“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.
- CMC-Beverage, Common Mode Choke for use with receiving antennas such as Beverages, K9AY loop etc.
- CMC-200 HF, Common Mode choke for use with Transceivers up to 200W output.
- CMC-1K HF, Common Mode Choke for use with Amplifiers up to 1kW , such as Acom 1000, TL922, SB220, FL2100 etc.
- CMC-4K HF, Common Mode Choke for use with amplifiers up to 4kW such as OM2500, OM3500, Alpha 8140, Alpha 8100, Alpha 99 etc.