On 9/25/2012 9:46 AM, Hal Kennedy wrote: > I can supply a > coil winding Excel spreadsheet off the list to help get the coil wound. The nearly 100 year old formulas in the Handbook for winding coils are spot on. I've plugged them into a spreadsheet to crunch the numbers for me, and measurements with a VNA show that they are right on target. 73, Jim K9YC