| vol.2 |
08-21-2026 09:42 AM |
Quote:
Originally Posted by pac.attack76
(Post 3268007)
Those 3 white one moved convergence around. Looks like that's ok but geometry is a mess.
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Geometry looks okay to me for a set like that. You have problems with horizontal convergence on the red, and the image is shifted to the left a little bit.
The tube is probably also a little bit beat. If you turn down the contrast knob, and the lines come together better, then it's more likely that the tube is just old and needs to be over-driven to achieve reasonable brightness. What happens is that the emissive material gets used up on the surface of the electron guns, and/or the phosphors on the inside of the tube start to fade, and then it doesn't get as bright anymore. You can turn up the contrast to make it brighter, but the system is only designed to operate at a certain voltage level. You could think of it in a way somewhat similar to how a home audio amplifier is only designed to amplify sound by the amount of watts it's rated at, except it's video amplifiers in this case. If you push an audio amplifier outside of it's operating range, the sound distorts. The same thing will happen if you push the contrast too high on a TV. Keep in mind that when the TV was new, it would have been much brighter when set at a lower contrast level, and so would not be as distorted. |
