Quote:
Originally Posted by AlanInSitges
As soon as I saw who posted this I knew it would be an interesting read, and it was. ^
It will also be interesting to see how far you get with the 11SP22...I'm not sure they can even resolve differences in focus.
Where are yo located?
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Your encouragement is always appreciated. I find that by pushing the boundaries of tech, I learn more... I break more things too because often historical boundaries in technology exist for good reason. However, sometimes the boundaries have no good reason for existing, and I find that people just copy what they see others doing, without ever understanding why. Modifying 1990s TVs to use a lower G1 voltage was "successful" in that a greater sharpness was achieved than with using the focus pot alone. Those pictures above are 240p content, where every other line of video should be not be illuminated. If the blank lines of video are not clear in 240p content, then in 480i content, adjacent lines of video will overlap, i.e., the vertical resolution is lower than it should be. I found that I could make the cathode ray much thinner and sharper than in those screenshots, but the moire effect became very visible. Some research I read stated that the "spot size", which is the smallest region of phosphor illuminated by the cathode ray, should be at least 1.5 times the dot pitch of the phosphor mask, otherwise moire effect becomes visible. Since many TVs use a spot size that is 2 to 2.5 times the dot pitch of the phosphor mask, an improvement in sharpness is possible, without suffering from moire effect.
I live in the San Francisco, California area. This area has a culture of modernity and "high tech". People upgrade their televisions very frequently here. Even late 1990s CRT TVs are becoming rare here. Non-solid state TVs are extinct in the wild here. I have to drive far to rural areas of California, where people are more slow to upgrade their TV to a newer model.