Antennas with gain and good F/B can be a challenge on the low-bands. This is especially true if only one support, such as a tower, is available. It turns out there are a lot of relatively simple ways to build a vertically polarized array with very good performance. Half wave sloper arrays have many possibilities as shown in High performance half-sloper arrays , 1,104 kb, QEX Jan/Feb 2004. There are also a variety of other ways to go, as discussed in single support gain antennas, 415 kb, NCJ Mar/Apr 2003.