Well my issues with the yagi were likely beyond antenna principles.. for one it's made from PVC and allows some of the beams inside to slide, which probably puts the SWR all over the place. And worse I was using more PVC as a tower, which was great in the calm back yard but when brought out to windy BFE it flopped like crazy, made for an almost dangerous situation...
I ended up pulling it down and didn't mess with it much.
So I'm pushing for a more robust setup for next year. BTW, I received my Arrow J-Pole on Wednesday... very well built and in my hands 2 days after I ordered it. In hindsight I probably didn't need the bag, it's about 3x larger than it needs to be, but ah well it will still pack into the truck or camper just fine.
82 fj40, 99 uzj100, 06 gx470
97 DR650, 05 525EXC, 01 XT225, 09 TTR125, 07 TTR90, 07 CRF50