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Why does my CRT seem darker.

I have a 6PG with appro 600Hrs on the tubes.


I have a CI 2.0 scaler and the image appears brighter than when using a feed from my computer. The feed from my new CS-1 scaler appears darker.


with the CI scaler.

Contrast-45 brightness-70


with the computer or CS-1

Contrast-57 and brightness-70


These have been calibrated from the same source using Avia


Thanks
 

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I think the o/p from the PC is lower (.7v)

This can be solved by using an interface (extron etc) or by just keeping your PJ settings higher.

I tried using interfaces but found they introduced some minor noise and ringing I have since deceided it is better to go straight from PC to PJ.

It has been stated that having higher settings on PJ is bad for PJ but I believe that the life of phosfur is determined by light o/p and makes no real difference what your settings are if the o/p is the same in terms of brightness and contrast.
 
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