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noos@xp37+
Joined: 17 Jun 2008
Posts: 464
Location: Berlin/Munich
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| Posted: Thu Jan 28, 2010 1:17 pm Post subject: P43 phosphor - projector models/numbers and part numbers |
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Hello,
I want to gather some informations where the P43 phosphor is used. (I know about it's disadvantages when watching (2D) movies, but I want to build a homemade (single projector) 3d simulator with shutter glasses and high gain silver curved screen for compensating the poor brightness of such a setup)
Please add any information on projectors and or tubes using the P43 phosphor.
Here is my (dream) favorite:
Sony VPH G70VRU (VRM) is equipped with P43
PK-SDG70 should be the the G70 tube with the P43 (G70VRU?)
So what about Barcos (and their Retros?), and any other machine? Are there 7" P43 tube/projectors out there or any ES machines? I know there are a lot of Marquees out with P43, so please add these informations (I am Marquee newbie)
Best regards from Munich
Marc
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CIR Engineering
Joined: 25 Aug 2008
Posts: 4269
Location: Chicago USA & Berlin Germany
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| Posted: Thu Jan 28, 2010 3:33 pm Post subject: |
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I never can keep what phosphor is in which tube straight so I can't contribute to the answer. But I am also very interested in knowing more about this for CRT 3D applications.
Good questions and I hope this thread generates a lot of info!
craigr
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noos@xp37+
Joined: 17 Jun 2008
Posts: 464
Location: Berlin/Munich
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| Posted: Mon Feb 01, 2010 6:07 am Post subject: |
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Hello,
I found this page with useful Marquee numbers and p43 model numbers, but no tube numbers:
http://www.etechvideo.com/techtip4.htm
Thanks for your post so far
Marc
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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Francis Vaughan
Joined: 28 Jul 2009
Posts: 12
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| Posted: Thu Feb 04, 2010 12:55 pm Post subject: |
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I have a BG808s with fast green. Rather unhelpfully Barco saw fit to place their own sticker over the Sony sticker. I peeled it off, and was rather amused to discover that the tube says: "D7MFP2-LA (G) Engineering Sample." The number is handwritten, and subject to error in my reading.
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noos@xp37+
Joined: 17 Jun 2008
Posts: 464
Location: Berlin/Munich
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| Posted: Thu Feb 04, 2010 7:27 pm Post subject: |
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| Francis Vaughan wrote: | | I have a BG808s with fast green. Rather unhelpfully Barco saw fit to place their own sticker over the Sony sticker. I peeled it off, and was rather amused to discover that the tube says: "D7MFP2-LA (G) Engineering Sample." The number is handwritten, and subject to error in my reading. |
Hello,
and thanks for your efforts! Is it a Seos Barco (for curved applications)? Can you post a picture if possible?
Best regards
Marc
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kschmit2
Joined: 09 Mar 2006
Posts: 1141
Location: Heidelberg, Germany
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Thu Feb 04, 2010 9:56 pm Post subject: |
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hi i have a marquee with p43 fosfor
wanna swap it with a 2002 ultra model  mine is from 2000.
what are the disadvantages when watching 2d movies?
_________________
1 answer always poses multiple questions.
marquee 9500ultra HD10L moome hdmi1.3 v3+ some mods.
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brenwaterys
Joined: 26 Nov 2006
Posts: 70
Location: Spokane, WA
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| Posted: Fri Feb 05, 2010 2:10 am Post subject: |
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Just bought a set of Marquee / Barco tubes that unexpectedly included a 180dmb43 green. Not quite what I expected but another entry for the list of tubes with P43 phosphor.
