Let's discuss this more at length...is there an all-in-one HT/TNC available?
As far as charging goes, I'm looking at putting together something which will derive power from a 6V dynohub. It'll source 5VDC at 300ma and if a voltage doubler is employed ahead of the rectifier/regulator I should be able to get at least 8.4VDC at 150ma - sufficient to charge a VX6 or VX7 battery.
What did you have in mind for a design?