Topband: Homebrew Hairpin

[Shoppa, Tim]

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