What happens if I take a 68’ wire cut to be a half-wave for 40m, and wind the last 17’ or so onto a small kite-winder, in an attempt to shorten it to be a half-wave for 30m?
We’ve got all sorts of ways to shorten/lengthen a piece of wire for different bands: links with alligator clips, links with switches, chokes, etc. They work well, but they add extra “stuff” to the antenna kit.
Intuitively, it seems to me that if we can fold the end of a wire when tuning an antenna, to shorten without cutting, winding up the end is a lot like folding. Maybe winding up 17’ would create a cap hat, so I’d need to wind a little more?
I’m trying to come up with a way to use a 20/40 EFHW antenna on 30m in a pinch, without an ATU.
73 DE K4KPK/Kevin