Ac power bick wall filter?

How can i "eliminate" any frequency above say 70 cps from my power supply to stereo?

ptss03-02-2021 6:32pm

ptss OP Details Discussions Posts This discussion Message User 1,959 posts 03-02-2021 at 06:33pm Copy Comment URL Report Comment Edit Delete Our power should be 60 cps at 120 volts and I want to provide that. Thanks
erik_squires Details Discussions Posts This discussion Message User 15,662 posts 03-02-2021 at 06:39pm Copy Comment URL Report Comment Edit Delete The only way to be even 99% sure of this is to use a power regenerator. See PS Audio. The next level below is an inductive low pass filter. See ZeroSurge/Brickwall AC filters.
cleeds Details Discussions Posts This discussion Message User 5,645 posts 03-02-2021 at 06:41pm Copy Comment URL Report Comment Edit Delete In the U.S., utilities regulate line frequency within a very tight tolerance - it's necessary to keep the electrical grid stable. Voltage is maintained to a much looser tolerance.
erik_squires Details Discussions Posts This discussion Message User 15,662 posts 03-02-2021 at 07:33pm Copy Comment URL Report Comment Edit Delete @cleeds is absolutely correct. The power generation Hertz (cycles per second) is very tightly controlled. It used to be that electric clocks were among the most accurate, given by law a day had to have a precise number of cycles. No longer the case I believe. Still, cleeds is right BUT, eliminating anything not 60 Hertz is a good goal in eliminating noise and distortion that may appear long after the power company generates it.