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racerxnet
Joined: 20 Jun 2007 Posts: 362 Location: Illinois
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Link Posted: Sun May 15, 2016 12:44 pm Post subject: Test patterns |
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I have been working on my 8500 trying to get the best possible picture. Here are some test patterns I took of the output at 720p.
MAK
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Tim in Phoenix
Joined: 21 Oct 2006 Posts: 4379 Location: Phoenix
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Link Posted: Sun May 15, 2016 7:53 pm Post subject: |
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Hello
If you want the best picture, get some 9" LUGs from cmjohnson and solve the problems associated with air coupled lenses that were never very good. It will be a revelation for you.
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greg9518lc
Joined: 19 Apr 2016 Posts: 360
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Link Posted: Fri May 27, 2016 6:39 pm Post subject: |
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Good to see you are moving forward there is alot more potential out of those 8" tubes. Looks like you need a good astig/focus setup and a calibration and you will hit another level.
_________________ VDC 9518LC modded: I do not sell or promote mods only interested in the best PQ possible......
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racerxnet
Joined: 20 Jun 2007 Posts: 362 Location: Illinois
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Link Posted: Sat May 28, 2016 2:18 am Post subject: |
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Hi Greg,
Those shots are a 1080p test displayed at 720p. I did the initial test to see if I could resolve 720. After that I masked the tubes and reset mechanical focus. I will try 1080p after I get back from vacation. My eyes hurt from moving rings and yokes many times. Have to bust the glue so the convergence grid is square to the tube and screen. Never was level since I got it and hate seeing the skew at 2 electrically. Otherwise , thanks for the note. I'll post more shots after another round.
Mak.
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greg9518lc
Joined: 19 Apr 2016 Posts: 360
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Link Posted: Sat May 28, 2016 6:23 pm Post subject: |
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Great Mak, you are getting closer for sure look forward to your progress as it will get better.
_________________ VDC 9518LC modded: I do not sell or promote mods only interested in the best PQ possible......
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racerxnet
Joined: 20 Jun 2007 Posts: 362 Location: Illinois
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Link Posted: Thu Jun 16, 2016 3:22 pm Post subject: |
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1 Pixel 10.08 Mhz @ 1080p x 60hz shots of my 8500. I use Calman's pattern generator for my HTPC. These are a white field, so all 3 tubes lit at 60% brightness.
Mak
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greg9518lc
Joined: 19 Apr 2016 Posts: 360
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Link Posted: Thu Jun 16, 2016 3:29 pm Post subject: |
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Those are looking pretty good. How you liking the picture these day's?
_________________ VDC 9518LC modded: I do not sell or promote mods only interested in the best PQ possible......
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racerxnet
Joined: 20 Jun 2007 Posts: 362 Location: Illinois
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Link Posted: Thu Jun 16, 2016 4:05 pm Post subject: |
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The picture looks very good after working on the gray scale. I want to max the raster usage for output. When I set it up, the image was just inside the tube face and I had banding on the left side. Looking at the tube, I could see black masking being drawn on the tube face. Very faint, but noticeable. Once I shrank that inside the tube, the banding disappeared. I want to look into making sure I use all the tube face for light output. Just not sure why there was banding. The convergence grid was centered on the install. Anyhow, I will continue on with the project.
Will have someone come out and calibrate it properly once its dialed in. I'd like to move the PJ forward if possible after working on raster usage.
Mak
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greg9518lc
Joined: 19 Apr 2016 Posts: 360
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Link Posted: Tue Jul 12, 2016 1:44 pm Post subject: |
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racerxnet wrote: | The picture looks very good after working on the gray scale. I want to max the raster usage for output. When I set it up, the image was just inside the tube face and I had banding on the left side. Looking at the tube, I could see black masking being drawn on the tube face. Very faint, but noticeable. Once I shrank that inside the tube, the banding disappeared. I want to look into making sure I use all the tube face for light output. Just not sure why there was banding. The convergence grid was centered on the install. Anyhow, I will continue on with the project.
Will have someone come out and calibrate it properly once its dialed in. I'd like to move the PJ forward if possible after working on raster usage.
Mak | .
It's nice to see you making even more progress and moving forward. You are right a good calibration will
take it to the next level.. Your convergence grid was centered with your pc on and not internal patterns
there would be no shift.
_________________ VDC 9518LC modded: I do not sell or promote mods only interested in the best PQ possible......
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racerxnet
Joined: 20 Jun 2007 Posts: 362 Location: Illinois
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Link Posted: Fri Jul 22, 2016 1:27 pm Post subject: |
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Red Quail lens for testing. Hoping to see an improvement over the HD 144's on the PJ now.
