> >Yes, this is what I observe on my > >analyzer. Lighter loading runs up IG > >and doesn't have much effect on the > >harmonics or spurs. > > So a few % heavier loading > has no noticable effect on harmonics. No, lighter antenna loading (more load C after max out reached ) had a minor effect. Heavier antenna loading (less load C) had a pronounced effect on harmonics and spurs. Paul