I am looking into fitting ferrites to my SMPS power supplies output leads (wall warts.)
I have been getting some strange noises on my valve stereo amplifier since using a couple of LV DC PSUs as above. One for Bluetooth and another for a Cambridge audio D.A.C.
Is it a case of just fitting the clip-on cylindrical variety or taking a given number of turns thru each device?
I have tried a single pass but this seems to give no obvious improvement. Also will a number of (effectively) ampere turns affect the SMPS loading?
If I remove the SMPS supplies all is well so am sure the high frequency noise is due to these (nssty) SMPS devices. If this is the case I will have to invest in a proper linear PSU.