Eddie i have not had time to do any astroplane vs the rest A/B tests,
im very happy with how its performing vs locals antennas,
im pretty confident it will at least equal or beat any 5/8 at the same tip height,
NB is wrong about the mast & or coax not been needed inside the aperture of the basket in order to have low vswr with the astroplane as designed by avanti,
NEC is not giving false vswr results,
without the mast the lower half of the antenna is an odd shaped 5/8wave loop with high vswr,
add the mast it becomes a different animal, impedance drops to around 50ohms, mast diamater and spacing effect impedance,
what i would like to know is which of the two versions of where the upper 1/4wave is connected gives the most symetrical pattern,
extending the mast is physically symetrical & looks better but does it give a more or less symatrical pattern ?