I want to check the various possible mismatches between the (coax)feedline and antenna feedpoint( adjustable loaded dipole ).

What is the influence - if any - of the Elecraft 30 dB directional coupler ( mounted in the mast right at the antenna's feedpoint ) on the transition from feedline to antenne feedpoint ?

Does the directional coupler cause an ( extra ) impedance jump between feedline and antenna feedpoint , disturbing the values of the FW and Rev readings ?

Thanks,
Peter, PE1E

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