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My own personal experience with coaxial chokes and ferite chokes is that it effect the SWR negatively using an IMAX2000.


I popped a MJF 1:1 balun inline and that caused the SWR to jump to 2.5:1 I wondered of it seemed to interact negatively with the matching arrangement.


Similar situation with a coil of coax as per the chart above.


Just does not seem to work in my installs which can vary from place to place as I change QTH and mounts.