24-05-2020, 07:30 AM
Any item that loads one side of the mains cycle more than the other can affect the RMS value of the mains, specifically the DC offset as the mains has a non-zero impedance.
The issue is that DC on the mains can drive a transformer core into saturation and toroids are more susceptible as, unlike EI cores, they have no air gap.
Rod Elliot, who wrote that article, is a good and thoughtful engineer - highly regarded for his totally non-audio-phoolery approach.
For many audio people, this is a non-issue - I've certainly never seen the need for a DC blocker, but there again, I have an unusual power setup.
The issue is that DC on the mains can drive a transformer core into saturation and toroids are more susceptible as, unlike EI cores, they have no air gap.
Rod Elliot, who wrote that article, is a good and thoughtful engineer - highly regarded for his totally non-audio-phoolery approach.
For many audio people, this is a non-issue - I've certainly never seen the need for a DC blocker, but there again, I have an unusual power setup.
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