Dan K6MHE has an old article in QST called 20 40m Vertical on Autopilot, has anyone built this antenna. It is not clear to me what would be the best length Dan K6MHE e-mail address has been closed Dual Band vertical antenna for 20/40 Located in the DXZONE website
And here's how to model the whole thing using EZNEC or AutoEZ. BTW, Danny's new email address is dmr at his call sign dot com. Dan, AC6LA https://ac6la.com