I had a Ringo a few years before and saw their performance was similar so I felt justified in telling people my antenna was a "Merry-Go-Ringo".Thanks for the reply, NB. That's just the kind of 'nutty' thing that gets my attention. Love it. Surely your neighbors weren't looking while you whizzed that thing back and forth??
Your model looks a bit taller.Did you consider the mast, not being directly below the antenna, as having any skewing effects on the A99 pattern? What if skewing made the antenna show directionality...with more gain in the direction of the 14' offset boom section and far less gain in the opposite direction?
Mine was on a 4-section TV telescoping push-up mast but I kept the top section down inside the next one below it for double-wall strength, and if I recall had about 6' of the top 2, 7' of the next one down and 10' on the bottom with about a foot shoved into the dirt, so 9'+ 7'+ 6' = 22' to the rotor. Rotor + top extension maybe another foot, about 23' total to the base of the A99.
Some came in better off the sides of the arm, some off the ends. Don't believe I noticed the arm direction skewing the results significantly.