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On Wednesday 1st of March, a two dipole array was installed at VK7RTC. These were generously and professionally constructed by Dion VK7DB. The design picked is mainly an elliptical pattern. Dion built the dipoles with a long enough boom to be able to customize spacing. He also built the power divider with RG11 coax to suit. Below are MMANA plots.
There is a little room for error here. For instance 2 degrees of downtilt was 12.5mm physical length. So the tolerances are not really critical, well not so much as to worry me. Below is a return loss plot. I can only assume the two dips are from the two delay lines inserted.
Antenna in it's final mounting position on the mast