Understanding How Ferrites Can Prevent and Eliminate RF ...
necting the mic to the input gear was wound around a toroidal ferrite (Fig 1) to form an RF choke that reduces that current. Fig 1 – A toroidal ferrite choke Fig 2 – Ferrites are made in many forms To test the effectiveness of ferrite chokes in audio RFI applications, selected product sam-ples were ordered, and a series of tests were run.