Black Cat Systems has updated DX Toolbox ( — a radio propagation/conditions analysis and forecasting tool for amateur radio operators, shortwave listeners, and other radio enthusiasts — to version 3.6.1. This version fixes bugs with the DX Cluster window, and display of solar flux values.

Several propagation forecasting charts are available in DX Toolbox to estimate signal levels and path conditions between any two points on the Earth. A grayline map of the world is also available. In addition to several propagation forecasting tools, DX Toolbox also gathers a variety of solar and geomagnetic information from real-time online sources, and presents them in charts and tables,

DX Toolbox sells for US$24.99, though version 3.6.1 is a free upgrade for registered users of version 3.x.