Quote:
Originally Posted by Captainclock
Hmm, well when I adjust the brightness and contrast controls the screen does some funky stuff like making light tones like light colored skin and what not look almost greyish-black instead of white colored (and dark colored skin and other darker tones look whiteish colored almost like its inverting the greytones), is that a sign that the picture tube is about shot?
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Yes... CRT engineers refer to that phenomenon as "double peaking"... the beam current does not increase in a linear fashion as grid drive is increased, but may actually decrease and then increase again as grid drive is advanced farther, creating a second brightness peak. Very common on a worn out CRT.
jr
02-15-2016, 03:41 PM
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