“?Often my antenna is a rather high Q base loaded vertical in which small adjustment to the coil position can result in big swings in feed point impedance.” If you’re concerned about protecting the finals while finding the right tap on the coil you might consider a different solution. An ?N7VE LED SWR bridge between the QMX and your antenna, in ?the tune position, would keep the radio from never seeing an SWR over 2:1. ?
QRPguys and qrpkits (mini SWR indicator) has them. Or better yet make one, they’re very simple and low cost. Light weight, it won’t add any significant burden on your ?field operations.
73 Steve W6WU?
