I was in an MRI clinic and noticed that the monitors were set up tall
and narrow. They weren't just turned on their sides, they were made
this way. This was to better view spinal column images. I thought this
would be great for me, a musician, as I could better view sheet music.
I tried turning my 19" crt 90 deg, but it messed up the color and the
focus. Are there certain crt designs that would function on their
sides? I imagine LCDs would work this way, but I don't want to spend
the money. Why did I have this problem? How it it that an electron
beam would be affected by gravity?
Robobass

On 28 Jan 2004 02:59:49 -0800, (robobass)
wrote:

I was in an MRI clinic and noticed that the monitors were set up tall
and narrow. They weren't just turned on their sides, they were made
this way. This was to better view spinal column images. I thought this
would be great for me, a musician, as I could better view sheet music.
I tried turning my 19" crt 90 deg, but it messed up the color and the
focus. Are there certain crt designs that would function on their
sides? I imagine LCDs would work this way, but I don't want to spend
the money. Why did I have this problem? How it it that an electron
beam would be affected by gravity?
Robobass


When you turn a CRT on it's side the convergence is disturbed by the
change in direction of the earth's magnetic field. You could do it
with an LCD or plasma display but not a magnetic deflection device
such as a CRT.

John

I think it should be OK if it's turned on while on it's side, so the deguass
circuit does it's thing. I have seen large (25" and up) CRT's react poorly
to being moved while ON.

Mark Z.

--
Please reply only to Group. I regret this is necessary. Viruses and spam
have rendered my regular e-mail address useless.


"robobass" wrote in message
om...
I was in an MRI clinic and noticed that the monitors were set up tall
and narrow. They weren't just turned on their sides, they were made
this way. This was to better view spinal column images. I thought this
would be great for me, a musician, as I could better view sheet music.
I tried turning my 19" crt 90 deg, but it messed up the color and the
focus. Are there certain crt designs that would function on their
sides? I imagine LCDs would work this way, but I don't want to spend
the money. Why did I have this problem? How it it that an electron
beam would be affected by gravity?
Robobass

In article , John Bachman
writes
On 28 Jan 2004 02:59:49 -0800, (robobass)
wrote:

I was in an MRI clinic and noticed that the monitors were set up tall
and narrow. They weren't just turned on their sides, they were made
this way. This was to better view spinal column images. I thought this
would be great for me, a musician, as I could better view sheet music.
I tried turning my 19" crt 90 deg, but it messed up the color and the
focus. Are there certain crt designs that would function on their
sides? I imagine LCDs would work this way, but I don't want to spend
the money. Why did I have this problem? How it it that an electron
beam would be affected by gravity?
Robobass


When you turn a CRT on it's side the convergence is disturbed by the
change in direction of the earth's magnetic field. You could do it
with an LCD or plasma display but not a magnetic deflection device
such as a CRT.

If you degauss the CRT once it is on its side, normal operation should
be restored.

Getting the software to display correctly could be more of a problem.
--
Tim Mitchell

On Wed, 28 Jan 2004 12:07:56 +0000, Tim Mitchell
wrote:

In article , John Bachman
writes
On 28 Jan 2004 02:59:49 -0800, (robobass)
wrote:

I was in an MRI clinic and noticed that the monitors were set up tall
and narrow. They weren't just turned on their sides, they were made
this way. This was to better view spinal column images. I thought this
would be great for me, a musician, as I could better view sheet music.
I tried turning my 19" crt 90 deg, but it messed up the color and the
focus. Are there certain crt designs that would function on their
sides? I imagine LCDs would work this way, but I don't want to spend
the money. Why did I have this problem? How it it that an electron
beam would be affected by gravity?
Robobass


When you turn a CRT on it's side the convergence is disturbed by the
change in direction of the earth's magnetic field. You could do it
with an LCD or plasma display but not a magnetic deflection device
such as a CRT.

If you degauss the CRT once it is on its side, normal operation should
be restored.

I don't think that degaussing will do the trick. Degaussing removes
residual magnetism within and around the CRT itself but has no effect
on the earth's magnetic field.

Guess I will do a little test later today just to make sure.

