[RFI] Spectrum Cable Boxes

Anthony (N2KI) n2ki.ham at gmail.com
Thu Oct 10 19:54:55 EDT 2019

Hello folks,

Anyone on here have experience RF shielding a Spectrum Cable box?  I have
tried all sorts of RF chokes (Material 31 1-300mHz) on the power, HDMI and
coax inputs with very little success.  Pretty much any band wipes out the
cable boxes.  Its not a proximity effect to the antenna as the 80 meter
antenna is at 80 feet and about 50 feet away from the house.  Also, I must
point out that the previous cable boxes did not have these issues.  So I am
fairly confident this is an RF shielding/filtering issue with the boxes.
In speaking with Spectrum, I could not reach anyone in a technical
department that has RFI experience. Next step and test is wrapping the
boxes with aluminum foil, or cutting the cord.

Thanks for any suggestions.


Anthony (N2KI)

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