[RFI] Adding a shield to the utility service lines?
Jim Brown
jim at audiosystemsgroup.com
Thu Dec 5 00:45:38 EST 2013
On 12/4/2013 9:33 PM, Aaron Kreider wrote:
> Another crazy option
Yes, it is. Shielding addresses differential mode RFI, and most trash
on power lines is a common mode signal and radiates just like any other
antenna. Although I tried a bunch of big clamp-ons on a twisted triad
power feed back in Chicago, it was long before I understood how ferrite
chokes work, and I'm now nearly convinced that it was a bad idea because
a string of beads is inductive.
Even if you could shield that line (it belongs to the power company, so
it's not a good idea), the common mode current would flow on that
shield, and you would still need to choke it to prevent it from radiating.
73, Jim K9YC
More information about the RFI
mailing list