Quote:
Originally Posted by nasadowsk
Ok, shouldn't a higher HV be less of a burden to the flyback because he shunt regulator's not holding it down as much?
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The HV regulator works by sampling the total current in the HV suppply, and keeping that current constant. Based on the equivalent resistance of the HV supply, setting a particular total current will set a particular voltage. So far, you have it right - a higher voltage means there is less (constant) current draw.
1) if you go too far towards low current and higher voltage, you will run out of range and out of regulation on bright pictures sooner. This is more of an issue with sets that have full DC coupling (which no early roundies had).
2) running insulation beyond its rated voltage is asking for leakage and eventual breakdown
So, higher voltage setting is probably easier on the horizontal output tube, but harder on the flyback.
My opinion is to follow the specified setting, unless you are willing to gamble.