Re: [PCWorks] Stray EM fields, CRT's & effects Re: Burning CDs
- From: David Grossman <dgrossman@xxxxxxxxxx>
- To: pcworks@xxxxxxxxxxxxx
- Date: Sun, 09 Nov 2008 03:36:35 +0200
I don't know what that material is, Peter, but I have no doubt that the
industry will develop an artificial or synthetic replacement well before
2017.
We may not even need monitors. I saw a keyboard replacement at an
exhibition. A picture of the keyboard is projected onto your working area or
table, and you can type on it directly. Similarly, the previews that I saw
of Windows 7 show an onscreen touch keyboard that can replace the regular
keyboard (although it must be very difficult to get any speed typing
vertically!)
Similarly, the industry can find a replacement for screens - either by
projecting them onto the wall or a table or a working area. I don't think we
should worry about the planet running out of materials to build LCDs.
David Grossman
> So crt's are being made less and less as lcd and plasma monitors gain
> popularity so lesser need for shielding. As an aside, lcd's must evolve
> as well as one important material in their construction will be
> exhausted by 2017.
>
> A fellow student from a while back worked on concert stage construction
> and shielded each and every speaker magnet with a sheet steel box. Must
> have been a lot of boxes.
>
> Peter Kaulback
>
> Clint Hamilton-PCWorks Admin wrote:
> >> By the way, I don't know whether Energy Star
> >> has to do with radiation. It has to do with
> >> electricity consumption.
> >
> > Yes, I'm not sure it does: "In the USA, all monitors now are
> > 'Energy Star' compliant which also ***might*** reduce
> > radiation". I guess if you make them more efficient that
> > **might possibly** reduce some of the radiation.
> >
> > Again, I'm mostly talking about **magnetic** fields. A CRT
> > doesn't really have enough to damage a flash drive or SS HD,
> > unless perhaps it's resting on top for a period of time.
> > Shielding of harmful magnetic fields would have to be
> > retroactive which is not possible (you can't go and shield
> > every speaker or device with a large magnet in it that's
> > already been purchased), so the SSD's would have to be
> > manufactured with some kind of far different "shielding" than a
> > monitor due to the much stronger gauss of said devices. I
> > guess that would have to be some kind of "cancellation magnet"
> > around them sort of like shielded speakers have......but, I've
> > never tried that to see how that would work. The cancellation
> > device might have to be only around the magnet itself that's
> > causing the field.
> >
> > I've built speakers before for monitor or TV use with drivers
> > that were not shielded, and I was able to shield them using
> > some kind of metal. I'm not sure what it was, it was NOT
> > magnetic, at least it was not drawn to magnets. It looked like
> > it had zinc in it.
> > -Clint
> >
> > God Bless
> > Clint Hamilton, Owner
> > http://www.OrpheusComputing.com
> > http://www.ComputersCustomBuilt.com
> >
> > ----- Original Message -----
> > From: "David Grossman"
> >
> >
> > Right, Clint.
> > That's exactly what the computer industry did with monitors.
> > They shielded
> > them well enough to meet the standards.
> > The problem with solid state drives is different, but if they
> > can solve the
> > radiation problem with monitors, they can do a comparable trick
> > with drives.
> > By the way, I don't know whether Energy Star has to do with
> > radiation. It
> > has to do with electricity consumption. Radiation standards are
> > based on
> > TCO.
> > David Grossman
> >
> >
> >> -----Original Message-----
> >
> >> I agree, but they still ARE a problem. I was mostly talking
> >> about magnets more than stray EM fields from electronic
> >> devices, and the only way to fix that is to make products
> >> shielded from them, or make products that's not sensitive to
> >> them. In the USA, all monitors now are "Energy Star"
> >> compliant
> >> which also might reduce radiation. http://tinyurl.com/6ptk9a
> >> -Clint
> >
> >> ----- Original Message -----
> >> From: "David Grossman"
> >>
> >> Electromagnetic fields do not have to be a problem.
> >>
> >> About 20 or 25 years ago, CRTs emitted a great deal of
> >> radiation, causing
> >> pregnant mommies who were exposed to the radiation for many
> >> hours a day to
> >> spontaneously abort their babies. The fledgling computer
> >> giants
> >> were
> >> terrified that a wonderful industry with a great future would
> >> go belly up
> >> (perhaps I should have used a better expression!) and they
> >> were
> >> determined
> >> to find a solution. They did - and the resulting and
> >> ever-increasing
> >> Scandinavian TCO standards are so stringent today that there
> >> is
> >> nothing to
> >> worry about. Granted, flat screens largely replaced CRTs
> >> today,
> >> but that's
> >> not the point - and even flat screens have to comply with TCO
> >> standards.
> >>
> >> The industry reacted and solved the problem with one kind of
> >> radiation
> >> because they had no choice. They proved that with
> >> determination
> >> it is
> >> possible to practically eliminate the threat of dangerous
> >> radiation.
> >>
> >> When it comes down to it, electromagnetic fields are just
> >> another kind of
> >> radiation. The industry solved the problem with CRTs, and
> >> they
> >> CAN solve the
> >> problem with solid state media.
> >>
> >> It's just an issue of determination and will-power.
> >>
> >> David Grossman
> >>
> >>
> >>
>
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