I recently acquired a used K4IO hexbeam. I put it up on a 30ft tower with a Yaesu G450 rotor, new coax, new choke balun approximatley 150 ft run of coax to the shack. Once it was up, SWR is above 4:1 on 20 meters. lowest SWR is about 2.5:1 on 10 meters. Compared to my G5RV, an S9 signal drops down to 0 on the meter, and audio is much lower even when the beam is pointed toward the other station. I've checked everthing I can think of and Google hasn't offered any suggestions. Every comment or forum just talks about what a great antenna it is. It seems like I am the only one having a problem with it.