Quote:
Originally Posted by YamahaFreak
Is a tensioned-grille shadow mask the same thing as an aperture grille?
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Yes. Regular shadow masks (either triad or in-line) are self supporting, but the aperture grill is made of vertical strips that are under tension. If overheated (by a intense bright white area), the shadow mask "domes" and can lose purity. The aperture grill, because it's under tension to hold the elements straight, doesn't distort until it is really overheated and starts to sag.
By the way, Trinitron grills typically have three very fine horizontal wires across the screen at about 1/4 height, middle, and 3/4 height, to keep the grille from vibrating. Once someone sees these, they may focus on them and find them annoying. If you haven't noticed them, don't try looking unless you want to notice them every time.