Why Did NBC Use Trinitrons?

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It's ironic because the Trinitron is basically an improved, modified Chromatron. Most of the original 1951 ideas from the original Chromatron were incorporated into the Trinitron.

It's ironic because the Chromatron was one of the competing systems along with CBS and RCA for selection by the FCC. RCA won, but 14 years later the Trinitron went to market and dominated as the best selling color television until flat screens took over.