Quote:
Originally Posted by Electronic M
Most American CRTs where there were equivalent glass and metal types the bell of the glass tube was shifted back 1-3" compared to the metal.
The metal tube would place the screen right at the edge of the flare, but the glass would place the screen 1-3" out from that and leave a flat side around the screen where a mounting strap could be placed...
Despite many metal glass pairs having basically the same socket to screen dimension, the rear shifted bell meant a shorter neck and repositioning of the yoke...If you've ever converted an American metal CRT set to a glass CRT you probably will have had some fun mounting hardware modifications to do.
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I was surprised enough to pull the replacement all-glass picture tube out of a television, in order to compare it with the original metal-glass one:
I remember that I hadn't faced any difficulties with replacement a few years ago. I only had to rework the HV supply gear, and change the socket. The cone of the glass tube is just more plumpy but its height is the same, so it fits the original hardware pretty well:
Maybe, the difference is in that my glass CRT is the official replacement for the metal-glass one. What was about American glass CRTs? Were some of them designed as the direct substitutes for obsolete metal tubes, or were they all just newer tubes which had to be used as replacements?
Crist Rigott, you're making good progress on the restoration! Hope to see a picture on the screen soon!