K9YC writes: > 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.
I have a flat-top T transmit antenna as well. I modeled it with EZNEC, found its feed resistance/reactance, fed these into a L-match program, came up with L and C, then wound the L using the handbook formulas. It worked, right on the money, absolutely no "cut and try". I was very impressed that everything worked right first try. Rarely does that happens in my projects. More typically my projects proceed like this: http://www.youtube.com/watch?v=gnN8k9JRihs Tim N3QE _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
