The Ferrite Snap On Combo Pack is a convenient solution for troubleshooting RFI/EMI with various diameter cables ranging from 3/8″ to 3/4″ for use as either single turn or multiple turn ferrite chokes.
The snap on chokes are useful for RF coax, AC/DC power cables, and device interconnection cables.
Always use a snap on with a larger inside diameter than the diameter of the cable and use multiple turns if possible (2 turns through the snap on is the same as 4 snap ons with 1 turns). Included in these combo packs are our most popular snap on sizes as follows:
Mix 31 Ferrite Snap On Combo ten pack (RFI Suppression range is 1-300 MHz)
FSB31-3/8 – 3/8″ ID – 4 pieces
FSB31-1/2 – 1/2″ ID – 4 pieces
FSB31-3/4 – 3/4″ ID – 2 pieces
Normal Retail price is $56 for these parts
Also make sure you connect a good RF ground to the transceiver ground post.
Note to Flex Radio users: Use snap on ferrites for firewire cable, speaker cable and mic cable, Ring ferrites for Antenna output and DC power.
For additional RFI suppression, use a feed line choke at the antenna to suppress common current on the coax feed line – see our store for feed line choke alternatives for use at the antenna.
If you use a linear amplifier we have RFI kits for linear amplifiers that help suppress RFI in your shack or in your neighbor’s house.