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Reflections from the ends of the cable will tend to cancel each other out with this special length cable.

After all, a ground plane antenna provides a nicer match.

I have a friend with a 56' LOD ketch who's solved the problem by using the topmast shroud on his mizzen antenna and a jumper wire up to the triatic stay.

Some use whip antennas on the stern.

The G5RV is an excellent choice for the 20 meter band.

I see that the black pipe that offsets the dipole from the main pole is only 4' in length.

The model is highly sensitive to the stated assumptions, so its conclusions might not be applicable to variations on the design… but it does highlight important elements of the context of this antenna SYSTEM.

Now for some question we might hope 4NEC2 can answer.

5 percent of overall length see also my article.