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I'm not sure why some of you seem to think baking out during applying vacuum is such a big deal. It simply means the tube is in an oven during the time the vacuum is drawn. Having the tube in some sort of enclosure at that stage is a good idea anyway because the tube may implode when vacuum is drawn. Equipment with this arrangement is available, if not common.
One of the major difficulty when re-building CRTs is the gradual heating and cooling of the glass when making a glass-to-glass joint. If not done correctly the glass will crack. A crack cannot be "welded" closed, the cracked section has to be cut off, you can only do that a few times before too much of the original neck is cut off. If the crack happens when the glass "button" on the end of the gun is attached the whole gun assembly probably has to be replaced. There are many glass formulas, they react to heating differently. Most CRT are made of a type of glass that is not the easiest to work. If you will notice, Glassslinger uses Pyrex glass. Pyrex does not expand with heating like most other glasses and so it rarely cracks. You cannot directly join Pyrex with CRT glass.
Nick (miniman82) is supposed to retire this year. He will then have time to work on his re-building shop and eventually start rebuilding CRTs.
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