1kW Radio-Stuff Common Mode Choke Line Isolator
The 1kW Radio-Stuff Common Mode Choke Line Isolator is a high-performance upgrade from our 400W model, specifically designed to support the UK’s legal 1kW power limit. It effectively suppresses common mode currents and reduces unwanted electromagnetic (EMI) and radio frequency interference (RFI) within your antenna system.
Premium Construction for Maximum Performance
Built with our custom PCB and high-quality RG142 silver-plated copper double-braided coax, featuring a PTFE dielectric and a durable brown FEP jacket, this choke is engineered for reliable, long-term performance. It comfortably supports the UK’s maximum legal power limit.
Versatile Placement Options
This common mode choke is ideal for use at the transceiver side of your antenna system. It can be placed:
- Just below an End-Fed Half-Wave (EFHW) or End-Fed Random Wire (EFRW) antenna
- At the center of a dipole
Superior Choking Performance with the Fair-Rite 240-43 Core
The standard model includes a Fair-Rite 240-43 core, known for its excellent all-around performance across the 80m to 10m bands.
Other core options are availabl if you're unsure which CMC is best for your setup, contact us—we’re happy to help!
Key Features:
- Impedance: Greater than -30dB from 80m to 10m
- SWR Performance: Flat SWR sweep with a 50Ω dummy load
- Low Insertion Loss: Less than 0.1dB
- Power Handling: Up to 1kW
High-Quality Materials:
- RG142 coaxial cable – silver-plated copper double braid, 50Ω
- Radio-Stuff.com custom PCB
- ABS-sealed case with premium SO-239 connectors
- Stainless steel nuts bolts and connections
Choosing the Right Core
For the best overall performance at the most affordable price, we recommend selecting the 240-43 core.
Optimizing Your Setup
For the best results, we recommend using:
- One CMC at each antenna feed point
- One CMC in the shack, between the antenna and your transceiver/linear amplifier
- For EFHW antennas: Place the CMC 0.05 wavelengths below the EFHW transformer
Upgrade your antenna system today with the 1kW Radio-Stuff Common Mode Choke Line Isolator for cleaner signals and reduced interference!