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post #5221 of 5478 Old 01-25-2012, 04:26 PM
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A few more quickies..




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post #5222 of 5478 Old 01-28-2012, 10:38 PM - Thread Starter
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Ahem..... Some practice shots.







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post #5223 of 5478 Old 01-29-2012, 08:27 AM
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My G90
1920x817p72

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post #5224 of 5478 Old 01-29-2012, 10:14 AM
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My God, Cliff, it's like you're there! Definitely some reference shots!



b

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post #5225 of 5478 Old 01-29-2012, 11:07 AM
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Both those G90 owners shaot rock!!

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post #5226 of 5478 Old 02-04-2012, 07:49 AM
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A few more quickies, taking before warm-up and with ambient light in the room.

I'll dial it in later nad post back with more shots from this same BR.






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post #5227 of 5478 Old 02-04-2012, 07:28 PM
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More...




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post #5228 of 5478 Old 02-04-2012, 09:13 PM - Thread Starter
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Quote:
Originally Posted by mp20748 View Post

More...


Nice! Warming up the stack now
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post #5229 of 5478 Old 02-06-2012, 09:16 AM
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Yo Cliff,
what is a good BR to show the streaking in a G90?

And what scene, what should i be looking for. I have a few down days and have been working on the G90 streaking issue.

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post #5230 of 5478 Old 02-06-2012, 01:05 PM - Thread Starter
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Quote:
Originally Posted by mp20748 View Post

Yo Cliff,
what is a good BR to show the streaking in a G90?

And what scene, what should i be looking for. I have a few down days and have been working on the G90 streaking issue.

You know I haven't been seeing much if any streaking lately Mike to be honest with you. I think most of the streaking was attributed to the NEC switcher I was using. Not that it is gone 100% it's just pretty rare when it does happen........ I'll keep an eye out for you and let you know.
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post #5231 of 5478 Old 02-07-2012, 04:43 AM
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Quote:
Originally Posted by overclkr View Post

You know I haven't been seeing much if any streaking lately Mike to be honest with you. I think most of the streaking was attributed to the NEC switcher I was using. Not that it is gone 100% it's just pretty rare when it does happen........ I'll keep an eye out for you and let you know.

A cleaner source would diminish it greatly, and that's why you may not notice it.

We've already started on the G90 neck board mods, and also went after the streaking problem.


These shots (below) are from that same not-calibrated and and only center converged G90 that sits on a cart below my Marquee pointed to my screen. It is now fully modified that includes BA board, CRT driver boards and CRT socket boards. I'm using the same noise lowering changes I've made to my Marquees neck boards. In the process, I'm hoping I've also done away with the streaking. The image is VERY sharp and VERY intense. The bias adjustments had to be significantly lowered after the changes. The entire black level or low end performance is radically changed.

The shots can reveal a lot, but you would have to see this in action to understand what it looks like. and you will have an opportunity to see it in action, because If you're able to make it to Craig's next month, I'll be visiting him, and at that same time or there after, you should be able to see these changes yourself. I'm thinking around the second week in March.

The image is SUPER SHARP and CLEAN, VERY robust and BRIGHT. This is no doubt my best work so far..



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post #5232 of 5478 Old 02-08-2012, 05:24 AM
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More Super clean images from the G90..

still trying to find any streaking. None so far




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post #5233 of 5478 Old 02-08-2012, 08:57 AM
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No streaking there!! Nice work Mike.

With the BA mods alone the streaking would be clearly evident, emanating from the fluorescent tubes against the black background. Easiest scenes to evaluate the problem are scrolling white text credits at the end of a movie.
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post #5234 of 5478 Old 02-09-2012, 05:45 AM
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Quote:
Originally Posted by lewis View Post

No streaking there!! Nice work Mike.

I'm still doing everything to make it show up. As much as I do this kind of stuff, I'm really having a hard time believing the streaking is gone. I'm thinking I'm missing something, though at this point I believe I've done everything to make it show.

The thing I've been more focused on over the past few days is the huge improvement in gamma performance. The G90 is operating fully from its internal gamma chip circuit. And that same circuit is making a very dynamic gamma improvement after the changes that have been made. Just look at the last group of shots that I posted. There are almost NO dark areas or crevices in the scenes, and it's very representative of what I'm seeing on the screen itself. The images are very bright, sharp and crystal clear. And to add to that, it has exceptional gamma performance with no gamma at all from the source devices (Moome/BR).

Also, even when I had the Top Lumagen Video Processor on my Marquee, I did not get this bright and through a window effect like I'm seeing on this G90. I have to wait and see what Craig has to say once he checks this out, because I made sure I did not have the bias or gain too high, or the brightness level too high. I made sure the screen went completely black and that the contrast was on blast.


And I'm still using the same camera with the exact same 'Point and Shoot' settings as previously used in my other shots.

I'll do another round of shots tonight, and will post them here, but will focus and converge it this time. I'll use the exact same camera and settings and will show how well that simple camera will capture complete black and at the same time show illumination in normally dark areas that I was never able show before.

That gamma chip/circuit in the G90 is something I will for sure be trying to put into my Marquee.

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post #5235 of 5478 Old 02-10-2012, 08:14 AM
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A few more.

wasn't able to get back to the projector yesterday, nor was I able to dial things in better yesterday. So I fired it up again this morning a took a few shots with a little ambient light in the room.

These tree shots were taking with the contrast set at 85 and I also noticed that I could ramp the contrast up to MAX without any noticeable blooming. This is much like what happens on my Marquee with the higher contrast headroom before blooming. Which is the best rule for knowing you have a very low noise floor video chain.

