Total posts : 45366
I’ve been focusing on going low end rather than high end (frequency) not just because I want to focus on groundwave propagation but also because of the issues you raise with stray capacitance in RF coils. The lower the operating frequency, the more negligible those factors become.
Of course there are antenna limitations, and the lower the frequency of operation, the further away one gets from a decent fraction-wave length when talking about a mast type radiator.
Where can I find discussions of dipole type antennae regarding the low end of the spectrum? Seems to me horizontal rather than vertical would actually be prefered when focusing on groundwave propagation anyway. A quarter-wave antenna for 600 kHz is a handleable 195 feet.