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I've only dealt with two CRTs so far; a Zenith 25GP22 and the weird wide CRT in a Datapoint 2200. The Zenith was the typical green halo and was the first one I did. I tried a heated copper wire but had little luck with it so I went out and got a heat gun. With the CRT wrapped in a heavy blanket I heated the faceplate as evenly as I could until small "fingers" appeared near the edges. Then I gently pried away the safety glass while still waving the heat gun around the faceplate. The PVA material was pretty easy to remove at that point. The Datapoint CRT was more like the RCA type cataract, but being a pretty small tube the heat gun worked here as well. Guess I was lucky both times since nothing went wrong.
At the time I thought about using a Nichrome wire, but didn't know where to find some.
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Erich Loepke
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