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
![Ferrite Ring Combo Pack 1487159529 - Ferrite Ring Combo Pack](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/1487159529.jpg?ssl=1)
![Ferrite Ring Combo Pack 1859661919 - Ferrite Ring Combo Pack](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/1859661919.jpg?ssl=1)
![Ferrite Ring Combo Pack 1861306038 - Ferrite Ring Combo Pack](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/1861306038.jpg?ssl=1)
![Ferrite Ring Combo Pack 2385220513 - Ferrite Ring Combo Pack](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/2385220513.jpg?ssl=1)
![Ferrite Ring Combo Pack 2385165615 - Ferrite Ring Combo Pack](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/2385165615.jpg?ssl=1)
![Ferrite Ring Combo Pack 1939449975 - Ferrite Ring Combo Pack](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/1939449975.jpg?ssl=1)
![Ferrite Ring Combo Pack 672806530 - Ferrite Ring Combo Pack](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/672806530.jpg?ssl=1)
![Ferrite Ring Combo Pack 749899728 - Ferrite Ring Combo Pack](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/749899728.jpg?ssl=1)
![Ferrite Ring Combo Pack 1674815397 - Ferrite Ring Combo Pack](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/1674815397.jpg?ssl=1)
![Ferrite Ring Combo Pack 749899753 - Ferrite Ring Combo Pack](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/749899753.jpg?ssl=1)
The ring toroids are useful for AC/DC common mode choking with multiple turns as shown below
The ring toroids can also be used on coax or signal lines as shown below:
For RFI/EMI wrap as many turns as possible for higher choking (under 30 mHz).