Common-mode chokes may be the best kept secret in Amateur Radio. To eliminate common-mode signals properly, you need common-mode chokes. They may help nearly any interference problem, from cable TV to telephones to audio interference caused by RF picked up on speaker leads. ARRL Handbook
We are proud to present our line of CMC-common mode chokes also called Line insulators which are great to prevent following problems:
- to reduce the fraction of the RF power that is fed to your antenna from your transmitter, but then is conducted back to your shack via common-mode current on your feedline, causing RFI trouble in the shack or elsewhere in your house;
- to keep the transmitted RF power that 50(60)-Hz power, telephone, TV, and other cables in the field of your antenna pick up, from bothering susceptible devices connected to these cables in your own and neighbors’ houses; and
- to keep the RF noise that all the electronic devices in your house generate, from being conducted via 50(60)-Hz power, telephone and other cables to the outer shield of your radio, and from there along your feedline(s) to your antenna(s), in common-mode.
