Quote:
Originally Posted by Electronic M
Wow! That is perhaps the most impressive level of craftsmanship I've ever seen go into a TV restoration.
Seeing the before picture it is amazing that there was enough left to make back into a complete TV set (even with all the newly fabricated parts).
I'm also surprised that the original necked CRT didn't have the phosphor blown off; how do you think that would come to be?
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May have been a leaker crt to begin with. On the other hand the shadow mask is not very porous and is probably capable of blocking the inrush of air to some extent in a traumatic event. Also when you crack the neck of the tube, the broken remnant is held in place by the powerful vacuum inside of the tube. IT is not easy to pull the broken piece off until the vacuum has been mostly released. It's like when we use a hot wire to sever the neck in preparation for rebuilding a tube. You can't pull the two neck pieces appart until there is no longer a vacuum inside the tube.
EDIT:
OOOPS, I see this has alredy been answered by Nick.