John

Back in the mid 1980s Apple and at least one other mfg made monitors that
could be rotated for working on legal sized documents. I see no reason why
can't use yours rotated 90 degrees. Look for a deguass butoon or try
turning it on and off several times.
73
hank wd5jfr
"robobass" wrote in message
om...
I was in an MRI clinic and noticed that the monitors were set up tall
and narrow. They weren't just turned on their sides, they were made
this way. This was to better view spinal column images. I thought this
would be great for me, a musician, as I could better view sheet music.
I tried turning my 19" crt 90 deg, but it messed up the color and the
focus. Are there certain crt designs that would function on their
sides? I imagine LCDs would work this way, but I don't want to spend
the money. Why did I have this problem? How it it that an electron
beam would be affected by gravity?
Robobass

Normally a CRT cannot be directly put in its side and work directly. If you
can find someone who is knowledgeable to redo the convergence and purity
set-up for this type of operation it will work for you. The mask in the CRT
would have to be degaussed on its side before doing the re-alignment of the
purity and convergence set-up.

A number of years ago, Apple came out with a CRT monitor that can be
rotated. The CRT had a very good u-metal shielding, and they used some
sophisticated alignment circuits in their design to compensate the purity
and convergence for this. I had a look at one of these a number of years
ago. I found that when it was on its side, it was not very perfect, but it
was better than the average when run this way. This was not done simply.

Even if you had your monitor aligned to work on its side, you will have to
have the software for this, or your computer will be on the difficult side
to use.

There are some LCD monitors that are designed to be able to be rotated on
its side. A descent monitor with this feature that is very good is the
Samsung SyncMaster 171N. This one can be rotated to work at any angle from
180 deg (normal) to 90 deg (side). This monitor comes with the software to
accommodate this.



--

Greetings,

Jerry Greenberg GLG Technologies GLG
=========================================
WebPage http://www.zoom-one.com
Electronics http://www.zoom-one.com/electron.htm
=========================================


"robobass" wrote in message
om...
I was in an MRI clinic and noticed that the monitors were set up tall
and narrow. They weren't just turned on their sides, they were made
this way. This was to better view spinal column images. I thought this
would be great for me, a musician, as I could better view sheet music.
I tried turning my 19" crt 90 deg, but it messed up the color and the
focus. Are there certain crt designs that would function on their
sides? I imagine LCDs would work this way, but I don't want to spend
the money. Why did I have this problem? How it it that an electron
beam would be affected by gravity?
Robobass

On Wed, 28 Jan 2004 08:29:51 -0600, "Henry Kolesnik"
wrote:

Back in the mid 1980s Apple and at least one other mfg made monitors that
could be rotated for working on legal sized documents. I see no reason why
can't use yours rotated 90 degrees. Look for a deguass butoon or try
turning it on and off several times.

Those were monochrome monitors - the change in magnetic field would
cause a positional shift but convergence was not a problem.

In that time period I was designing monitors for a large computer
company. We shipped a new color monitor design to our folks in
Australia and were puzzled when they reported that the convergence was
off.

I could hardly believe it when we found that the convegence problem
was caused by the difference in the Earth's magnetic field between
Australia and the US.

A happy discovery was that if you break the field into vertical and
horizontal components the horizontal is nearly identical but the
vertical is nearly identical in magnitude but opposite in direction.
So our solution was to turn the monitors upside down when aligning
them here - then they were fine right side up in Australia.

Those were low-resolution monitors. I doubt that the upside down
trick would be adequate for today's monitors. Monitor manufacturers
today use a controlled magnetic field room in which they can create
the magnetic field for any place on earth. They set it up, align the
monitors and ship the units to the right place.

John

This thing with the monitors going to Australia was very amusing! This was
a very smart idea to align them upside-down!

--

Greetings,

Jerry Greenberg GLG Technologies GLG
=========================================
WebPage http://www.zoom-one.com
Electronics http://www.zoom-one.com/electron.htm
=========================================


"John Bachman" wrote in message
...
On Wed, 28 Jan 2004 08:29:51 -0600, "Henry Kolesnik"
wrote:

Back in the mid 1980s Apple and at least one other mfg made monitors that
could be rotated for working on legal sized documents. I see no reason why
can't use yours rotated 90 degrees. Look for a deguass butoon or try
turning it on and off several times.

