[RFI] Switchers ...

[KD7JYK DM09]

: >> What is the best, generic solution for a wall wart or other switcher
: >> that is spewing trash from 500 kHz to 30000 kHz?

Replace it with a twenty-five to fifty cent linear supply from a thrift shop 
of the same specification.  You want noise or silence?  You can drop a few 
tens of bucks over a few weeks to try to make the switching mode supply 
quieter, but, I think the goal is silence, not an exercise in frustration 
while throwing away time and money.

Kurt