Now you can get a ferrite snap on combo pack of 10 RFI filters in our most popular 1/2" size with all three filter ranges (great if you don't know the interfering frequency and need to cover the entire range when troubleshooting an RFI problem).
Mix 75 covers 150 KHz to 10 MHz (3 filters)
Mix 31 covers 1-300 MHz (usable to 500 MHz) (4 filters)
Mix 61 covers 200-2000 MHz (3 filters)
Use multiple turns for best results. (2 turns - 4 times a single turn, 3 turns = 9 times a single turn, etc.)
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.