CRT (cathode-ray tube) projection TVs use the same technology as traditional TVs, but with a projector to magnify the image and achieve larger pictures with the same tubes.

CRTs offer very clear pictures, last a long time and are the best value among rear projection TVs. However, they are also thicker and heavier, and are gradually being phased out in favor of more up-to-date digital technologies that are better suited to high-definition, gaming and PC use.

So when you see an ad for a cheap projection TV, make sure you know what kind of picture technology it has -- the best deal may not be the best picture..

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