Ok, for a fellow HAM I will go ahead and expose myself here as I really enjoy these discussions:
KB0RQB here and 73s by the way...
For those in the USA you can look that up on the ARRL website for easier lookup than the FCC. Both are perfectly unique and indisputable sources for identification, and if you'd like I can provide proof of my own identity as well.
If anyone would like, I'd be happy to discuss in detail the following, but I won't bore you with details unless requested. I will just state that it is indeed factual, and again state I can back it up with plenty of whatever proofs and demonstrations if you would like. Radio is rather fun.
I think a very simple example, which may have been provided here already (I skipped to the end sorry - getting tired), is atmospheric bounce, as it does not just travel in a straight line - it bounces multiple times off of the atmosphere, from your station - up, then down to the ground, then back up again, down again, and so on - until it comes back around ... when conditions are ideal. This works really well around 8 and 10 meters.
Now then, the major kicker here is the following:
I'm in Missouri, USA. Say I point My Antenna towards California right? Well, not only might I make a contact in say... New Jersey, I may also make a contact in China, then Turkey, then Spain or Portugal, THEN New Jersey, etc.
Now the problem with all that is that kind of radio propagation is only going to happen line of sight. It doesn't matter what kind of magnetic or bouncy medium you try to come up with - the amount of time it takes to come back to you - at the frequencies being used - only allows for a straight line - with a travel distance between the Earth, atmosphere, and known wavelength.
So basically, an entirely Flat Earth, especially one that has no option for an underside - no possibility for reflection or deflection around it's "sides" to continue around it with the land masses laid out in a straight line as seen on a world map: it can't happen.
I've tried to work it out in some sort of FE and will continue to give it a shot, but off the vuff - I just don't see it.
Take care all,
- Optimus