My little small minded friend, I am into amateur radio (which only means I don't make money using radio) and if you are having RF problems, ferrite core will help. Someday you should do a thing called reading, but not writings of people who are trying to take your money for BS. Writing done by people long died and so have nothing to gain. Ferrite Cores or not snake oil, they remove RF and if that is the problem you are having it should go away. Didn't you say that there was a Radio Station that was close to you or not. When I would get on 20 meters (14 plus MHz) my computer would have problems with the keyboard and act up, so I put the cord thru a Ferrite Core and problem ended, the computer unlike you is not subjective. So now you have some real information, use it or not, I don’t have the problem and I have no stock in Ferrite Cores.
Paul
And the cost is not high, or is that how you rate a produce.........