All Snap On Split Beads

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Often it is difficult to slip beads on a cable because of a plug or connector. Split beads solve this problem. They come in two halves that fit over the cable. A plastic snap cover holds the two halves together and holds the assembly on the cable.

For RFI use, mix 31 is effective from 1-300 MHz, mix 43 works from 25-300 MHz, Mix 61 is for 200-2000 MHz, and mix 75 favors .15-10 MHz. These frequencies are those of the interfering signal to be eliminated, not the operating frequencies of the equipment to be protected.

Not sure of what sizes you need or solving a RFI problem with devices using multiple size cables? Try the Ferrite Snap On Combo Pack which has sizes from 1/4″ to 3/4″ with either Mix 31 (1-300 MHz) or Mix 61 (200-2000 MHz) or Mix 75 (100 KHz – 10 MHz).

SNAP ON Sizes for Heliax and Coax Cable

Shown below in the table are the SLIP ON and SNAP ON products for various popular Heliax and Coax cables. These are the correct size for making sleeve chokes – See above table for technical details.

SNAP per Coax - AM Broadcast RFI Kits

FSB Mix 31 - RFI Range: 1-300 MHz

FSB Mix 43 - RFI Range: 20-300 MHz

FSB Mix 61 - RFI Range: 200-2000 MHz

FSB Mix 75 - RFI Range: 150 Khz-10 MHz

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Ferrite Flat Cable RFI/Noise Filter, 1.35" wide slot RFI Range 10-500 MHz, 1 Piece

SKU FSB43-1.35-1

$5.95

On Sale

Ferrite Mini Snap On Combo Pack, Mix 31, RFI Range 1-300 MHz - 10 filters (3/8, 1/2, 3/4)

SKU FMSCP-31-10

List price ~~$55.95~~

Save 11%

$49.95

On Sale

Ferrite Mini Snap On Combo Pack, Mix 61, RFI Range 200-2000 MHz - 6 filters

SKU FMSCP-61-6

List price ~~$55.00~~

Save 9%

$49.95

On Sale

Ferrite Mini Snap On Combo Pack, Mix 75, RFI Range 150 KHz-10 MHz - 6 filters

SKU FMSCP-75-6

List price ~~$85.00~~

Save 6%

$79.95

Ferrite Snap On Sampler Pack, Mix 31, RFI Range 1-300 MHz - 10 filters (1/4, 1/2, 3/4, 1)

SKU FSOSP-31-10

$59.95

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 1024x648 - AM Broadcast RFI Kits

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).