In Ham Radio, the Lines Isolator has become one of the most talked about items for antenna installations. How ti make one and where to put it are popular questions. But also where in the feed line shod you put it are also familiar questions. Peter G3OJV describes how you can easily build a low cost line isolator that is effective across a broad part of the RF spectrum.
RF Chokes - What You Need to Know
https://www.youtube.com/watch?v=qqv-qoN2Fts
PL259 compression plugs
https://www.hamradiostore.co.uk/pl259-compression-plug-6mm-for-rg58?___store=hamradiostore
Ferrite 240-43