Common Mode Choke / Noise Suppressor / Line Isolator
The common-mode filter or choke may be one of the best-kept secrets… www.ARRL.org
- Covers 3-30MHz
- Power 1kW *ICAS
- Choking Impedance 7000-9000 Ohms
CMC-330-1K Common Mode Choke / Noise Suppressor / Line Isolator
This is Common Mode Choke – CMC or RF Isolator for use with amplifiers up to 1000W *ICAS output. Great to use after amplifiers such as ACOM 1000, 1010, Kenwood TL922, Heathkit SB200, SB220, Ameritron AL572, AL80, AL811 etc. Perfect to cure RFI/EMI problems. Great noise suppressor! It is a cure for noisy locations, reduce the noise floor of your receiver by several S-units instantly. If you have unbalanced antennas such as OCF dipole or your antennas close to your home, adding one CMC-330-1K will greatly reduce RF Interference problems on your equipment and 120/220V wiring inside your home. We do not claim “one size fits all” but actually, we design, measure and make such products. Our CMC-330-1K has huge Resistive values of Common Mode Choking Impedance from 3 -30MHz or almost whole HF spectrum, click the chart on the side for actual measurement data. Unlike other companies, we do not claim unrealistic impedance values or frequency coverage. Most important, the value of CMC-330-1K Common Mode Choking Impedance and its Resistive (Rs) part is always higher than Reactive part (Xs) over the working bandwidth. This parameter, Rs>Xs ensure that our CMC will NOT increase common mode currents as could with inferior coaxial cable chokes.
Only chokes with Resistive (Rs>Xs) CMI- Common Mode Impedance stops and dissipate unwanted RF or noise coming to your equipment for sure.
See the video of CMC’s in action at AC0HF station
- Cascaded chokes for maximum Choking Impedance and frequency coverage.
- SO-239 PTFE (Teflon®) Connectors
- RG-316 PTFE (Teflon®) insulated coaxial cable used, can handle a lot more power than 1oooW (3kW on 3.5MHz)
- Zmag-Impedance Magnitude
- Rs-Series Choking Resistance
- Xs-Series Choking Reactance
*ICAS = Intermittent Commercial and Amateur Service