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yes... but it can also help on some antenna systems...


I had an A-99 that had major issues, like 1.6-2 swr in the CB band...


I did a 4.25" diameter coil with 5 turns of coax at the a99's feedpoint,  and isolated the antenna from the mast, as well as adding a home mad e GPK, FLAT SWRs and quieter receive (ie less static)