Oh and before I forget, I'm not selling or doing these mods. They are being turned over to someone else. I'm just having fun playing with the projector and posting a few shots from time to time.

These shots are low light dark area scenes where you can see the light coming from a left or right direction.



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post #5236 of 5478 Old 02-10-2012, 02:51 PM
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A few more after a one hour tweating. Wish I had more time, though I find a lot of good things about the G90, there's plenty to not like about what's in the menu and how it all works.

And because of the weird way you have to converge, I was not able to do a much better converge, especially on the Blue.





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post #5237 of 5478 Old 02-12-2012, 03:50 PM
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A few more still totally right from the camera:




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post #5238 of 5478 Old 02-13-2012, 04:05 PM
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since I was not able to duplicate the streaking problem on this G90. Craig said it shows better on a black object or square on a full white. He also sent me a the test patterns he uses for this test.

I took screenshots of both patterns that I downloaded on a memory stick to USB on my BR player.

Still cannot see the streaking, and what I am able to see very cluseup on the screen itself, looks very similar to what the same pattern shows on my Marquee... still can't duplicate the streaking!!




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post #5239 of 5478 Old 02-13-2012, 06:55 PM - Thread Starter
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Mike,

I am sure I can reproduce it. If I remember correctly, my David Gilmour BD streaks. Let me pop it in and take a look.......

I dont see any streaking in those shots though.

Those shots looking good bro!
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post #5240 of 5478 Old 02-16-2012, 05:28 PM
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Quote:
Originally Posted by overclkr View Post

Mike,

I am sure I can reproduce it. If I remember correctly, my David Gilmour BD streaks. Let me pop it in and take a look.......

I dont see any streaking in those shots though.

Those shots looking good bro!

Cliff,
The Pulp Fiction shots are too good to be true; I need to come out and see for myself.

Reagrding the David Gilmour and streaking, did you find where it is? I'd like to know as I would like to see on my unit as well.

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post #5241 of 5478 Old 02-17-2012, 10:14 PM - Thread Starter
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Quote:
Originally Posted by wallace1234 View Post

Cliff,
The Pulp Fiction shots are too good to be true; I need to come out and see for myself.

Reagrding the David Gilmour and streaking, did you find where it is? I'd like to know as I would like to see on my unit as well.

wallace

I was too damn lazy to look lol. Here is tonights shots.













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post #5242 of 5478 Old 02-18-2012, 10:33 AM
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Humble 8" G70 screen shots re-sized 3:1


Screen shot photo courtesy of Z_Photo


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post #5243 of 5478 Old 02-19-2012, 06:00 AM
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Now back to the Marquee... I'll get back to the G90 later sometime, when I can get it back to the memory I had it operating on.

But for now, I'm warming and doing a little tweak-up on my Marquee.

Wish I had more BR, so have to go with what i have already until NetFlix puts the next one in the mail.





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can Kev come out and play?

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post #5244 of 5478 Old 02-19-2012, 10:06 AM
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Quote:
Originally Posted by overclkr View Post

I was too damn lazy to look lol. Here is tonights shots.




Wow, Cliff, those colors are just dazzling, the transparency is breathtaking! Compliments to Ken.

What movie is that?

b

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post #5245 of 5478 Old 02-19-2012, 10:08 AM
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Quote:
Originally Posted by AFryia View Post

Humble 8" G70 screen shots re-sized 3:1


Screen shot photo courtesy of Z_Photo


Screen shot photo courtesy of Z_Photo

Great! "Silky smooth", as the Zohan would say! Fixed pixel can eat their hearts out -

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post #5246 of 5478 Old 02-20-2012, 06:38 PM - Thread Starter
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Quote:
Originally Posted by Mr Bob View Post

Wow, Cliff, those colors are just dazzling, the transparency is breathtaking! Compliments to Ken.

What movie is that?

b

It's Speed Racer

Ken Whitcomb actually recalibrated the stack over the weekend. What an amazing job he did. My gamma is a bit shallow right now, but everything else turned out pretty much spot on!

This setup is simply unreal since the upgrades. I didn't even think it would be as good as it is now. Just breath taking to be honest.........
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post #5247 of 5478 Old 02-20-2012, 07:27 PM
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I sporadically follow this thread, although I haven't had a CRT since I sold my humble Sony 1252 in '04. Cliff, when you say "stack", is that 2 projectors with 1 image overlapping the other, or is it "blended"? Do you have any pics of your setup...and what do you do about fan noise?

Excuse the obvious questions.

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post #5248 of 5478 Old 02-20-2012, 07:32 PM - Thread Starter
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Quote:
Originally Posted by EJ View Post

I sporadically follow this thread, although I haven't had a CRT since I sold my humble Sony 1252 in '04. Cliff, when you say "stack", is that 2 projectors with 1 image overlapping the other, or is it "blended"? Do you have any pics of your setup...and what do you do about fan noise?

Excuse the obvious questions.

Yes I have 2 G90's that overlap. No blends here. I do not feel it is needed. I fan modded both of my G90's when I retubed recently and it is extremely quiet in my room now. I have pictures but cannot post tonight will post soon for you though.......
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post #5249 of 5478 Old 02-20-2012, 08:14 PM
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How much drift do you have? I found one 1252 needed at least weekly tweaking. Six tubes must be a challenge.

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post #5250 of 5478 Old 02-20-2012, 08:35 PM - Thread Starter
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Quote:
Originally Posted by EJ View Post

How much drift do you have? I found one 1252 needed at least weekly tweaking. Six tubes must be a challenge.

Nah, not at all. The Geometry pretty much stays solid, it's the static I have to touch up and it's roughly 3 minutes when needed. I really don't have to do much tweaking to be honest. It's the initial setup that knocks you on your rear
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