Those are good cores indeed. You might try just stacking a second #31 core
next to the existing one.
73, Mike
www.w0btu.com
On Thu, Dec 5, 2013 at 12:08 PM, Don Kirk <wd8dsb@gmail.com> wrote:
> Yesterday my first attempt at eliminating the RFI turned out to be very
> rewarding. I constructed a simple power cord RF choke for the TV using 14
> turns of a power cord on a 2.4" OD Fair-Rite #31 mix toroid core (based on
> the K9YC hams guide to RFI document). The RFI at the neighbors house is
> considerably reduced using the choke on the TV power cord, and the RFI at
> my house appears nearly if not entirely gone. I will try adding another
> choke in line with the first choke to see if additional reduction of RFI at
> my neighbors home can be achieved...
>
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