[deronmoped]

The manual says that you should be in the recommended range of -10% to +10% for vertical keystone. With my PJ moved farther forward then normal I'm having to use more then the reccomended value, -45% for red and +26% for blue. What problems could this cause? And why do they give you the extra adjustment if they do not want you using it?


Also are other owner's of PG's using more then the recommended +- 10% for V-KEY?


Thanks, Deron.

 

[Marshall F]

And just to be crystal clear, when they (manual) say +-10% - they mean it's safe from 40% to 60%, correct?


I'll have to pull up the manual, but one area said 560%. That seemed odd.


Marshall

 

[deronmoped]

Marshall


Do you mean they are over protective about the settings on these PG's?


Deron.

 

[kschmit2]

Normally it will cause you more drifting as you put more stress on the convergence circuit.


Kai

 

[Chris Bigos]

Just checked and my B is +54 and R is -49, which seem pretty well balanced. Ceiling mount, with throw closer than stock like you. Not having any (apparent!) problems.


Checked the green while I was there and it’s +10. Which, now I think about it, bugs me a little. With a perfect mechanical setup it should be zero?


Gee – thanks for giving me ANOTHER thing to fret about!


I’m cursed with an unhealthy desire for perfection. I know it’s bad, but I can’t help it! I can hear you all now, thinking “Well he shouldn’t have gotten into CRT PJs then!â€.


I must overcome this tendency to keep tweaking until everything that can be zero IS zero!

 

[deronmoped]

Chris


You know what is strange about our "Zero Quest"? Every time us CRTers get back into the setup of the PJ, we find out the settings do get closer to zero. And that is after we are sure we did everthing we could do the last time around


Deron.

 

[Doug Baisey]

A new phrase to use "Zero Quest" I like how that sounds. Doug

 

[techman707]

Quote:

Originally posted by Doug Baisey A new phrase to use "Zero Quest" I like how that sounds. Doug

Doug,


While I know nothing is perfect, in Deron's case, shouldn't the Blue & Red be theoretical mirrors, the + and - be just about identical if the rasters are perfectly centered?


Bruce

 

[Doug Baisey]

Bruce,

That would depend if the deflection yokes are exactly in the same spot on the red and blue. Doug

 

[Doug Baisey]

You will have some variance even if the tilt is zeroed on all three tubes and mechanically aligned to match the green. Not much but some depending if the lenses, spacers, and toe in are exactly the same. Doug

 

[techman707]

Yes, I realize that, but the variance in Deron's case seems excessive, 45/26.

 

[Mark_A_W]

Only on a G70 Bruce

 

[Doug Baisey]

If the lens tilt is in the 'slot' instead of the single hole check that they are the same for red and blue. Also you can 0 tilt for red and blue without storing to check how it aligns with green if the green is at 0. After that you would need to normalize V keystone balance for both to see where its coming from. You could end up a bit closer. Doug

 

[techman707]

Quote:

Originally posted by Mark_A_W Only on a G70 Bruce

Careful the way you talk abouyt "the magic" projector. I don't know why the G70 causes so much penis envy.

 

[Oliver Klohs]

Deron,


I have the impression that the value +/- 10 only refers to the green tube, and I have never had a single problem with several PG's when I only checked this value for green and let blue and red fall where they may.


Of course it helps if you toe in the other tubes correctly - sorry , couldn't resist


Oliver

 

[techman707]

Quote:

Originally posted by Oliver Klohs Deron, Of course it helps if you toe in the other tubes correctly Oliver

Especially if you're using a 10PG, since it's already a bastard machine and they only made 2.....yours and Olivers. Although there's enough scrap from one to make a mopedwhen it dies.

 

[deronmoped]

Bruce


Hell, with the scrap you should be able to build a couple of small foreign cars too


Deron.

 

[deronmoped]

Would not moving the PJ over so the red (the red V-KEY being more off then the blue) is more in line with the centerline of the screen be the fix?


The closer I get either the red or blue tube to the centerline position that the green occupies should mean they should get closer to how much V-KEY that the Green uses, which should be none.


The image on the face of the tube is so close to the edges that I have no room to move that there.


Deron.

 

[Oliver Klohs]

Deron,

keep your image centered, that's your best and safest bet.

I wouldn't worry too much about those values, after all what could happen as a worst case ?

Some board could pop that is easily fixable with the PG chassis - there are just so many around and did I mention for much less than the G70 ?

Oliver

 

[techman707]

Quote:

Originally posted by deronmoped Would not moving the PJ over so the red (the red V-KEY being more off then the blue) is more in line with the centerline of the screen be the fix? The closer I get either the red or blue tube to the centerline position that the green occupies should mean they should get closer to how much V-KEY that the Green uses, which should be none. The image on the face of the tube is so close to the edges that I have no room to move that there. Deron.

Deron,


"keep the picture centered", well that was the whole point of what I was saying. I you were to have a "perfectly" centered image (if it's possible to get perfect, then your toe-in angle should be perfect as well and that "should" mean that the numbers you're getting are symmetrical negative and positive numbers.


Bruce