How to remove crt picture tube green yellow ring halo cataract from a zenith style picture tube crt.
First, let me stress safety. Cover yourself and ware a face shield.
This is a mod on Doug's How to repair CRT cataracts RCA removal how to. Watch these videos first. http://www.youtube.com/user/drh4683#p/u/78/5l1EoMmmOcQ
The Zenith style is a soft glue, almost like wet silicone.
This is the Zenith style crt with green halo.
First remove the tape.
Pile of removed tape.
Just as in the video, I warmed the lens up a bit to soften the glue.
This is what I'm using as a hot wire to cut though the glue. I got a 5 pack of these guitar strings for $6.
You could use an old filament transformer for this. Something fairly high current. I'm not sure what this transformer is out of but the secondary output is about 10volts at 20 amps. I'm using my variac to regulate the output so the guitar string doesn't just turn red and burn.
Size the guitar string up to be just about an inch longer than the small width of the crt face. Screw it down to to blocks of wood wrapping the string around the screws. It has to be fastened to the wood well.
Turn the vairac up to where the wire gets good and hot but not to the point it weakens. This takes some experimenting. Start at the corner working through the glue.
Work your way through....
Keep going....pulling back and forth a little....
Getting there. This really went very fast. Less than a minute to cut the safety lens loose.
Lift lens off.
From here follow the cleaning and re installation steps in Doug's (drh4683) Videos.
Clean crt face and lens well and apply double stick tape around edge between glass and screen.
This was much easier than I thought. When the lens and wire are warm the wire cuts right through the glue with ease.