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CIR Engineering
Joined: 25 Aug 2008
Posts: 4269
Location: Chicago USA & Berlin Germany
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| Posted: Wed Jun 02, 2010 2:36 pm Post subject: |
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| CZ Eddie wrote: | My 8500 with "8" blue/red and "6" green has a pinkish tinge to an all white field, despite my greyscale calibration using a meter & Kal's guide. So unless I'm missing something, there is a limit to how far you can take a tube.
Sure, the picture looks good and I'm nitpicking since it would be considered white, until you actually see real white. But still. |
If the gray measured correctly on the meter and you have a pink tinge than something is wrong.
However, if you ran the green gain up to max and lowered the red to near min, and adjusted blue, and you still have a pink tinge than the green tube can no longer emit enough light compared to the red and blue and you can not balance the grayscale anymore with the existing green tube.
craigr
_________________
JETI 1501-HiRes 2nm Spectroradiometer
JETI 1211 Spectroradiometer
Photo Research PR-650 Spectroradiometer
Klein K10-A Colorimeter
Murideo Fresco SIX-G HDMI 2.x Multimedia Generator
Murideo Fresco SIX-A HDMI 2.x Analyzer
Light Illusion ColourSpace XPT Color Calibration Software
Light Illusion LightSpace XPT Pro Version 10.x Color Calibration Software
OMARDRIS JVC Software Patch to use K10-A and Jeti with JVC OEM AutoCal Software!
Sencore CR7000 CRT Tube Analyzer / Rejuvenater
Authorized Dealer for Lumagen & just about everything worth buying 
www.CIR-Engineering.com - craigr@cir-engineering.com
Phone: 865-405-6892
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Spanky Ham
Joined: 22 Mar 2006
Posts: 5643
Location: Comedy Central
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| Posted: Wed Jun 02, 2010 6:35 pm Post subject: |
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| VideoGrabber wrote: | > It is funny that some new guys can get hung up on tube condition, when they haven't even purchased a pj yet. <
Not that surprising. It's the one concrete thing they may actually be in a position to evaluate. And remaining life left on the tubes will be inversely proportional to the visible wear.
> Like you said, even some poor tubes can still look good if set up properly. <
Quite true. That, however, is the thing that's really surprising. |
I should have added or seen a pj yet, but you are correct.
| CIR Engineering wrote: | | CZ Eddie wrote: | My 8500 with "8" blue/red and "6" green has a pinkish tinge to an all white field, despite my greyscale calibration using a meter & Kal's guide. So unless I'm missing something, there is a limit to how far you can take a tube.
Sure, the picture looks good and I'm nitpicking since it would be considered white, until you actually see real white. But still. |
If the gray measured correctly on the meter and you have a pink tinge than something is wrong.
However, if you ran the green gain up to max and lowered the red to near min, and adjusted blue, and you still have a pink tinge than the green tube can no longer emit enough light compared to the red and blue and you can not balance the grayscale anymore with the existing green tube.
craigr |
What is the usual disparity between tubes that would render one tube unusable? Would it be say a "5" green tube with new red and blue tubes?
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CZ Eddie
Joined: 23 Mar 2006
Posts: 1601
Location: Austin, TX
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| Posted: Wed Jun 02, 2010 8:02 pm Post subject: |
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| CIR Engineering wrote: | | CZ Eddie wrote: | | My 8500 with "8" blue/red and "6" green has a pinkish tinge to an all white field, despite my greyscale calibration using a meter & Kal's guide. |
If the gray measured correctly on the meter and you have a pink tinge than something is wrong.
However, if you ran the green gain up to max and lowered the red to near min, and adjusted blue, and you still have a pink tinge than the green tube can no longer emit enough light compared to the red and blue and you can not balance the grayscale anymore with the existing green tube.
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I just checked.
COLOR / DRIVE / G2
Red / 10 / 60
Green / 100 / 66
Blue / 22 / 65
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Back after a digital sabatical.
