Taming Tribbles?

[Les Habitants]

1 hour ago, sandyk said:

Earthing the 0 volts/case of the powered device may improve the SQ from these devices, or reduce their degrading effect on other devices.

There is a thread devoted to this in the Uptone Forum area with E.E. John Swenson offering some very helpful advice and explanations.

 

+1 on this, I've found this JSGT shunt to be effective in systems where SMPS wall warts are a necessary evil.

In Ham Radio circles there is a solution for attenuating so-called SMPS "backwash", by Array Solutions.

Their AC-7 filter is designed to allow SMPS use in the very noise sensitive/critical long distance radio receiver environment without destroying the reception.