CRT Shielding

[Guest]

I've got a serious magnetic interference problem from some close by high tension lines. What is a decent CRT with excelent shielding. Otherwise I quess it's off to LCD land
Thanks for any suggestions in advance.

 

[GoSharks]

Your best bet is an LCD. It is impossible to completely shield a CRT monitor, since you cannot put a shield over the front glass. Shielding the rear only solves half the problem.

Also shielding is very expensive, odds are the shield would cost more than the monitor.

Suggest you also consider your hard drive.

Jim Witkowski
Chief Hardware engineer
<A HREF="http://www.monitorsdirect.com" target="_new">MonitorsDirect.com</A>

 

[Guest]

Hard drive? I hadn't considered that as a source of interference but it does make sense. the monitor issue is a known problem in this building. the screen is in a constant wave motion. Raising the refresh rate just changes it from a wave to a painfull jitter. The previous tenant just dealt with it but it is starting to take a toll on my eyes. My primary usage is accounting software, spreadsheets and internet junkie so I don't see a major disadvantage to the LCD except the cost. Thanks for the help.
Ted

 

[GoSharks]

No that’s not what I mean. Hard drive is not the source of interference, I would worry about losing data etc. remember hard drives use a magnetic media and if you have high tension lines close enough to affect your monitors, they may be strong enough to affect your HD.

Jim

<A HREF="http://www.monitorsdirect.com" target="_new">MonitorsDirect.com</A>

 

[Guest]

O.K. I didn't think that through. I was thinking the electric motor that runs the drive could cause a problem. I've been here for about ten months and never lost anything that I know of. no corrupt files or anything like that. Just a crappy monitor made worse by high tension lines about 250 feet off my shoulder. Do you have an opinion on polarized glare shields? I know this won't help the current problem, but it may help with clarity. Are they worth while with a LCD display? Thanks again

 

[reptilej]

ok we've covered monitor and hard drives but what about you? being in such close proximity to something that causes sucha distortion in a monitor may also have negative effects on you.

repeat after me, we are all individuals!

 

[Guest]

That is certainly a concern. I have discussed it at length with a couple of elctrical engineers that I know. The "accepted" opinion is that it isn't a concern. I have my doubts but at the moment it is a necessary evil. Luckily I'm not in the office everyday.

 

[GoSharks]

I do not recommend glare filters, I find it is better and cheaper to remove the source of the glare, close a window shade etc.

I do not know of any study that concludes magnetic fields harm you in any way? Please forward any information you may have on this subject.

What about the wiring in your walls, they give off the same fields. So do toasters, hair dryers, air conditioners, heaters etc.etc.etc. Even the earth has a magnetic field, rotate your monitor 90 degrees and you will see the affects of the earths magnetic field.

Jim Witkowski
Chief Hardware Engineer

<A HREF="http://www.monitorsdirect.com" target="_new">MonitorsDirect.com</A>

 

[sjonnie]

<A HREF="http://www.mcw.edu/gcrc/cop/powerlines-cancer-FAQ/toc.html" target="_new">Here</A> is an excellent site with many answers to questions about electromagnetic radiation and health.
It is probably worth remembering that you will be exposed to more radiation from your monitor screen than from those power lines!!

 

[GoSharks]

Good Link, here is another one <A HREF="http://www.pc.ibm.com/ww/healthycomputing/vdt14.html" target="_new"> you should read</A>


Jim Witkowski
Chief Hardware Engineer
Cornerstone / Monitorsdirect.com

<A HREF="http://www.monitorsdirect.com" target="_new">MonitorsDirect.com</A>

 

[sjonnie]

Nice, I read this in there

"Based on available scientific evidence, the American Academy of Ophthalmology considers video display terminals (VDTs) to be safe for normal use and to present no hazard to the eye."

I would disagree with this though. I'm sure spending 3 months solid infront of the computer writing my PhD thesis added -0.5 to my prescription

 

[GoSharks]

Maybe you need a good monitor?

Jim

<A HREF="http://www.monitorsdirect.com" target="_new">MonitorsDirect.com</A>