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TVs then vs TVs now
(sopuli.xyz)
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this post was submitted on 27 Nov 2023
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Would it, though? I'm skeptical.
If it did, it wouldn't be because they have "pixels," though; it would be because overdriving the deflection yoke with higher-frequency signals would generate too much heat for the TV to handle.
Otherwise (if it didn't overheat), it should "work." The result might look weird if the modulation of the signal didn't line up with the apertures in the shadow mask right, but I don't see any reason why sweeping the beam across faster would damage the phosphors. (Also, I'm not convinced a black & white TV would have any problem at all.)
It will tend to turn the beam on when it's off to the side, outside the normal range of the screen. X Windows users in the mid 90s had to put in their exact scanline information or else the screen could blow up. That went away with a combination of multiscan monitors and monitors being able to communicate their preferred settings, but those came pretty late in the CRT era.
Edit: in any case, color screens need to have at least bands of red/green/blue phosphor. At a minimum, there will be breaks along either the horizontal or vertical lines, if not both.
When you say "blow up" do you mean the tube would literally explode, it would burn through phosphors, a circuit board would let the magic smoke out, or something else?
I remember configuring mode lines in X. Luckily, I never found out the hard way what happened if you got it wrong.
Literally blow up the tube in the worst cases.
Interesting, TIL!