1. 

   Zer0ink Regular member

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   Does anyone know the difference between a plan usb cable and one that passes through a plastic(dont know what to call it) knob?
   
   What is that knob called and what does it do?
   
   Are there different knobs for different functions or are they all the same?

    

   Zer0ink, Jan 16, 2008

   #1
2. 

   attar Senior member

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   It's probably a ferrite choke.
   
   http://www.dataq.com/products/hardware/accessories/fc.htm

    

   attar, Jan 18, 2008

   #2

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