A very good 36 page article by Garth Powell of Audioquest - "Power Demystified". He answers all the questions we might ask about power and mains-borne interference
Get it here - https://drive.google.com/file/d/1HcJ4lXlMe8Rp8ZbhzG8PbMIcXM1qBLyo/view?usp=sharing
Only 520mb
The first page...
Introduction
The source that supplies nearly all of our electronic components is alternating current (AC) power. For most, it is enough that they can rely
on a service tap from their power utility to supply the voltage and current our audio-video (A/V) components require. In fact, in many parts of the world,
the supplied voltage is quite stable, and if the area is free of catastrophic lightning strikes, there are seemingly no AC power problems at all.
Obviously, there are areas where AC voltage can both sag and surge to levels well out of the optimum range, and others where electrical
storms can potentially damage sensitive electrical equipment. There are many protection devices and AC power technologies that can address those dire circumstances, but too many fail to realize that there is no place on Earth that is supplied adequate AC power for today?s sensitive, high-resolution electronic components.
This is not to say these audio-video components will fail to run from your utility?s supplied power, and, in fact, if you had not been exposed to
anything better, you might even believe they are performing and functioning well. However, with today?s alternating current, we?re relying on
technology that is over 100 years old, intended for incandescent light bulbs and motors. The noise and radio frequency (RF) induced distortion that is present on every AC line?100-127 VAC / 60 Hertz (most of the Americas, Japan, and Taiwan) or 220-250VAC / 50 Hertz (most of the rest of the world)?couple with sensitive circuits in A/V components,
creating both distortion and low-level signal loss. In fact, via digital audio difference file tests and spectrum analysis, it?s possible to measure up
to a third of low level (-70dBu, unweighted or below), signals are lost or altered due to the preponderance of this ever-increasing noise.
In the following charts, you can see from the spectrum analysis, the information you would lose without an Effective AC power strategy
Get it here - https://drive.google.com/file/d/1HcJ4lXlMe8Rp8ZbhzG8PbMIcXM1qBLyo/view?usp=sharing
Only 520mb
The first page...
Introduction
The source that supplies nearly all of our electronic components is alternating current (AC) power. For most, it is enough that they can rely
on a service tap from their power utility to supply the voltage and current our audio-video (A/V) components require. In fact, in many parts of the world,
the supplied voltage is quite stable, and if the area is free of catastrophic lightning strikes, there are seemingly no AC power problems at all.
Obviously, there are areas where AC voltage can both sag and surge to levels well out of the optimum range, and others where electrical
storms can potentially damage sensitive electrical equipment. There are many protection devices and AC power technologies that can address those dire circumstances, but too many fail to realize that there is no place on Earth that is supplied adequate AC power for today?s sensitive, high-resolution electronic components.
This is not to say these audio-video components will fail to run from your utility?s supplied power, and, in fact, if you had not been exposed to
anything better, you might even believe they are performing and functioning well. However, with today?s alternating current, we?re relying on
technology that is over 100 years old, intended for incandescent light bulbs and motors. The noise and radio frequency (RF) induced distortion that is present on every AC line?100-127 VAC / 60 Hertz (most of the Americas, Japan, and Taiwan) or 220-250VAC / 50 Hertz (most of the rest of the world)?couple with sensitive circuits in A/V components,
creating both distortion and low-level signal loss. In fact, via digital audio difference file tests and spectrum analysis, it?s possible to measure up
to a third of low level (-70dBu, unweighted or below), signals are lost or altered due to the preponderance of this ever-increasing noise.
In the following charts, you can see from the spectrum analysis, the information you would lose without an Effective AC power strategy
