Historically, the color receiver industry required the tube manufacturer to supply them with current ratios suitable for attaining the white color point 9,300K + 27MPCDs then it was shifted to 6550K. Now the current ratios for both 8200K and 9300K + 27MPCD are supplied to the receiver manufacturer. A number of reasons for these changes are reviewed. This paper presents our new data on the pre-set white color of modern color receivers. We re-visit the area of receiver white color temperatures and compare our receiver data measurements with that of Lisk (1970) and Fiat (1969). The data shows that the trend is to move toward a bluer white than the older 6550K white. More importantly, it was found that the pre-set white color for the group of receivers evaluated varied from about 5,700K to 13,700K with an average white color temperature of 8,000K.
Robert Donofrio, David Hess, William Sember, "The White Color of Television Receivers" in Proc. IS&T 1st Color and Imaging Conf., 1993, pp 185 - 187, https://doi.org/10.2352/CIC.1993.1.1.art00047