End fed antennas

 A popular antenna is the end-fed if multi band coverage is needed. I use one for 17m-10m. At the end of the wire the impedance will be high so a transformer is needed to bring this to an impedance that can be directly connected to a PA or often via an auto ATU in the rig. There is a video about it on the DX Explorer YouTube channel. There is also a follow-up video.