D9800 Blurry on the sides

[wp34]

I've had a D9800 for a couple of years now but I just this weekend got around to configuring it.  I'm dealing with a couple of issues yet and am wondering if any of you have seen this particular one before.  The image is very clear in the middle but gets blurry at the left and right edges.  Not at the top or bottom but at the left or right edges.  I have not tried hooking it up to another computer yet I'm going to try that tomorrow.  I've degaused the monitor a couple of times.  The speakers I'm using are shielded---plus they are located above the monitor.

If you have any thoughts or suggestions I would appreciate some feedback. 

[lilshawn]

yes.

They are all like that.

its very difficult to hit a tiny little pixel with a stream of particles flying by at 40,000 feet per second

(~25 inches times 320 lines times 60 frames a second divided by 12 inches in a foot = 40,000 feet per second)


I should also mention that beam also has to defy particle physics and bend around a corner coming out of the gun to hit that pixel.

the monitor normally looks really good in the middle cause the beam shoots straight on the corners on the other hand...



the beam has to do an abrupt 40 degree (some 60 or more) turn to hit a tiny 1/32" dot.

your eyes and mind have been sullied by HD-blueray-superflat-ultrablack-1080-ultrasharp-ultrapure-ultrawhatever-600hz displays.

[wp34]

Thanks for the response lilshawn.  That really helps.     

I'll have to dig out my old 21" CRT I have in storage and see if I can notice something similar. 

I don't notice the blurring so much (if at all) with games but it is real noticeable in Windows.  I've had a number of issues getting it the D9800 to display right with GroovyMame and wanted to make sure I wasn't missing something.

[MonMotha]

Part of the reason is due to the fact that the phosphor dot pitch typically is coarser at the edges than in the center of the tube face.  This is done partially to hide the poor edge behavior (owing not only to what LilShawn said but also due to how hard it is to tweak up convergence, etc. along the edges) and is much more pronounced on a typical TV tube (used in arcade monitors) than a computer monitor tube (used, appropriately, in computer monitors).

Getting a CRT monitor to look "perfect" is darned hard.  Even the multi-kilodollar workstation monitors from the late 90s weren't "perfect", but they were pretty good.  The amount of factory tuning and additional circuitry required to make that happen was pretty extreme, though, which is why they cost so much.

[wp34]

Getting a CRT monitor to look "perfect" is darned hard.  Even the multi-kilodollar workstation monitors from the late 90s weren't "perfect", but they were pretty good.  The amount of factory tuning and additional circuitry required to make that happen was pretty extreme, though, which is why they cost so much.

This helps a lot.  I've suspected that you can't get it perfect (particularly Windows) but wasn't sure where to draw the line with my tweaking.  Thanks MonMotha.

[Gray_Area]

This helps a lot.  I've suspected that you can't get it perfect (particularly Windows) but wasn't sure where to draw the line with my tweaking.  Thanks MonMotha.

It won't matter at 15 through 24khz. Or even playing PC games at 1024x768. Nothing wrong with your monitor.

[wp34]

This helps a lot.  I've suspected that you can't get it perfect (particularly Windows) but wasn't sure where to draw the line with my tweaking.  Thanks MonMotha.

It won't matter at 15 through 24khz. Or even playing PC games at 1024x768. Nothing wrong with your monitor.

I've noticed that.  Monitor looks great with games but just doesn't like Windows.  That won't be a problem once I get done configuring Mala and Mame.

It does click like crazy when booting.  I'm assuming that's because the monitor doesn't like the frequencies being sent to it during the boot cycle. 

[Gray_Area]

Monitor looks great with games but just doesn't like Windows.  That won't be a problem once I get done configuring Mala and Mame.

The dot pitch isn't fine enough for comfortable reading....although, I used it as my main PC monitor, as well as gaming, for a couple/few years. I noticed my focus got affected, so I made it gaming rig only. My quality of vision returned.

It does click like crazy when booting.  I'm assuming that's because the monitor doesn't like the frequencies being sent to it during the boot cycle. 

If it's clicking every time it changes resolution - bios, then Windows boot screen, then desktop - that's normal. If it's not displaying anything during one or more of those, and continuously clicking until the desktop, then something's weird. I don't have that issue. Of course, as your monitor's been sitting a while, it could be a component(s). WG caps are notorious for drying out after some years.

[repetto74]

Hi,

I have the same "defect" on my CRT monitor which now I understood is not really one. The problem is that areas on the screen where the pixel gap is larger looks darker which results in grey shaded bands on the screen edges.

I posted a request for this here but did not had a reply.
http://forum.arcadecontrols.com/index.php/topic,129200.msg1321150.html#msg1321150

 

[lilshawn]

Hi,

I have the same "defect" on my CRT monitor which now I understood is not really one. The problem is that areas on the screen where the pixel gap is larger looks darker which results in grey shaded bands on the screen edges.

I posted a request for this here but did not had a reply.
http://forum.arcadecontrols.com/index.php/topic,129200.msg1321150.html#msg1321150

 

sorry about that, The post probably just got passed over because not many people have heard of that particular brand of monitor before.

but yes, same idea.

[repetto74]

Hi Lilshawn

Yes the monitor brand is not very common but it is exactly the same chassis as the old Hantarex Polo monitors line.
Electronic System has produced a lot of Polo clones after Hantarex stopped activities.

I have a problem with the V-size where the image will not fit the entire screen height even if the pot is turned all the way (still have a small black bar on top and bottom) so maybe the grey band issue is also related to this screen size problem. I cannot find any documentation on this Vertical Yoke deflection issue (supposed this is where to look at)

[lilshawn]

Hi Lilshawn

Yes the monitor brand is not very common but it is exactly the same chassis as the old Hantarex Polo monitors line.
Electronic System has produced a lot of Polo clones after Hantarex stopped activities.

I have a problem with the V-size where the image will not fit the entire screen height even if the pot is turned all the way (still have a small black bar on top and bottom) so maybe the grey band issue is also related to this screen size problem. I cannot find any documentation on this Vertical Yoke deflection issue (supposed this is where to look at)

i replied there as not to cluttter up this thread.