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zGman
Joined: 22 May 2006
Posts: 599
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| Posted: Tue Mar 15, 2011 4:03 am Post subject: |
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Hi Craig - That measurement was closer to spec than I expected also.
I tried to eliminate as many variables as possible. The meter was
"self-calibrated" recently - but that may not ensure accuracy.
I aimed into the green lens, and turned off the red and blue channels.
I used a geometric pattern from displaymate to get substantial output
but still had to turn down contrast to avoid overload. The meter seems
very sensitive - I found it was picking up input from various nightlights
and computer leds, and spent a while eliminating the extraneous light
to get the final reading. So - while on test patterns on my (cheap wilsonart)
screen the grn primary seems a little limey - the direct output from the lens
looks pretty good.
Last night I did a set up at 72 Hz and by eye there was more output, perhaps
I will have time to do a comparison to 60 Hz with the meter tomorrow.
But with all the uncertainty with meters, screen types, eyeballs, and expectations -
I think we will have to wait and see what you find out with your topline equipment.
G
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CIR Engineering
Joined: 25 Aug 2008
Posts: 4269
Location: Chicago USA & Berlin Germany
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| Posted: Tue Mar 15, 2011 3:54 pm Post subject: |
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| zGman wrote: | Hi Craig - That measurement was closer to spec than I expected also.
I tried to eliminate as many variables as possible. The meter was
"self-calibrated" recently - but that may not ensure accuracy.
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I used to own an eye1 and it is a very strange meter. What I find with them is that the first measurement right after a "dark reading" is usually somewhat accurate. However, each subsequent reading after the first becomes less and less accurate with respect to both luma level and saturation. I found that if one keeps taking subsequent readings, that the luma and saturation will move further and further in the same direction from the first reading after the dark reading. I have forgotten, but I think the eye1 reads darker and darker and less and less saturated the more readings after the dark (but it might be the other way, I sold my eye1 over two years ago). I seem to recall that with green the eye1 also usually reads more blue in the green than is true (but maybe it is less... fuzzy).
| zGman wrote: | I aimed into the green lens, and turned off the red and blue channels.
I used a geometric pattern from displaymate to get substantial output
but still had to turn down contrast to avoid overload.
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Yeah, I was wondering how exactly you got a reading with the eye1 pointed directly into the lens and thought that maybe you used the diffusion attachment. What you did in turning down contrast was a better solution for the saturation measurement because the diffuser may affect the saturation reading, but turning the contrast lower cannot alter the coordinates of the green primary. ie the physical properties of the phosphor and CElement do not change with respect to contrast level 
| zGman wrote: | The meter seems very sensitive - I found it was picking up input from various nightlights
and computer leds, and spent a while eliminating the extraneous light
to get the final reading. So - while on test patterns on my (cheap wilsonart)
screen the grn primary seems a little limey - the direct output from the lens
looks pretty good.
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Yeah, any ambient light will influence the meter. Good thing is that unless said ambient light is saturated green, it would have most likely made green appear further under saturated, which would ave obviously caused your green primary reading to be worse.
| zGman wrote: | But with all the uncertainty with meters, screen types, eyeballs, and expectations -
I think we will have to wait and see what you find out with your topline equipment.
G
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That's why I ordered a tube 
Thanks again for taking the measurements.
craigr
_________________
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JohnHWman
Joined: 15 May 2007
Posts: 215
Location: France - Grenoble
TV/Projector: Sony VPH-G90U (one unit for me, four others units repaired and sold)
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| Posted: Fri Mar 25, 2011 9:35 am Post subject: Re: P43 LUG Tubes: Who is interested? |
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| CIR Engineering wrote: | | Is anyone interested in brand new (NOS) Panasonic P43 LUG green tubes? These are the rapid decay green phosphors designed for 3D stereoscopic rendering. |
Hello Craig,
As already stated through PM, I'm in for one P43 phosphore P19LUG to test it on my G90
John
_________________
Home theater enthusiast for over 20 years !
My dedicated HT room !
Last edited by JohnHWman on Thu Apr 21, 2011 11:39 am; edited 1 time in total
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CIR Engineering
Joined: 25 Aug 2008
Posts: 4269
Location: Chicago USA & Berlin Germany
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| Posted: Fri Mar 25, 2011 12:12 pm Post subject: Re: P43 LUG Tubes: Who is interested? |
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| JohnHWman wrote: | | CIR Engineering wrote: | | Is anyone interested in brand new (NOS) Panasonic P43 LUG green tubes? These are the rapid decay green phosphors designed for 3D stereoscopic rendering. |
Hello Craig,
As already stated through PM, I'm in for one P43 phopsphore P19LUG to test it on my G90
John |
Glad you posted John as I did not get the PM. I will order you one.
Meanwhile I have heard nothing back from the manufacturer. I think they are in trouble with long delays after the disasters. Now it seems Japan needs to bring in bottled water for Tokyo and all 13,000,000 people. My god what a mess they have there 
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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JohnHWman
Joined: 15 May 2007
Posts: 215
Location: France - Grenoble
TV/Projector: Sony VPH-G90U (one unit for me, four others units repaired and sold)
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| Posted: Fri Mar 25, 2011 3:54 pm Post subject: |
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So true Craig,
Japan people need a lot of help from worlwide : a real mess 
About P43, there is no hurry at all to test it, it can be done this summer without any problem on my side
Thank you.
John
_________________
Home theater enthusiast for over 20 years !
My dedicated HT room !
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