CurtPalme.com Home Theater Forum

[Angus_rg]

So that's what people are talking about.... I just put a color filtered hd145 on my marquee, and if I didn't know better, I'd have thought it was bleeding. It is redder than a boozing Santa Clause. I do have to say, the green(on my LC lens) didn't seem much different, but the difference between the reds are night and day.

I can't wait to finish the setup. I have a feeling I'd take the HD145 w/ a red to the picture of an 8500LC with a green C-element any day of the week.

[CRT_Ben]

[draganm]

the marquee also suffers from poor color saturation simply from the electronics. The video chain, neck-boards and other parts in stock form really wash it out.
It's why NEC's and other machines which use the same panasonic tubes and same Phosphor were always touted as having "better colors". ?It's not just the lenses

[perisoft]

Dragan, how's it possible for the saturation to be altered by the electronics unless they're propping up the black level? Are they generating some kinda crosstalk between the signals, so that a full red signal is matched to g and b to some extent? If the other tubes aren't active at all, it doesn't seem like it's possible for saturation to be affected - red output is either off or on, but the red tube can't make desaturated red any more than it can make green or blue...

[Nashou66]

Color saturation does have more to do with the Lens's than electronics, but What dragan says does have some weight if referring to all colors together for saturation, not individual. For individual it doesn't really matter how the scan lines are drawn by the electronics they are placed where they are and thats it,Sure sharper precise placement on the phosphor matters too and this will be mentioned, but if your going to be mixing colors on the screen for various shades of colors beside the primaries so lets say the secondary colors electronics and also the CPC (Color Purity Control) magnets affect this much more.

To get the correct secondaries or any other shade of a color to be correct, each individual color must be drawn on the screen over the other colors scan exactly for that specific color to be correct. The CPC magnets are more critical hence the name Color Purity Control, if the phosphor is not lit up where it should be there will be bleeding of colors, so you need those dots to be perfect. Electronics have a part in this as well, if the focus fluctuates or the convergence drifts a bit the color saturation will be off due to each color not being drawn exactly over the others. So back to individual colors, this wont matter as much from the electronics but will from the CPC magnets, if the dots are flared the green primary will not read the same once you do make the dot pitch perfectly round. experiment with this bye measuring with an accurate probe, they will not read the same, as luminance will also change affecting the overall outcome.

So to get the best and closest colors and to keep them stable you need to correct the primary limitations of the phosphor with color corrected lens's, good focus from the lenses and the CPC magnets and stable electronics to draw each individual scan line exactly where it should be drawn.

At least this is my own theory

Athanasios

[dturco]

Geez, It's always the magnetics with you isn't it?

[Nashou66]

[dturco]

[Nashou66]

[garyfritz]

Angus, remember you need to recalibrate to get your colors RIGHT now... and then it'll be gorgemous!