Then again, the regs and band plans have us bound up pretty tightly.
Not a whole lot of room left to experiement with modulation schemes.

Antennas are still wide open, but it seems a lot like aerodynamics, all the
good work was done in wwII, and not much progress since, except for tweaks.

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KC6ETE Dave's Engineering Page, www.dvanhorn.org
Microcontroller Consultant, specializing in Atmel AVR