Question: what is the formula for determining the length of a half wave dipole?
Answer: To find the half wave, divide that number by two. This will give you the length of each leg of the antenna. Example — 80 meters: If you are operating on 3.8 MHz, dividing 3.8 into 468 gives 123.16 feet over all. To find the half wave, dividing 123.16 feet by 2 gives 61.58 feet for each leg.