DC-Ground antennas like J-Poles and Slim Jims work best when you can create a choke balun of 5 loops of coax near the feed point of the the antenna. But stiffer cable like RG-8U, RG-213, or LMR-400 can be difficult to loop. These snap on ferrite beads solve the problem. Placing three of these snap ferrites near the feed point of your antenna will accomplish the same task as a coiled choke balun, that is stopping any stray RF energy from traveling back down the outside of the coax cable braid.
- Snap on type ferrite choke
- Type 31 mix ferrite material
- 11mm inner diamater (.413 inch)
- Fits RG-8U, RG-213, LMR-400 (or similar) cable
- Sold as a set of three