How to tell if a CRT is rebuilt?

[Eric H]

There were different grades of rebuilt tubes, on the Grade "A" everything except the envelope was new, new phosphor, new Coating inside and out, new Gun and maybe Aluminizing as an upgrade, essentially a new tube.

Cheaper rebuilts just got a new gun, and new outside coating but the Phosphor was reused, and probably somewhat less efficient, possibly with some minor defects in the screen.

Similar to the difference between Remanufactured and Refurbished.

These days I'm happy to get anything, rebuilt, refurbished, used, as long as it's good!

[n2bew]

Originally Posted by Eric H

Similar to the difference between Remanufactured and Refurbished.

These days I'm happy to get anything, rebuilt, refurbished, used, as long as it's good!

Thanks for all the additional info. I am a newbie to TV's and the background is helpful.
This CRT tested very good on my B&K 466 so I am happy with it. I am in the process of recaping now, after a break to do a radio for my Dad for Christmas. Hopefully I will have pictures posted of the working set in a month or two.
Tom

[rcaman]

And to think that we used to drink soda from rebuilt bottles. lol love that one and very true. steve

[dieseljeep]

Originally Posted by rcaman

And to think that we used to drink soda from rebuilt bottles. lol love that one and very true. steve

The brown glass coating on Milwaukee resistors, was made from recycled beer bottles.
Possibly others did it as well.