Here's the correct way of measuring a Power Plant

[Elk]

This thread may be of interest:

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 …