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Originally Posted by julianburke
By the way-one more important thing: DON'T EVER *REPEAT* DON'T EVER REMOVE A PRESSURE BAND ON A LIVE TUBE!!! It will implode. I saw a dumbass TV repairman do this to make it fit into a set one time and he found out the hard way!
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Thank you for the fascinating details of CRT rebuilding. I used to pick up rebuilt CRTs for my company from a place on the South Side of Chicago in the early 1980's, and I wish now that I had kept up more with that business. I did see the whole shop area, and I remember the rebuilding machine was always dripping with water inside or outside it or something like that. The phone he had was still a hard-wired rotary phone from the late 1940's, the oldest I ever saw in service anywhere.
I should mention, though, that at least one type of 23" B&W CRT can have its band removed safely-in fact, you have to do so because new CRTs (National brand) in the early 1990's came without the band. We may have one or two still in the box here that I have not used yet. The band has a hex-head bolt and nut assembly that is loosened to remove the tube. I have always been a bit nervous when changing them, though, because I wondered if the band "held together" a CRT, and you just confirmed that.