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OK--so they can't bake the CRTs.
But my question would be, why can't they seal the glass-metal junction first. Then evacuate at room temperature, then flush with an inert gas to force out the remaining itsy-bitsy left-over air molecules, then seal the stem? Seems there should be some really inert material, that when used, and a few molecules remain inside the CRT, would not affect anything.
Or, how about putting in some chemical that super-absorbs oxygen. Evacuate until most oxygen is gone, then activate the chemical.
Maybe someone will take one up on the space shuttle, and open the neck on a space walk--look mom, no heat required--although those pesky micro-asteroids could do damage.
Damn, if they don't have anything handy, they could visit Roswell and get something to fit the bill. Those aliens must have had color TV in the 1930s!
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