A VK6 member found this very useful reference on noise suppression.  Full acknowledgements to G8JNJ.

Whilst this document has been written from a UK perspective, it is very useful for:

  • noise suppression in consumer appliances & switch mode power supplies
  • reducing noise in the shack
  • using ferrite rings to suppress noise
  • understanding RFI

G8JNJ Notes

An example using ferrite rings to suppress noise from this power supply

Keywords: ADSL routers, PC Noise, Using Ferrite rings, Filters, switch mode power supplies