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napos
Joined: 21 Oct 2006 Posts: 164 Location: Athens, Greece
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Link Posted: Tue Dec 12, 2017 12:29 am Post subject: Marquee 9500 contrast and brightness settings. |
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I am curious to see what settings most of you are using, especially, contrast. I mostly want to see what contrast setting you would consider to be "safe" as far as balancing image punch and tube life.
I am currently using a Moome card with gamma correction. If I set the G2 as per Tim's recommendation I end up with a setting of Contrast 50 and Brightness 32, using the C option on the Moome card (Black boost) and full gamma. My screen is 80" X 45 ", with a 1.2 gain.
Nicholas
_________________ Marquee 9500LC Ultra with MP mods, Moome HDMI 1.3 card, Lumagen Radiance XS, Oppo 83 BluRay, Toshiba XE-1 HD-DVD, HTPC with Media Player Classic.
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Curt Palme CRT Tech
Joined: 08 Mar 2006 Posts: 24301 Location: Langley, BC
TV/Projector: All of them!
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Link Posted: Tue Dec 12, 2017 2:21 am Post subject: |
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When I set the G2 up, I use a setting of 60 and 60.
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napos
Joined: 21 Oct 2006 Posts: 164 Location: Athens, Greece
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Link Posted: Tue Dec 12, 2017 4:54 pm Post subject: |
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Curt Palme wrote: | When I set the G2 up, I use a setting of 60 and 60. |
I remember reading this at an older Marquee black level thread on AVS. What do you consider a safe maximum contrast setting to maintain tube life as much as possible?
_________________ Marquee 9500LC Ultra with MP mods, Moome HDMI 1.3 card, Lumagen Radiance XS, Oppo 83 BluRay, Toshiba XE-1 HD-DVD, HTPC with Media Player Classic.
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gjaky
Joined: 05 Jun 2010 Posts: 2790 Location: Budapest, Hungary
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Link Posted: Tue Dec 12, 2017 9:49 pm Post subject: |
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I think the only reasonable answer to your question would involve the light output from the tubes. Contrast value is just a number and as it is it have no strict connection to tube life.
_________________ 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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jbltecnicspro
Joined: 23 Apr 2016 Posts: 512
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Link Posted: Tue Dec 12, 2017 10:24 pm Post subject: |
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Yeah, what gjaky said. Tube drive (the white balance / grey scale settings) also affect light output and ultimately, tube life.
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Curt Palme CRT Tech
Joined: 08 Mar 2006 Posts: 24301 Location: Langley, BC
TV/Projector: All of them!
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Link Posted: Tue Dec 12, 2017 10:57 pm Post subject: |
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gjaky wrote: | I think the only reasonable answer to your question would involve the light output from the tubes. Contrast value is just a number and as it is it have no strict connection to tube life. |
Well, higher numbers do push the tubes harder, and wear the phosphor out faster, but you're right, there are many variables outside of just brightness and contrast settings that determine tube and phosphor life.
Bottom line answer is: as low of a setting as possible.
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napos
Joined: 21 Oct 2006 Posts: 164 Location: Athens, Greece
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Link Posted: Wed Dec 13, 2017 3:05 am Post subject: |
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I have always kept the contrast at 50. My drive/G2 settings are:
R 24/67
G 87/64
B 40/62
When I had my 8500 AC I got up to 15,000 hours on the tubes with similar settings. It was still good to go for more, and I only switched to the 9500 LC Ultra, because I found a great deal of NOS tubes from Curt a few years ago.
_________________ Marquee 9500LC Ultra with MP mods, Moome HDMI 1.3 card, Lumagen Radiance XS, Oppo 83 BluRay, Toshiba XE-1 HD-DVD, HTPC with Media Player Classic.
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cmjohnson
Joined: 03 Apr 2006 Posts: 5180 Location: Buried under G90s
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Link Posted: Fri Dec 15, 2017 12:04 am Post subject: |
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I've never really had the time or a good enough meter to find out, but I am curious to see how different base settings affect grey scale tracking and calibration and tube life.
Running a series of tests with brightness and contrast set at, for example, 30/30, 40/40, 50/50, 60/60, etc. and then comparing the
results would be kind of interesting.
I personally want a Marquee set so that contrast is at 50 and brightness is at 30 and the picture is as good as it can be.
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napos
Joined: 21 Oct 2006 Posts: 164 Location: Athens, Greece
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Link Posted: Sun Dec 17, 2017 10:16 am Post subject: |
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Chris, when I set up my G2, as per Tim's technique, I end up with similar results, using full gamma on the moome card and the C option (black boost). The picture is very puchy, perfect low level details and perfect black levels. A fade to black scene is absolutely black!
_________________ Marquee 9500LC Ultra with MP mods, Moome HDMI 1.3 card, Lumagen Radiance XS, Oppo 83 BluRay, Toshiba XE-1 HD-DVD, HTPC with Media Player Classic.
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