Example of poor TK-41 performance
 

Bell Telephone Hour, Season 6 Episode 21, from studio 8H (?), Rockefeller Center.

Poor registration and corner focus abounds. I wonder how old the cameras were at the time, how many hours the tubes had on them, etc. The cameras at the New York Word's Fair that year were doing much better, at least some of the time.

https://www.youtube.com/watch?v=JZ2diDZf5nM