CMC-154S-3K 1-54MHz

Description

CMC-154S-3K Common Mode Choke / Noise Suppressor / RF Isolator

This is a smaller (economy version) of the popular CMC-154-3K. This product has 3300-8,200 Ohms of CMI (Common Mode Impedance). Compared to a similar size to the old MFJ-915 beaded choke, but with more than ten times higher CMI values, the MFJ-915 has ~500-1000 Ohms of CMI 1-30MHz and much less at 54MHz.

• Multi-Zs™ Technology
• Perfect to cure RFI/EMI problems.
• Great noise suppressor!
• 
• Common-mode attenuation is up to ~38dB max. (measured in 50 Ohms systems)
• Zmag-Impedance Magnitude     
• Rs-Series Choking Resistance      
• Xs-Series Choking Reactance

It is a cure for noisy locations, instantly reducing the noise floor of your receiver by several S-units.  If you have unbalanced antennas, such as an OCF dipole or your antennas close to your home, adding one CMC154S-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-154S-3K has huge Resistive values of common-mode choking Impedance from 1.8-54MHz. Click the chart on the side for actual measurement data.

Unlike other companies, we do not claim unrealistic impedance values or frequency coverage. Most importantly, the value of CMC-130S-3K Common Mode Choking Impedance and its Resistive (Rs) part is always higher than the Reactive part (Xs) over the working bandwidth. This parameter, Rs>Xs, ensures that our CMC will NOT increase common-mode currents as could occur 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

CMC-130S-3K Features:

• SO-239 Connectors, which produce no impedance bump but maintain the continuity of the coaxial cable where the choke is inserted, help minimize RF leakage in multi/contest station setups.
• Capable of more than the legal power (1500W) in the USA.  It is rated up to 3kW in the HF band.
• The Enclosure is UV-stable and could be used outside.
  

*ICAS = Intermittent Commercial and Amateur Service