What do High, Medium and Low represent?
In order to simplify the interface, VOAProp doesn’t require you to enter the power, antenna gain and radiation angle of each station. Instead, it gives you a slider that ranges from QRPer to big gun DXer. You can see what the calibration marks approximately represent by pointing at them with the mouse and reading the tooltip text. A zero dB gain antenna is assumed at the receiving end. Because of the inaccuracies inherent in HF propagation prediction, I consider it unnecessary to have greater control over the transmitting and receiving station parameters. If you desire that degree of control, then of course you can always use VOACAP’s native user interface. The angle of radiation from the antenna makes a big difference when it comes to DX propagation. Most hams probably have no idea what the angle of radiation of their antenna is, or have an over-optimistic idea based on a manufacturer’s exaggerated claims. The antenna height at the medium setting of the slider is taken to be 10m, a ha
