Common Mode Filter Choke / Noise Suppressor / Line Isolator
The common-mode filter or choke may be one of the best-kept secrets… www.ARRL.org
- Covers 1-30MHz
- Power 3kW *ICAS
- Common-mode attenuation: ~41dB
- Choking Impedance 7,000-15,000 Ohms
CMC-130-3K Common Mode Filter Choke / Noise Suppressor / RF Isolator
This is the one and only Common Mode Filter Choke for 1-30 MHz on the market. PATENT pending! It is only product with over 10,000 Ohms of CMI (Common Mode Impedance) on 3.8-30MHz while maintaining a Resistive part of CMI for more than 25MHz of the frequency spectrum.
- Perfect to cure RFI/EMI problems.
- Great noise suppressor!
- Common-mode attenuation is up to ~41dB max. (measured in 50 Ohms systems)
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 CMC130-3K 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-130K has huge Resistive values of Common Mode Choking Impedance from 1.8-30MHz, 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-130-3K 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
- SO-239 PTFE (Teflon®) Connectors which produce no impedance bump but continuity of coaxial cable where the choke is inserted, it helps minimize leakage of RF in multi/contest stations setups.
- PTFE (Teflon®) insulated coaxial cable used can handle a lot more then legal power (1500W) in USA. It is rated up to 3kW in HF band.
- The Enclosure is UV stable and could be used outside.
- Zmag-Impedance Magnitude
- Rs-Series Choking Resistance
- Xs-Series Choking Reactance
*ICAS = Intermittent Commercial and Amateur Service