40m band Yagi antennas, coils are used to "shorten" the antenna elements, which are typically designed for a full wavelength at the 7 MHz frequency. By adding coils, the antenna can be physically smaller while still maintaining its intended performance. This also helps to adjust the resonant frequency of the antenna to the desired operating range. #hamradio #amateurradio #hamradiooperator #hamradiocommuity #amateurradiohobby #TuneIntoTheWorld #EnjoyTheHobby #SolarCycle25 | 4 F 1 E B D Amateur Ra