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dturco
Joined: 06 Feb 2009
Posts: 3778
Location: Eastern Shore Maryland
TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner
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| Posted: Wed Oct 20, 2010 2:39 pm Post subject: Need Fast Phosphor explained |
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Ok let's say you have some PT 22 fast phosphor tubes. You want to put them in a Marquee 9500 L/C. As I understand it the will put out less light [160Lumens] compared to LCP tubes [260 lumens] but they will be sharper.
I'm confused by this greatly. It may not be explainable in words but less light means less bright to me, so not good. But sharp to me means greater detail and perhaps focus, which sounds better but dimmer and counter-productive in the CRT world as dim as they are already.
So can anyone shed some light on this? 
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Wed Oct 20, 2010 3:11 pm Post subject: |
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i have a pt22 green and i am used to it now, it does output less light but in a dark room that is no problem to me at least.
they are razor sharp though and do not bloom that quick at high contrast levels, they are a great deal sharper then my red lcp.
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Tim in Phoenix
Joined: 21 Oct 2006
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Location: Phoenix
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| Posted: Wed Oct 20, 2010 3:12 pm Post subject: |
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Hello
I do not see why fast phosphor (P43) would be any sharper. It has a faster decay rate to enable 96hz frame rates used in stereoscopic display; one does not want left eye info on screen when the right eye info is rendered. P43 has less light output, and a tendency to flicker.
It is not ideal for standard 50hz/60hz video display.
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dvh99
Joined: 25 Dec 2009
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Location: nederland
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| Posted: Wed Oct 20, 2010 3:15 pm Post subject: |
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tim i describe what i see and that is a sharper grid with less blooming.
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ecrabb
Forum Moderator
Joined: 13 Mar 2006
Posts: 15909
Location: Utah
TV/Projector: JVC RS40, Epson 5010
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| Posted: Wed Oct 20, 2010 3:41 pm Post subject: |
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The concept is pretty simple, Tim. The faster-decay phosphor emits less light - basically it glows less. If it glows less, and for a shorter time, it will appear sharper, but of course at the cost of less light output.
SC
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Wed Oct 20, 2010 3:51 pm Post subject: |
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it does not appear sharper it is sharper.
it is not only the phosphor composition but the gun aperture too that is different.
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dvh99
Joined: 25 Dec 2009
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Location: nederland
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| Posted: Wed Oct 20, 2010 4:01 pm Post subject: |
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did you buy those pt22s from the buy and sell btw?
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dturco
Joined: 06 Feb 2009
Posts: 3778
Location: Eastern Shore Maryland
TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner
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| Posted: Wed Oct 20, 2010 4:07 pm Post subject: |
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| dvh99 wrote: | | did you buy those pt22s from the buy and sell btw? |
Yes, I did buy the PT -22's from here. I already have an LUG as a green, very worn, below a 7, but LCP for red and blue. The green is sharper and much more focused but I think that green always is right?
I've been thinking that the mismatched tubes have been making it impossible to get the low IREs correct.
The lower light output has me concerned a bit as I already feel that my machine is to dim. Yet the Green LUG is really bright compared to > R &B.
I might put them in just to find out if it makes a difference, if not, well I can always re-sell them...
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Last edited by dturco on Wed Oct 20, 2010 4:16 pm; edited 1 time in total
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dvh99
Joined: 25 Dec 2009
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Location: nederland
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| Posted: Wed Oct 20, 2010 4:14 pm Post subject: |
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those tubes were a steal at 1100 usd.
i bet you will like them for your 3d setup.
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dturco
Joined: 06 Feb 2009
Posts: 3778
Location: Eastern Shore Maryland
TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner
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| Posted: Wed Oct 20, 2010 4:18 pm Post subject: |
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| dvh99 wrote: | those tubes were a steal at 1100 usd.
i bet you will like them for your 3d setup. |
What 3D set-up?
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dvh99
Joined: 25 Dec 2009
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Location: nederland
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| Posted: Wed Oct 20, 2010 4:21 pm Post subject: |
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just guessing
the pinout for the pt22 tubes is exactly the same as the lcp tubes so if you want to replace the green lug with the pt22 you might have to unmod the neckboard although im not entirely sure.
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dturco
Joined: 06 Feb 2009
Posts: 3778
Location: Eastern Shore Maryland
TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner
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| Posted: Wed Oct 20, 2010 4:25 pm Post subject: |
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| dvh99 wrote: | just guessing
the pinout for the pt22 tubes is exactly the same as the lcp tubes so if you want to replace the green lug with the pt22 you might have to unmod the neckboard although im not entirely sure. |
Or get new TSE designed Neckboards
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dturco
Joined: 06 Feb 2009
Posts: 3778
Location: Eastern Shore Maryland
TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner
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| Posted: Wed Oct 20, 2010 4:50 pm Post subject: |
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| Tim in Phoenix wrote: | Hello
I do not see why fast phosphor (P43) would be any sharper. It has a faster decay rate to enable 96hz frame rates used in stereoscopic display; one does not want left eye info on screen when the right eye info is rendered. P43 has less light output, and a tendency to flicker.
It is not ideal for standard 50hz/60hz video display.
. |
Don't the Sony G-90's use LUGs, which I thought were p-43? No One has ever said a G-90 is dim.
What with that?
Oooppps,Eismann's replacements are the LUGs and they are not fast phosphor, I was confused. 
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dvh99
Joined: 25 Dec 2009
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Location: nederland
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| Posted: Wed Oct 20, 2010 8:47 pm Post subject: |
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50hz gives visible flicker 60hz does not.
i have played 12 hrs straight many many times with my ps3 and never noticed anything.
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Jeremy112
Joined: 28 Sep 2006
Posts: 2649
Location: Fond du Lac, WI
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| Posted: Wed Oct 20, 2010 10:29 pm Post subject: |
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Seems the G90 is the ultimate CRT all the way around, especially after all the years of reading about them on here. Where the hells my G90 then? 
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mp20748
Joined: 12 Sep 2006
Posts: 5689
Location: Maryland
TV/Projector: 9500LC Ultra / Super 02 and 03 VIM
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| Posted: Wed Oct 20, 2010 10:40 pm Post subject: |
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| dturco wrote: |
Don't the Sony G-90's use LUGs, which I thought were p-43? No One has ever said a G-90 is dim.
What with that?
Oooppps,Eismann's replacements are the LUGs and they are not fast phosphor, I was confused. |
Greg, advertises his tubes as being "Simulator Grade CRT's" - and If they are in fact true "Simulator Grade" CRT's, then they would have to be Fast Phosphor greens..
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dturco
Joined: 06 Feb 2009
Posts: 3778
Location: Eastern Shore Maryland
TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner
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| Posted: Wed Oct 20, 2010 10:42 pm Post subject: |
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| mp20748 wrote: | | dturco wrote: |
Don't the Sony G-90's use LUGs, which I thought were p-43? No One has ever said a G-90 is dim.
What with that?
Oooppps,Eismann's replacements are the LUGs and they are not fast phosphor, I was confused. |
Greg, advertises his tubes as being "Simulator Grade CRT's" - and If they are in fact true "Simulator Grade" CRT's, then they would have to be Fast Phosphor greens.. |
Great that just confuses me more 
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