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My two Electrohome built TVs (1956 Viking and 1960 Electrohome) have a
section on the power switch that will apply a strong positive bias to the
CRT cathode (from the B+ bus) when in the OFF position. This may have
failed at some point in the past as the Electrohome (which still has its
factory CRT) has a small burn spot in the center of the screen.
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