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
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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