Ferrite Ring Combo Pack

The Ferrite Ring Combo Pack is a convenient solution for troubleshooting RFI/EMI from unknown frequencies or multiple frequencies that require multiple  suppression mixes.  Included in this combo pack are ten 2.4″ OD/1.4″ ID ring toroids as follows:

Mix 75 effective from .15-10 MHz including AM Broadcast band – quantity: 3

Mix 31 effective from 1-300 MHz for general purpose – quantity: 4

Mix  61 effective from 200-2000 MHz for cell phone, WIFI, HDTV,  Cable TV interference – quantity: 3

Snap On RF Choke - 1/2"/12.7mm cable -5/10/15 Bead Option, 100 KHz - 5 MHz, Excellent in AM Broadcast Band

SKU SNO75-1/2-5
$64.75
Bulk pricing available for quantities of 2 units or more
Select # of beads
1
Buy more, save more
QuantityPrice per itemDiscount
2 items$57.4511% off
20 items$49.9523% off
Save this product for later
Customer reviews
Reviews only from verified customers
No reviews yet. You can buy this product and be the first to leave a review.
Share this product with your friends
Snap On RF Choke - 1/2"/12.7mm cable -5/10/15 Bead Option, 100 KHz - 5 MHz, Excellent in AM Broadcast Band
Product Details
Brand: Palomar Engineers
MPN: SNO75-1/2-5, -10, -15
Country/Region of Manufacture: United States
Effective Frequency Range (MHz): 100 KHz - 30 Mhz
PEP Power Rating (watts): same as coax cable rating
Common Mode Attenuation (db): see graph
Estimated Insertion Loss (db): .025

Use for 1/2″ Cable – RG8, RG213, LMR-400, AC/DC and signal cable for suppression of common mode current (RFI) from 100 KHz to 30 MHz

Typical common mode suppression up to 22 dB depending upon the number of beads and frequency. Quite often 20 dB is considered the minimum effective reduction.

A minimum impedance of 500 ohms is needed for 50 ohm cable or 10 times the cable impedance for other cables to make a measurable difference in common mode current suppression.

The beads clamp to the cable and may be operated as is for indoor use. However, it is strongly suggested that they be covered to protect the plastic covers from weathering – use electrical tape for best results or heat shrink to ensure longer life. All kits come with instruction manual which covers assembly and application tips.

As you can see from the impedance vs frequency graph, you can very effectively increase the choking impedance by increasing the number of beads on the cable.

Snap On and Slip on Feed line chokes available in sizes to fix cables with outside diameters of 1/4", 3/8", 1/2", 3/4", 1" - check website for other size options.

Tech note: For RFI frequencies over 3.75 MHz, choose SNO31-1/2-5, 10 or 15 for improved common mode rejection (see graph for comparison)

Note: Ferrite beads may be hexagonal or square shape depending on inventory on hand at time of order.

The ring toroids are useful for AC/DC common mode choking with multiple turns as shown below

20131210 114716 300x180 - Ferrite Ring Combo Pack

AC Cable on F-240 Toroid – 7 turns

20150125 103738 300x168 - Ferrite Ring Combo Pack

DC Cable on F240 – 4 turns

The ring toroids can also be used on coax or signal lines as shown below:

20131222 125533 300x180 - Ferrite Ring Combo Pack

RG58 12 turns on FT240

20131210 115137 300x180 - Ferrite Ring Combo Pack

Ethernet Cable on F-240 Toroid – 7 turns

For RFI/EMI wrap as many turns as possible for higher choking (under 30 mHz).