I have successfully solved the HP2644A "Moldy CRT"
problem. I wanted to report on this because several
people emailed me mentioning that this strange format
(wide) CRT was used in a lot of 70's-early 80's HP
equipment. The only examples I found of this type of
CRT in use on the 'net also have this problem. To
recap, the silicone between the front anti-glare
shield and CRT gets mold creeping in from all sides,
making the CRT ugly and/or hard to read. The very rare
replacments, made with an acrylic shield, cost $225
plus shipping. In a nutshell, I used a nichrome wire,
an old AT power supply, and some homemade handles
along with a mounting box to contain (and I do mean
"contain") the CRT in removing the front glare shield.
After silicone cleanup and removal with a razor blade
scraper and acetone, I reattached the glare shield
(but only at the edges) with optical grade (fish tank)
RTV.
Obviously, this takes some work and nerve to do. I'd
put up instructions on exactly how to do it, but I'm
afraid of liability issues!
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Received on Sun Oct 06 2002 - 17:57:01 BST