HF antenna Line Isolator CMC-130S-3K 1-30 MHz/ Rated @3kW / BALUN / RF choke
"The common-mode filter or choke may be one of the best-kept secrets". American Radio Relay League Antenna Handbook. If you use End Fed antenna aka 9:1 UNUN with a piece of wire, OCF dipole antenna or have any RFI problem, use the best tool to cure it. Great for CB and HF mobile operation. Do not fall for those coiled coax chokes which can make the problem worse in some cases. There is no shortcut when it comes to curing RFI/EMI problems after all Ferrite materials are invented for that purpose. Ferrite turns the RF energy into heat, coiled coax does not! CMC-130S-3K Common Mode Choke / Noise Suppressor / Line Isolator / RFI Suppressor Designed by Danny Horvat, E73M -former Cushcraft antenna designer. CMC-130S-3K Common Mode Choke / Noise Suppressor / RF Isolator/ Current Type BALUN 1:1. This is smaller (economy version) of a popular CMC-130-3K.
This product has 5000-10,000 Ohms of CMI (Common Mode Impedance) on 1.8-30MHz while maintaining a Resistive part of CMI for more than 25MHz of the frequency spectrum. Perfect to cure RFI/EMI problems. Common-mode attenuation is up to 40dB max. (measured in 50 Ohms systems).
Serves as Current Type 1:1 BALUN. 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 CMC130S-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. Unlike other companies, we do not claim unrealistic impedance values or frequency coverage.Most important, the value of CMC-130S-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. SO-239 PTFE (Teflon®) Connectors which produce no impedance bump but the 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 than legal power (1500W) in the USA. It is rated up to 3kW in HF band. The Enclosure is UV stable and could be used outside. This item is in the category "Consumer Electronics\Radio Communication\Ham, Amateur Radio\Other Ham Radio Equipment". The seller is "myantennas" and is located in this country: US. This item can be shipped worldwide.
- To Fit: End fed antenna, EFHW antenna, OCF Dipole, Ham Radio Amplifier, Ham Radio Receiver, Ham Radio Transceiver, Ham Radio Transmitter, Marine Radio, Scanner, Two-Way Base Radio
- Country/Region of Manufacture: United States
- Compatible Brand: Universal
- Band: HF
- Type: Choke
- Compatible Model: EFHW-8010
- MPN: CMC-130S-3K
- Brand: MyAntennas