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greg9518lc
Joined: 19 Apr 2016 Posts: 360
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Link Posted: Wed Jul 27, 2016 11:34 pm Post subject: |
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How's the new lens working out?
_________________ VDC 9518LC modded: I do not sell or promote mods only interested in the best PQ possible......
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racerxnet
Joined: 20 Jun 2007 Posts: 362 Location: Illinois
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Link Posted: Thu Jul 28, 2016 1:53 am Post subject: |
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greg9518lc wrote: | How's the new lens working out? |
Greg,
I am off work for 4 days and will finally have some time to tinker. I only have the Red lens to test with. Will post some shots of both in a couple days. Hope all is well with you.
Mark
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greg9518lc
Joined: 19 Apr 2016 Posts: 360
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Link Posted: Thu Jul 28, 2016 2:58 pm Post subject: |
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racerxnet wrote: | greg9518lc wrote: | How's the new lens working out? |
Greg,
I am off work for 4 days and will finally have some time to tinker. I only have the Red lens to test with. Will post some shots of both in a couple days. Hope all is well with you.
Mark |
Thanks Mak as is well on vacation this week have been making progress testing some new boards we have figured out and
fixed my previous boards so the meet will be moving forward as planned. Glad I did not wait for a glass half full. Look forward
to your results and I soon will post smpte patterns of old boards then repaired boards tested and calibrated at 72hz. A major
improvement over 60 hz tested boards.
_________________ VDC 9518LC modded: I do not sell or promote mods only interested in the best PQ possible......
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racerxnet
Joined: 20 Jun 2007 Posts: 362 Location: Illinois
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Link Posted: Thu Jul 28, 2016 5:01 pm Post subject: |
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Greg,
Is Kurt in town yet? It would be nice to meet with you two sometime. We are not that far from each other.. I am still running Mikes boards at 60hz. I don't see judder or it does not bother me at all. Maybe it's because I am getting old and senile... Be great to have some experienced hands tinker with my set up.
Mark
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greg9518lc
Joined: 19 Apr 2016 Posts: 360
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Link Posted: Fri Jul 29, 2016 5:10 am Post subject: |
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racerxnet wrote: | Greg,
Is Kurt in town yet? It would be nice to meet with you two sometime. We are not that far from each other.. I am still running Mikes boards at 60hz. I don't see judder or it does not bother me at all. Maybe it's because I am getting old and senile... Be great to have some experienced hands tinker with my set up.
Mark |
Yeah he will be over soon enough but not until we finish our project and we look forward to meeting you.
_________________ VDC 9518LC modded: I do not sell or promote mods only interested in the best PQ possible......
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racerxnet
Joined: 20 Jun 2007 Posts: 362 Location: Illinois
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Link Posted: Sat Jul 30, 2016 2:37 am Post subject: |
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Had some time to mount the Red Quail lens and compare some test material. The first thing that stood out to me was that the image size of the Quail lens is the same as the HD144. I did not move the projector forward or back, just mechanical focus and electrical focus. Did a comparison of the star chart with both lenses, Red tube on, and could not see any appreciable increase of resolution. I wanted to, but I will not convince myself it's better. The quail lens focuses well in the corners. The mechanical focus has to be touched up on the other colors, but for this quick test Red was my main concern. It was hard to get a good picture of the red starburst. All pictures are from the Quail lens.
Mark
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gjaky
Joined: 05 Jun 2010 Posts: 2790 Location: Budapest, Hungary
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Link Posted: Sat Jul 30, 2016 6:10 am Post subject: |
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Forget that starburst pattern, it has no usable feature for fixed pixel raster displays other than generating moire pattern. Instead use proper 1:1, 2:2, 3:3 test pattern, or full screen small text for readability. In the other thread I also wrote down how can you evaluate the optical quality of the lens, that also worth a try.
_________________ projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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greg9518lc
Joined: 19 Apr 2016 Posts: 360
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Link Posted: Sat Aug 20, 2016 3:47 pm Post subject: |
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racerxnet wrote: | Greg,
Is Kurt in town yet? It would be nice to meet with you two sometime. We are not that far from each other.. I am still running Mikes boards at 60hz. I don't see judder or it does not bother me at all. Maybe it's because I am getting old and senile... Be great to have some experienced hands tinker with my set up.
Mark |
Kurt will be here end of September thru October 20th. Going to setup the projector for the October meet and then head out
on his calibration and setup tour and pop back in for the meet. Look forward to meeting you Mak
_________________ VDC 9518LC modded: I do not sell or promote mods only interested in the best PQ possible......
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