HAMCALC - painless math for radio amateurs

The program provides a single source and a shell from which a wide variety of useful and interesting programs may be run. The programs include both information tables and design programs. A short sampling of topics includes the 555 timer, active filters, tone generators, perpetual calendars, a Morse code trainer, great circle path calculators, photographic depth of field, moon properties (declination, azimuth, elevation for various longitude and latitudes), and so forth.