This new tool may be of interest to at least a few TowerTalk folks.
Currently being discussed, with some sample illustrations, here:
https://forums.qrz.com/index.php?threads/new-tool-toroidal-ferrite-core-inductor-calculator.768222/
Or you can download the full 13 page Help pdf and the Excel workbook
from the link at the bottom of this page:
https://sites.google.com/view/sp3l-hf-antennas/home-page/miscellaneous/toroidal-ferrite-core-inductor-calculator
Note that the workbook requires Excel 2007 or newer. It cannot be
used with other spreadsheet programs such as OpenOffice and
OfficeLibre nor with Excel 2003 and older.
Dan, AC6LA
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