after several removals of a safety lens (mostly roundie and one rectangle) I finally had one implode (23v rectangle) it was violent to say the least, I was not injured (well one small cut on arm) but it renewed my respect. It was one that I was having problems getting the lens off (it cracked, I did not use a heat gun, the implosion took place early in the morning as I was just checking on it to figure out a way to did out some of the plastic so I could do the wedges over again. Anyway, I think it would be wise (if you want to remove the lens on the bonded type) to install a tension band before starting.

That being said does anyone know anything about banding? type of band, equipment used, how to determine correct tightness?

I am not looking to start a rant about danger of CRT's I know that, just looking for expertise on banding technique.

I should have put this in rectangle tv, so mods please feel free to put in the correct forum.

I know that when I used to go to Dunbar CRT Rebuilders in Los Angeles in the 80s, for "while-I-wait" bonded glass removal, they would remove the glass first with a hot wire between two handles, and then use a banding gun to apply the band. It was an air-operated gun; similar to the ones used in palatizing of machinery for shipping. I happen to remember the name "Signode" on the gun. I don't think it was anything special for CRT banding, but I don't know that for sure.

I'm glad you didn't get hurt (seriously), and I'd say you had an anomaly implosion. Once in a rare while, I used to hear about TVs imploding in the middle of the night in unattended rooms (no people, pets, earthquakes, nor objects that could have struck the tube). Your tube probably had a weak spot in the glass, which was protected from uneven pressure all those years by the safety glass. Once exposed to air, it failed.

Charles

wonder if Hawkeye had this equipment, I presume he did, so maybe ETM has now?

i had this happen to me years ago. talk about a hell of a blast and glass every where room full of dust. one tiny scratch on my nose. happened in a split second. steve

yea it was a blink of an eye then one moment boom gone, yikes....I was lucking only a scratch really, and there were some pretty good size chunks laying around several feet. I am glad it happened on a work day when most of the neighbors were not around the hear it, prob would have brought da man out to see whats up...

I came DAMN close to that when in a heat induced daze I set a HOT CRT, after botching the sun decat method on and giving up chipping the safety glass off of, into a vat of COLD water. I realized how bad it was as I set it in, and ran away(should have tried to save it but was too chicken). Thing didn't implode, but did crack(it was a ping noise) and gurgle.

[QUOTE=kx250rider;3069028]I know that when I used to go to Dunbar CRT Rebuilders in Los Angeles in the 80s, for "while-I-wait" bonded glass removal, they would remove the glass first with a hot wire between two handles, and then use a banding gun to apply the band. It was an air-operated gun; similar to the ones used in palatizing of machinery for shipping. I happen to remember the name "Signode" on the gun. I don't think it was anything special for CRT banding, but I don't know that for sure.
If you look at factory banded CRT's, you'll see that there is some kind of epoxy used with the banding. I don't think, just the banding would have been sufficient for implosion protection.

...

When I remove a safety glass, I cover the back of the CRT with some heavy moving blankets just in case. I also wear gloves, and a full face shield.

And I wear motocross gear; kevlar shirt, helmet & goggles, and neck roll when I fool around with bonded safety glass jobs. I've only done a couple of them, as it's not my favorite part of the hobby :no:

Charles