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I might suggest that AFSK be the first step since it is easy to integrate on any OS platform (Direwolf, UZ7HO).? You won't see a ton of difference in throughput, maybe less actually using BPSK, but if condx are rough, switching to BPSK 125R will get you through pretty well, and it works ok on NVIS and Skywave? because the signal is a bit wider than 31, or 63.? Mitigates the doppler issues.

It might be good to round up the troops on "TheRovers" RATS channel to coordinate testing.

On your antenna selection, if you have 150 feet or so, try an 80m OCF dipole.? They work great and you don't need them very high if you want NVIS on 80 and 40.? Sky kicks in fine with 20 and higher.? 30 has a mind of it's own. ;)?? If you are short on space, you can use a 40m version at half the length or you can bend the long end of the 80m version, keeping the included angle > 90 degrees.? Mine is only 15 feet or so above ground at the center.? The short leg slopes down to about 10 ft.? The long leg is more or less flat.? Needs a tuner for 30 and 15, but otherwise, with careful trimming, you won't need much in the way of a tuner.? I have a PDF of how to construct one if anyone wants it.? Find it here :?