Quote:
Originally Posted by old_tv_nut
Caution! A spot killer that works by biasing OFF the CRT has to hold the negative bias until the cathode cools or the high voltage decays, whichever comes first. Read my post about the burn problem on Motorola's first small transistor sets.
Many color sets killed the spot by turning the beam ON fully while the raster had not yet collapsed completely. You would get a short bright flash of a small raster, discharging the high voltage through the CRT before the raster had shrunk to a dot.
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Would that short bright flash put excessive wear on the crt?