Radio-Frequency Builders,

As I like building my own receivers, transmitters, and just plain
gadgets, I use the Professor Coyle spreadsheet to analyze existing
inductors and design new ones. You can download the Excel version from

www.crystalradio.net/professorcoyle/index.shtml

and use the Open Office spreadsheet to save it as OO file. (The
download version is below the seb-based versions.)