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
Full Wave Loop Antenna Wire Kit for vertical or horizontal loops (square, rectangle or delta shaped) from 160 meters to 10 meter. Includes end insulators, #14 Insulated stranded copper wire and spade lugs for attachment to an optional balun
Insulators are a very stealthy, strong, 4 PVC, 2 1/4" long. 1" wide. 1 1/8" hole separation wire antenna insulators and may be black, gray or white depending upon inventory.
Typical size id 1005/F(MHz) and cut for lowest frequency in band segment.
For multi-band capability use 4:1 balun such as our Bullet-4BEB-500/1500 or CB-4-1500EB/5000EB with a feed line choke below it or best bet is to use the Hybird 4:1 + 1:1 balun, CB-4-1-1500. For single band use a 2:1 balun such as a Bullet-2B-500/1500 or CB-2-1500/5000EB. with a feed line choke below it or the hybrid CB-2-1-1500EB with built in 2:1 and 1:1 balun.
The ring toroids are useful for AC/DC common mode choking with multiple turns as shown below
 AC Cable on F-240 Toroid – 7 turns |
 DC Cable on F240 – 4 turns |
The ring toroids can also be used on coax or signal lines as shown below:
 RG58 12 turns on FT240 |
 Ethernet Cable on F-240 Toroid – 7 turns |
For RFI/EMI wrap as many turns as possible for higher choking (under 30 mHz).