
> radio while having it sit close to or at the shack operating position.
The
> noise may be getting into the radio via the AC circuit.  Let us know if it
> changed anything.  If not, get rid of it.
>
> The NEC Multisyncs have been found to be fairly clean monitors by myself
> and other list members; problem is that they're not making some models any
> longer like the C500 series which is very clean!  I also found the AST
> Vision 5v to be just as clean as the NEC C500 that I have.
>
> A year ago, I took a portable shortwave rcvr alomg to the computer store
> and tested most the monitors in the store.  I went during the day so I
> could turn off other nearby monitors while testing a particular monitor.
I
> explained to the sales guys what I was doing and why, and they said OK.
>  Tested the compaqs, found them fairly noisey.  The Viewsonics were junk
(I
> repeat myself though).  Almost all NECs were fairly clean, but I only
> tested 15" since that's all the room I have on the operating table.
>
> > Considering trying a flat screen LCD monitor but they are kinda
expensive
>
> I'm really curious to know if these LCDs are the solution.  If you do buy
> one, let us all know how it works out for you!
>
> 73,
> de ed -K0iL
> -.-.  --.-   ....  .-  --  ...   -..  .   -.-  -----  ..  .-..   -.-
>            Ed Edwards    --    K0iL
>  PO Box 375                        k0il@arrl.net
>  Elkhorn, NE 68022-0375       k0il@qsl.net
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>  Visit my home page:  http://www.qsl.net/k0il
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>
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>


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