[Elecraft] PX3 signal artifact - still seeking a solution

Jim Brown jim at audiosystemsgroup.com
Tue Jul 21 19:43:28 EDT 2020


On 7/21/2020 3:03 PM, Grant Youngman wrote:
> If the cable is shielded, and the garbage is on the PC's USB signal lines, an external ferrite won’t do any good.  I don’t know if the cable is shielded or not, but if it is, then the garbage may not be on the shield … and perhaps the USB isolator might be worth a try.  Maybe.  I don’t know anything about that device …

Hi Grant,

See my earlier post in this thread and the reference cited -- the 
problem is that the noise is NOT differential mode (inside the cable), 
it's common mode, and often on the shield, due to its improper 
termination inside the box.

73, Jim K9YC


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