CurtPalme.com Home Theater Forum

[stridsvognen]

[stridsvognen]

[stridsvognen]

[stridsvognen]

Blue tube

[Nashou66]

Its the blue, I found adjusting the G2 for say 20% white wil also affect 80% white just as much and it shouldn't.

So I found having a low Blue Drive and using the G2 to get both 20 and 80 ire's as close as possible.

Nashou

[stridsvognen]

[Nashou66]

Kurt this how you have to do it.

Set green drive to about 70-75 and never touch it again.

Now set Green G2 till you do do not see the raster. 0% white should not bee seen on the tube face.

never touch green G2 again

Now use only red and blue.

Now her is the trick, every once in while when you see your having trouble getting a flat Greyscale lower brightness a few clicks( 30 clicks with Marquee control program) and raise contrast one click. I think I ended up with Brightness at 48 and contrast at 73.

My G2's were very low, below 60's


Now the only thing I can think of is that your tubes emissions are shot.

It should have the newer LVPS with the good heater element fix but you never know how they had this thing set up. even if there is no tube wear there might have been cathode wear. And that could be why your having low output and trouble calibrating.

Nashou

[Nashou66]

Oh you have the i1 Pro D3. that is a tri stimulus and will drift over time. Also if your using HCFR I know they started up again and have not kept up on the thread at AVS. But I remember someone saying they got the new i1 Display Pro top work with old driver but they had issues.

If you look on E-bay people are dumping the older version of the i1 Pro Spectro-radiometer that I have.

You should get one of those to use to profile your Display Pro with.

Also what is your video chain? Are you sure you have the right Video level and the right Color spaces all the way through out.

I was going back and forth with Spectracal about my i1 Pro Spectro thinking it was bad, they said they never had a bad one go through their lab, even 10 year old ones. So After months of getting aggravated I realized I had two different color spaces BD was set at 442 and the Processor was at 444 in and out.

Athanasios

[stridsvognen]

Well for now its not so much about the probe.. it is how it is.. OK.. My grayramp supports my readings, ill look at probes when i get my HT up Again, but untill now ill do wit what i have, i just calibrated my JVC X7 to feath with this one.. and it looks amasing even beeing a digital.

Chain is OPPO 83 Lumagen Radiance XS+ moome V3 im using the radiance test patterns, and i tested both 422 and RGB out, same result, as it should be.

Its getting dark now, so im giving it one more shot at calibrating a decent grayscale.

HCFT is working fine with the probe, the only problem i have is with the new HCFR i cant adjust dark reading time, and that seems to be needet with CRT.

[Nashou66]

Fly me up, i'll dial it in for ya!!


Nashou

[ronaldus]

Hi everybody,

Could it be that kurt has a P43 phosfor? Those give lower light output at 60 or 72 Hz. Since the projector comes from some simulator it could well be a 3d simulator.

It's just an idea.

Cheers,

Ron.

[stridsvognen]

Put all the ultra boards back, but its teasing me a bit, its like brightness is not rhe same every time i turn it on, sometimes i have to turn it Down to 0 or the tubes will be bright with a 0% IRE, other time 50 is ok.. And then there is some anoying bugs in the 5.0 firmware.. when calibrating if pressing mute to remove the info when adjusting G2, if pressing exit your stuck, and need to restart the projector and start all over Again.

And now suddently convergense is cracy, starting with green and red, its fine in the center.. green id the fixed pattern, but when moving to anywhere outside the center it starts to move the green instead of red.. Im getting a bit anoyed..

[Nashou66]

you hooked up the HDM cables wrong.

Why oh Why did you take it apart all together?



Oh and for mute just press mute again to see the menu, exit closes everything out.

Like I said use the Marquee controller program to calibrate. No need for the remote or onscreen display at all.

Nashou

[barclay66]

Hi,

Just another idea concerning the calibration problem:

Using a tube tester/regenerator (Müter BMR 90) I made some measurements (beam current vs G1 voltage) on my spare tubes. I was interested how the tube's age would have an influence on its system's emission capability. As we know, most tubes don't reach their end of life due to low emission. Instead, they are replaced because of phosphor wear or burn. Well, with my measurements I could verify that the emission capability really isn't too much different between almost new and really worn tubes (regarding their phosphor). It can be recognized as an overall degradation of the beam current.

BUT: Each tube has its own characteristic emission curve (see picture with some samples)!

So, Your problem could be the tube itself. Maybe Your green has a bump in its emission curve and this nonlinear behaviour is causing the phenomenom described (deviation in color balance over different intensity levels).

Regards,
barclay66

[stridsvognen]

[stridsvognen]

[stridsvognen]

well its over for today, just got smoke out of the blue channel on the convergence board.. dont know why.. Ill pull it out and not touch anything else today..

[stridsvognen]

Anyone with a a diagram of the convergence board so its possible to see the value of R669 and R671, they are 2 resistors in paralel to the center leg of the transistor, ill think around 1,6 ohm

[Nashou66]

Those are 1.2 ohm, there are 4 onthe outputs of each channel. Check the diodes there as well. the 1n4003's

Athanasios

[Nashou66]

Oh and make sure you didn't put the convergence cable on wrong or off one leg. That might blow those resistors, other wise i can not see what else would cause it. there is also R614 and 611 1k and 10ohm respectively. Might as well check C606 as well, the 22 uf cap.

nashou