From: rgsros@notme.invalid   
      
   Hello,   
      
   Regarding those Ferrite EMI Suppression "tubes" that are placed over   
   signal wires to reduce noise, might someone please offer a bit on how   
   used, and how effective they are ?   
      
   I have a small SDR radio Dongle that is connected to my PC via a USB cable.   
      
   There appears to be a fair amount of noise being picked up on the radio   
   that is being radiated/induced from the PC, I believe.   
      
   e.g., should they be placed over both ends of the USB cable, at both the   
   PC and at the radio Dongle ends ?  Or, only at one end ?  Why ?   
      
   I'll experiment, of course, but would like to hear your opinions on first.   
      
   Any thoughts on this would be most appreciated.   
      
   Thanks,   
   Bob   
      
      
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