I have done this to old CRT's before and din't mess with replacing the lens. I used rubber spacers to make up the 1/2" difference when re installing tube. The contrast and sharpnes is much better than with the lens.
I had a nice old zenith with a CRT that was good as new. The front got a hit and resulted like what you see when a car windshield gets hit by a big stone. Of course the shield broke while heating it but it made it a lot easier to remove without getting the tube too hot. I am surprised at how well the sharpness and contrast was. The front shield kind of softens the picture. I figured I would be safe since the shields are not used on the newer CRT's. This is a very interesting topic though.
Thank you for the informative videos,as i have several roundies, and rectangulars that have cateracts, but other wise in great shape. By the way,i enjoyed viewing your collection,on Picturetrail.
This is very interesting, I never realized this can be done. My question is though, how do you manage to use the razor blade without scratching the glass surface?
bravo :)
sparkyrocky12131963 5 months ago
thanks so much for these video! I used this technique to fix an old computer!
commanderhix 7 months ago
wont a razor blade scratch the tube?
JDTV1995 1 year ago
Uh, what would happen if that thing decided to implode...
AFreakinProblem 1 year ago
So now you have removed the implosion protection. How do you safegaurd againt implosions ??
Shouldnt you put a covering back as a safety measure - ever seen a CRT implode ?
ekcopyephilips 1 year ago 2
I have done this to old CRT's before and din't mess with replacing the lens. I used rubber spacers to make up the 1/2" difference when re installing tube. The contrast and sharpnes is much better than with the lens.
Perry7360 2 years ago
true that. but the lens also acts as a type of shield too. not a durable one though...
hellsmaw84 2 years ago
I had a nice old zenith with a CRT that was good as new. The front got a hit and resulted like what you see when a car windshield gets hit by a big stone. Of course the shield broke while heating it but it made it a lot easier to remove without getting the tube too hot. I am surprised at how well the sharpness and contrast was. The front shield kind of softens the picture. I figured I would be safe since the shields are not used on the newer CRT's. This is a very interesting topic though.
Perry7360 2 years ago
indeed. but it is good to protect the tube as much as possible. it sucks when the tube gets deep scratches and cant be fixed by normal means.
hellsmaw84 2 years ago
Thank you for the informative videos,as i have several roundies, and rectangulars that have cateracts, but other wise in great shape. By the way,i enjoyed viewing your collection,on Picturetrail.
rcactc24 2 years ago
what would the image look like without tha lens?
fmackert2 3 years ago
crisper and brighter.
hellsmaw84 2 years ago
Nice video, and is that lense new, and where did you get it?
ArcadeGames 3 years ago
it's the old lens.. just cleaned ;)
Knaeckebrotsaege 3 years ago
This is very interesting, I never realized this can be done. My question is though, how do you manage to use the razor blade without scratching the glass surface?
musicman0150 3 years ago
The PVA around the cataract edges looks pasty.
craig1974 3 years ago