If possible under all antenna installations, put the antenna in position and sweep the bands. ?Plot SWR V.S. Frequency on graph paper. ?The bottom of the "U" in the plot is the center of the design as installed. ?Use the equation for cutting the length of ?an antenna to find the length the antenna thinks it is. ?Comparing this to what you actually cut as the center. ?That will give the amount of correction in length needed. ?I have found that this gives the correct length every time. ?Only one cut for each band will be needed. ?Don need to keep cutting to find the correct length. ?If you need more help call me any time (480) 319-9423.
