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A comment on Continued G4 (Severe) Geomagnetic Storming Observed. Parent comment

Re:Continued G4 (Severe) Geomagnetic Storming Observed by bsder on Friday September 08, 2017 @05:22PM (#15204068)
High-voltage DC is becoming more popular, not less.

The technical advance has been the efficiency of high-voltage semiconductors.

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