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I think you would find just moving the source to favor the opposite side of the dipole would shift the entire curent imbalance to the other side of the dipole too. This is because a majority of these problems are the result of poor antenna design or poor matching that places standing waves on the coax line.


I know for example you can take a Sigma and tune it for a perfect 50 ohm match and experience very little if any CMC problems. If you detune that match the slightest bit you can clearly see the results of the standing waves on the coax with increased CMC problems.


This is demonstrated by the fact the position or length of the feedline shows no change in the resonant SWR when tuned correctly. When detuned even the slightest change in the position of the coax in relation to the mast can show measurable changes in reflected power. Proving we have now made the feedline a substantial part of the radiating antenna.


If the Yagi element were fed in a balanced manner and simply had its center grounded to the mast the maximum current would be in the center and trough the element with virtually no RF potential on the mast. Of course things like coax and real world matching devices don't typically allow this to work perfectly.