CRT decay

From: Russ Blakeman <rhblake_at_bigfoot.com>
Date: Sat Oct 31 18:00:15 1998

Tony Duell wrote:

> > I've got an old CRT that is decaying along the glass edges.
>
> Are you _sure_. Glass is normally pretty stable, and if it was really
> decaying I would have expected the CRT to have imploded. There's about
> 1/2 a ton of force on the screen of even small CRTs.

Metric ton? Just kidding. Anyway I don't think the person means the glass is
actually decaying (awful thick in front and sides anyway) bit probably that
the finish is eroding, getting rough. Probably had a coating that's starting
to crumble or etch.

Sounds like more defined description is due.

Never seen glass decay at all before either and I also have glass (super
thin) in watch glasses of very old watches as well as the faces of old
radios and televisions. Didn't even think about the age of the CRT itself
until you said 50 yrs and had to think that that's only 1948. Man how time
flies. I have an oscilloscope (Navy surplus) that was used int he Korean War
that's around 1951 and the CRT is like new all the way around, but
internally getting a little dim.
Received on Sat Oct 31 1998 - 18:00:15 GMT