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"When considering the effects of feedlines it should pointed out that it is often not appreciated that a coax cable is really three conductors at RF. The three are: 1. the outside surface of the inner conductor, 2. the inside surface of the outer conductor, 3. the outside surface of the outer conductor. The outer conductor of the coax is just as much a "wire" as any other wire in the system. It is not necessary, however, to model the inner conductor and the inner surface of the outer conductor. So the coax is just modeled as another wire. "

"This calculator computes the matched line loss for a transmission line using a model calibrated from data for the transmission line types built in to the calculator. It also gives an estimate of the mismatched loss if the mismatch is specified." This model has been recommended by Cebik.

"A good rule of thumb is length in feet must equal 1.25 times the band in meters. The result is the minimum dipole length you can use without using a good matching system in, at, or near the antenna!"