Jay has an article in the April QST entitled A Coupled-Resonator Antenna. Jay did this as a club talk last year. This talk is related to his first. It is also the Free Article of the month. See https://www.arrl.org/files/file/QST/This%20Month%20in%20QST/2023/04%20Apr%2023/TAFT.pdf for a refresher.

The COIL program discussed this evening can be found here.

http://ham-radio.com/k6sti/coil.htm