Did you know CBS made tubes?

I didn’t either till I saw this old ad with Gary Moore. The tube business was probably a part of the TV set maker, Hytron that CBS bought in 1951 to make ‘Air King’ home receiver sets compatible with it’s Field Sequential color system. Interestingly most of those home sets that were sold were bought back and destroyed after the FCC went with RCA’s Dot Sequential color system.

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