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CIR Engineering
Joined: 25 Aug 2008
Posts: 4269
Location: Chicago USA & Berlin Germany
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| Posted: Wed Jun 02, 2010 11:12 pm Post subject: |
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| CZ Eddie wrote: | | CIR Engineering wrote: | | CZ Eddie wrote: | | My 8500 with "8" blue/red and "6" green has a pinkish tinge to an all white field, despite my greyscale calibration using a meter & Kal's guide. |
If the gray measured correctly on the meter and you have a pink tinge than something is wrong.
However, if you ran the green gain up to max and lowered the red to near min, and adjusted blue, and you still have a pink tinge than the green tube can no longer emit enough light compared to the red and blue and you can not balance the grayscale anymore with the existing green tube.
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I just checked.
COLOR / DRIVE / G2
Red / 10 / 60
Green / 100 / 66
Blue / 22 / 65 |
Well, you have a tiny bit of range left. Reduce your red drive to zero. Then balance blue as best you can... use a meter if you have one
Also, cehck your low IRE (30 IRE) and set G2 to that for 6500. Changing the G2 could give you more range for the drive.
craigr
_________________
JETI 1501-HiRes 2nm Spectroradiometer
JETI 1211 Spectroradiometer
Photo Research PR-650 Spectroradiometer
Klein K10-A Colorimeter
Murideo Fresco SIX-G HDMI 2.x Multimedia Generator
Murideo Fresco SIX-A HDMI 2.x Analyzer
Light Illusion ColourSpace XPT Color Calibration Software
Light Illusion LightSpace XPT Pro Version 10.x Color Calibration Software
OMARDRIS JVC Software Patch to use K10-A and Jeti with JVC OEM AutoCal Software!
Sencore CR7000 CRT Tube Analyzer / Rejuvenater
Authorized Dealer for Lumagen & just about everything worth buying
www.CIR-Engineering.com - craigr@cir-engineering.com
Phone: 865-405-6892
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CIR Engineering
Joined: 25 Aug 2008
Posts: 4269
Location: Chicago USA & Berlin Germany
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| Posted: Wed Jun 02, 2010 11:13 pm Post subject: |
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| CIR Engineering wrote: | | CZ Eddie wrote: | My 8500 with "8" blue/red and "6" green has a pinkish tinge to an all white field, despite my greyscale calibration using a meter & Kal's guide. So unless I'm missing something, there is a limit to how far you can take a tube.
Sure, the picture looks good and I'm nitpicking since it would be considered white, until you actually see real white. But still. |
If the gray measured correctly on the meter and you have a pink tinge than something is wrong.
However, if you ran the green gain up to max and lowered the red to near min, and adjusted blue, and you still have a pink tinge than the green tube can no longer emit enough light compared to the red and blue and you can not balance the grayscale anymore with the existing green tube.
craigr |
What is the usual disparity between tubes that would render one tube unusable? Would it be say a "5" green tube with new red and blue tubes?[/quote]
Can't say really. The condition of the gun also plays a role, not just the phosphor. You can sometimes use a tube restorer to improve the gun and get more range.
craigr
_________________
JETI 1501-HiRes 2nm Spectroradiometer
JETI 1211 Spectroradiometer
Photo Research PR-650 Spectroradiometer
Klein K10-A Colorimeter
Murideo Fresco SIX-G HDMI 2.x Multimedia Generator
Murideo Fresco SIX-A HDMI 2.x Analyzer
Light Illusion ColourSpace XPT Color Calibration Software
Light Illusion LightSpace XPT Pro Version 10.x Color Calibration Software
OMARDRIS JVC Software Patch to use K10-A and Jeti with JVC OEM AutoCal Software!
Sencore CR7000 CRT Tube Analyzer / Rejuvenater
Authorized Dealer for Lumagen & just about everything worth buying
www.CIR-Engineering.com - craigr@cir-engineering.com
Phone: 865-405-6892
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