New! Improved! Yes, an update of my 1990s coil inductance and Q calculator is here. This version uses methods with better accuracy. Although it runs in Windows, the program retains its DOS look and feel. Those of you still using a Vibroplex bug and D-104 will feel right at home. https://www.dropbox.com/s/3bhao7stqmwz9ig/COIL.ZIP?dl=1 Brian