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RE: Incoming AC legs NOT created equal...

Posted by jea48 (A) on June 2, 2017 at 06:06:14

In Reply to: RE: Incoming AC legs NOT created equal... posted by Rick B on June 1, 2017 at 09:40:28:

An oscilloscope can be handy for noise detection, but a spectrum analyzer is even more so as it will not only show that there is noise, but what frequency, amplitude, etc.

I used the Audio Prism version of the Entech box many years ago to find out that it was my Adcom GFA555II that was dumping a boatload of noise back into my AC line...I ran that amp through a Corcom 20A filter in a box after that and it sure depleted the amp's noise pollution.



Rick,

What do you think you would have found if the Adcom GFA555II was on a different circuit than the other audio equipment of your audio system? Would you have seen the noise at the receptacle/branch circuits of the other audio equipment? My guess is maybe but to a much lesser lower degree.

I believe that is the main reasoning behind installing multiple dedicated branch circuits to feed an audio system. To decouple the power supplies of the equipment from being directly coupled from one another if fed from only one branch circuit.

Aftermarket power cords can help do the same thing sometimes, to some degree, if the power cord doesn't get in the way of the SQ of the piece of equipment the power cord is used on.

Your thoughts?

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