Simple Dipole Feed Line Choke - RG8X - RFI Range: 1-100 MHz
Simple Dipole Feed Line Choke for 1/4" coax (1.8-61 MHz)
simplest, most cost effective feed line choke is a ferrite ring installed as shown in the picture (at the antenna feed point).
Improves antenna pattern by preventing your dipole from becoming a tripole
Prevents pesky coax braid radiation and RFI
for best results use multiple turns through center
Use one choke for each antenna feed line