AM Broadcast RFI Kit, AC/DC/Audio/Control, RFI Range: .5-5 MHz

RFI-AM

We have put together a generic kit of 5 large 2.4″ ferrite rings for AC/DC line cords and 8 easy-to-use snap on beads (1/2″ hole) specifically chosen to be effective for the most common devices effected by AM Broadcast RFI.

Complete with instruction manual with installation pictures. If you can screw in a light bulb and follow instructions, you should have no problem installing the chokes on your effected equipment.

$99.5 In stock

Filter Power Rating (PEP watts):n/a

RFI Suppression Range (MHz):.3-3 MHz

AM Broadcast RFI Kit, AC/DC/Audio/Control, RFI Range: .5-5 MHz

When considering solutions for AM broadcast (550 Khz – 1.8 Mhz) you should consider Mix 77 ferrites available in a variety of shapes and sizes. Choose a size to give the maximum number of turns of the affected wire or cable.

AM broadcast transmits on a low frequency with large antennas. Consequently it takes a large antenna to receive the signals. Typical “antennas” are AC house wiring, phone lines, long satellite or cable TV cables, DSL/CAT5 lines running between rooms, etc. The device wires that connect to these “antennas” need to be choked with as many turns through the ferrite as possible. Some installation examples are shown below on this page.

For AC/ DC power cords and coax cables the F240-77 (2.4″ OD, 1.4″ ID) “Donut” toroid is the most popular. Also available are smaller toroid donuts and Mix 77 beads. Shown below is a graph with 8, 10, and 12 turns through the toroid – obviously more turns has higher choking impedance. Mix 77 toroid products are HERE and Mix 77 small beads (for small wires) are HERE

F240-77 Turns Comparison from .1 – 8.1 Mhz

Shown below is a graph of frequency response verses choking magnitude for a F240-77 in the AM Broadcast band for a 12 turn coil around the toroid. (Same info as above but different frequency range).