RFI-Choke 12" Coax Jumper with Ferrite Sleeve Beads to Prevent, Reduce or Totally Eliminate RFI

This RF choke is fantastic. Using this item at the feedpoint with a Chameleon Emcomm II for base NVIS operation. Completely stops RF from coming back down the coax.

The mix 31 Ferrite cores work really good. I made a 3 ft. jumper the same way on RG-400 Coax for $37. These mix 31 ferrite work so good. also put on your power lines , and the switching power supply's they use on cell phones , any little wall wart is a switching power supply and will make a 1 tp o 4 s-unit on your radio. I put a mix 31 core on my computer and speakers wall wart and it stopped the hash sound and s-units to. good stuff. you can buy any size core you need on amazon.