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One thing I notice after 39 years of watching NTSC color:
When my parents got our RCA CTC-38 (1969), the color was usually good at one "right" hue (phase) setting, yet it was not very uncommon (especially on videotaped network programming) for the phase to be far off the mark (green or purple faces, blue grass). Sometimes the local station would super a notice "technical difficulties" at the bottom. I understand this was because the NTSC reference signal ("back porch", "color burst") could not be transmitted with the picture on the microwave links then in use by networks (please, someone, tell me WHY this was so, if they can send a chartreuse dress image on the link, they can send the burst, can't they ?).
By about 1980, these "off-phase" events became very rare, so an NTSC-country TV viewer can set the "TINT" function just once and leave it alone. (this is now usually an item on the on-screen-display, like the "BRIGHT" or "CONTRAST" functions I assume are on the OSD menus of PAL and SECAM sets as well as NTSC)
I can only think of three reasons I adjust the hue. (1) one of my VCRs has it's own phase, red shows a little orange if I do not adjust it back to red. (2) one low-power station, on a near-zero budget (same as the old VCR). (3) My daughter is quite amused when I change Bob the Tomato into a giant grape!
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