CRT experience..

[stridsvognen]

Just did some playing around with the Marquee, and guess what.. going from 1080P 72 to 817P 96hz makes for a 25% boost in light output.. So my 72hz 14fl calibration is douing 17,5fl at 96hz, and the tracking holds, and running same bandwidth on both resolutions.. 195Mhz.

[alangouger]

Is Mike Parker still in business modifying CRT boards?
I remember there was Mike and a few other guys modifying these things in the states.
The good ole days!

[stridsvognen]

Is Mike Parker still in business modifying CRT boards?
I remember there was Mike and a few other guys modifying these things in the states.
The good ole days!

He is.. But its troublesome to say it mildly.. I made a deal with him over a year ago where i bought and installed and calibrated a NIB NOS Marquee in his basement.. And around  ½ year ago he canceled the deal.. keeping the projector, and not paying/ forfilling his part of the deal.
And then there is the thing that there is no 2 the same MP mods.. So if you see and like one, he is not able to reproduce it, and out of all the MP mods i bought true time i cant remember one of them working the first time, they all needet cleaning and repair, and its been like that as late as Oktober 2019 year where in US to install 2 projectors, had to replace the MP moddet neckboards, and do a lot of repair and improvements on the VIMs as they were all from not working to just bad performance.

Mike has come up with some interesting ideas, but there has been way to many troublesome cases, from boards not working after multiple atempts sending back, and months if not years passing without a solution.

So if someone wants to try out a MP mod ill recommend to get a set for testing, and not pay a single $ unless your pleased with the result.

And ill recommend we let that be the talk about that, ass it gets pretty ugly and tiresome if everybody that had problems with MP has to tell the story.

I have a set of prototype mods i have great hope for, from Gabor, now he is a very skilled guy, and very professional in his actions and work. So ill recommend taking a look in that direction for mods.

I have done some moome and neckboards, and repaired/ improved a few MP vims.. But i dont sell mods, only done it together with full setup and calibration, wich normaly takes 2-4 days. That way i can test and prepare from home and bring backup for everything, and have a good idea of what the end result will be in advance.

[ask4me2]

Just did some playing around with the Marquee, and guess what.. going from 1080P 72 to 817P 96hz makes for a 25% boost in light output.. So my 72hz 14fl calibration is douing 17,5fl at 96hz, and the tracking holds, and running same bandwidth on both resolutions.. 195Mhz.

Not sure I understand the benefit of running the CRT projector with higher refresh rates than the original spec. I think it will be ok to tweak and change some old caps and give the neck boards ,VIM etc. higher "headroom" so the control of the beam is running at it best, but will a higher refresh rate solve  spot size or the 24 frames/s when watching a movie?

Some of the bottle necks in a CRT projector are the processes in the necks and the tube itself, is there a benefit to run these components with higher Hz and more energy than they are designed to do? 
25% more light output may also results in 25% shorter lifespan for the tube face and "gun", there will be more heat generated in the magnetic etc. ...

I am of the opinion there is a benefit to run a CRT projector with as low frequency and load as possible. So using a setup with 1920 1080p at 48Hz or skipping the need of using time to scan and draw the black bars in a 2.35:1, may be a better way of tweaking.

[stridsvognen]

Not sure I understand the benefit of running the CRT projector with higher refresh rates than the original spec. I think it will be ok to tweak and change some old caps and give the neck boards ,VIM etc. higher "headroom" so the control of the beam is running at it best, but will a higher refresh rate solve  spot size or the 24 frames/s when watching a movie?

Some of the bottle necks in a CRT projector are the processes in the necks and the tube itself, is there a benefit to run these components with higher Hz and more energy than they are designed to do? 
25% more light output may also results in 25% shorter lifespan for the tube face and "gun", there will be more heat generated in the magnetic etc. ...

I am of the opinion there is a benefit to run a CRT projector with as low frequency and load as possible. So using a setup with 1920 1080p at 48Hz or skipping the need of using time to scan and draw the black bars in a 2.35:1, may be a better way of tweaking.

48hz looks god awfull, it flickers a lot.. 60hz still have flicker, nothing you realy notice, but it suffers from motion judder from the odd framerate, 72hz is perfect flicker free and a frame tripling of the 24hz source..
Sure you wear the tubes faster the more light you pushes out of them.. But the interesting about the ability to push a lot of light is that you can then lower contrast and be pretty sure to get a more linear response to bandwidth and gain.

What CRT do you use, and how are you feeding it.?

[stridsvognen]

Here is a shot i made of a Marquee i put together today. Its a standard Marquee with LCP tubes, VDC neckboards and a 02vim, and a old V1 moome card.. Running 1080P 72hz 195Mhz VS the latest MP mods running 1080P 60hz 148Mhz.

Both pics shot with a old 10Mp CCD sensor camera, and i resized my file to match the MP one.

[Greg9518LC]

They say screenshots don't matter but when stock Marquee that you setup and calibrated
To 10ftl and a highly modded Marquee doing around 6ftl then I would say there is alot of snake oil being sold to unknowing customers. I know if I was in the market for a Marquee properly setup and calibrated you would be the first person I would call. Kurt you are truly the guru on knowing what works and doesn't with the Marquee. The best quality you have is being able to document your work and expose the things that don't work with the Marquee. Keep up the good work and I also like your 4K thread why it will never work on a CRT projector.

[stridsvognen]

A few pics of the standard projector comming together.

[ask4me2]

48hz looks god awfull, it flickers a lot.. 60hz still have flicker, nothing you realy notice, but it suffers from motion judder from the odd framerate, 72hz is perfect flicker free and a frame tripling of the 24hz source..
Sure you wear the tubes faster the more light you pushes out of them.. But the interesting about the ability to push a lot of light is that you can then lower contrast and be pretty sure to get a more linear response to bandwidth and gain.

What CRT do you use, and how are you feeding it.?

I am using a G90 with 1080p@60 directly from a BD player at the moment...

[stridsvognen]

I am using a G90 with 1080p@60 directly from a BD player at the moment...

Thats also pretty much the best option for the G90 as it dont have as much raster ringing and will do well with standard timings, it will also do well with 817P 72hz wich will be even lower bandwidth, ill think around 133Mhz vs 148Mhz and smoother motion for 2.35:1 movies.

[stridsvognen]

New projector up running.. Lug tubes and special boards.. 14fl 1080P 72hz 195Mhz.

Fast and sloppy setup, needs some serious work on focus and calibration.

[stridsvognen]

Today was the day where i got my first CRT projector with a tube that shows visible burn.
Picked up a old 1996 Marquee 9500 with fungus, scratched lenses and full of dust from 12500 hours with the tubes on.

Spendt a bit of time to get it to life, and thought it would be fun to man handle up on a table and shoot it on my scren, so here it is just setup, and playing a movie before i take it apart.

[stridsvognen]

pic of the green tube and top cover off.

[stridsvognen]

Good stuff collected..
LVPS after 12500 hours with no attention at all.

[stridsvognen]

Got the old green tube out today to change bellow and glycol, so it becomes usefull for testing without leaking all over the chassis.