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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Sat May 04, 2013 3:21 pm Post subject: |
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I don't have an elevated pedestal.
Even with out using the Lumagen. But As I said before I can always just lower the 0 Luma spot in the lumagen to lower Black to black. It does not affect the other levels from 2.5-10% white. Jim at lumagen did a great job with the algorithm of what happens to gamma at the in between % whites levels the adjustments make. So when adjusting 5% and 10% the interpolation for 6,7,8,9, are done very well.
I have a pattern that has 101 % white levels and I can see them all after my eyes adjust to the darkened room. I can see 1%,2%,3% etc. but I admit that from 95-100 I can not se the difference. Whites are crushed . But low levels are fine.
Mike what Colorimeter do you use?
Nashou
_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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stridsvognen
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| Posted: Sat May 04, 2013 3:26 pm Post subject: |
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| Nashou66 wrote: | I don't have an elevated pedestal.
Even with out using the Lumagen. But As I said before I can always just lower the 0 Luma spot in the lumagen to lower Black to black. It does not affect the other levels from 2.5-10% white. Jim at lumagen did a great job with the algorithm of what happens to gamma at the in between % whites levels the adjustments make. So when adjusting 5% and 10% the interpolation for 6,7,8,9, are done very well.
I have a pattern that has 101 % white levels and I can see them all after my eyes adjust to the darkened room. I can see 1%,2%,3% etc. but I admit that from 95-100 I can not se the difference. Whites are crushed . But low levels are fine.
Mike what Colorimeter do you use?
Nashou |
Can you also do it with a 2.23 gamma, and no radiance.?
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stridsvognen
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| Posted: Sat May 04, 2013 3:33 pm Post subject: |
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| Nashou66 wrote: | | stridsvognen wrote: | | I was looking for the mentioned thread about how to change a stigmator board into a ultra board, i would like to add those vima caps on my non ultra board to see if it will make a improvement. |
Just use the ferrite Clamps. TDK Z-Cat i think is the brand I used. I used a large size.
Nashou |
Sorry i ment the vertical board. It has some mods done on the Ultra board, i would like to know the value of the resistors and capasitors, so i dont need to take my ultra board apart and measure it.
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Sat May 04, 2013 5:56 pm Post subject: |
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| stridsvognen wrote: | | Nashou66 wrote: | | stridsvognen wrote: | | I was looking for the mentioned thread about how to change a stigmator board into a ultra board, i would like to add those vima caps on my non ultra board to see if it will make a improvement. |
Just use the ferrite Clamps. TDK Z-Cat i think is the brand I used. I used a large size.
Nashou |
Sorry i ment the vertical board. It has some mods done on the Ultra board, i would like to know the value of the resistors and capasitors, so i dont need to take my ultra board apart and measure it. |
I think this thread
https://www.curtpalme.com/forum_archived/viewtopic.php@t=19215.html
Has most of the info for converting a non Ultra CVA and VDM to an ultra one.
And why are you so against using the lumagen to get the Low end Gamma Correct?
I do not know of any CRT that has a flat gamma all the way from 100-0 % white. it is the nature of CRT.
That is why Moome added the Gamma boost function for the low end. CRT's naturally drop off in light out put and will crush blacks in the very lowest % whites. Unless you formulate a new Phosphor this will be the case. Or some how are able to have different levels of phosphor on the tube where a different electron beam is used for the low end and one for the rest.
I also have measure the Voltages of the video signal at the large resistors. Put the scope on the top of the large resistor and put the internal stair step up. You can set G2 this way too so each stair step matches in voltage increase.
Then I also made a t connector for the Video input to measure the voltage from the VNB. 0 % white from the lumagen was 0
volts. My oppo was a bit high so I had to drop the level in the Oppo to get 0 volts on the VNB input.
White was a bit high so I had to lower that as well a click in the oppo.
I have to make another t connector as I can't find the one I made, my shop is a mess.
Also are you sure the moome card your using is set properly for gamma? Did you measure the voltage on the RGB outs
as they go into the vim showing a 0% white and 100% white. one should be 0 vdc and .7 vdc. A scope is best for this so you can see it Peak to peak. Gamma has to be off in the moome. remote all the way down and the pot turned off as well.
Athanasios
_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
One Smart Dog!!!
Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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stridsvognen
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| Posted: Sat May 04, 2013 6:45 pm Post subject: |
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Thanks for the link, anyone ever done the same to the vertical board.?
On my old non ultra is was able to make a flat gamma run on red and green, only thing that could use a bit of help was blue.
i lowered the gama in my DVDO or Radiance, and it was a almost perfect 2,23 gamma with no custum gamma corection from a radiance.
take a look on my last calibration before i got the radiance. running 75hz from the DVDO VP50.
Black was blacker than the devils ass.
Ohh look at the light output.. almost 11fl on a 90" screen gain 1.0
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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stridsvognen
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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stridsvognen
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| Posted: Sat May 04, 2013 8:22 pm Post subject: |
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| Nashou66 wrote: | What points are you using to calibrate?
Because your way off on 80% your DE at 20 is good get the 80 the same.
You color temp is way off after 40%. your too concerned about the low end.
Work on getting 20 and 80.