Those were monochrome monitors - the change in magnetic field would
cause a positional shift but convergence was not a problem.

In that time period I was designing monitors for a large computer
company. We shipped a new color monitor design to our folks in
Australia and were puzzled when they reported that the convergence was
off.

I could hardly believe it when we found that the convegence problem
was caused by the difference in the Earth's magnetic field between
Australia and the US.

A happy discovery was that if you break the field into vertical and
horizontal components the horizontal is nearly identical but the
vertical is nearly identical in magnitude but opposite in direction.
So our solution was to turn the monitors upside down when aligning
them here - then they were fine right side up in Australia.

Those were low-resolution monitors. I doubt that the upside down
trick would be adequate for today's monitors. Monitor manufacturers
today use a controlled magnetic field room in which they can create
the magnetic field for any place on earth. They set it up, align the
monitors and ship the units to the right place.

John

"John Bachman" wrote in message
...
On Wed, 28 Jan 2004 12:07:56 +0000, Tim Mitchell
wrote:

In article , John Bachman
writes
On 28 Jan 2004 02:59:49 -0800, (robobass)
wrote:

I was in an MRI clinic and noticed that the monitors were set up tall
and narrow. They weren't just turned on their sides, they were made
this way. This was to better view spinal column images. I thought this
would be great for me, a musician, as I could better view sheet music.
I tried turning my 19" crt 90 deg, but it messed up the color and the
focus. Are there certain crt designs that would function on their
sides? I imagine LCDs would work this way, but I don't want to spend
the money. Why did I have this problem? How it it that an electron
beam would be affected by gravity?
Robobass


When you turn a CRT on it's side the convergence is disturbed by the
change in direction of the earth's magnetic field. You could do it
with an LCD or plasma display but not a magnetic deflection device
such as a CRT.

If you degauss the CRT once it is on its side, normal operation should
be restored.

I don't think that degaussing will do the trick. Degaussing removes
residual magnetism within and around the CRT itself but has no effect
on the earth's magnetic field.

Guess I will do a little test later today just to make sure.

John



Try it, it works fine, when I had a smaller monitor I used to turn it on
it's side regularly to play vertical monitor games with MAME. Anyone
remember those old Radius Pivot monitors? They were designed so you could
rotate them 90 degrees and the software would detect that and flip the
image. Also arcade monitors for horizontal and vertical orientation are the
same monitor, just mounted differently. As long as you degauss it in it's
new orientation it'll work perfectly.

Even if you had your monitor aligned to work on its side, you will have to
have the software for this, or your computer will be on the difficult side
to use.



IIRC the ATI Radeon drivers let you do this.


As an experiment I just tried running my Sony 22" CRT on it's side, after
degaussing the image looked fine (but sideways)

Others mentioned the electromagnetic issues relating to turning the
CRT on its side. There is one other issue and that is convective
thermal cooling of the remaining circuitry in the monitor. That is,
the ol' "heat rises" principle and that's how the heat exits the monitor,
through the top. It's likely that some circuits could run hotter because
there may not be cooling vents on the side of the monitor enclosure.

A cheap fan of any type would probably remedy the problem though.

b.

"James Sweet" wrote in message news:CSRRb.133168$5V2.675975@attbi_s53...

Even if you had your monitor aligned to work on its side, you will have to
have the software for this, or your computer will be on the difficult side
to use.



IIRC the ATI Radeon drivers let you do this.


As an experiment I just tried running my Sony 22" CRT on it's side, after
degaussing the image looked fine (but sideways)


Monitors/tv sets are normally set up for the "average" magnetic field
in the northern hemisphere unless they are known to be going to a
location in the southern hemisphere. When a tv/monitor is operated on
its side, the earth's magnetic field has the greatest effect on the
purity, and somewhat lesser effect on the convergence. Degaussing
will help the purity, but may not be 100% effective. If the purity
must be manually readjusted, then the convergence usually must also be
readjusted. LCDs are the way to go if you want to be able to switch
back and forth without any extra problems.

H. R. (Bob) Hofmann