Originally Posted by napos
Damn Mike!!!! Having this focus at a contrast setting of 83 on a Marquee is sick!!!!! Congrats on the new mods!!!!
I am a very satisfied user of your previous mods. I have both the VIM mod and the neck boards mod since I believe 2008 on my 8500.All I can say is that my tubes have over 13,000 hours on them, but my focusis even better than when the tubes had 0 hours due to Mike's mods.
The only issue I had was with low IRE detail, which was crushed after the modded boards were installed
I do want to let everybody know, however, that Mike did offer to fix that free of charge. However, I had already ceiling mounted the projector and it would be too much of a hassle to lower it and remove the boards.I am compensating the issue with a gamma correction from the Moome HDMI card and a gamma correction from the Lumagen Radiance XS.
I did not want to change my G2 levels in order to bring out more low level detail to avoid raising the black level floor.
I cannot recommend Mike's mods strongly enough. They are by far the best upgrade I have ever performed on my 8500. Much better focus, sharpness, and ridiculously high bandwidth!!!
I've been spending the past two weeks trying to understand this problem napos mentioned in this post. he has received and installed the later version boards from me, to report that he's still having this same problem with the new boards. He also says the problem goes away with the stock VIIM board. I've had a problem very similar to this back in maybe 2006 or 2007 that was later corrected, and was with only one other person bringing it to my attention. Since then and before, I've never gotten anything but praise concerning low level performance. Craig Rounds has calibrated quite a few Marquees with my mods, and he always talk about how good the low end performs. He recently calibrated a Marquee back in December of November of last year.
Looking at the problem since getting the boards to napos has had me trying to figure out what could be causing the problem he's having. It was until last nigh when I got a phone call from beerbujit who posted the post below after coming over and seeing my setup:
Originally Posted by beerbujit
Hey Mike, Thanks for letting me see your new IMPROVED mods. Once again I was floored at what I saw. For those following this thread the pictures on here DO NOT do the mod justice.As Mike said I could not see ANY blooming when contrast was taken to the max. I have to admit I was checking out the digitals a little bit and now, as before I think I'll keep the old dinosaur..On serious M.P. steroids though:D I really wish the pictures here would show the amount of detail in the blacks. You know Mike I have seen 5th element LOTS but it was once again a NEW experience
. My hat is off to you Sir Mike, Now I'll just wait for my turn nicely and watch what I have... is it done yet?
So beerbjit came over and was blown away by what he saw on my setup. He later got a set of neck boards from me that had the very latest mods. And i had also repaired his VIM that had a short in it. He then installed the boards and reported back (on this thread) that he was operating his Marquee with a stock VIM, because HIS modified VIM when put in the projector caused lines on the left of the picture, and the picture still did not look like what he saw on my setup.
Anyway, I got a call from him yesterday, and from that conversation we both determined that his problem is his CRT's. This is something we knew from the beginning, because his Marquee 8500LC was in my shop way back in 2005 or 2007 or sometime between. At that time I had to replace his LVPS because it had high Filament voltage, and the tubes showed serous low end problem, though they worked and has been in use since then. But they were never able to focus thigh, or show 1800p resolved.
So after our chat last night, beerbujit is on the look-out for a set of tubes list.
Something I may have forget to mention is that the mods will not work properly if the tubes are not up to par. I've posted a thread on my forum that will allow testing for this before purchase. The test will show if the boards are workable for the mods, and will also show if the CRT's have been affected from high filament voltage.
Also, both Craig and I don't use the gamma in the moome card. All of the Screenshots I post do not use the moome cards gamma. It is disabled on my moome card. I don't use it because it does not adjust the gamma in a linear fashion. It ramps up the entire low end and this can effect the TRUE low end performance.
But as beerbjit indicated above: "I really wish the pictures here would show the amount of detail in the blacks"
My setup puts the entire low end on display. And it can do it without any gamma. I was just in the HT verifying the low end using DVE.
so over the past two weeks, napos and i have been shooting PM's back and forth. But the only thing I have not asked him to try is 1080P. The latest version of the mods should make 1080P easy to get resolved on a previously setup Marquee (8500 or 9500 60 or 72hz) but that's only if the tubes are 1080P capable. And if the tubes are not 1080P capable. They would also have low end problems.
The set I sent to Italy, once the boards were installed this is what was reported:
"New and never seen details, perfect colourimetry, and sharp sharp images
" and he's running 1080P /72hz - he also claims that both 60hz and 72hz have the same sharpness.
Reported from Raphael:
"The Marquee's picture is now on a completely different level.
The picture quality is so amazing it is hard to believe it is so good. It gave the Marquee inky black blacks,
deeply saturated colors and is razor sharp just like Velvia slide film
So with only two projectors witt this low end problem, one has bad tubes for sure. The other I'll need to get jury out and await the results. If 1080P 60 or 72hz is not achievable on a previously setup marque after the mods are installed. And if the low end also suffers, there is most likely a problem with weak or defective CRT's. And on any set that has that problem, you would not only be missing low end performance, but the ability to reproduce the entire IRE is not there. Nor would you be able to see a full ramp test pattern. meaning no video linearity.
I can take a break now..Edited by mp20748 - 3/27/13 at 5:08am