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I totally concur about the importance of proper horizontal output operation for the rest of the set....The horizontal drive is what runs the HV and fly and in turn, the flyback derives many crucial voltage points even low-voltage ones such as sound in a solid-state set. Sometimes focus voltage is derived via a divider. One time I was working on a 68 GE color tabletop and the horiz. oscillator tube was bad causing the HOT to overload and preventing HV from coming up. I didn't think to check the osc. and assumed the fly was bad. Once I rang it to test it, I learned this lesson.
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