On 14/11/2020 07:32, Barry Murrell ZS2EZ wrote:
did he explain why rotator bearings should be relative to
magnetic North, that seems strange and unintuitive to me. The
magnetic N pole moves and can even flip with the magnetic S pole
(although probably not in the lifetime of your station equipment).
Maps are usually oriented with True North. I don't see any benefit
with aerial alignment to magnetic N other than some notional
propagation correlation, which is probably incorrect as the
Auroral Ovals are to some extent aligned with the Solar Zenith as
they are with the Earth's magnetic field. If you wanted to align
aerials with propagation features you should probably put a stick
in the ground and use it's shadow as a guide!