Why did others drop out of early color manufacturing?

[frenchy]

Originally Posted by John Folsom

Zenith did make a small number of 15" color sets in later 1953 and early 1954.

Now THAT is one cool looking color tv set!

On the proposition of a 'porthole' color set, I used to wonder if that would have even been possible... did the tubes require that the top and bottom areas be reserved for supporting structures or mounts for the mask? Heh, like converging those suckers wasn't hard enough back then, let's throw in the top and bottom edges! 8: )