It would be interesting to see what the dc signal coming out of all power supplies looks like. Frankly, I am shocked by the impact of power cords. When I still had an oscilloscope, I could see many deviations from a 60 sinusoidal wave.
Now there is much more EMI and RFI in our environment. So expensive well conceived power cords are just part of our price to pay for cell phones, WiFi, and cheap power companies modulating communications on our power cables.
Now there is much more EMI and RFI in our environment. So expensive well conceived power cords are just part of our price to pay for cell phones, WiFi, and cheap power companies modulating communications on our power cables.

