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I've added another file to "Diode Commutation EMI" folder.

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"Shortwave Hum" is a real world explanation of how bypassing diodes can reduce SW Hum and intermodulation,

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I copied the web page at http://www.ll-leasing.com/pritch/shortwav.htm to a PDF "Shortwave Hum."

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I could quibble at some of the non technical, not quite accurate, information, but the webpage is a practical 'how to' based on the author's personal experience with linear wall warts.

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If you have a switchmode power supply wall wart, you are doomed.

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