100° Picture Tubes

[nasadowsk]

In general, sets from the 40's will be 70 or less, then by the 50's they were 90, then by the late 50's 100 and up, for B&W sets. A 21 inch 70 degree tube is a big thing, a 21 inch 110 degree tube's a heck of a lot smaller.

It was better sweep circuits (and I suspect better magnetics) that allowed them to get the angle up.

Color lagged because of pin cushion issues, but B&W sets even in the early 50's had geometry correcting magnets on the neck...IIRC there was some yoke magic, too...