Noise Harvesters - observation & question

[John_H]

It would be useful to quantify the actual noise through data and measurements; the following thread also asks similar questions:

Power Plant and Noise

I’m curious about the noise my P12 injects into the line. The following are typical measurements as taken with an Alpha Labs Line EMI Meter: Wall 350 mV at 121 AC Volts P12 1900 mV 118 AC Volts Topaz Iso-Tran (after P12) 90 mV 121 AC Volts Measurements from P12 front panel: AC Volts In 125 AC Volts Out 120 THD In 1.9% THD Out …