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I don't understand why/how better DC restoration would increase HV beam current in bright scenes. Better DC restoration should only improve the darkness of dark scenes, not affect bright/high-contrast scenes. You would adjust the raster for maximum desired contrast or highlights within the ability of the HV power supply, the same as on any color CRT display, good DC restoration or not. Maybe, the improved black levels would increase the current through the HV regulator tube. Would that possibly exceed the ratings of a 6BK4 tube? If so, could that problem be solved with a pair of them, or is there a heavier-duty substitute available? Did the 21CT55 and/or CTC4 "eat up" 6BK4s, if those sets had good DC restoration?
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Chris
Quote from another forum: "(Antique TV collecting) always seemed to me to be a fringe hobby that only weirdos did."
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04-07-2010, 08:52 PM
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