Question Ferrite Bead

Jun 14, 2021
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Hi folks, thank you for accepting me. I am trying to help my son but, as I am an older person, I am lousy with modern techy stuff. I ordered him a replacement adapter for his dab radio. The new lead does not have the little plastic cylinder which i assume is a Ferrite Bead (I googled it!!). The new adapter works, except that there is a sort of screeching/interference sound on the radio. When I replaced the adapter with the original one (which is held together with insulating tape!!!) it is fine. Can I do something to stop the interference or do I have to buy the correct adapter? Many thanks in advance.
 

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