Average lifetime of a CRT?

[dieseljeep]

Originally Posted by mbates14

Wow thats a shame. My zenith has an admiral tube in it.

I really doubt it came from the factory with an Admiral CRT, unless someone pulled the CRT from a scrap set.
IIRC, Admiral sold replacement CRT's of the common types.
I did see some Zenith's come through with RCA CRT's.