Gamma means nothing if colors have that bad a DE through out the greyscale.
Nashou |
This calibration was to ilustrate the flat gama on red and green, i I had Little experience calibrating at that time, and new to CRT
I have made better calibrations later where i got blue almost perfect in high and low ende, and just a Little twist in the mid,
Im super sensitive to bad color balance at low level, i much prefer to high color temp in the high ende as a trade in if needet.
My point is that i prefer to calibrate the projector as perfect as possible, and i have seen how close it can get, and just adding a bit og corection to blue via the radiance.
Ill much prefer my vidikron with a DVDO VP50 over my JVC X7 with perfect measure result from a 125 poinc cms calibration.
The radiance is a powerfull tool but not perfect in my eyes, so the less you use it less problems. I like to have it mostly to corect my JVC and run 72- 75 Hz on the crt.
What conserns me most about calibration is that i come perfect out of Black, and green never dominates the color balance.
There is no way i could do a flat gamma run on green and red with the line mod instaled, and a perfect balance comming out of Black with no corection.
Ill prefer having perfect 5% IRE and 100% and then corect whatever in betwen,like i find it very dificult to corect low level perfect in the radiance.
Im quite sure that if i went for a higher gamma like 2.35-2.40 i would be even better, like no need for gamma factor corection at all in the processor.
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stridsvognen
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| Posted: Fri May 10, 2013 3:03 pm Post subject: |
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I just calibrated my Marquee 8500AC machine last night, fast one, but it looks like i remember calibrating my old 9500. red and green runs perfectly together, and just the blue have to play with the focus.
I was quite surpriced that i had 12fl on screen from a 8500AC machine without much bloming, and a perfect color balance at 100% IRE. I put id down to 10 fl.
So for now ill prefer the 8500Ac machine over the 9500LC ultra with PT22 green tube.
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stridsvognen
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| Posted: Sat May 11, 2013 9:41 am Post subject: |
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Here is a HCFR file of my 1st. fast calibration on the 8500AC.
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stridsvognen
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| Posted: Tue May 14, 2013 5:48 pm Post subject: |
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Just got the last parts missing, and my Ultra convergence board up running again. I have been on for 1½ hour now all adjustments looks fine, so i hope that was that. No more smoke please.!!
My 8500AC is now a ULTRA machine with all functions working. 
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stridsvognen
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| Posted: Sun Jun 16, 2013 12:35 pm Post subject: |
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Just instaled the new green tube, its on the floor running some netflix using all the tube face with a contrast set to 20, just to burn in the new tube.
I cant wait to get it on the screen. I see scanlines looking into the lenses running 16:9 1080P 72hz..
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Aussie_Al
Joined: 18 Feb 2009
Posts: 47
TV/Projector: NEC 9PG, XG1101, XG1350
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| Posted: Sun Jun 16, 2013 1:36 pm Post subject: |
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Which machine was the new green for? the 8500, VV1 or the 9500?
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stridsvognen
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| Posted: Sun Jun 16, 2013 1:43 pm Post subject: |
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| Aussie_Al wrote: | | Which machine was the new green for? the 8500, VV1 or the 9500? |
Its for the 9500LC Ultra with only 800 hours on the tubes, it was with a PT 22 green tube, and thats a no go for me.. No light and terrible gamma run.
Ill not forget to look what tubes is in the next 9500 i buy.. 
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stridsvognen
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| Posted: Mon Jun 17, 2013 2:28 pm Post subject: |
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While all the projector was apart i moved the HV leads and splitter.. It made me feel much better putting my hands Down adjusting the magnets last night in the dark.
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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stridsvognen
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| Posted: Mon Jun 17, 2013 8:58 pm Post subject: |
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| Nashou66 wrote: | | stridsvognen wrote: | | While all the projector was apart i moved the HV leads and splitter.. It made me feel much better putting my hands Down adjusting the magnets last night in the dark. |
That might be a good idea!! How didi the image look any different?
Nashou |
Cant say.. I dident notice anything, then ill have to put it back when i get used to looking this projector, im still adjusting and calibrating on it, its 2nd day with the new tube, and just put it up instead of the 8500 ultra.
I also removed the cables going from the shields on the tube to the neck boards, and put them directly to chassis.
I cant see any reason to ground them true to the neck boards.
Ill see if i get any problems later... Worked fine last night..
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stridsvognen
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| Posted: Fri Jun 21, 2013 9:14 am Post subject: |
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Now i have seen a few movies on my 9500LC, and i can only say... WOW.. Thats nice.. The new tube was needet.
The machine is mostly standard, but im using the MP VIM and Moome Card, and have the filtered LVPS in it.
And then there is all my different grounding, and moving the HV splitter.
I might start to get a idea what these HD10E lenses do.
Yesterday i seen Operation Valkyrie, must have seen that one 80 times, its my reference movie, i know it inside out.
I seen details i never seen before on my VV1 or my JVC X7, i was amased.
When i get the MP neck boards, ill test the difference from stock VIM and neck boards, against those MP boards, and see how much i can blame them for the differences.
With my 8500 AC Ultra i can say that my JVC have a chance at some points, but getting back to a good 9500LC, then im back to not even thinking about any digital projector..!!
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