This should work with more than the TI-84+ but I have no way to test it. This program will take a center frequency and tell you the length in feet to make each side of the dipole. Then the program will instruct you to build, raise and connect the antenna for tuning. At this point you will need a SWR meter and find the frequency with the lowest SWR, then the app will tell you how much to trim/add to get the same frequency you originally entered. After that it will tell you 5 of the frequencies this dipole is resonant on, you may need a tuner to get them all but this will help you to design one dipole for several frequencies.
This program uses TI-BASIC so it should be compatible with any TI calculator with TI-BASIC. To run it hit PRGM on the calculator then select Dipole
http://www.megaupload.com/?d=MMXO4CDI