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noos@xp37+
Joined: 17 Jun 2008
Posts: 464
Location: Berlin/Munich
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| Posted: Fri Feb 05, 2010 7:33 am Post subject: |
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| dvh99 wrote: | hi i have a marquee with p43 fosfor
wanna swap it with a 2002 ultra model mine is from 2000.
what are the disadvantages when watching 2d movies? |
P43 disadvatages:
-light output is significantly lower
-the green is more/creates more yellow, and if you filer it, you will loose even more light
-P43 is made for 96hz refresh rate and more - so there might be a flicker issue with 50/60hz
But as mentioned above, this thread gives more data:
http://www.curtpalme.com/forum/viewtopic.php?p=234279#234279
Best regards from Munich
Marc
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Francis Vaughan
Joined: 28 Jul 2009
Posts: 12
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| Posted: Fri Feb 05, 2010 12:00 pm Post subject: |
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| noos@xp37+ wrote: | | Is it a Seos Barco (for curved applications)? Can you post a picture if possible? |
It is conventional projector, not curved. If you mean a picture of the sticker, well that will be hard. It was mostly destroyed as I took it off. I read the number though the back of the sticker as the printed part adhered to the Barco sticker that covered it. I can try to get a useful pic, but it will tak a bit of work.
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backslap
Joined: 26 Jan 2009
Posts: 36
Location: the netherlands
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| Posted: Sat Feb 06, 2010 10:59 am Post subject: |
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I also have a Marquee 8500 Ultra with a green P43 tube.
I also have a spare green P22 lying around. The P43 tube is a 9 and the P22 is a 7.
Should I replace the green tube?
The current picture is very nice IMO, especially with HD-144 color filtered lenses.
Is the difference really that big?
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noos@xp37+
Joined: 17 Jun 2008
Posts: 464
Location: Berlin/Munich
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| Posted: Sat Feb 06, 2010 2:29 pm Post subject: |
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| backslap wrote: | I also have a Marquee 8500 Ultra with a green P43 tube.
I also have a spare green P22 lying around. The P43 tube is a 9 and the P22 is a 7.
Should I replace the green tube?
The current picture is very nice IMO, especially with HD-144 color filtered lenses.
Is the difference really that big? |
Hello,
if you like your picture: Never change a running system...Never change the winning team.
Can you compare it to a normal phosphor system? If, please post your opinion.
Here is something I found on the tube life of P43:
....(P43) have thinner phosphor for faster response and thus burn quicker....
It is from that post:
http://www.avforums.com/forums/crt-projectors/1041202-seos-prodas-barco808s-advice-needed-6.html
Can anyone tell us about his experience on P43 lifetime. I only have seen sets with a P43 green. And on them, green was more worn than normally.
Marc
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Sat Feb 06, 2010 8:15 pm Post subject: |
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i have p43, the green tube has clearly more wear then blue and red so yes if they were put in the same time they wear faster.
_________________
1 answer always poses multiple questions.
marquee 9500ultra HD10L moome hdmi1.3 v3+ some mods.
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Francis Vaughan
Joined: 28 Jul 2009
Posts: 12
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| Posted: Sun Feb 07, 2010 3:47 am Post subject: |
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A few things I have found when reasrching the P43 phosphors. Some of this repeated from a parallel thread.
The P43 phosphor is faster than a conventional green, but that is about all. It doesn't seem greatly faster than the conventional red or blue. I have never noticed any flicker across a wide range of frame rates.
The colour of the P43 is a curious issue. Because it has a couple of peaks in the red, unfiltered it looks yellowish. However it has an almost ideal emission in the green, a single very narrow spike at 545nm. So if you filter off the red spikes it will probably end up with a purer green than the conventional phosphor. Filtering should not produce much acutal loss of light output, again because almost all of the light output is exactly the wavelength you want. However with dye filters there will always be some loss. (If someone has both a spectrophotometer and a green c-element and could measure the insertion spectra of the c-element it would be just brilliant.)
Different phosphors have different wear rates. This is independant of the drive level. The different phosphors degrade for different reasons, some get contaminated, some get disrupted by the incident electrons over time. All degrade. Clearly a need to drive a phosphor harder won't help matters.
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noos@xp37+
Joined: 17 Jun 2008
Posts: 464
Location: Berlin/Munich
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| Posted: Sun Feb 07, 2010 3:00 pm Post subject: |
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here is somthing I found on brightness:
....i can't comment on brightness, I had a P43 green which was very dim
but was told that the LUG's a re slightly dimmer than P22 LCP's
maybe 10-20%.
my P43 green only had around 7 ftL , with the P22 LUG green I get 14.5 ftL....
from that post:
http://www.avsforum.com/avs-vb/showthread.php?t=852409&highlight=nidi+green
Regards
Marc
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